feat(backend::scheduler) deadlock spotted

Backend refactor

.env

@@ -1,2 +1,19 @@
-BLOG_ENDPOINT=https://raw.githubusercontents.com/lumither/blog-posts/master
+# postgres settings
-; use mirror
+DB_HOST=localhost
+DB_PORT=5432
+#POSTGRES_PASSWORD=
+POSTGRES_USER=nocturne
+POSTGRES_DB=nocturne
+POSTGRES_HOST=postgres
+
+# backend settings
+#GIT_WORK_DIR=../blog_posts_git
+#LOG_ROOT_DIR=/var/log/nocturne
+#BLOG_ENDPOINT=https://github.com/Lumither/blog-posts.git
+BLOG_GIT_URL=https://github.com/Lumither/blog-posts.git
+WORK_DIR=/nocturne
+#BACKEND_PORT=3001
+
+# frontend settings
+API_LOCAL_URL=http://backend:3001
+API_REMOTE_URL=https://lumither.com/api

.gitignore

@@ -1,42 +1,10 @@
-# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+# confidential
+.env.*
+/container/*/.env
 
-# dependencies
+# IDE related
-/node_modules
-/.pnp
-.pnp.js
-.yarn/install-state.gz
-
-# testing
-/coverage
-
-# next.js
-/.next/
-/out/
-
-# production
-/build
-
-# misc
-.DS_Store
-*.pem
-
-# debug
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-
-# local env files
-.env*.local
-
-# vercel
-.vercel
-
-# typescript
-*.tsbuildinfo
-next-env.d.ts
-
-# bun
-bun.lockb
-
-# ide related
 .idea
+.vscode
+
+# exclude post repo
+/blog_posts_git

Makefile

@@ -0,0 +1,9 @@
+ARCH := $(shell uname -m)
+ifeq ($(ARCH), arm64)
+    ARCH := aarch64
+endif
+
+.PHONY: up
+clean:
+	echo "todo"
+

README.md

@@ -1,83 +1,16 @@
-# This branch was deprecated.
+# `Nocturne: Personal Website`
 
-In the initial plan of the blog, `raw.githubusercontent.com/<usr>/<branch>/<path_to_file>` (or any other git server)
+This is the code repo of my [personal website](https://lumither.com),
-was used as the cdn for the blog website, which also come with VCS without effort.
+and [here](https://github.com/Lumither/blog-posts/) is the link to the
+content (blog posts etc.) repo.
 
-The idea is to build a separate repo that will be served as a database in ideal blog system structure, and all the
+Powered by Next.js and Rust, built with passion and love
-functionality related to CMS will be hosted by cloudflare worker.
 
-```bash
+> [!NOTE]
-master > tree
+> This system is not production ready, and contains bugs, (security risk potentially).
-.
+> But have fun on it =)
-├── idx.json
-└── posts
-    ├── another_article.md
-    ├── hello_world.md
-    └── idx.json
 
-2 directories, 3 files
+# Todos
-```
 
-This is an example of [db repo](https://github.com/Lumither/blog-posts.git).
+- [ ] the todo list lol
-
+- [ ] and much more...
-```bash
-
-master > cat idx.json
-{
-    "idx": [
-        {
-            "type": "dir",
-            "name": "posts"
-        }
-    ]
-}
-master > cat ./posts/idx.json
-{
-    "idx": [
-        {
-            "type": "md",
-            "name": "another_article.md",
-            "meta": {
-                "title": "another_article!",
-                "desc": "test",
-                "tag": ["blog", "test", "dev"]
-            }
-        },
-        {
-            "type": "md",
-            "name": "hello_world.md",
-            "meta": {
-                "title": "Hello World!",
-                "desc": "test",
-                "tag": ["blog", "test", "dev"]
-            }
-        }
-    ]
-}
-```
-
-These are examples of `idx.json`. They were designed to be placed at any layer of the directory, and used
-to accelerate the client side browsing. The following is an easy [implementation](/app/blog/fetch_posts.ts) of using `idx.json` at `/posts` 
-to get a list of blog posts.
-
-```ts
-export default async function fetch_posts(url: string): Promise<Result<JSON[], Error>> {
-    const response = await fetch(`${ url }/posts/idx.json`);
-    if (!response.ok) {
-        return {
-            ok: false,
-            error: new Error(response.statusText)
-        };
-    }
-    const res = await response.json();
-    const posts = res['idx'].filter((posts: { type: string }) => posts.type === 'md');
-    return {
-        ok: true,
-        value: posts
-    };
-}
-```
-
-The approach work impressively well, thanks for the globe services of GitHub lol, but eventually the plan was changed
-due to ethical reasons and possibility of breaking GitHub's EULA. Plus, the functionality of the blog site might be constrained due to
-Cloudflare worker's CPU time limitations, considering the existence of potential resource-intense work such as on-site searching and analytics.

app/about/page.tsx

@@ -1,9 +0,0 @@
-import React from 'react';
-
-function About() {
-    return (
-        <div></div>
-    );
-}
-
-export default About;

app/blog/BlogPostCard.tsx

@@ -1,33 +0,0 @@
-import React from 'react';
-import Link from 'next/link';
-import { Card, CardBody, CardHeader } from '@nextui-org/card';
-import { Divider } from '@nextui-org/react';
-
-type Props = {
-    post: JSON
-}
-
-function BlogPostCard({ post }: Props) {
-    const name = (post as any)['name'];
-    const { title, desc } = (post as any)['meta'] as { title: string, desc: string };
-    return (
-
-        <div>
-            {/*todo: to be update*/ }
-            {/*<Link href={ `/blog/${ name }` }>*/}
-                <Card>
-                    <CardHeader>
-                        <p className={ 'font-bold' }>{ title }</p>
-                    </CardHeader>
-                    <Divider />
-                    <CardBody>
-                        { desc }
-                    </CardBody>
-                </Card>
-            {/*</Link>*/}
-        </div>
-    );
-
-}
-
-export default BlogPostCard;

app/blog/fetch_posts.ts

@@ -1,19 +0,0 @@
-import { Result } from '@/app/public/type/Result';
-
-export default async function fetch_posts(url: string): Promise<Result<JSON[], Error>> {
-    const response = await fetch(`${ url }/posts/idx.json`);
-    if (!response.ok) {
-        return {
-            ok: false,
-            error: new Error(response.statusText)
-        };
-    }
-    const res = await response.json();
-    const posts = res['idx'].filter((posts: { type: string }) => posts.type === 'md');
-    return {
-        ok: true,
-        value: posts
-    };
-}
-
-

app/blog/layout.tsx

@@ -1,15 +0,0 @@
-import React from 'react';
-
-function Layout({
-    children
-}: {
-    children: React.ReactNode;
-}) {
-    return (
-        <div className={ 'flex items-stretch justify-center' }>
-            { children }
-        </div>
-    );
-}
-
-export default Layout;

app/blog/page.tsx

@@ -1,28 +0,0 @@
-import React from 'react';
-import fetch_posts from '@/app/blog/fetch_posts';
-import BlogPostCard from '@/app/blog/BlogPostCard';
-
-async function Blog() {
-
-    const res = await fetch_posts(process.env.BLOG_ENDPOINT!);
-    if (!res.ok) {
-        console.log(res.error);
-        return;
-    }
-    const posts = res.value;
-    // console.log(posts);
-
-    return (
-
-        // blog list
-        <ul className={ 'flex flex-col items-center w-full max-w-[1024px]' }>
-            { posts.map((post, key) => (
-                <li key={ key } className={ 'my-3.5 mx-7 w-[80%]' }>
-                    <BlogPostCard post={ post } />
-                </li>)
-            ) }
-        </ul>
-    );
-}
-
-export default Blog;

app/globals.css

@@ -1,3 +0,0 @@
-@tailwind base;
-@tailwind components;
-@tailwind utilities;

app/page.tsx

@@ -1,7 +0,0 @@
-export default function Home() {
-    return (
-        <main>
-            {/*<ThemeSwitcher />*/ }
-        </main>
-    );
-}

backend/.dockerignore

@@ -0,0 +1,3 @@
+/target
+
+/Cargo.lock

backend/.gitignore

@@ -0,0 +1,18 @@
+### Rust template
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+.env.local
+

backend/Cargo.toml

@@ -0,0 +1,7 @@
+[workspace]
+resolver = "3"
+members = [
+    "server",
+    "macros",
+    "markdown",
+]

backend/macros/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "macros"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+tracing = "0.1.40"
+tracing-subscriber = "0.3.18"

backend/macros/src/dev.rs

@@ -0,0 +1,6 @@
+#[macro_export]
+macro_rules! dev_consume {
+    ($($var:ident),+) => {
+        $(let _ = $var;)*
+    };
+}

backend/macros/src/include_str.rs

@@ -0,0 +1,24 @@
+/// Includes a UTF-8 encoded file as a string
+///
+/// The file is located relative to `CARGO_MANIFEST_DIR`.
+///
+/// # Example
+/// ```rust
+/// use macros::include_str_from_crate_root;
+///
+/// let str: &str = include_str_from_crate_root!("/query/scheme.sql");
+///
+// todo: impl
+// const PATH_PREFIX: &str = "/src";
+// let str: &str = include_str_from_crate_root!("{}/query/scheme.sql", PATH_PREFIX);
+/// ```
+#[macro_export]
+macro_rules! include_str_from_crate_root {
+    // ($path:literal $(, $($arg:tt)*)?) => {
+    // ($path:expr, $($args:tt)*) => {
+    //     include_str!(concat!(env!("CARGO_MANIFEST_DIR"), format_args!($path, $($args)*)))
+    // };
+    ($path:expr) => {
+        include_str!(concat!(env!("CARGO_MANIFEST_DIR"), $path))
+    };
+}

backend/macros/src/lib.rs

@@ -0,0 +1,3 @@
+mod dev;
+mod include_str;
+mod log;

backend/macros/src/log.rs

@@ -0,0 +1,64 @@
+/// log the message at specific log level and exit(1)
+///
+/// # Example
+/// ```rust
+///
+/// use macros::panic_with_log;
+/// use tracing::Level;
+///
+/// panic_with_log!(Level::ERROR, "test panicked: {}", 42);
+/// ```
+#[macro_export]
+macro_rules! panic_with_log {
+    ($level:expr, $msg:literal $(, $($arg:tt)*)?) => {{
+        use std::process;
+        use tracing::event;
+        event!($level, $msg $(, $($arg)*)?);
+        process::exit(1);
+    }};
+}
+
+/// log the message with `Level::ERROR` and exit(1)
+///
+/// # Example
+/// ```rust
+///
+/// use macros::error_panic;
+///
+/// error_panic!("test panicked: {}", 42);
+/// ```
+#[macro_export]
+macro_rules! error_panic {
+    ($msg:literal $(, $($arg:tt)*)?) => {{
+        use std::process;
+        use tracing::{event, Level};
+        event!(Level::ERROR, $msg $(, $($arg)*)?);
+        process::exit(1);
+    }};
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_panic_with_log() {
+        use std::io;
+        use tracing::Level;
+        use tracing_subscriber::prelude::*;
+        use tracing_subscriber::{Registry, fmt};
+
+        let format = tracing_subscriber::fmt::format()
+            .with_level(true)
+            .with_target(true)
+            .with_source_location(true);
+
+        let subscriber = Registry::default().with(
+            fmt::Layer::default()
+                .with_writer(io::stderr)
+                .event_format(format),
+        );
+
+        tracing::subscriber::set_global_default(subscriber).unwrap();
+
+        panic_with_log!(Level::ERROR, "Test panicked: {}", 42);
+    }
+}

backend/markdown/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "markdown"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+uuid = { version = "1.10.0", features = ["v4", "fast-rng", "serde"] }
+serde = { version = "1.0.209", features = ["derive"] }
+serde_json = "1.0.128"
+regex = "1.10.4"
+yaml-rust2 = "0.10.0"
+sha2 = "0.10.8"
+base64 = "0.22.1"
+thiserror = "2.0.3"

backend/markdown/src/error.rs

@@ -0,0 +1,16 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum Error {
+    #[error("missing front-matter field: id")]
+    MissingID,
+
+    #[error("invalid file id: {}", msg)]
+    InvalidID { msg: String },
+
+    #[error("invalid front-matter: {}", msg)]
+    InvalidFrontMatter { msg: String },
+
+    #[error("fs error: {}", msg)]
+    FSError { msg: String },
+}

backend/markdown/src/lib.rs

@@ -0,0 +1,68 @@
+mod error;
+mod utils;
+
+use std::fs;
+use std::path::Path;
+use std::str::FromStr;
+
+use crate::error::Error;
+use crate::utils::front_matter::{parse_front_matter, split_md_front_matter};
+
+use base64::{Engine, engine::general_purpose};
+use serde::Serialize;
+use serde_json::Value;
+use sha2::{Digest, Sha256};
+use uuid::Uuid;
+
+#[derive(Default, Debug, Serialize)]
+pub struct MdFile {
+    pub file_id: Uuid,
+    pub filename: String,
+    pub meta: Value,
+    pub content: String,
+    pub hash: String,
+}
+
+impl MdFile {
+    pub fn from_file(file_path: &Path) -> Result<MdFile, Error> {
+        let raw_file = match fs::read_to_string(file_path) {
+            Ok(file) => file,
+            Err(e) => return Err(Error::FSError { msg: e.to_string() }),
+        };
+        let raw_file_bytes = raw_file.as_bytes().to_vec();
+        let (front_matter_str, content) = split_md_front_matter(raw_file);
+        let front_matter = match parse_front_matter(&front_matter_str) {
+            Ok(front_matter) => front_matter,
+            Err(e) => return Err(Error::InvalidFrontMatter { msg: e.to_string() }),
+        };
+        let hash = calculate_hash_base64(&raw_file_bytes);
+        let file_id = match front_matter["id"].as_str() {
+            Some(id) => match Uuid::from_str(id) {
+                Ok(id) => id,
+                Err(e) => return Err(Error::InvalidID { msg: e.to_string() }),
+            },
+            None => return Err(Error::MissingID),
+        };
+        let file_name = Path::new(file_path)
+            .file_name()
+            .unwrap()
+            .to_str()
+            .unwrap()
+            .to_string();
+
+        Ok(MdFile {
+            file_id,
+            filename: file_name,
+            meta: front_matter,
+            content,
+            hash,
+        })
+    }
+}
+
+fn calculate_hash_base64(bytes: &Vec<u8>) -> String {
+    let mut hasher = Sha256::new();
+    hasher.update(bytes);
+    let hash = hasher.finalize().to_vec();
+    general_purpose::STANDARD.encode(hash)
+}

backend/markdown/src/utils/front_matter.rs

@@ -0,0 +1,81 @@
+use crate::utils::yaml::yaml_to_serde;
+use regex::Regex;
+use serde_json::Value;
+use std::error::Error;
+use yaml_rust2::YamlLoader;
+
+pub fn split_md_front_matter(raw_file: String) -> (String, String) {
+    let re = Regex::new(r"(?s)^(---\n.*?\n---\n)(.*)").unwrap();
+    if let Some(captures) = re.captures(raw_file.as_str()) {
+        let front_matter = captures.get(1).map_or("", |m| m.as_str()).to_string();
+        let main_content = captures.get(2).map_or("", |m| m.as_str()).to_string();
+        (front_matter, main_content)
+    } else {
+        (String::new(), raw_file)
+    }
+}
+
+pub fn parse_front_matter(front_matter: &str) -> Result<Value, Box<dyn Error>> {
+    let parsed_f_matter = YamlLoader::load_from_str(front_matter)?;
+    if parsed_f_matter.is_empty() {
+        Ok(Value::String(String::new()))
+    } else {
+        Ok(yaml_to_serde(&parsed_f_matter[0]))
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::utils::front_matter::{parse_front_matter, split_md_front_matter};
+
+    #[test]
+    fn front_matter_to_string() {
+        let (front_matter, main_content) = split_md_front_matter(
+            r##"---
+title: test_title
+date: 0000-00-00+0000
+category: test
+id: bf03afd8-61b4-4e78-a34a-8b3ee39adf16
+sub_title: sub_title
+summary: summary
+tags: [ "test1", "test2" ]
+---
+
+test body
+
+"##
+            .to_string(),
+        );
+        assert_eq!(
+            front_matter,
+            r##"---
+title: test_title
+date: 0000-00-00+0000
+category: test
+id: bf03afd8-61b4-4e78-a34a-8b3ee39adf16
+sub_title: sub_title
+summary: summary
+tags: [ "test1", "test2" ]
+---
+"##
+        );
+        assert_eq!(main_content, "\ntest body\n\n");
+    }
+
+    #[test]
+    fn test_front_matter_parser() {
+        dbg!(parse_front_matter(
+            r##"---
+title: test_title
+date: 0000-00-00+0000
+category: test
+id: bf03afd8-61b4-4e78-a34a-8b3ee39adf16
+sub_title: sub_title
+summary: summary
+tags: [ "test1", "test2" ]
+---
+"##,
+        ))
+        .expect("Failed to parse front matter");
+    }
+}

backend/markdown/src/utils/mod.rs

@@ -0,0 +1,2 @@
+pub mod front_matter;
+mod yaml;

backend/markdown/src/utils/yaml.rs

@@ -0,0 +1,29 @@
+use serde_json::Value;
+use std::str::FromStr;
+use yaml_rust2::Yaml;
+
+pub fn yaml_to_serde(yaml: &Yaml) -> Value {
+    match yaml {
+        Yaml::Null => Value::Null,
+        Yaml::Boolean(b) => Value::Bool(*b),
+        Yaml::Integer(i) => Value::Number(serde_json::Number::from(*i)),
+        Yaml::Real(s) => Value::Number(serde_json::Number::from_str(s).unwrap()),
+        Yaml::String(s) => Value::String(s.clone()),
+        Yaml::Array(arr) => Value::Array(arr.iter().map(yaml_to_serde).collect()),
+        Yaml::Hash(hash) => {
+            let obj: serde_json::map::Map<String, Value> = hash
+                .iter()
+                .map(|(k, v)| {
+                    let key = match k {
+                        Yaml::String(s) => s.clone(),
+                        _ => "INVALID_KEY".to_string(),
+                    };
+                    (key, yaml_to_serde(v))
+                })
+                .collect();
+            Value::Object(obj)
+        }
+        Yaml::Alias(_) => Value::Null,
+        Yaml::BadValue => Value::Null,
+    }
+}

backend/server/Cargo.toml

@@ -0,0 +1,29 @@
+[package]
+name = "server"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+macros = { path = "../macros" }
+markdown = { path = "../markdown" }
+
+axum = { version = "0.8.1", features = ["macros"] }
+tracing = { version = "0.1.41", features = ["log"] }
+git2 = "0.20.0"
+chrono = { version = "0.4.39", features = ["serde"] }
+cron = "0.15.0"
+sqlx = { version = "0.8.3", features = ["runtime-tokio", "tls-native-tls", "postgres", "chrono"] }
+serde_json = "1.0.133"
+serde = { version = "1.0.215", features = ["derive"] }
+tracing-subscriber = "0.3.18"
+tracing-appender = "0.2.3"
+dirs = "6.0.0"
+thiserror = "2.0.11"
+tokio = { version = "1.42.0", features = ["rt", "rt-multi-thread", "macros"] }
+dotenv = "0.15.0"
+uuid = { version = "1.13.2", features = ["v4"] }
+futures = "0.3.31"
+
+[build-dependencies]
+git2 = "0.20.0"
+chrono = "0.4.39"

backend/server/build.rs

@@ -0,0 +1,16 @@
+use chrono::Utc;
+use git2::Repository;
+
+fn main() {
+    let repo = Repository::open("../..").expect("failed to open repository");
+    let commit = repo
+        .head()
+        .expect("failed to get HEAD")
+        .peel_to_commit()
+        .expect("failed to get HEAD commit");
+    let hash = commit.id().to_string();
+    let utc_timestamp = Utc::now().date_naive().format("%Y%m%d").to_string();
+    let pkg_version = env!("CARGO_PKG_VERSION");
+    let build_id = format!("{}:{}@{}", pkg_version, &hash[..8], utc_timestamp);
+    println!("cargo:rustc-env=BUILD_ID={}", build_id);
+}

backend/server/src/constants/blog.rs

@@ -0,0 +1 @@
+pub const PAGE_SIZE: u32 = 6;

backend/server/src/constants/config.rs

@@ -0,0 +1,48 @@
+// Database related
+pub mod database {
+    pub mod var_name {
+        pub const URI: &str = "DATABASE_URL";
+        pub const USERNAME: &str = "POSTGRES_USER";
+        pub const PASSWORD: &str = "POSTGRES_PASSWORD";
+        pub const HOST: &str = "POSTGRES_HOST";
+        pub const PORT: &str = "POSTGRES_PORT";
+        pub const DBNAME: &str = "POSTGRES_DB";
+    }
+
+    pub mod default_value {
+        pub const USERNAME: &str = "";
+        pub const PASSWORD: &str = "";
+        pub const HOST: &str = "localhost";
+        pub const PORT: &str = "5432";
+        pub const DBNAME: &str = "nocturne";
+        pub const DATABASE_TYPE: &str = "postgresql";
+    }
+}
+
+pub mod server {
+    pub mod var_name {
+        pub const PORT: &str = "BACKEND_PORT";
+        pub const HOST: &str = "BACKEND_HOST";
+    }
+
+    pub mod default_value {
+        pub const PORT: u32 = 3001;
+        pub const HOST: &str = "0.0.0.0";
+    }
+}
+
+pub mod general {
+    pub mod var_name {
+        pub const LOG_DIR: &str = "LOG_DIR";
+        pub const WORK_DIR: &str = "WORK_DIR";
+        pub const BLOG_GIT_URL: &str = "BLOG_GIT_URL";
+        pub const BLOG_GIT_REMOTE_BRANCH: &str = "BLOG_GIT_REMOTE_BRANCH";
+        pub const BLOG_GIT_REMOTE_NAME: &str = "BLOG_GIT_REMOTE_NAME";
+    }
+
+    pub mod default_value {
+        pub const WORK_DIR: &str = "~/.nocturne";
+        pub const BLOG_GIT_REMOTE_BRANCH: &str = "master";
+        pub const BLOG_GIT_REMOTE_NAME: &str = "origin";
+    }
+}

backend/server/src/constants/mod.rs

@@ -0,0 +1,3 @@
+pub mod blog;
+pub mod config;
+pub mod time;

backend/server/src/constants/time.rs

@@ -0,0 +1,2 @@
+pub const DEFAULT_TIME_FORMAT: &str = "%Y-%m-%dT%H:%M:%S%z";
+pub const DEFAULT_DATE_FORMAT: &str = "%Y-%m-%d%zT%H%M%S";

backend/server/src/init/database.rs

@@ -0,0 +1,42 @@
+use std::env;
+use std::error::Error;
+use std::str::FromStr;
+
+use crate::constants::config::database::{default_value, var_name};
+
+use sqlx::postgres::{PgConnectOptions, PgPoolOptions};
+use sqlx::{ConnectOptions, Pool, Postgres};
+use tracing::info;
+
+pub async fn init() -> Result<Pool<Postgres>, Box<dyn Error>> {
+    let db_connect_option = PgConnectOptions::from_str(&parse_db_uri())
+        .unwrap()
+        .disable_statement_logging();
+    Ok(PgPoolOptions::new()
+        .max_connections(1) // todo: temporary solution, to be fixed
+        .connect_with(db_connect_option)
+        .await?)
+}
+
+fn parse_db_uri() -> String {
+    env::var(var_name::URI).unwrap_or_else(|_| {
+        info!(
+            "`{}` env var is not set, \
+            using `{}`, `{}`, `{}`, `{}` and `{}`",
+            var_name::URI,
+            var_name::USERNAME,
+            var_name::PASSWORD,
+            var_name::HOST,
+            var_name::PORT,
+            var_name::DBNAME
+        );
+        let postgres_user = env::var(var_name::USERNAME).unwrap_or(default_value::USERNAME.into());
+        let postgres_password =
+            env::var(var_name::PASSWORD).unwrap_or(default_value::PASSWORD.into());
+        let db_host = env::var(var_name::HOST).unwrap_or(default_value::HOST.into());
+        let db_port = env::var(var_name::PORT).unwrap_or(default_value::PORT.into());
+        let postgres_db = env::var(var_name::DBNAME).unwrap_or(default_value::DBNAME.into());
+        let db_type = default_value::DATABASE_TYPE;
+        format!("{db_type}://{postgres_user}:{postgres_password}@{db_host}:{db_port}/{postgres_db}")
+    })
+}

backend/server/src/init/logger.rs

@@ -0,0 +1,107 @@
+use std::path::Path;
+use std::{env, io};
+
+use crate::constants::config::general::{default_value, var_name};
+
+use chrono::Local;
+use dirs::home_dir;
+use tracing::info;
+use tracing_appender::{non_blocking, non_blocking::WorkerGuard, rolling};
+use tracing_subscriber::{
+    Layer, Registry, filter::LevelFilter, fmt, fmt::MakeWriter, fmt::format::Writer,
+    fmt::time::FormatTime, layer::SubscriberExt,
+};
+
+struct LocalTimer;
+
+impl FormatTime for LocalTimer {
+    fn format_time(&self, w: &mut Writer<'_>) -> std::fmt::Result {
+        write!(
+            w,
+            "{}",
+            Local::now().format(crate::constants::time::DEFAULT_TIME_FORMAT)
+        )
+    }
+}
+
+type _LogWriter = dyn for<'writer> MakeWriter<'writer, Writer = dyn io::Write + 'static> + 'static;
+
+pub fn init() -> (WorkerGuard, WorkerGuard) {
+    let log_path = match env::var(var_name::LOG_DIR) {
+        Ok(path) => Path::new(&path).to_path_buf(),
+        Err(_) => {
+            let path = if let Ok(default_log_path) = env::var(var_name::WORK_DIR) {
+                expand_home_path(default_log_path)
+            } else {
+                let fallback_path = expand_home_path(default_value::WORK_DIR.to_string());
+                println!(
+                    "[warn] unset env var `{}` and `{}`, trying to log on fallback path: {}/log",
+                    var_name::LOG_DIR,
+                    var_name::WORK_DIR,
+                    fallback_path
+                );
+                fallback_path
+            };
+            Path::new(&path).join("log")
+        }
+    };
+
+    let (info_log_writer, info_guard) = non_blocking(rolling::never(&log_path, "info.log"));
+    let (err_log_writer, error_guard) = non_blocking(rolling::never(&log_path, "error.log"));
+
+    let info_format = tracing_subscriber::fmt::format()
+        .with_level(true)
+        .with_target(true)
+        .with_source_location(true)
+        .with_ansi(false);
+    let err_format = tracing_subscriber::fmt::format()
+        .with_level(true)
+        .with_target(true)
+        .with_source_location(true)
+        .with_ansi(false);
+    let stdout_format = tracing_subscriber::fmt::format()
+        .with_level(true)
+        .with_target(true)
+        .with_source_location(true)
+        .with_timer(LocalTimer);
+
+    let subscribers = Registry::default()
+        .with(
+            fmt::Layer::default()
+                .with_writer(info_log_writer)
+                .event_format(info_format),
+        )
+        .with(
+            fmt::Layer::default()
+                .with_writer(err_log_writer)
+                .event_format(err_format)
+                .with_filter(LevelFilter::ERROR),
+        )
+        .with(
+            fmt::Layer::default()
+                .with_writer(io::stdout)
+                .with_ansi(true)
+                .event_format(stdout_format),
+        );
+
+    tracing::subscriber::set_global_default(subscribers)
+        .expect("[fatal] failed to setup logging system");
+
+    info!("logging to dir: {}", log_path.to_str().unwrap());
+
+    (info_guard, error_guard)
+}
+
+fn expand_home_path(path: String) -> String {
+    if path.starts_with('~') {
+        let home_path = home_dir()
+            .unwrap_or_else(|| panic!("[fatal] unable to locate home dir when parsing env `{}`, try to use absolute path instead", var_name::WORK_DIR));
+        home_path
+            .join(path.strip_prefix("~/").unwrap())
+            .into_os_string()
+            .into_string()
+            .unwrap()
+    } else {
+        path
+    }
+}

backend/server/src/init/misc.rs

@@ -0,0 +1,14 @@
+use git2::opts::{set_server_connect_timeout_in_milliseconds, set_server_timeout_in_milliseconds};
+use tracing::warn;
+
+pub fn init() {
+    // git2 option
+    unsafe {
+        if let Err(e) = set_server_connect_timeout_in_milliseconds(10_000) {
+            warn!("failed to set git2 server connect timeout: {}", e);
+        }
+        if let Err(e) = set_server_timeout_in_milliseconds(60_000) {
+            warn!("failed to set git2 server timeout: {}", e);
+        }
+    }
+}

backend/server/src/init/mod.rs

@@ -0,0 +1,50 @@
+mod database;
+pub mod logger;
+mod misc;
+
+use std::{env, panic};
+
+use crate::modules::{ModuleTree, blog::Blog};
+use macros::error_panic;
+
+use tracing::info;
+
+pub fn load_env() {
+    if let Some(env_file) = env::args().nth(1) {
+        match dotenv::from_filename(&env_file) {
+            Ok(_) => {
+                println!("[info] env loaded from {}, starting up", env_file);
+            }
+            Err(e) => {
+                panic!("[fatal] failed to read {}: {}", env_file, e);
+            }
+        }
+    } else {
+        println!("[info] no .env file referred, starting up")
+    }
+}
+
+pub async fn start() {
+    misc::init();
+
+    // connect database
+    let db_pool = match database::init().await {
+        Ok(pool) => {
+            info!("database connection pool initialized");
+            pool
+        }
+        Err(e) => {
+            error_panic!("database connection pool failed to initialize: {}", e);
+        }
+    };
+
+    // // schema init
+    // schema::init(&db_pool).await;
+
+    ModuleTree::new()
+        .add_module(Blog {
+            db_handler: db_pool,
+        })
+        .blocking_serve()
+        .await
+}

backend/server/src/main.rs

@@ -0,0 +1,23 @@
+#[allow(dead_code)]
+mod constants;
+
+#[allow(dead_code)]
+mod scheduler;
+
+mod init;
+mod modules;
+mod utils;
+
+use crate::init::{logger, start};
+
+const BUILD_ID: &str = env!("BUILD_ID");
+
+#[tokio::main]
+async fn main() {
+    println!("{}", BUILD_ID);
+
+    init::load_env();
+    let _guards = logger::init();
+
+    start().await;
+}

backend/server/src/modules/blog/api/get_page_count/mod.rs

@@ -0,0 +1,25 @@
+use crate::constants::blog::PAGE_SIZE;
+
+use axum::{Json, extract::State};
+use serde_json::{Value, json};
+use sqlx::{PgPool, Row, query};
+use tracing::error;
+
+const GET_PAGE_COUNT_QUERY: &str = include_str!("post_page_count.sql");
+
+pub async fn handler(State(db_connection): State<PgPool>) -> Result<Json<Value>, Json<Value>> {
+    match query(GET_PAGE_COUNT_QUERY)
+        .bind(PAGE_SIZE as i64)
+        .fetch_one(&db_connection)
+        .await
+    {
+        Ok(res) => {
+            let res: i32 = res.get("count");
+            Ok(Json::from(json!({"res": res})))
+        }
+        Err(e) => {
+            error!("failed to get blog page count: {}", e.to_string());
+            Err(Json::from(json!({"error": e.to_string()})))
+        }
+    }
+}

backend/server/src/modules/blog/api/get_page_count/post_page_count.sql

@@ -0,0 +1,2 @@
+SELECT cast(ceil(count(*) / cast($1 AS FLOAT)) AS INTEGER) AS count
+FROM posts;

backend/server/src/modules/blog/api/get_post/mod.rs

@@ -0,0 +1,34 @@
+use macros::dev_consume;
+
+use axum::{
+    extract::{Path, State},
+    response::IntoResponse,
+    Json,
+};
+use serde_json::json;
+use sqlx::PgPool;
+
+const GET_POST_BY_I64_ID: &str = include_str!("get_post_by_i64_id.sql");
+const GET_POST_BY_STR_ID: &str = include_str!("get_post_by_str_id.sql");
+
+pub async fn handler(
+    State(db_connection): State<PgPool>,
+    Path(identifier): Path<String>,
+) -> impl IntoResponse {
+    if let Ok(id) = identifier.parse::<i64>() {
+        select_post_with_i64_id(&db_connection, id).await
+    } else {
+        select_post_with_str_id(&db_connection, &identifier).await
+    };
+    Json::from(json!({"res": "ok"})).into_response()
+}
+
+async fn select_post_with_i64_id(db: &PgPool, id: i64) {
+    dev_consume!(db, id);
+    todo!()
+}
+
+async fn select_post_with_str_id(db: &PgPool, id: &str) {
+    dev_consume!(db, id);
+    todo!()
+}

backend/server/src/modules/blog/api/get_post_list.rs

@@ -0,0 +1,130 @@
+use std::error::Error;
+
+use crate::constants::blog::PAGE_SIZE;
+
+use axum::{extract::Query, extract::State, http::StatusCode, Json};
+use chrono::{DateTime, Utc};
+use futures::future::join_all;
+use serde::Deserialize;
+use serde_json::{json, Map, Value};
+use sqlx::{postgres::PgRow, query, PgPool, Row};
+use tracing::error;
+use uuid::Uuid;
+
+#[derive(Deserialize)]
+pub struct Params {
+    page: Option<u32>,
+}
+
+#[axum::debug_handler]
+pub async fn get_post_list(
+    State(db_connection): State<PgPool>,
+    Query(params): Query<Params>,
+) -> Result<Json<Value>, (StatusCode, Json<Value>)> {
+    let search_param_page = params.page.unwrap_or(1);
+    if search_param_page < 1 {
+        return Err((
+            StatusCode::BAD_REQUEST,
+            Json::from(json!({"error": "`page` should be greater than 0"})),
+        ));
+    }
+
+    let offset = PAGE_SIZE * (search_param_page - 1);
+
+    let post_list = sqlx::query("SELECT * FROM post ORDER BY first_update DESC LIMIT $1 OFFSET $2")
+        .bind(PAGE_SIZE as i32)
+        .bind(offset as i32)
+        .fetch_all(&db_connection)
+        .await;
+    let post_list = match post_list {
+        Ok(post_list) => post_list,
+        Err(e) => {
+            error!(
+                "Database query error on fetching post list: {}",
+                e.to_string()
+            );
+            return Err((
+                StatusCode::INTERNAL_SERVER_ERROR,
+                Json::from(json!({"error": e.to_string()})),
+            ));
+        }
+    };
+
+    let mut res = Vec::new();
+    let posts: Vec<_> = post_list
+        .into_iter()
+        .map(|post| async { analyze_post(&db_connection, post).await })
+        .collect();
+    let posts = join_all(posts).await;
+    for post in posts {
+        match post {
+            Ok(p) => res.push(p),
+            Err(e) => {
+                return Err((
+                    StatusCode::INTERNAL_SERVER_ERROR,
+                    Json::from(json!(("error", e.to_string()))),
+                ))
+            }
+        }
+    }
+
+    // res.insert("posts".to_string(), Value::from(posts));
+    Ok(Json::from(Value::from(res)))
+}
+
+async fn analyze_post(db_connection: &PgPool, post: PgRow) -> Result<Value, Box<dyn Error + Send>> {
+    let post_id: Uuid = post.get("post_id");
+    let tags = fetch_post_tags(db_connection, post_id).await;
+    let meta = fetch_post_meta(db_connection, post_id).await.unwrap();
+    let header_img = meta.get("header_img");
+    let last_update = meta.get("last_update");
+
+    Ok(json!({
+        "post_id": post_id.to_string(),
+        "title": post.get::<String, _>("title"),
+        "category": post.get::<String, _>("category"),
+        "header_img": header_img,
+        "sub_title": post.get::<String, _>("sub_title"),
+        "summary": post.get::<String, _>("summary"),
+        "last_update": last_update,
+        "first_update": post.get::<DateTime<Utc>, _>("first_update"),
+        "tags": tags,
+    }))
+}
+
+async fn fetch_post_meta(db_connection: &PgPool, post_id: Uuid) -> Option<Value> {
+    match query(
+        r#"
+SELECT jsonb_strip_nulls(to_jsonb(t.*)) - 'post_id' AS meta
+FROM meta t
+WHERE post_id = $1;
+        "#,
+    )
+    .bind(post_id)
+    .fetch_one(db_connection)
+    .await
+    {
+        Ok(value) => Some(value.get::<Value, _>("meta")),
+        Err(e) => {
+            error!(
+                "Database error on Reading `{}` from table `{}`: <{}>: {}",
+                "post meta data",
+                "meta",
+                post_id.to_string(),
+                e.to_string()
+            );
+            None
+        }
+    }
+}
+
+async fn fetch_post_tags(db_connection: &PgPool, post_id: Uuid) -> Vec<String> {
+    match query("SELECT tag FROM Tag WHERE post_id = $1")
+        .bind(post_id)
+        .fetch_all(db_connection)
+        .await
+    {
+        Ok(res) => res.iter().map(|tag| tag.get::<String, _>("tag")).collect(),
+        Err(_) => vec![],
+    }
+}

backend/server/src/modules/blog/api/mod.rs

@@ -0,0 +1,6 @@
+pub mod get_page_count;
+
+// todo: remove exception tag
+#[allow(dead_code)]
+pub mod get_post;
+// pub mod get_post_list;

backend/server/src/modules/blog/components/check_update/error.rs

@@ -0,0 +1,49 @@
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum PostIdxError {
+    #[error("missing essential field `{}` for file `{}`", field, filename)]
+    MissingField { field: String, filename: String },
+
+    #[error(
+        "invalid field `{}` for file `{}`, <{}>: {}",
+        field_name,
+        filename,
+        err_field,
+        msg
+    )]
+    InvalidField {
+        field_name: String,
+        err_field: String,
+        filename: String,
+        msg: String,
+    },
+
+    #[error(
+        "database error on writing `{}` to table `{}`: <{}>: {}",
+        data_desc,
+        db_table,
+        id,
+        msg
+    )]
+    DBWriteFailure {
+        data_desc: String,
+        db_table: String,
+        id: String,
+        msg: String,
+    },
+
+    #[error(
+        "Database error on Reading `{}` from table `{}`: <{}>: {}",
+        data_desc,
+        db_table,
+        id,
+        msg
+    )]
+    DBReadFailure {
+        data_desc: String,
+        db_table: String,
+        id: String,
+        msg: String,
+    },
+}

backend/server/src/modules/blog/components/check_update/index.rs

@@ -0,0 +1,351 @@
+use std::error::Error;
+use std::path::Path;
+
+use markdown::MdFile;
+
+use crate::modules::blog::components::check_update::utils::get_md_file_basename;
+use crate::modules::blog::components::check_update::{error::PostIdxError, utils::parse_date};
+use sqlx::{query, PgPool, Pool, Postgres, Row};
+use tokio::runtime::Runtime;
+use tracing::{info, warn};
+
+async fn base(db_connection: &PgPool, post: &MdFile) -> Result<(), PostIdxError> {
+    let post_id = post.file_id;
+    let title = match post.meta.get("title") {
+        None => {
+            return Err(PostIdxError::MissingField {
+                field: "title".to_string(),
+                filename: post.filename.clone(),
+            });
+        }
+        Some(title) => title.as_str().unwrap_or_else(|| {
+            warn!("invalid title for `{}`", &post.filename);
+            "invalid title"
+        }),
+    };
+    let sub_title = post
+        .meta
+        .get("sub_title")
+        .and_then(|v| v.as_str())
+        .unwrap_or("");
+    let summary = post
+        .meta
+        .get("summary")
+        .and_then(|v| v.as_str())
+        .unwrap_or("");
+    let content = post.content.as_str();
+    let category = match post.meta.get("category") {
+        None => {
+            return Err(PostIdxError::MissingField {
+                field: "category".to_string(),
+                filename: post.filename.clone(),
+            });
+        }
+        Some(title) => title.as_str().unwrap_or_else(|| {
+            warn!("invalid category for `{}`", &post.filename);
+            "invalid category"
+        }),
+    };
+    let last_update = {
+        if let Some(last_update) = post.meta.get("last_update") {
+            match parse_date(last_update.as_str().unwrap()) {
+                Ok(date) => Some(date),
+                Err(e) => {
+                    return Err(PostIdxError::InvalidField {
+                        field_name: "last_update".to_string(),
+                        err_field: last_update.to_string(),
+                        filename: post.filename.clone(),
+                        msg: e.to_string(),
+                    });
+                }
+            }
+        } else {
+            None
+        }
+    };
+    let first_update = match post.meta.get("date") {
+        None => {
+            return Err(PostIdxError::MissingField {
+                field: "date".to_string(),
+                filename: post.filename.clone(),
+            });
+        }
+        Some(first_update) => match parse_date(first_update.as_str().unwrap()) {
+            Ok(date) => date,
+            Err(e) => {
+                return Err(PostIdxError::InvalidField {
+                    field_name: "date".to_string(),
+                    err_field: first_update.to_string(),
+                    filename: post.filename.clone(),
+                    msg: e.to_string(),
+                });
+            }
+        },
+    };
+    let filename = get_md_file_basename(&post.filename);
+
+    if let Err(e) = query(
+        r##"
+INSERT INTO Post (post_id, title, summary, content, last_update, first_update, sub_title, category, filename)
+VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)
+ON CONFLICT (post_id) DO
+UPDATE SET
+    title = EXCLUDED.title,
+    summary = EXCLUDED.summary,
+    content = EXCLUDED.content,
+    last_update = EXCLUDED.last_update,
+    first_update = EXCLUDED.first_update,
+    sub_title = EXCLUDED.sub_title,
+    category = EXCLUDED.category,
+    filename = EXCLUDED.filename;
+        "##,
+    )
+        .bind(post_id)
+        .bind(title)
+        .bind(summary)
+        .bind(content)
+        .bind(last_update)
+        .bind(first_update)
+        .bind(sub_title)
+        .bind(category)
+        .bind(filename)
+        .execute(db_connection)
+        .await
+    {
+        return Err(
+            PostIdxError::DBWriteFailure {
+                data_desc: "post base information".to_string(),
+                db_table: "Post".to_string(),
+                id: post_id.to_string(),
+                msg: e.to_string(),
+            }
+        );
+    }
+    Ok(())
+}
+
+async fn tag(db_connection: &PgPool, post: &MdFile) -> Result<(), PostIdxError> {
+    if let Some(tags_string) = post.meta.get("tags").to_owned() {
+        let tags = match tags_string.as_array().map(|vec| {
+            vec.iter()
+                .map(|val| val.as_str().unwrap())
+                .collect::<Vec<_>>()
+        }) {
+            None => {
+                return Err(PostIdxError::MissingField {
+                    field: "tags".to_string(),
+                    filename: post.filename.clone(),
+                });
+            }
+            Some(val) => val,
+        };
+
+        let post_id = post.file_id;
+
+        // remove old record
+        if let Err(e) = query("DELETE FROM Tag WHERE post_id = $1")
+            .bind(post_id)
+            .execute(db_connection)
+            .await
+        {
+            return Err(PostIdxError::DBWriteFailure {
+                data_desc: "post tag information".to_string(),
+                db_table: "Tag".to_string(),
+                id: post_id.to_string(),
+                msg: e.to_string(),
+            });
+        }
+
+        // add new record
+        for tag in tags {
+            match query("INSERT INTO Tag VALUES ($1, $2);")
+                .bind(post_id)
+                .bind(tag)
+                .execute(db_connection)
+                .await
+            {
+                Ok(_) => {}
+                Err(e) => {
+                    return Err(PostIdxError::DBWriteFailure {
+                        data_desc: "post tag information".to_string(),
+                        db_table: "Tag".to_string(),
+                        id: post_id.to_string(),
+                        msg: e.to_string(),
+                    });
+                }
+            }
+        }
+    }
+
+    Ok(())
+}
+
+async fn hash(db_connection: &PgPool, post: &MdFile) -> Result<bool, PostIdxError> {
+    let base64_form = post.hash.clone();
+    match query("SELECT hash FROM Hash WHERE post_id = $1")
+        .bind(post.file_id)
+        .fetch_optional(db_connection)
+        .await
+    {
+        Ok(row) => {
+            let db_record: String = match row {
+                None => "".to_string(),
+                Some(row) => row.try_get("hash").unwrap_or("".to_string()),
+            };
+            if base64_form == db_record {
+                Ok(false)
+            } else {
+                if let Err(e) = query(
+                    r#"
+INSERT INTO Hash (post_id, hash) VALUES ($1, $2)
+    ON CONFLICT (post_id) DO UPDATE SET hash = EXCLUDED.hash"#,
+                )
+                .bind(post.file_id)
+                .bind(&base64_form)
+                .execute(db_connection)
+                .await
+                {
+                    return Err(PostIdxError::DBWriteFailure {
+                        data_desc: "post hash".to_string(),
+                        db_table: "Hash".to_string(),
+                        id: post.file_id.to_string(),
+                        msg: e.to_string(),
+                    });
+                }
+                Ok(true)
+            }
+        }
+        Err(e) => Err(PostIdxError::DBReadFailure {
+            data_desc: "post hash".to_string(),
+            db_table: "Hash".to_string(),
+            id: post.file_id.to_string(),
+            msg: e.to_string(),
+        }),
+    }
+}
+
+async fn meta(db_connection: &PgPool, post: &MdFile) -> Result<(), PostIdxError> {
+    if let Err(e) = query(
+        // todo: sanitization
+        format!(
+            r#"
+DO
+$$
+    DECLARE
+        _post_id        UUID  := '{}';
+        _meta_cols      JSONB := '{}';
+        _exists         BOOLEAN;
+        _col_name       TEXT;
+        _col_value      TEXT;
+        _sql            TEXT;
+        _insert_columns TEXT  := 'post_id';
+        _insert_values  TEXT  := quote_literal(_post_id);
+        _update_set     TEXT  := '';
+        _blacklist      TEXT[] := ARRAY['tags'];
+    BEGIN
+        SELECT EXISTS(SELECT 1 FROM meta WHERE post_id = _post_id) INTO _exists;
+
+        FOR _col_name, _col_value IN SELECT key, value FROM jsonb_each_text(_meta_cols)
+            LOOP
+                IF _col_name = ANY(_blacklist) THEN
+                    CONTINUE;
+                END IF;
+
+                IF NOT EXISTS (SELECT 1
+                               FROM information_schema.columns
+                               WHERE table_name = 'meta'
+                                 AND column_name = _col_name
+                                 -- may change in the future
+                                 AND table_schema = 'public') THEN
+                    _sql := 'ALTER TABLE meta ADD COLUMN ' || quote_ident(_col_name) || ' TEXT';
+                    EXECUTE _sql;
+                END IF;
+                _insert_columns := _insert_columns || ', ' || quote_ident(_col_name);
+                _insert_values := _insert_values || ', ' || quote_literal(_col_value);
+                _update_set := _update_set || ', ' || quote_ident(_col_name) || ' = ' || quote_literal(_col_value);
+            END LOOP;
+
+        _update_set := substring(_update_set FROM 3);
+
+        IF _exists THEN
+            _sql := 'UPDATE meta SET ' || _update_set || ' WHERE post_id = ' || quote_literal(_post_id);
+            EXECUTE _sql;
+        ELSE
+            _sql := 'INSERT INTO meta (' || _insert_columns || ') VALUES (' || _insert_values || ')';
+            EXECUTE _sql;
+        END IF;
+    END;
+$$ LANGUAGE plpgsql;
+        "#, post.file_id.to_string().as_str(), post.meta
+        ).as_str()
+    )
+        .execute(db_connection)
+        .await {
+        Err(PostIdxError::DBWriteFailure {
+            data_desc: "post meta data".to_string(),
+            db_table: "Meta".to_string(),
+            id: post.file_id.to_string(),
+            msg: e.to_string(),
+        })
+    } else {
+        Ok(())
+    }
+}
+
+pub async fn index_file(path: &Path, db_conn: &Pool<Postgres>) -> Result<(), Box<dyn Error>> {
+    let md_file = MdFile::from_file(path)?;
+
+    async fn trail(db_conn: &Pool<Postgres>, md_file: &MdFile) -> Result<(), PostIdxError> {
+        base(db_conn, md_file).await?;
+        tag(db_conn, md_file).await?;
+        meta(db_conn, md_file).await?;
+        hash(db_conn, md_file).await.map(|_| ())
+    }
+    let mut cnt = 5;
+
+    while let Err(e) = trail(db_conn, &md_file).await {
+        match e {
+            PostIdxError::DBWriteFailure { .. } => {
+                cnt -= 1;
+            }
+            PostIdxError::DBReadFailure { .. } => {
+                cnt -= 1;
+            }
+            _ => return Err(e.into()),
+        }
+        if cnt <= 0 {
+            return Err(e.into());
+        }
+    }
+
+    info!("indexed markdown file: {}", path.display());
+    Ok(())
+}
+
+pub fn drop_index(file_basename: &str, db_conn: &Pool<Postgres>) -> Result<(), Box<dyn Error>> {
+    let rt = Runtime::new().unwrap();
+    rt.block_on(async {
+        if let Err(e) = query(
+            r#"
+WITH deleted_post AS (
+    DELETE FROM post
+    WHERE id = (SELECT id FROM post WHERE filename = $1)
+    RETURNING id
+)
+DELETE FROM tag WHERE post_id IN (SELECT id FROM deleted_post);
+DELETE FROM meta WHERE post_id IN (SELECT id FROM deleted_post);
+DELETE FROM hash WHERE post_id IN (SELECT id FROM deleted_post);
+    "#,
+        )
+        .bind(file_basename)
+        .execute(db_conn)
+        .await
+        {
+            Err(Box::from(
+                format!("failed to drop index: {}", e).to_string(),
+            ))
+        } else {
+            Ok(())
+        }
+    })
+}

backend/server/src/modules/blog/components/check_update/mod.rs

@@ -0,0 +1,78 @@
+use crate::constants::config::general::{default_value, var_name};
+use macros::panic_with_log;
+use std::sync::Arc;
+use std::{
+    env,
+    path::{Path, PathBuf},
+};
+
+use crate::modules::blog::components::check_update::{
+    // index::drop_index,
+    // utils::{expand_path, index_files, search_md},
+    utils::expand_path,
+};
+use crate::scheduler::task_func::AsyncTaskFunc;
+use sqlx::PgPool;
+use tracing::{info, warn, Level};
+
+// mod error;
+// mod index;
+mod utils;
+
+#[derive(Debug)]
+struct Args {
+    git_work_dir: PathBuf,
+    git_url: String,
+    git_remote_name: String,
+    git_remote_branch: String,
+}
+
+pub fn task(db_connection: PgPool) -> impl AsyncTaskFunc {
+    // init
+    let git_work_dir = {
+        let path = if let Ok(default_log_path) = env::var(var_name::WORK_DIR) {
+            expand_path(default_log_path)
+        } else {
+            let fallback_path = expand_path(default_value::WORK_DIR.to_string());
+            warn!(
+                "unset env var `{}`, using default path: {}/blog_git",
+                var_name::WORK_DIR,
+                fallback_path
+            );
+            fallback_path
+        };
+        Path::new(&path).join("blog_git")
+    };
+
+    // clone & check update
+
+    let git_url = match env::var(var_name::BLOG_GIT_URL) {
+        Ok(url) => url,
+        Err(e) => {
+            panic_with_log!(
+                Level::ERROR,
+                "failed to read `{}`: {}",
+                var_name::BLOG_GIT_URL,
+                e
+            )
+        }
+    };
+    let git_remote_name = env::var(var_name::BLOG_GIT_REMOTE_NAME)
+        .unwrap_or(default_value::BLOG_GIT_REMOTE_NAME.to_string());
+    let git_remote_branch = env::var(var_name::BLOG_GIT_REMOTE_BRANCH)
+        .unwrap_or(default_value::BLOG_GIT_REMOTE_BRANCH.to_string());
+
+    let arc_args = Arc::new(Args {
+        git_work_dir,
+        git_url,
+        git_remote_name,
+        git_remote_branch,
+    });
+
+    move || Box::pin(test(arc_args.clone()))
+}
+
+async fn test(args: Arc<Args>) {
+    info!("test");
+    dbg!(&args);
+}

backend/server/src/modules/blog/components/check_update/utils.rs

@@ -0,0 +1,81 @@
+use crate::constants::{
+    config::general::{default_value, var_name},
+    time::DEFAULT_DATE_FORMAT,
+};
+
+// use crate::modules::blog::components::check_update::index::index_file;
+use chrono::{DateTime, FixedOffset, ParseResult};
+use dirs::home_dir;
+use tracing::warn;
+
+// pub fn search_md(entry: PathBuf) -> Vec<PathBuf> {
+//     if entry.ends_with(".git") {
+//         return vec![];
+//     }
+//     if entry.is_dir() {
+//         if let Ok(files) = entry.read_dir() {
+//             files
+//                 .flat_map(|file| {
+//                     let file_path = file.unwrap().path();
+//                     search_md(file_path)
+//                 })
+//                 .collect()
+//         } else {
+//             vec![]
+//         }
+//     } else if entry.extension().is_some_and(|ext| ext == "md") {
+//         vec![entry]
+//     } else {
+//         vec![]
+//     }
+// }
+
+// pub fn index_files(files: &[PathBuf], db_conn: &Pool<Postgres>) {
+//     let rt = Runtime::new().unwrap();
+//     rt.block_on(async {
+//         let files_clone = files.to_owned();
+//         let handlers = files_clone
+//             .into_iter()
+//             .map(|file: PathBuf| {
+//                 let conn_clone = db_conn.clone();
+//                 spawn(async move {
+//                     if let Err(e) = index_file(&file, &conn_clone).await {
+//                         error!("failed to index markdown file `{}`: {}", file.display(), e);
+//                     }
+//                 })
+//             })
+//             .collect::<Vec<_>>();
+//
+//         block_on(join_all(handlers));
+//     });
+// }
+
+pub fn expand_path(path: String) -> String {
+    if path.starts_with('~') {
+        home_dir()
+            .map(|dir| {
+                dir.join(path.strip_prefix("~/").unwrap())
+                    .into_os_string()
+                    .into_string()
+                    .unwrap()
+            })
+            .unwrap_or_else(|| {
+                warn!(
+                    "failed to parse env var `{}`, using default value `{}`",
+                    var_name::WORK_DIR,
+                    default_value::WORK_DIR
+                );
+                default_value::WORK_DIR.to_string()
+            })
+    } else {
+        path
+    }
+}
+
+pub fn parse_date(date_str: &str) -> ParseResult<DateTime<FixedOffset>> {
+    DateTime::parse_from_str(format!("{}T120000", date_str).as_str(), DEFAULT_DATE_FORMAT)
+}
+
+// pub fn get_md_file_basename(f_name: &str) -> String {
+//     f_name.replace(".md", "")
+// }

backend/server/src/modules/blog/components/mod.rs

@@ -0,0 +1,2 @@
+pub mod check_update;
+mod rag;

backend/server/src/modules/blog/mod.rs

@@ -0,0 +1,58 @@
+mod api;
+mod components;
+
+use crate::{
+    modules::{
+        blog::{
+            api::{
+                get_page_count,
+                get_post,
+                // get_post_list::get_post_list,
+            },
+            // cron::check_update,
+        },
+        Module,
+    },
+    scheduler::tasks::CronTask,
+};
+
+use crate::modules::blog::components::check_update;
+use crate::scheduler::tasks::async_basic::AsyncBasic;
+use crate::scheduler::tasks::basic::BasicTask;
+use axum::{routing::get, Router};
+use sqlx::PgPool;
+
+const MOUNT_POINT: &str = "/blog";
+
+pub struct Blog {
+    pub db_handler: PgPool,
+}
+
+impl Module for Blog {
+    fn get_server_router(&self) -> Router {
+        let db_handler = self.db_handler.clone();
+        // todo: move resource init to new func
+        // todo: remove debug comment
+        Router::new()
+            // .route("/get_post_list", get(get_post_list))
+            .route("/get_page_count", get(get_page_count::handler))
+            .route("/get_post/{identifier}", get(get_post::handler))
+            .with_state(db_handler)
+    }
+
+    fn get_mount_point(&self) -> &'static str {
+        MOUNT_POINT
+    }
+
+    fn get_cron_tasks(&self) -> Vec<Box<dyn CronTask>> {
+        let db_handler = self.db_handler.clone();
+        vec![
+            AsyncBasic::new(check_update::task(db_handler.clone()), "* * * * * *")
+                .unwrap()
+                .to_task(),
+            BasicTask::new(|| println!("test lol"), "* * * * * *")
+                .unwrap()
+                .to_task(),
+        ]
+    }
+}

backend/server/src/modules/blog/schema.sql

@@ -0,0 +1,41 @@
+CREATE TABLE tags
+(
+    id          SERIAL PRIMARY KEY,
+    name        VARCHAR(20) UNIQUE NOT NULL,
+    description TEXT
+);
+
+CREATE TABLE categories
+(
+    id          SERIAL PRIMARY KEY,
+    name        VARCHAR(20) UNIQUE NOT NULL,
+    description TEXT
+);
+
+CREATE TABLE posts
+(
+    id             SERIAL PRIMARY KEY,
+    identifier     VARCHAR(50) UNIQUE                NOT NULL,
+    title          VARCHAR(255)                      NOT NULL,
+    subtitle       VARCHAR(255)                      NOT NULL,
+    published_date DATE                              NOT NULL,
+    last_update    DATE,
+    content        TEXT                              NOT NULL,
+
+    category       SERIAL REFERENCES categories (id) NOT NULL
+);
+
+CREATE TABLE post_tag
+(
+    post SERIAL REFERENCES posts (id),
+    tag  SERIAL REFERENCES tags (id)
+);
+
+CREATE TABLE metadata
+(
+    pid        SERIAL REFERENCES posts (id) NOT NULL,
+    meta_key   VARCHAR(50)                  NOT NULL,
+    meta_value TEXT                         NOT NULL,
+
+    CONSTRAINT meta_pk PRIMARY KEY (pid, meta_key)
+);

backend/server/src/modules/mod.rs

@@ -0,0 +1,85 @@
+pub mod blog;
+
+use std::{env, num::ParseIntError, thread};
+
+use crate::{
+    constants::config::server::{default_value, var_name},
+    scheduler::{tasks::CronTask, Scheduler},
+};
+use macros::error_panic;
+
+use axum::Router;
+use futures::executor::block_on;
+use tokio::net::TcpListener;
+use tracing::{info, warn};
+
+// todo: merge `get_server_router` & `get_mount_point`, make Option
+pub trait Module {
+    fn get_server_router(&self) -> Router;
+
+    fn get_mount_point(&self) -> &'static str;
+
+    fn get_cron_tasks(&self) -> Vec<Box<dyn CronTask>>;
+}
+
+pub struct ModuleTree {
+    pub modules: Vec<Box<dyn Module>>,
+}
+
+impl ModuleTree {
+    pub fn new() -> Self {
+        ModuleTree { modules: vec![] }
+    }
+
+    pub fn add_module(&mut self, module: impl Module + 'static) -> &mut Self {
+        self.modules.push(Box::new(module));
+        self
+    }
+
+    pub async fn blocking_serve(&self) {
+        let scheduler = Scheduler::new();
+        let mut app = Router::new();
+
+        let port: u32 = match env::var(var_name::PORT) {
+            Ok(value) => value.parse().unwrap_or_else(|e: ParseIntError| {
+                warn!(
+                    "failed to parse `{}`, using default port: {}",
+                    var_name::PORT,
+                    e.to_string()
+                );
+                default_value::PORT
+            }),
+            Err(_) => default_value::PORT,
+        };
+
+        let listener = match TcpListener::bind(format!("{}:{}", default_value::HOST, port)).await {
+            Ok(listener) => {
+                info!("server started on {}:{}", default_value::HOST, port);
+                listener
+            }
+            Err(e) => {
+                error_panic!(
+                    "failed to start server on {}:{}: {}",
+                    default_value::HOST,
+                    port,
+                    e.to_string()
+                );
+            }
+        };
+
+        for module in &self.modules {
+            let _ = scheduler.insert_list(module.get_cron_tasks()).await;
+            app = app.nest(module.get_mount_point(), module.get_server_router());
+        }
+
+        let _ = thread::spawn(move || {
+            let fut = scheduler.start();
+            block_on(fut).unwrap()
+        })
+        .join();
+
+        axum::serve(listener, app).await.unwrap_or_else(|e| {
+            error_panic!("failed to start axum: {}", e.to_string());
+        });
+    }
+}

backend/server/src/scheduler/error.rs

@@ -0,0 +1,48 @@
+use std::{
+    error::Error,
+    fmt::{Debug, Display, Formatter},
+    sync::PoisonError,
+};
+
+use crate::scheduler::error::SchedulerError::MutexPoison;
+
+// todo: refactor with thiserror
+pub enum SchedulerError {
+    IdNotFound,
+    IdAlreadyRunning,
+    MutexPoison(String),
+}
+
+impl<T> From<PoisonError<T>> for SchedulerError {
+    fn from(value: PoisonError<T>) -> Self {
+        MutexPoison(value.to_string())
+    }
+}
+
+impl Debug for SchedulerError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self)
+    }
+}
+
+impl Display for SchedulerError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}",
+            match self {
+                SchedulerError::IdNotFound => {
+                    "SchedulerError::IdNotFound".to_string()
+                }
+                SchedulerError::IdAlreadyRunning => {
+                    "SchedulerError::IdAlreadyRunning".to_string()
+                }
+                MutexPoison(str) => {
+                    format!("SchedulerError::MutexPoison: {}", str)
+                }
+            }
+        )
+    }
+}
+
+impl Error for SchedulerError {}

backend/server/src/scheduler/mod.rs

@@ -0,0 +1,145 @@
+use std::{
+    collections::{HashMap, HashSet},
+    sync::Arc,
+};
+
+use crate::scheduler::{
+    error::{SchedulerError, SchedulerError::IdNotFound},
+    runner::Runner,
+    tasks::CronTask,
+};
+
+use tokio::sync::RwLock;
+use uuid::Uuid;
+
+pub mod error;
+mod runner;
+mod sleeper;
+pub mod task_func;
+pub mod tasks;
+
+#[derive(Default)]
+pub struct Scheduler {
+    running: RwLock<HashSet<Uuid>>,
+    parking_pool: RwLock<HashMap<Uuid, Arc<Box<dyn CronTask>>>>,
+    runner: Runner,
+}
+
+impl Scheduler {
+    /// Start all tasks in the scheduler
+    pub async fn start(&self) -> Result<(), SchedulerError> {
+        self.runner.run_all().await
+    }
+
+    /// Terminate all tasks in the scheduler
+    pub async fn halt(&self) -> Result<(), SchedulerError> {
+        for id in self.running.read().await.iter() {
+            let func = &self.runner.terminate_remove(*id).await?;
+            self.running.write().await.remove(id);
+            self.parking_pool.write().await.insert(*id, func.clone());
+        }
+        Ok(())
+    }
+
+    /// Run a task with `id`
+    pub async fn run(&self, id: &Uuid) -> Result<(), SchedulerError> {
+        if self.running.read().await.contains(id) {
+            Ok(())
+        } else if self.parking_pool.read().await.contains_key(id) {
+            let func = self.parking_pool.write().await.remove(id).unwrap();
+            self.running.write().await.insert(*id);
+            self.runner.add_with_id(func, id).await?;
+            self.runner.run_id(id).await
+        } else {
+            Err(IdNotFound)
+        }
+    }
+
+    /// Stop a task with `id`
+    pub async fn stop(&self, id: &Uuid) -> Result<(), SchedulerError> {
+        if self.running.read().await.contains(id) {
+            let func = self.runner.terminate_remove(*id).await?;
+            self.running.write().await.remove(id);
+            self.parking_pool.write().await.insert(*id, func.clone());
+            Ok(())
+        } else if self.parking_pool.read().await.get(id).is_some() {
+            Ok(())
+        } else {
+            Err(IdNotFound)
+        }
+    }
+
+    // pub fn now(&self, id: &Uuid) -> Result<(), SchedulerError> {
+    // }
+
+    pub async fn insert(&self, task: Box<dyn CronTask>) -> Result<Uuid, SchedulerError> {
+        let id = self.runner.add(task.into()).await?;
+        self.running.write().await.insert(id);
+        Ok(id)
+    }
+
+    pub async fn insert_list(
+        &self,
+        tasks: Vec<Box<dyn CronTask>>,
+    ) -> Result<Vec<Uuid>, SchedulerError> {
+        let ids = self
+            .runner
+            .add_list(tasks.into_iter().map(|t| t.into()).collect())
+            .await?;
+        self.running.write().await.extend(&ids);
+        Ok(ids)
+    }
+
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
+// #[cfg(test)]
+// mod tests {
+//     use std::{error::Error, thread, time::Duration};
+//
+//     use crate::scheduler::{
+//         tasks::{async_basic::AsyncBasic, basic::BasicTask},
+//         Scheduler,
+//     };
+//
+//     use uuid::Uuid;
+//
+//     async fn execution(scheduler: Scheduler, id: Uuid) -> Result<(), Box<dyn Error>> {
+//         for i in 1..=2 {
+//             println!("Loop {} start", i);
+//             println!("Run {}", i);
+//             scheduler.run(&id).await?;
+//             println!("Sleep {}", i);
+//             thread::sleep(Duration::from_secs(4));
+//             println!("Sleep {} finished", i);
+//             scheduler.stop(&id)?;
+//             println!("Stop {}", i);
+//             thread::sleep(Duration::from_secs(2));
+//             println!("Loop {} finished", i);
+//         }
+//         Ok(())
+//     }
+//
+//     #[tokio::test]
+//     async fn test_run() -> Result<(), Box<dyn Error>> {
+//         let scheduler = Scheduler::default();
+//         let task = BasicTask::new(|| println!("test print"), "* * * * * *")?;
+//         let id = scheduler.insert(Box::new(task)).await?;
+//         scheduler.start().await?;
+//         execution(scheduler, id)
+//     }
+//
+//     #[tokio::test]
+//     async fn test_run_async() -> Result<(), Box<dyn Error>> {
+//         let scheduler = Scheduler::default();
+//         let task = AsyncBasic::new(
+//             || Box::pin(async { println!("test async print") }),
+//             "* * * * * *",
+//         )?;
+//         let id = scheduler.insert(Box::new(task)).await?;
+//         scheduler.start().await?;
+//         execution(scheduler, id)
+//     }
+// }

backend/server/src/scheduler/runner.rs

@@ -0,0 +1,186 @@
+use crate::scheduler::{
+    error::{SchedulerError, SchedulerError::IdNotFound},
+    sleeper::SkippableSleeper,
+    tasks::CronTask,
+};
+use futures::future;
+use std::{
+    collections::HashMap,
+    sync::{
+        atomic::{AtomicBool, Ordering},
+        Arc,
+    },
+};
+
+use tokio::runtime::Runtime;
+use tokio::sync::RwLock;
+use uuid::Uuid;
+
+#[derive(Debug)]
+struct TaskStatus {
+    sleeper: RwLock<SkippableSleeper>,
+    is_running: AtomicBool,
+    expected_running: AtomicBool,
+}
+
+pub struct TaskEntity {
+    func: Arc<Box<dyn CronTask>>,
+    status: TaskStatus,
+}
+
+impl TaskEntity {
+    pub fn new(func: Arc<Box<dyn CronTask>>) -> Self {
+        let next_execution: SkippableSleeper = func.get_next_execution().unwrap().into();
+        Self {
+            func,
+            status: TaskStatus {
+                sleeper: next_execution.into(),
+                is_running: false.into(),
+                expected_running: true.into(),
+            },
+        }
+    }
+
+    pub async fn run_blocking(&self) {
+        dbg!("entered");
+        dbg!("chkpt 1");
+        loop {
+            dbg!("chkpt 2");
+            // deadlock spotted
+            self.status.sleeper.read().await.start().await;
+            dbg!("chkpt 3");
+            if self.status.expected_running.load(Ordering::SeqCst) {
+                dbg!("chkpt 4");
+                self.func.call().await;
+                dbg!("chkpt 5");
+                if let Some(next_execution) = self.func.get_next_execution() {
+                    dbg!("chkpt 6a");
+                    *(self.status.sleeper.write().await) = next_execution.into();
+                } else {
+                    dbg!("chkpt 6b");
+                    self.status.is_running.store(false, Ordering::SeqCst);
+                    break;
+                }
+            } else {
+                break;
+            }
+        }
+    }
+
+    pub async fn terminate(&self) {
+        self.status.expected_running.store(false, Ordering::SeqCst);
+        self.status.is_running.store(false, Ordering::SeqCst);
+        self.status.sleeper.read().await.skip();
+    }
+}
+
+pub struct Runner {
+    task_list: RwLock<HashMap<Uuid, Arc<TaskEntity>>>,
+    rt: Runtime,
+}
+
+impl Runner {
+    pub fn new() -> Self {
+        Self {
+            task_list: HashMap::new().into(),
+            rt: Runtime::new().unwrap(),
+        }
+    }
+
+    pub async fn run_all(&self) -> Result<(), SchedulerError> {
+        let list = &self.task_list.read().await;
+        self.rt.block_on(async {
+            for (_, entity) in list.iter() {
+                self.run_entity(entity.clone()).await
+            }
+        });
+        Ok(())
+    }
+
+    pub async fn run_id(&self, id: &Uuid) -> Result<(), SchedulerError> {
+        if let Some(entity) = self.task_list.read().await.get(id).cloned() {
+            self.rt.block_on(async { self.run_entity(entity).await });
+            Ok(())
+        } else {
+            Err(IdNotFound)
+        }
+    }
+
+    pub async fn run_entity(&self, entity: Arc<TaskEntity>) {
+        if !entity.status.is_running.load(Ordering::SeqCst)
+            && entity.status.expected_running.load(Ordering::SeqCst)
+        {
+            entity.status.is_running.store(true, Ordering::SeqCst);
+            let fut = {
+                let entity_clone = entity.clone();
+                async move { entity_clone.run_blocking().await }
+            };
+            dbg!("spawn");
+            tokio::spawn(fut);
+        }
+    }
+
+    pub async fn add_with_id(
+        &self,
+        task: Arc<Box<dyn CronTask>>,
+        id: &Uuid,
+    ) -> Result<(), SchedulerError> {
+        self.task_list
+            .write()
+            .await
+            .insert(*id, TaskEntity::new(task).into());
+        Ok(())
+    }
+
+    pub async fn add(&self, task: Arc<Box<dyn CronTask>>) -> Result<Uuid, SchedulerError> {
+        let id = Uuid::new_v4();
+        self.add_with_id(task, &id).await?;
+        Ok(id)
+    }
+
+    pub async fn add_list_with_id(
+        &self,
+        tasks: Vec<(&Uuid, Arc<Box<dyn CronTask>>)>,
+    ) -> Result<(), SchedulerError> {
+        let fut = tasks
+            .into_iter()
+            .map(async |(id, entity)| self.add_with_id(entity, id).await)
+            .collect::<Vec<_>>();
+        future::join_all(fut).await.into_iter().collect()
+    }
+
+    pub async fn add_list(
+        &self,
+        tasks: Vec<Arc<Box<dyn CronTask>>>,
+    ) -> Result<Vec<Uuid>, SchedulerError> {
+        let fut = tasks
+            .into_iter()
+            .map(async |task| {
+                let id = Uuid::new_v4();
+                self.add_with_id(task, &id).await.map(move |_| id)
+            })
+            .collect::<Vec<_>>();
+        future::join_all(fut).await.into_iter().collect()
+    }
+
+    pub async fn terminate_remove(
+        &self,
+        id: Uuid,
+    ) -> Result<Arc<Box<dyn CronTask>>, SchedulerError> {
+        let mut list = self.task_list.write().await;
+        match list.get(&id) {
+            None => Err(IdNotFound),
+            Some(task) => {
+                task.terminate().await;
+                let func = list.remove(&id).unwrap().func.clone();
+                Ok(func.clone())
+            }
+        }
+    }
+}
+
+impl Default for Runner {
+    fn default() -> Self {
+        Self::new()
+    }
+}

backend/server/src/scheduler/sleeper.rs

@@ -0,0 +1,81 @@
+use chrono::{DateTime, Utc};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::{sync::Arc, time::Duration};
+use tokio::sync::Notify;
+
+#[derive(Debug, Clone)]
+pub struct SkippableSleeper {
+    duration: Duration,
+    skipped: Arc<AtomicBool>,
+    notify: Arc<Notify>,
+}
+
+impl SkippableSleeper {
+    pub fn new(duration: Duration) -> Self {
+        Self {
+            duration,
+            skipped: Arc::new(AtomicBool::new(false)),
+            notify: Arc::new(Notify::new()),
+        }
+    }
+
+    pub async fn start(&self) {
+        if self.skipped.load(Ordering::Acquire) {
+            return;
+        }
+
+        let sleep = tokio::time::sleep(self.duration);
+        let notify = self.notify.notified();
+
+        tokio::select! {
+            _ = sleep => {}
+            _ = notify => {
+                self.skipped.store(true, Ordering::Release);
+            }
+        }
+    }
+
+    pub fn skip(&self) {
+        self.notify.notify_waiters();
+    }
+}
+
+impl From<DateTime<Utc>> for SkippableSleeper {
+    fn from(value: DateTime<Utc>) -> Self {
+        let now = Utc::now();
+        let duration = value.signed_duration_since(now);
+        let duration = duration.to_std().unwrap_or(Duration::ZERO);
+        Self::new(duration)
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use tokio::time::{sleep, Duration};
+
+    #[tokio::test]
+    async fn skip_sleeper() {
+        let sleeper = SkippableSleeper::new(Duration::from_secs(10));
+        let sleeper_clone = sleeper.clone();
+
+        let handle = tokio::spawn(async move {
+            println!("Sleeping...");
+            sleeper_clone.start().await;
+            println!("Woke up!");
+        });
+
+        println!("Start waiting...");
+        sleep(Duration::from_secs(4)).await;
+        println!("Skipping sleep...");
+        sleeper.skip();
+
+        handle.await.unwrap();
+    }
+
+    #[tokio::test]
+    async fn normal_sleeper() {
+        let sleeper = SkippableSleeper::new(Duration::from_secs(4));
+        sleeper.start().await;
+    }
+}

backend/server/src/scheduler/task_func.rs

@@ -0,0 +1,15 @@
+use std::pin::Pin;
+
+pub trait TaskFunc: Fn() + Send + Sync + 'static {}
+
+impl<T> TaskFunc for T where T: Fn() + Send + Sync + Clone + 'static {}
+
+pub trait AsyncTaskFunc:
+    Fn() -> Pin<Box<dyn Future<Output = ()> + Send>> + Send + Sync + 'static
+{
+}
+
+impl<T> AsyncTaskFunc for T where
+    T: Fn() -> Pin<Box<dyn Future<Output = ()> + Send>> + Send + Sync + Clone + 'static
+{
+}

backend/server/src/scheduler/tasks/async_basic.rs

@@ -0,0 +1,37 @@
+use std::{error::Error, pin::Pin, str::FromStr};
+
+use crate::{scheduler::task_func::AsyncTaskFunc, scheduler::tasks::CronTask};
+
+use chrono::{DateTime, Utc};
+use cron::Schedule;
+
+pub struct AsyncBasic {
+    schedule: Schedule,
+    func: Box<dyn AsyncTaskFunc>,
+}
+
+impl AsyncBasic {
+    pub fn new<F>(func: F, cron_expr: &str) -> Result<Self, Box<dyn Error>>
+    where
+        F: AsyncTaskFunc,
+    {
+        Ok(AsyncBasic {
+            schedule: Schedule::from_str(cron_expr)?,
+            func: Box::new(func),
+        })
+    }
+
+    pub fn to_task(self) -> Box<dyn CronTask> {
+        Box::new(self)
+    }
+}
+
+impl CronTask for AsyncBasic {
+    fn get_next_execution(&self) -> Option<DateTime<Utc>> {
+        self.schedule.upcoming(Utc).next()
+    }
+
+    fn call(&self) -> Pin<Box<(dyn Future<Output = ()> + Send)>> {
+        Box::pin((self.func)())
+    }
+}

backend/server/src/scheduler/tasks/basic.rs

@@ -0,0 +1,37 @@
+use std::{error::Error, pin::Pin, str::FromStr};
+
+use crate::scheduler::{task_func::TaskFunc, tasks::CronTask};
+
+use chrono::{DateTime, Utc};
+use cron::Schedule;
+
+pub struct BasicTask {
+    schedule: Schedule,
+    func: Box<dyn TaskFunc>,
+}
+
+impl BasicTask {
+    pub fn new<F>(func: F, cron_expr: &str) -> Result<Self, Box<dyn Error>>
+    where
+        F: TaskFunc,
+    {
+        Ok(BasicTask {
+            schedule: Schedule::from_str(cron_expr)?,
+            func: Box::new(func),
+        })
+    }
+
+    pub fn to_task(self) -> Box<dyn CronTask> {
+        Box::new(self)
+    }
+}
+
+impl CronTask for BasicTask {
+    fn get_next_execution(&self) -> Option<DateTime<Utc>> {
+        self.schedule.upcoming(Utc).next()
+    }
+
+    fn call(&self) -> Pin<Box<dyn Future<Output = ()> + Send + '_>> {
+        Box::pin(async { (self.func)() })
+    }
+}

backend/server/src/scheduler/tasks/mod.rs

@@ -0,0 +1,11 @@
+use std::pin::Pin;
+
+use chrono::{DateTime, Utc};
+
+pub mod async_basic;
+pub mod basic;
+
+pub trait CronTask: Send + Sync {
+    fn get_next_execution(&self) -> Option<DateTime<Utc>>;
+    fn call(&self) -> Pin<Box<dyn Future<Output = ()> + Send + '_>>;
+}

backend/server/src/utils/git.rs

@@ -0,0 +1,160 @@
+/// git merge
+/// based on https://github.com/rust-lang/git2-rs/blob/master/examples/pull.rs
+/// https://github.com/rust-lang/git2-rs/commit/f3b87baed1e33d6c2d94fe1fa6aa6503a071d837
+///
+use git2::{
+    build, AnnotatedCommit, AutotagOption, Delta, FetchOptions, Reference, Remote, Repository,
+};
+use std::path::PathBuf;
+use tracing::{error, warn};
+
+
+#[derive(Debug, Eq, PartialEq)]
+pub struct FileDelta {
+    pub old_path: Option<PathBuf>,
+    pub new_path: Option<PathBuf>,
+    pub status: Delta,
+}
+
+fn do_fetch<'a>(
+    repo: &'a Repository,
+    refs: &[&str],
+    remote: &'a mut Remote,
+) -> Result<AnnotatedCommit<'a>, git2::Error> {
+    let mut fetch_option = FetchOptions::new();
+
+    fetch_option.download_tags(AutotagOption::All);
+    remote.fetch(refs, Some(&mut fetch_option), None)?;
+
+    let fetch_head = repo.find_reference("FETCH_HEAD")?;
+    repo.reference_to_annotated_commit(&fetch_head)
+}
+
+fn fast_forward(
+    repo: &Repository,
+    lb: &mut Reference,
+    rc: &AnnotatedCommit,
+) -> Result<(), git2::Error> {
+    let name = match lb.name() {
+        Some(s) => s.to_string(),
+        None => String::from_utf8_lossy(lb.name_bytes()).to_string(),
+    };
+    let msg = format!("fast-forward({}) -> {}", name, rc.id());
+    // println!("{}", msg);
+    lb.set_target(rc.id(), &msg)?;
+    repo.set_head(&name)?;
+    repo.checkout_head(Some(build::CheckoutBuilder::default().force()))?;
+    Ok(())
+}
+
+fn normal_merge(
+    repo: &Repository,
+    local: &AnnotatedCommit,
+    remote: &AnnotatedCommit,
+) -> Result<(), git2::Error> {
+    let local_tree = repo.find_commit(local.id())?.tree()?;
+    let remote_tree = repo.find_commit(remote.id())?.tree()?;
+    let ancestor = repo
+        .find_commit(repo.merge_base(local.id(), remote.id())?)?
+        .tree()?;
+    let mut idx = repo.merge_trees(&ancestor, &local_tree, &remote_tree, None)?;
+
+    if idx.has_conflicts() {
+        warn!("merge conflicts detected");
+        repo.checkout_index(Some(&mut idx), None)?;
+        return Ok(());
+    }
+    let result_tree = repo.find_tree(idx.write_tree_to(repo)?)?;
+
+    let msg = format!("merge({}) -> {}", remote.id(), local.id());
+    let sig = repo.signature()?;
+    let local_commit = repo.find_commit(local.id())?;
+    let remote_commit = repo.find_commit(remote.id())?;
+
+    let _merge_commit = repo.commit(
+        Some("HEAD"),
+        &sig,
+        &sig,
+        &msg,
+        &result_tree,
+        &[&local_commit, &remote_commit],
+    )?;
+    repo.checkout_head(None)?;
+    Ok(())
+}
+
+fn do_merge<'a>(
+    repo: &'a Repository,
+    remote_branch: &str,
+    fetch_commit: AnnotatedCommit<'a>,
+) -> Result<Vec<FileDelta>, git2::Error> {
+    let analysis = repo.merge_analysis(&[&fetch_commit])?;
+    let head_commit = repo.reference_to_annotated_commit(&repo.head()?)?;
+
+    if analysis.0.is_fast_forward() {
+        let ref_name = format!("refs/heads/{}", remote_branch);
+        match repo.find_reference(&ref_name) {
+            Ok(mut r) => {
+                fast_forward(repo, &mut r, &fetch_commit)?;
+            }
+            Err(_) => {
+                repo.reference(
+                    &ref_name,
+                    fetch_commit.id(),
+                    true,
+                    &format!("({}) -> {}", remote_branch, fetch_commit.id()),
+                )?;
+                repo.set_head(&ref_name)?;
+                repo.checkout_head(Some(
+                    build::CheckoutBuilder::default()
+                        .allow_conflicts(true)
+                        .conflict_style_merge(true)
+                        .force(),
+                ))?;
+            }
+        };
+    } else if analysis.0.is_normal() {
+        normal_merge(repo, &head_commit, &fetch_commit)?;
+    }
+    calculate_diff(repo, &head_commit, &fetch_commit)
+}
+
+fn calculate_diff(
+    repo: &Repository,
+    local: &AnnotatedCommit,
+    remote: &AnnotatedCommit,
+) -> Result<Vec<FileDelta>, git2::Error> {
+    let local_tree = repo.find_commit(local.id())?.tree()?;
+    let remote_tree = repo.find_commit(remote.id())?.tree()?;
+    let diff = repo.diff_tree_to_tree(Some(&local_tree), Some(&remote_tree), None)?;
+
+    let mut updated_files: Vec<FileDelta> = Vec::new();
+
+    if let Err(e) = diff.foreach(
+        &mut |d, _| {
+            updated_files.push(FileDelta {
+                old_path: d.old_file().path().map(PathBuf::from),
+                new_path: d.new_file().path().map(PathBuf::from),
+                status: d.status(),
+            });
+            true
+        },
+        None,
+        None,
+        None,
+    ) {
+        error!("error at calculating diff: {:?}", e);
+    }
+
+    Ok(updated_files.into_iter().collect())
+}
+
+pub fn sync(
+    remote_name: &str,
+    remote_branch: &str,
+    repo: &Repository,
+) -> Result<Vec<FileDelta>, git2::Error> {
+    let mut remote = repo.find_remote(remote_name)?;
+    let fetch_commit = do_fetch(repo, &[remote_branch], &mut remote)?;
+    do_merge(repo, remote_branch, fetch_commit)
+}

backend/server/src/utils/mod.rs

@@ -0,0 +1 @@
+pub mod git;

components/Navbar.tsx

@@ -1,116 +0,0 @@
-'use client';
-
-import React, { useEffect, useState } from 'react';
-import {
-    Image,
-    Navbar as NextUINavbar,
-    NavbarBrand,
-    NavbarContent,
-    NavbarItem,
-    NavbarMenu,
-    NavbarMenuItem,
-    NavbarMenuToggle
-} from '@nextui-org/react';
-import Link from 'next/link';
-import { usePathname } from 'next/navigation';
-import ThemeSwitcher from '@/components/ThemeSwitcher';
-
-
-const entries: { display_name: string; href: string; }[] = [
-    {
-        display_name: 'Home',
-        href: '/'
-    },
-    {
-        display_name: 'About',
-        href: '/about'
-    },
-    {
-        display_name: 'Blog',
-        href: '/blog'
-    }
-];
-
-function Navbar() {
-    const [ scrolled, setScrolled ] = useState(false);
-
-    useEffect(() => {
-        const handleScroll = () => {
-            const isScrolled = window.scrollY > 0;
-            setScrolled(isScrolled);
-        };
-        window.addEventListener('scroll', handleScroll);
-        return () => {
-            window.removeEventListener('scroll', handleScroll);
-        };
-    }, []);
-
-
-    return (
-        <>
-            <NextUINavbar isBlurred isBordered>
-
-                <NavbarContent className="sm:hidden" justify="start">
-                    <NavbarMenuToggle />
-                </NavbarContent>
-
-                <NavbarContent className="sm:hidden pr-3" justify="center">
-                    <Image
-                        src={ 'https://avatars.githubusercontent.com/u/46409277?v=4' }
-                        alt={ 'avatar' }
-                        className={ 'rounded-full h-[3rem]' }
-                    ></Image>
-
-                    <NavbarBrand>
-                        <p className="font-bold text-inherit">{ 'Lumither\'s site' }</p>
-                    </NavbarBrand>
-                </NavbarContent>
-
-                <NavbarContent className="hidden sm:flex gap-4" justify="center">
-                    <Image
-                        src={ 'https://avatars.githubusercontent.com/u/46409277?v=4' }
-                        alt={ 'avatar' }
-                        className={ 'rounded-full h-[3rem]' }
-                    ></Image>
-
-                    <NavbarBrand>
-                        <p className="font-bold text-inherit">{ 'Lumither\'s site' }</p>
-                    </NavbarBrand>
-
-                    { entries.map((item, index) => (
-                        // eslint-disable-next-line react-hooks/rules-of-hooks
-                        <NavbarItem key={ index } isActive={ usePathname() === item.href }>
-                            <Link
-                                className="w-full"
-                                href={ item.href }
-                            >
-                                { item.display_name }
-                            </Link>
-                        </NavbarItem>
-                    )) }
-                </NavbarContent>
-
-                <NavbarContent justify="end">
-                    <NavbarItem>
-                        <ThemeSwitcher />
-                    </NavbarItem>
-                </NavbarContent>
-
-                <NavbarMenu>
-                    { entries.map((item, index) => (
-                        <NavbarMenuItem key={ index }>
-                            <Link
-                                className="w-full"
-                                href={ item.href }
-                            >
-                                { item.display_name }
-                            </Link>
-                        </NavbarMenuItem>
-                    )) }
-                </NavbarMenu>
-            </NextUINavbar>
-        </>
-    );
-}
-
-export default Navbar;

components/ThemeSwitcher.tsx

@@ -1,38 +0,0 @@
-'use client';
-
-import React, { useEffect, useState } from 'react';
-import { useTheme } from 'next-themes';
-import { Switch } from '@nextui-org/react';
-import { MdOutlineDarkMode, MdOutlineLightMode } from 'react-icons/md';
-
-function ThemeSwitcher() {
-    const [ mounted, setMounted ] = useState(false);
-    const { setTheme } = useTheme();
-
-    useEffect(() => {
-        setMounted(true);
-    }, []);
-
-    if (!mounted) {
-        return null;
-    }
-
-    return (
-        <div>
-            <Switch
-                color={ 'default' }
-                startContent={ <MdOutlineLightMode /> }
-                endContent={ <MdOutlineDarkMode /> }
-                onValueChange={ (isSelected) => {
-                    if (isSelected) {
-                        setTheme('light');
-                    } else {
-                        setTheme('dark');
-                    }
-                } }
-            ></Switch>
-        </div>
-    );
-}
-
-export default ThemeSwitcher;

container/dev/backend.containerfile

@@ -0,0 +1,9 @@
+FROM rust:latest
+
+WORKDIR /app
+
+COPY . .
+
+RUN cargo build
+
+CMD cargo r

container/dev/frontend.containerfile

@@ -0,0 +1,13 @@
+# docker/dev.Dockerfile
+FROM node:latest
+
+WORKDIR /app
+
+COPY package.json ./
+
+RUN npm install
+
+ENV NEXT_TELEMETRY_DISABLED 1
+
+CMD npm run dev
+

container/release/backend.containerfile

@@ -0,0 +1,10 @@
+FROM rust:latest AS builder
+WORKDIR /app
+COPY . .
+RUN ["cargo", "build", "-r"]
+
+FROM gcr.io/distroless/cc AS production
+ARG ARCH
+COPY --from=builder /app/target/release/api_server ./api_server
+COPY --from=builder /usr/lib/${ARCH}-linux-gnu/libz.so.1 /usr/lib/${ARCH}-linux-gnu/
+ENTRYPOINT ["./api_server"]

container/release/frontend.containerfile

@@ -0,0 +1,15 @@
+FROM node:22 AS builder
+WORKDIR /app
+ENV NEXT_TELEMETRY_DISABLED=1
+COPY package*.json ./
+RUN npm install
+COPY . .
+RUN npm run build
+
+FROM gcr.io/distroless/nodejs22 AS production
+ENV NEXT_TELEMETRY_DISABLED=1
+COPY --from=builder /app/next.config.mjs ./
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+ENV HOSTNAME="0.0.0.0"
+CMD ["./server.js"]

dev.compose.yaml

@@ -0,0 +1,36 @@
+services:
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: ../container/dev/frontend.containerfile
+    restart: always
+    ports:
+      - "3000:3000"
+    volumes:
+      - ./frontend:/app
+      - /app/node_modules
+      - /app/.next
+    env_file:
+      - ./container/dev/.env
+    dns:
+      - 1.1.1.1
+
+
+  backend:
+    build:
+      context: ./backend
+      dockerfile: ../container/dev/backend.containerfile
+    restart: always
+    ports:
+      - "3001:3001"
+    volumes:
+      - ./blog_posts_git:/app/blog_posts_git:ro
+    env_file:
+      - ./container/dev/.env
+  
+  postgres:
+    image: postgres:16.3
+    ports:
+      - 5432:5432
+    env_file:
+      - ./container/dev/.env

frontend/.dockerignore

@@ -0,0 +1,10 @@
+/node_modules
+
+/.next
+/out
+/build
+
+.DS_Store
+*.pem
+
+.env*.local

frontend/.gitignore

@@ -0,0 +1,43 @@
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+.yarn/install-state.gz
+
+# testing
+/coverage
+
+# next.js
+/.next/
+/out/
+
+# production
+/build
+
+# misc
+.DS_Store
+*.pem
+
+# debug
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# local env files
+.env*.local
+
+# vercel
+.vercel
+
+# typescript
+*.tsbuildinfo
+next-env.d.ts
+
+# bun
+bun.lockb
+
+# ide related
+.idea
+/package-lock.json

frontend/app/(pages)/about/layout.tsx

@@ -0,0 +1,21 @@
+import React from 'react';
+import { Metadata } from 'next';
+import { SITE_CONFIG } from '@/src/constants';
+
+export const metadata: Metadata = {
+    title: `About - ${ SITE_CONFIG.name }`
+};
+
+function Layout({
+    children
+}: {
+    children: React.ReactNode;
+}) {
+    return (
+        <div className={ 'flex p-7' }>
+            { children }
+        </div>
+    );
+}
+
+export default Layout;

frontend/app/(pages)/about/me/page.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+import MarkdownRenderer from '@/app/(pages)/public/MarkdownRenderer';
+import { fetchText } from '@/app/fetch';
+
+const Me = async () => {
+    return (
+        <div className={ 'p-5' }>
+            <MarkdownRenderer>
+                { await fetchText('https://raw.githubusercontent.com/lumither/blog-posts/master/about/me.md') }
+            </MarkdownRenderer>
+        </div>
+    );
+};
+
+export default Me;

frontend/app/(pages)/about/page.tsx

@@ -0,0 +1,58 @@
+import { Card } from '@nextui-org/react';
+import React from 'react';
+import { CardBody } from '@nextui-org/card';
+import Link from 'next/link';
+
+const About = () => {
+    return (
+        <div className={ `flex flex-col w-full justify-center align-middle h-dvh` }>
+            <div className={ 'md:relative md:h-[130px] mb-4 md:mb-0' }>
+                <div className={ 'md:relative md:left-[20%] flex flex-col w-fit' }>
+                    <p className={ 'text-pretty text-3xl' }>{ '讷，远道而来的' }<span
+                        className={ 'break-keep underline decoration-sky-400 dark:decoration-sky-700 decoration-4 underline-offset-0' }>旅人</span>
+                    </p>
+                    <p className={ 'text-pretty md:text-2xl mt-1 md:ml-4' }>{ '愿意坐下来听个故事吗...' }</p>
+                    <p className={ 'hidden md:block text-lg md:ml-8' }>{ '一个关于一位' }<span
+                        className={ 'text-gray-700 dark:text-gray-400 text-sm transition-colors' }>{ '█' }</span>{ '追寻' }<span
+                        className={ 'text-gray-700 dark:text-gray-400 text-sm transition-colors' }>{ '█' }</span>{ '，探索' }<span
+                        className={ 'text-gray-700 dark:text-gray-400 text-sm transition-colors' }>{ '█' }</span>{ '的故事' }
+                    </p>
+                </div>
+            </div>
+            <div className={ `flex justify-center w-full h-[60%] md:h-[40%]` }>
+                <div
+                    className={ `flex flex-col md:flex-row w-full md:w-[85%] lg:w-[90%] xl:w-[85%] p-4 gap-x-7 gap-y-5` }>
+                    <Card
+                        isHoverable
+                        className={ 'w-full h-[45%] md:h-full' }
+                        as={ Link }
+                        href={ '/about/me' }
+                        isPressable
+                    >
+                        <CardBody>
+                            <div className={ 'h-full flex flex-col justify-center' }>
+                                <p className={ 'text-center text-3xl h-fit' }>关于我</p>
+                            </div>
+                        </CardBody>
+                    </Card>
+                    <Card
+                        isHoverable
+                        className={ 'w-full h-[45%] md:h-full' }
+                        as={ Link }
+                        href={ '/about/website' }
+                        isPressable
+                    >
+                        <CardBody>
+                            <div className={ 'h-full flex flex-col justify-center' }>
+                                <p className={ 'text-center text-3xl h-fit' }>关于这个网站</p>
+                            </div>
+                        </CardBody>
+                    </Card>
+                </div>
+            </div>
+            <p className={ 'text-center' }>*目前还没想到如何设计这一页，先摸鱼会（笑）</p>
+        </div>
+    );
+};
+
+export default About;

frontend/app/(pages)/about/website/page.tsx

@@ -0,0 +1,14 @@
+import React from 'react';
+import MarkdownRenderer from '@/app/(pages)/public/MarkdownRenderer';
+import { fetchText } from '@/app/fetch';
+
+const Website = async () => {
+    return (
+        <div className={ 'p-5' }>
+            <MarkdownRenderer>
+                { await fetchText('https://raw.githubusercontent.com/lumither/blog-posts/master/about/website.md') }
+            </MarkdownRenderer>
+        </div>
+    );
+};
+export default Website;

frontend/app/(pages)/blog/BlogPostCard.tsx

@@ -0,0 +1,92 @@
+import React from 'react';
+import { Card, CardBody, CardFooter } from '@nextui-org/card';
+import { Chip } from '@nextui-org/react';
+import Image from 'next/image';
+import Link from 'next/link';
+import { MdCalendarMonth, MdNorthEast } from 'react-icons/md';
+
+type Props = {
+    post: JSON
+}
+
+function BlogPostCard({ post }: Props) {
+    let title = (post as any)['title'];
+    let sub_title = (post as any)['sub_title'];
+    // let summary = (post as any)['summary'];
+    let category = (post as any)['category'];
+    let tags = (post as any)['tags'];
+    // let last_update = new Date((post as any)['last_update']);
+    let first_update = new Date((post as any)['first_update']);
+    let post_id = (post as any)['post_id'];
+    let header_img = ((post as any)['header_img'] as string | null);
+
+    return (
+
+        <div className={ `w-full` }>
+            <Card as={ Link } href={ `/blog/post/${ post_id }` }
+                  className={ `group` }
+                  isPressable
+                  isHoverable
+            >
+
+                { header_img && <div className={ `w-full overflow h-80 relative` }>
+                    <Image
+                        alt={ 'cover picture' }
+                        src={ header_img }
+                        className={ `w-full object-cover rounded-b-none z-10` }
+                        loading={ 'eager' }
+                        fill
+                    ></Image>
+                    <Image
+                        alt={ 'cover picture shadow' }
+                        src={ header_img }
+                        loading={ 'eager' }
+                        className={ `w-full object-cover rounded-b-none scale-y-110 blur-2xl` }
+                        fill
+                    ></Image>
+                </div> }
+
+                <CardBody className={ `overflow-visible` }>
+                    <div className={ `flex flex-row justify-between` }>
+                        <div className={ `mx-2 ${ header_img ? '-mt-6' : 'mt-2' }` }>
+                            <Chip className={ `mb-2 z-30 text-lg` } radius={ `sm` } size={ 'lg' } color={ `secondary` }
+                                  variant={ `solid` }>{ category }</Chip>
+                            <p className={ `text-4xl font-bold` }> { title }</p>
+                            <p className={ `text-xl` }> { sub_title }</p>
+                        </div>
+                        <MdNorthEast className={ `mt-1 mr-2` } size={ `40px` } />
+                    </div>
+                </CardBody>
+
+                <CardFooter className={ 'pt-0' }>
+                    <div className={ `flex flex-row flex-wrap justify-between w-full` }>
+                        <div>
+                            <ul className={ `flex flex-row flex-wrap` }>
+                                {
+                                    tags.map((tag: string, key: any) => (
+                                        <li key={ key } className={ `mx-1 mb-1` }>
+                                            <Chip>{ tag }</Chip>
+                                        </li>
+                                    ))
+                                }
+                            </ul>
+                        </div>
+                        <div className={ `flex flex-row place-content-end mb-1 items-center mx-1` }>
+                            <MdCalendarMonth />
+                            <p className={ `text-zinc-500 dark:text-zinc-400 ml-1` }>
+                                { first_update.toLocaleString('default', {
+                                    month: `long`,
+                                    day: `numeric`,
+                                    year: `numeric`
+                                }) }
+                            </p>
+                        </div>
+                    </div>
+                </CardFooter>
+            </Card>
+        </div>
+    );
+
+}
+
+export default BlogPostCard;

frontend/app/(pages)/blog/Error.tsx

@@ -0,0 +1 @@
+// todo: create component

frontend/app/(pages)/blog/Pagination.tsx

@@ -0,0 +1,37 @@
+'use client';
+
+import React from 'react';
+import { Pagination as NextUIPagination } from '@nextui-org/react';
+import { useRouter, useSearchParams } from 'next/navigation';
+import { useScreenSizeTrigger } from '@/app/(pages)/public/screenSizeTrigger';
+
+const Pagination = ({ total }: {
+    total: number,
+}) => {
+    const parsePage = Number(useSearchParams().get('page'));
+    const currPage = parsePage > 0 ? parsePage : 1;
+
+    const router = useRouter();
+
+    const isMobile = useScreenSizeTrigger('md');
+
+    return (
+        <div className={ 'w-full p-4 pt-6 flex justify-center' }>
+            <NextUIPagination
+                initialPage={ currPage }
+                total={ total }
+                siblings={ isMobile ? 0 : 1 }
+                size={ isMobile ? 'sm' : 'md' }
+                showControls
+                showShadow
+                color={ 'default' }
+                variant={ 'light' }
+                onChange={ (page) => {
+                    router.push(`?page=${ page }`, { scroll: false });
+                } }
+            />
+        </div>
+
+    );
+};
+export default Pagination;

frontend/app/(pages)/blog/PostList.tsx

@@ -0,0 +1,43 @@
+'use server';
+
+import React from 'react';
+import { fetchNocturneApi } from '@/app/(pages)/blog/api';
+import BlogPostCard from '@/app/(pages)/blog/BlogPostCard';
+import { Card, CardBody } from '@nextui-org/card';
+
+import * as motion from 'motion/react-client';
+
+const PostList = async ({ page }: { page: number }) => {
+    try {
+        const res = await fetchNocturneApi(`/blog/get_post_list?page=${ page }`);
+        const posts = await res.json();
+        return (
+            // blog list
+            <div className={ 'w-full' }>
+                <ul className={ 'flex flex-col items-center w-full space-y-7' }>
+                    { posts.map((post: JSON, key: number) => (
+                        <li key={ key } className={ 'w-full' }>
+                            <motion.div
+                                initial={ { y: 20, opacity: 0 } }
+                                animate={ { y: 0, opacity: 1 } }
+                                transition={ { ease: 'easeInOut', duration: 0.5, delay: key * .2 + .25 } }
+                            >
+                                <BlogPostCard post={ post } />
+                            </motion.div>
+                        </li>)
+                    ) }
+                </ul>
+
+            </div>
+        );
+    } catch (e: any) {
+        return (
+            // todo:  use Error.tsx
+            <Card className={ `w-full` }>
+                <CardBody>
+                    Fatal: { e.toString() }
+                </CardBody>
+            </Card>);
+    }
+};
+export default PostList;

frontend/app/(pages)/blog/api.ts

@@ -0,0 +1,21 @@
+const LOCAL_ENDPOINT = process.env.API_LOCAL_URL;
+const REMOTE_ENDPOINT = process.env.API_REMOTE_URL;
+
+const NOCTURNE_ENDPOINT = ((isServerSide = true) => {
+    if (process.env.NODE_ENV === 'production') {
+        if (isServerSide) {
+            return LOCAL_ENDPOINT;
+        } else {
+            return REMOTE_ENDPOINT;
+        }
+    } else {
+        return LOCAL_ENDPOINT;
+    }
+});
+
+export async function fetchNocturneApi(path: string, isServerSideRequest = true) {
+    return await fetch(`${ NOCTURNE_ENDPOINT(isServerSideRequest) }${ path }`, {
+        cache: 'no-cache'
+    });
+}
+

frontend/app/(pages)/blog/layout.tsx

@@ -0,0 +1,23 @@
+import React from 'react';
+import { Metadata } from 'next';
+import { SITE_CONFIG } from '@/src/constants';
+
+export const metadata: Metadata = {
+    title: `Blog - ${ SITE_CONFIG.name }`
+};
+
+function Layout({
+    children
+}: {
+    children: React.ReactNode;
+}) {
+    return (
+        <div className={ 'flex flex-auto p-7 pl-2 lg:pl-7 w-full justify-center' }>
+            <main className={ 'w-full' }>
+                { children }
+            </main>
+        </div>
+    );
+}
+
+export default Layout;

frontend/app/(pages)/blog/page.tsx

@@ -0,0 +1,24 @@
+import PostList from '@/app/(pages)/blog/PostList';
+import Pagination from '@/app/(pages)/blog/Pagination';
+import { fetchNocturneApi } from '@/app/(pages)/blog/api';
+
+async function Blog({
+    searchParams
+}: {
+    searchParams: Promise<{ [key: string]: string | string[] | undefined }>
+}) {
+
+    const parsePage = Number((await searchParams)?.page);
+    const currPage = parsePage > 0 ? parsePage : 1;
+    const ret = await fetchNocturneApi(`/blog/get_page_count`);
+    const pageCount = (await ret.json() as any)['res'] as number;
+
+    return (
+        <div className={ 'w-full min-w-full space-y-4' }>
+            <PostList page={ currPage } />
+            <Pagination total={ pageCount } />
+        </div>
+    );
+}
+
+export default Blog;

frontend/app/(pages)/blog/post/[id]/ButtonGoBack.tsx

@@ -0,0 +1,21 @@
+'use client';
+
+import React from 'react';
+import { useRouter } from 'next/navigation';
+import { Button } from '@nextui-org/react';
+import { IoArrowBackOutline } from 'react-icons/io5';
+
+const ButtonGoBack = () => {
+    const router = useRouter();
+
+    return (
+        <Button
+            startContent={ <IoArrowBackOutline /> }
+            variant={ 'light' }
+            onClick={ () => router.back() }
+        >
+            { 'Back' }
+        </Button>
+    );
+};
+export default ButtonGoBack;

frontend/app/(pages)/blog/post/[id]/Footer.tsx

@@ -0,0 +1,104 @@
+import React from 'react';
+import MinifyPostCard from '@/app/(pages)/blog/post/[id]/MinifyPostCard';
+import Link from 'next/link';
+import { FaCreativeCommons } from 'react-icons/fa6';
+
+type Props = {
+    // post: any
+    post_id: string;
+    adjacent_posts: any
+    perm_link: string | undefined;
+    author: string | undefined;
+    author_link: string | undefined;
+    first_update: string;
+    last_update: string | undefined;
+    cc: string | undefined;
+    title: string;
+}
+
+const Footer = (props: Props) => {
+    const { adjacent_posts, perm_link, post_id, first_update, last_update, title } = props;
+
+    const prev_post = adjacent_posts.prev;
+    const next_post = adjacent_posts.next;
+    const link = perm_link ?? `https://lumither.com/blog/post/${ post_id }`;
+    const author = props.author ?? 'Tao';
+    const author_link = props.author_link ?? '/about/me';
+    const post_date = new Date(first_update);
+    const update_date: Date | undefined = last_update ? new Date(last_update) : undefined;
+    const cc = props.cc ?? 'by-nc-sa';
+
+
+    return (
+        <div className={ `w-full` }>
+
+            <div className={ 'flex transition bg-zinc-300/80 dark:bg-gray-600/25' }>
+                <div className={ `p-8 w-full overflow-hidden` }>
+                    <div className={ 'relative' }>
+                        <FaCreativeCommons
+                            size={ '160px' }
+                            className={ 'absolute right-0 top-0 -mt-[4.8rem] -mr-16 opacity-30 brightness-50  ' }
+                        />
+                    </div>
+
+                    <div className={ 'flex flex-col space-y-4 relative' }>
+                        <div className={ 'z-[2]' }>
+                            <p className={ 'text-xl font-bold' }>{ title }</p>
+                            <Link href={ link }>
+                                <p className={ 'text-sm underline decoration-indigo-500 dark:decoration-sky-500' }>{ link }</p>
+                            </Link>
+                        </div>
+                        <div className={ 'z-[2] flex flex-row flex-wrap gap-x-7 gap-y-2' }>
+                            <div>
+                                <p className={ 'text-lg font-bold' }>Author</p>
+                                <Link href={ author_link }>
+                                    <p className={ 'underline decoration-indigo-500 dark:decoration-sky-500' }>{ author }</p>
+                                </Link>
+                            </div>
+                            <div>
+                                <p className={ 'text-lg font-bold' }>Posted on</p>
+                                <p>{ post_date.toLocaleString('default', {
+                                    month: `long`,
+                                    day: `numeric`,
+                                    year: `numeric`
+                                }) }</p>
+                            </div>
+                            { update_date &&
+                                <div>
+                                    <p className={ 'text-lg font-bold' }>Updated on</p>
+                                    <p>{ update_date.toLocaleString('default', {
+                                        month: `long`,
+                                        day: `numeric`,
+                                        year: `numeric`
+                                    }) }</p>
+                                </div>
+                            }
+                            <div>
+                                <p className={ 'text-lg font-bold' }>Published under</p>
+                                <Link href={ `https://creativecommons.org/licenses/${ cc }/4.0/` }>
+                                    <p className={ 'underline decoration-indigo-500 dark:decoration-sky-500' }>{ `CC ${ cc.toUpperCase() } 4.0` }</p>
+                                </Link>
+                            </div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+
+            <div className={ `flex justify-center` }>
+                <div className={ `w-full shadow-2xl ` }>
+                    <div className={ `flex flex-col md:flex-row w-full` }>
+                        {
+                            next_post &&
+                            <MinifyPostCard post={ next_post } desc={ 'prev' }></MinifyPostCard>
+                        }
+                        {
+                            prev_post &&
+                            <MinifyPostCard post={ prev_post } desc={ 'next' }></MinifyPostCard>
+                        }
+                    </div>
+                </div>
+            </div>
+        </div>
+    );
+};
+export default Footer;

frontend/app/(pages)/blog/post/[id]/Headers.tsx

@@ -0,0 +1,80 @@
+import React from 'react';
+import Image from 'next/image';
+import { Chip } from '@nextui-org/react';
+import { MdCalendarMonth } from 'react-icons/md';
+
+// type Props = {
+//     post: any
+// };
+
+type Props = {
+    title: string;
+    subtitle: string;
+    summary: string | undefined;
+    category: string;
+    tags: string[];
+    first_update: string;
+    header_img: string | undefined;
+}
+
+
+const Headers = (post: Props) => {
+
+    return (
+        <>
+            { post.header_img && <div className={ `w-full overflow h-96 relative` }>
+                <Image
+                    alt={ 'cover picture' }
+                    src={ post.header_img }
+                    className={ `w-full object-cover rounded-b-none z-[5]` }
+                    fill
+                ></Image>
+                <Image
+                    alt={ 'cover picture' }
+                    src={ post.header_img }
+                    className={ `w-full relative scale-110 blur-3xl object-cover rounded-b-none` }
+                    fill
+                ></Image>
+            </div> }
+
+            <div
+                className={ post.header_img ?
+                    'mx-8 -mt-16 backdrop-blur transition bg-zinc-300/80 dark:bg-gray-600/25 rounded-2xl z-30'
+                    : 'mx-6 mt-6'
+                }>
+                <div className={ post.header_img ? `p-4` : 'p-4 pt-2' }>
+                    <Chip className={ `mb-2` } radius={ `sm` } color={ `secondary` }
+                          variant={ `solid` }>{ post.category }</Chip>
+                    <p className={ `text-4xl font-bold` }> { post.title }</p>
+                    <p className={ `text-xl` }> { post.subtitle }</p>
+                </div>
+
+                <div className={ `mx-2 -mt-2 mb-2 flex flex-row flex-wrap justify-between w-full` }>
+                    <div>
+                        <ul className={ `flex flex-row flex-wrap` }>
+                            {
+                                post.tags.map((tag: string, key: any) => (
+                                    <li key={ key } className={ `mx-1 mb-1` }>
+                                        <Chip>{ tag }</Chip>
+                                    </li>
+                                ))
+                            }
+                        </ul>
+                    </div>
+                    <div className={ `flex flex-row place-content-end mb-1 mr-6 items-center mx-1` }>
+                        <MdCalendarMonth />
+                        <p className={ `text-zinc-500 dark:text-zinc-400 ml-1` }>
+                            { (new Date(post.first_update)).toLocaleString('default', {
+                                month: `long`,
+                                day: `numeric`,
+                                year: `numeric`
+                            }) }
+                        </p>
+                    </div>
+                </div>
+            </div>
+
+        </>
+    );
+};
+export default Headers;

frontend/app/(pages)/blog/post/[id]/MinifyPostCard.tsx

@@ -0,0 +1,58 @@
+import React from 'react';
+import { Card, CardFooter, CardHeader } from '@nextui-org/card';
+import Image from 'next/image';
+import Link from 'next/link';
+
+type Props = {
+    post: any
+    desc: string
+}
+
+const MinifyPostCard = (props: Props) => {
+    const { post, desc } = props;
+    const img_url = post['header_img'] as string;
+    return (
+        <div className={ 'w-full transition hover:brightness-75' }>
+            <Card isFooterBlurred
+                  className="w-full h-[300px] shadow-none border-0 rounded-none overflow-hidden"
+                  as={ Link }
+                  isPressable
+                  href={ `/blog/post/${ post['id'] }` }
+            >
+                <CardHeader className="absolute z-10 top-1 flex-col items-start">
+                    <p className={ `text-tiny uppercase font-bold ${ img_url ? 'text-white/60' : 'text-black/60 dark:text-white/60' }` }>{ desc }</p>
+                </CardHeader>
+                { img_url &&
+                    <div className={ 'h-full' }>
+                        <div className={ 'relative h-[300px] overflow-hidden' }>
+                            <Image
+                                className={ 'object-cover object-center ' }
+                                src={ img_url }
+                                alt={ post.title }
+                                fill
+                            />
+                        </div>
+                        <CardFooter
+                            className="absolute transition-colors bg-zinc-300/80 dark:bg-gray-600/25 dark:backdrop-brightness-75 bottom-0  justify-between rounded-none">
+                            <div>
+                                <p className="text-2xl font-bold">{ post['title'] }</p>
+                                <p className="">{ post['sub_title'] }</p>
+                            </div>
+                        </CardFooter>
+                    </div>
+                }
+                { !img_url &&
+                    <div className={ 'h-full grid p-6 place-content-center' }>
+                        <div className={ 'flex flex-col max-h-fit text-left' }>
+                            <p className={ 'text-3xl font-bold text-balance' }>{ post['title'] }</p>
+                            <div className={ 'w-1/4 h-[2px] my-2 bg-zinc-500 dark:bg-zinc-400' }></div>
+                            <p className={ 'text-xl text-pretty break-words' }>{ post['sub_title'] }</p>
+                        </div>
+                    </div>
+                }
+            </Card>
+
+        </div>
+    );
+};
+export default MinifyPostCard;

frontend/app/(pages)/blog/post/[id]/PostCard.tsx

@@ -0,0 +1,55 @@
+import React from 'react';
+import { Card, CardBody } from '@nextui-org/card';
+import Headers from '@/app/(pages)/blog/post/[id]/Headers';
+import Footer from '@/app/(pages)/blog/post/[id]/Footer';
+import MarkdownRenderer from '@/app/(pages)/public/MarkdownRenderer';
+
+type Props = {
+    post: any
+}
+
+async function PostCard(props: Props) {
+    let post = props.post;
+    return (
+        <div>
+            <Card className={ `max-w-full relative` }>
+
+                {/* card headers */ }
+                <Headers title={ post.title }
+                         subtitle={ post.sub_title }
+                         summary={ post.summary }
+                         category={ post.category }
+                         tags={ post.tags }
+                         first_update={ post.first_update }
+                         header_img={ post.meta.header_img }
+                />
+
+                {/* card body */ }
+                <CardBody>
+                    <div className={ 'p-5' }>
+                        <MarkdownRenderer>
+                            { post.content }
+                        </MarkdownRenderer>
+                    </div>
+                </CardBody>
+
+
+                {/* card footer */ }
+                <Footer
+                    adjacent_posts={ post.adj }
+                    perm_link={ post.meta.link }
+                    author={ post.meta.author }
+                    author_link={ post.meta.author_link }
+                    first_update={ post.first_update }
+                    last_update={ post.last_update }
+                    cc={ post.meta.cc }
+                    post_id={ post.meta.id }
+                    title={ post.title }
+                />
+
+            </Card>
+        </div>
+    );
+}
+
+export default PostCard;

frontend/app/(pages)/blog/post/[id]/page.tsx

@@ -0,0 +1,70 @@
+import React, { cache } from 'react';
+import PostCard from '@/app/(pages)/blog/post/[id]/PostCard';
+import ButtonGoBack from '@/app/(pages)/blog/post/[id]/ButtonGoBack';
+import * as motion from 'motion/react-client';
+import { fetchNocturneApi } from '@/app/(pages)/blog/api';
+import { Metadata } from 'next';
+import { SITE_CONFIG } from '@/src/constants';
+
+const fetchPost = cache(async (id: string) => {
+    const res = await fetchNocturneApi(`/blog/get_post/${ id }`);
+    // throw Error('Not Found');
+    return await res.json();
+});
+
+export async function generateMetadata(
+    { params }: { params: Promise<{ id: string }> })
+    : Promise<Metadata> {
+    try {
+        const title = (await fetchPost((await params).id)).title as string;
+        return {
+            title: `${ title } - ${ SITE_CONFIG.name }`
+        };
+    } catch (e) {
+        return {
+            title: 'Unexpected Error'
+        };
+    }
+}
+
+async function BlogReader({
+    params
+}: {
+    params: Promise<{ id: string }>
+}) {
+    try {
+        let post = await fetchPost((await params).id);
+
+        return (
+            <motion.div
+                className={ `max-w-full` }
+                initial={ { y: 20, opacity: 0 } }
+                animate={ { y: 0, opacity: 1 } }
+                transition={ { ease: 'easeInOut', duration: 0.5 } }
+            >
+                <div className={ `max-w-full` }>
+                    <PostCard post={ post } />
+                </div>
+                <div className={ 'mt-3' }>
+                    <ButtonGoBack />
+                </div>
+            </motion.div>
+        );
+    } catch (e: any) {
+        return (
+            <div className={ `flex h-full w-full justify-center items-center` }>
+                <div className={ `flex-row` }>
+                    <p className={ `text-xl font-bold` }>
+                        { 'Unexpected Error:' }
+                    </p>
+                    <p className={ `font-bold` }>
+                        { e.message }
+                    </p>
+                </div>
+            </div>
+        );
+    }
+
+}
+
+export default BlogReader;

frontend/app/(pages)/friends/layout.tsx

@@ -0,0 +1,21 @@
+import React from 'react';
+import { Metadata } from 'next';
+import { SITE_CONFIG } from '@/src/constants';
+
+export const metadata: Metadata = {
+    title: `Friends - ${ SITE_CONFIG.name }`
+};
+
+function Layout({
+    children
+}: {
+    children: React.ReactNode;
+}) {
+    return (
+        <div className={ 'p-7' }>
+            { children }
+        </div>
+    );
+}
+
+export default Layout;

frontend/app/(pages)/friends/page.tsx

@@ -0,0 +1,93 @@
+import React from 'react';
+import { fetchJson } from '@/app/fetch';
+import { Card, CardBody } from '@nextui-org/react';
+import Image from 'next/image';
+import Link from 'next/link';
+
+export default async function Friends() {
+
+    const list = await fetchJson('https://raw.githubusercontent.com/Lumither/friends/master/friends.json');
+    const listLength = list.length;
+    const listMaxIdx = listLength - 1;
+    const listIsOdd = listLength % 2 !== 0;
+
+    return (
+        <div>
+            <div className={ `min-h-dvh pb-10` }>
+                <div className={ 'p-7 pt-[10%] md:pt-[20%]' }>
+                    <div className={ 'flex flex-col md:flex-row gap-x-3 justify-center' }>
+                        <p className={ 'text-3xl text-center text-balance' }>海内存知己</p>
+                        <p className={ 'text-3xl text-center text-balance' }>天涯若比邻</p>
+                    </div>
+                    <p className={ 'text-center text-balance text-zinc-500 dark:text-zinc-400' }>{ 'Though far apart, kin at heart' }</p>
+                </div>
+                <div className={ 'flex w-full h-full justify-center pt-3' }>
+                    <ul className={ 'grid grid-cols-2 gap-x-6 gap-y-3 md:max-w-[90%] xl:max-w-[85%] w-full' }>
+                        {
+                            list.map((friend: any, key: number) => (
+                                <li
+                                    key={ key }
+                                    className={ (key === listMaxIdx && listIsOdd) ? 'col-span-2 flex justify-center' : 'col-span-2 md:col-span-1' }
+                                >
+                                    <Card
+                                        isHoverable
+                                        isPressable
+                                        shadow={ 'none' }
+                                        as={ Link }
+                                        href={ friend['url'] }
+                                        className={ 'dark:bg-[#282830] w-full md:w-fit max-w-full shadow' }
+                                    >
+                                        <CardBody className={ 'overflow-visible pb-0.5' }>
+                                            <div className={ 'flex flex-row' }>
+                                                <div className={ 'flex p-2' }>
+                                                    <div
+                                                        className={ 'h-[80px] w-[80px] relative rounded-2xl' }>
+                                                        <Image
+                                                            alt="avatar"
+                                                            className="object-cover rounded-2xl z-10"
+                                                            fill
+                                                            unoptimized
+                                                            src={ friend['avatar'] }
+                                                        />
+                                                        <Image
+                                                            alt="avatar"
+                                                            className="relative object-cover rounded-2xl scale-110 blur-3xl"
+                                                            fill
+                                                            unoptimized
+                                                            src={ friend['avatar'] }
+                                                        />
+                                                    </div>
+                                                </div>
+                                                <div className={ 'p-2 flex-col max-w-full' }>
+                                                    <p className={ 'text-xl' }>{ friend['title'] }</p>
+                                                    { (friend['name'] === undefined || friend['name'].isNull) ??
+                                                        <p className={ 'text-zinc-600 dark:text-zinc-400' }>{ `@ ${ friend['name'] }` }</p> }
+                                                    { (friend['desc'] === undefined || friend['desc'].isNull) ??
+                                                        <p className={ 'text-sm text-pretty text-zinc-600 dark:text-zinc-300 mt-1' }>{ friend['desc'] }</p> }
+                                                </div>
+                                            </div>
+                                        </CardBody>
+                                        <div className={ 'h-2 relative w-full' }>
+                                            <Image
+                                                alt="theme bar"
+                                                draggable={ false }
+                                                className="object-cover object-center scale-110 blur-lg"
+                                                fill
+                                                unoptimized
+                                                src={ friend['avatar'] }
+                                            />
+                                        </div>
+                                    </Card>
+                                </li>
+                            ))
+                        }
+                    </ul>
+                </div>
+            </div>
+            <p className={ 'text-center' }>想要成为好伙伴嘛，向<span
+                className={ 'text-blue-800 dark:text-blue-500' }><Link
+                href={ 'https://github.com/Lumither/friends/' }>这里</Link></span>发起PR吧
+            </p>
+        </div>
+    );
+}

frontend/app/(pages)/layout.tsx

@@ -0,0 +1,30 @@
+import React from 'react';
+import Navbar from '@/components/Navbar';
+import Footer from '@/components/Footer';
+
+import * as motion from 'motion/react-client';
+
+function Layout({
+    children
+}: {
+    children: React.ReactNode;
+}) {
+    return (
+        <div>
+            <motion.div
+                initial={ { opacity: 0 } }
+                animate={ { opacity: 1 } }
+                transition={ { ease: 'easeInOut', duration: 0.3, delay: 0.5 } }
+                className={ `justify-center flex flex-row w-full max-w-full` }>
+                <Navbar />
+                <div className={ `flex flex-col flex-1 max-w-[1024px] min-w-0` }>
+                    { children }
+                    <Footer />
+                </div>
+            </motion.div>
+        </div>
+    )
+        ;
+}
+
+export default Layout;

frontend/app/(pages)/public/MarkdownRenderer.tsx

@@ -0,0 +1,64 @@
+import React from 'react';
+import Markdown from 'react-markdown';
+import remarkGfm from 'remark-gfm';
+import remarkToc from 'remark-toc';
+import remarkFrontmatter from 'remark-frontmatter';
+import rehypeRaw from 'rehype-raw';
+import rehypeSanitize from 'rehype-sanitize';
+import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
+import { oneDark } from 'react-syntax-highlighter/dist/esm/styles/prism';
+
+const MarkdownRenderer = ({ children }: { children: React.ReactNode }) => {
+    return (
+        <div className={ 'w-full' }>
+            <Markdown
+                className={ `max-w-full text-justify text-pretty prose prose-sm prose-neutral dark:prose-invert
+                 md:prose-md lg:prose-lg prose-code:overflow-x-scroll`
+                }
+                remarkPlugins={ [ remarkGfm, remarkToc, remarkFrontmatter ] }
+                rehypePlugins={ [ rehypeRaw, rehypeSanitize ] }
+                components={ {
+                    pre(props) {
+                        const { node, className, children, ...rest } = props;
+                        if ((children as any)['type'] === 'code') {
+                            const match = /language-(\w+)/.exec((children as any)['props']['className'] || '');
+                            let lang = match ? match[1] : 'text';
+                            return (
+                                <pre className={ `not-prose` }>
+                                    <SyntaxHighlighter
+                                        // @ts-ignore
+                                        style={ oneDark }
+                                        language={ lang }
+                                        showLineNumbers
+                                        // wrapLongLines
+                                        // wrapLines
+                                        classNames={ className }
+                                        PreTag="div"
+                                        { ...rest }
+                                    >
+                                        {
+                                            String((children as any)['props']['children']).replace(/\n$/, '')
+                                        }
+                                    </SyntaxHighlighter>
+                                </pre>
+                            );
+                        } else {
+                            return (
+                                <pre className={ `not-prose` }>
+                                    <code className={ className } { ...props }>
+                                        { children }
+                                    </code>
+                               </pre>
+                            );
+                        }
+                    }
+                } }
+            >
+                {
+                    children as any
+                }
+            </Markdown>
+        </div>
+    );
+};
+export default MarkdownRenderer;

frontend/app/(pages)/public/screenSizeTrigger.ts

@@ -0,0 +1,35 @@
+import { useEffect, useState } from 'react';
+
+const screenSize = new Map<string, number>(
+    [
+        [ 'sm', 640 ],
+        [ 'md', 768 ],
+        [ 'lg', 1024 ],
+        [ 'xl', 1280 ],
+        [ '2xl', 2536 ]
+    ]
+);
+
+export const useScreenSizeTrigger = (size: number | string) => {
+    const criticalSize = (typeof size === 'string') ? (screenSize.get(size) ?? 768) : size;
+
+    const [ isCritical, setIsCritical ] = useState(false);
+    useEffect(() => {
+        const updateMobileWidth = () => {
+            if (window.innerWidth < criticalSize) {
+                setIsCritical(true);
+            } else {
+                setIsCritical(false);
+            }
+        };
+        updateMobileWidth();
+        window.addEventListener('resize', updateMobileWidth);
+        return () => {
+            window.removeEventListener('resize', updateMobileWidth);
+        };
+
+    });
+
+    return isCritical;
+
+};

frontend/app/(pages)/search/page.tsx

@@ -0,0 +1,13 @@
+import React from 'react';
+import ConstructionPlaceHolder from '@/components/ConstructionPlaceHolder';
+
+const Search = () => {
+    return (
+        <div className={ `h-dvh` }>
+            <ConstructionPlaceHolder />
+        </div>
+
+    );
+};
+
+export default Search;

frontend/app/Activities.tsx

@@ -0,0 +1,43 @@
+import React, { useEffect, useState } from 'react';
+import { Activity } from '@/src/HomePageActivities/activity';
+import { getGhActivities } from '@/src/HomePageActivities/ghActivity';
+import * as motion from 'motion/react-client';
+
+const Activities = () => {
+
+    const [ activities, setActivities ] = useState<Activity[] | null>(null);
+
+    useEffect(() => {
+        getGhActivities().then(data => setActivities(data));
+    }, []);
+
+    if (!activities) {
+        return (
+            <div>
+                <p>loading</p>
+            </div>
+        );
+    } else {
+        return (
+            <div>
+                <ul className={ 'flex flex-col gap-y-3 items-end' }>
+                    { activities.map((activity, key) => (
+                        <motion.div
+                            key={ key }
+                            initial={ { opacity: 0, y: 20 } }
+                            animate={ { opacity: 1, y: 0 } }
+                            transition={ { ease: 'easeInOut', duration: 0.2 } }
+                        >
+                            <li className={ 'backdrop-blur bg-white/75 dark:bg-black/45 rounded-xl w-fit' }>
+                                { activity.toElement() }
+                            </li>
+                        </motion.div>
+                    )) }
+                </ul>
+            </div>
+        );
+    }
+
+};
+
+export default Activities;

frontend/app/entries.tsx

@@ -0,0 +1,56 @@
+import React from 'react';
+import {
+    IoFlask,
+    IoHome,
+    IoInformationCircle,
+    IoLink,
+    IoLogoGithub,
+    IoMail,
+    IoPencil,
+    IoSearch
+} from 'react-icons/io5';
+
+export const entries: { display_name: string; href: string; icon: React.ReactNode }[] = [
+    {
+        icon: <IoHome size={ `20px` }></IoHome>,
+        display_name: 'Home',
+        href: '/'
+    },
+    {
+        icon: <IoInformationCircle size={ `20px` }></IoInformationCircle>,
+        display_name: 'About',
+        href: '/about'
+    },
+    {
+        icon: <IoPencil size={ `20px` }></IoPencil>,
+        display_name: 'Blog',
+        href: '/blog'
+    },
+    {
+        icon: <IoLink size={ `20px` }></IoLink>,
+        display_name: 'Friends',
+        href: '/friends'
+    },
+    {
+        icon: <IoSearch size={ `20px` }></IoSearch>,
+        display_name: 'Search',
+        href: '/search'
+    }, {
+        icon: <IoFlask size={ '20px' } />,
+        display_name: 'Lab',
+        href: 'https://lab.lmt.moe'
+    }
+];
+
+export const connections: { label: string, href: string, icon: React.ReactNode }[] = [
+    {
+        label: 'Github',
+        href: 'https://github.com/Lumither',
+        icon: <IoLogoGithub size={ `30px` } />
+    },
+    {
+        label: 'email',
+        href: 'mailto:lumither@outlook.com',
+        icon: <IoMail size={ `30px` } />
+    }
+];

frontend/app/fetch.ts

@@ -0,0 +1,17 @@
+export async function fetchText(url: string, ttl: number = 600) {
+    const res = await fetch(url, {
+        next: {
+            revalidate: ttl
+        }
+    });
+    return await res.text();
+}
+
+export async function fetchJson(url: string, ttl: number = 600) {
+    const res = await fetch(url, {
+        next: {
+            revalidate: ttl
+        }
+    });
+    return await res.json();
+}