git(global) create release branch

Backend refactor

.env

@@ -1,18 +1,19 @@
 # postgres settings
 DB_HOST=localhost
 DB_PORT=5432
-POSTGRES_PASSWORD=
-POSTGRES_USER=
+#POSTGRES_PASSWORD=
+POSTGRES_USER=nocturne
 POSTGRES_DB=nocturne
+POSTGRES_HOST=postgres
 
 # backend settings
-GIT_WORK_DIR=../blog_posts_git
-BLOG_ENDPOINT=https://github.com/Lumither/blog-posts.git
-LOG_ROOT_DIR=/var/log/nocturne
-BACKEND_PORT=3001
+#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://localhost:3001
+API_LOCAL_URL=http://backend:3001
 API_REMOTE_URL=https://lumither.com/api
-
-

.gitignore

@@ -2,8 +2,9 @@
 .env.*
 /container/*/.env
 
-# idea related
+# IDE related
 .idea
+.vscode
 
 # exclude post repo
 /blog_posts_git

Makefile

@@ -1,6 +1,16 @@
-ddev:
+ARCH := $(shell uname -m)
+ifeq ($(ARCH), arm64)
+    ARCH := aarch64
+endif
+
+all: release
+
+release:
+	docker compose -f prod.compose.yaml build --build-arg ARCH=$(ARCH)
+
+dev:
 	docker-compose -f dev.compose.yaml up --build
 
-dclean:
-	docker-compose -f dev.compose.yaml rm -fsv
+clean:
+	docker-compose -f prod.compose.yaml -f dev.compose.yaml rm -fsv
 

README.md

@@ -1,14 +1,12 @@
 # `Nocturne: personal website & CMS`
 
+> This is the last working version
+
 This is the code repo of my personal website, and [here](https://github.com/Lumither/blog-posts/) is the link of the
 content repo.
 
 Powered by Next.js and Rust, built with passion and love
 
-<p align="center">
-  <img src="https://avatars.githubusercontent.com/u/46409277?v=4" alt="GitHub Avatar"/>
-</p>
-
 *will add more here in the future
 
 ## Nav:

backend/.dockerignore

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

backend/Cargo.toml

@@ -1,25 +1,8 @@
-[package]
-name = "backend"
-version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-axum = "0.7.5"
-dotenv = "0.15.0"
-serde = { version = "1.0.199", features = ["derive"] }
-serde_json = "1.0.116"
-tokio = { version = "1.37.0", features = ["full"] }
-uuid = { version = "1.8.0", features = ["v4", "fast-rng", "serde"] }
-sqlx = { version = "0.7.4", features = ["runtime-tokio", "tls-native-tls", "postgres", "chrono", "uuid"] }
-chrono = { version = "0.4.38", features = ["serde", "alloc"] }
-regex = "1.10.4"
-futures = { version = "0.3.30", features = ["executor"] }
-tracing = "0.1.40"
-tracing-subscriber = "0.3.18"
-tracing-appender = "0.2.3"
-log = "0.4.21"
-sha2 = "0.10.8"
-thiserror = "1.0.63"
-base64 = "0.22.1"
+[workspace]
+resolver = "2"
+members = [
+    "api_server",
+    "constants",
+    "macros",
+    "markdown",
+]

backend/api_server/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "api_server"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+macros = { path = "../macros" }
+constants = { path = "../constants" }
+markdown = { path = "../markdown" }
+chrono = { version = "0.4.38", features = ["serde", "alloc"] }
+tracing = "0.1.40"
+tracing-subscriber = { version = "0.3.18", features = ["env-filter", "fmt"] }
+tracing-appender = "0.2.3"
+dotenv = "0.15.0"
+dirs = "5.0.1"
+tokio = { version = "1.40.0", features = ["full"] }
+sqlx = { version = "0.8.2", features = ["runtime-tokio", "tls-native-tls", "postgres", "chrono", "uuid"] }
+axum = { version = "0.7.5", features = ["macros"] }
+serde = { version = "1.0.199", features = ["derive"] }
+serde_json = "1.0.128"
+uuid = { version = "1.10.0", features = ["v4", "fast-rng", "serde"] }
+futures = { version = "0.3.30", features = ["executor"] }
+cron = "0.13.0"
+git2 = "0.19.0"
+thiserror = "2.0.3"

backend/api_server/src/blog/api/get_page_count.rs

@@ -1,4 +1,5 @@
-use crate::constants::PAGE_SIZE;
+use constants::blog::PAGE_SIZE;
+
 use axum::extract::State;
 use axum::Json;
 use serde_json::{json, Value};

backend/api_server/src/blog/api/get_post.rs

@@ -1,12 +1,11 @@
-use std::str::FromStr;
-
 use axum::{
     extract::{Path, State},
     http::StatusCode,
     Json,
 };
 use serde_json::{json, Value};
-use sqlx::{Error, PgPool, query, Row};
+use sqlx::{query, Error, PgPool, Row};
+use std::str::FromStr;
 use tracing::error;
 use uuid::Uuid;
 

backend/api_server/src/blog/api/get_post_list.rs

@@ -1,4 +1,7 @@
-use crate::constants::PAGE_SIZE;
+use std::error::Error;
+
+use constants::blog::PAGE_SIZE;
+
 use axum::{extract::Query, extract::State, http::StatusCode, Json};
 use chrono::{DateTime, Utc};
 use futures::future::join_all;
@@ -13,6 +16,7 @@ pub struct Params {
     page: Option<u32>,
 }
 
+#[axum::debug_handler]
 pub async fn get_post_list(
     State(db_connection): State<PgPool>,
     Query(params): Query<Params>,
@@ -46,33 +50,72 @@ pub async fn get_post_list(
         }
     };
 
-    let mut res = Map::new();
+    let mut res = Vec::new();
     let posts: Vec<_> = post_list
         .into_iter()
-        .map(|post| analyze_post(&db_connection, post))
+        .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));
+    // res.insert("posts".to_string(), Value::from(posts));
     Ok(Json::from(Value::from(res)))
 }
 
-async fn analyze_post(db_connection: &PgPool, post: PgRow) -> Value {
+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");
 
-    json!({
+    Ok(json!({
         "post_id": post_id.to_string(),
         "title": post.get::<String, _>("title"),
         "category": post.get::<String, _>("category"),
-        "header_img": post.get::<String, _>("header_img"),
+        "header_img": header_img,
         "sub_title": post.get::<String, _>("sub_title"),
         "summary": post.get::<String, _>("summary"),
-        "last_update": post.get::<DateTime<Utc>, _>("last_update"),
+        "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> {

backend/api_server/src/blog/cron/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/api_server/src/blog/cron/check_update/index.rs

@@ -0,0 +1,351 @@
+use std::error::Error;
+use std::path::Path;
+
+use crate::blog::cron::check_update::utils::get_md_file_basename;
+use crate::blog::cron::check_update::{error::PostIdxError, utils::parse_date};
+use markdown::MdFile;
+
+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/api_server/src/blog/cron/check_update/mod.rs

@@ -0,0 +1,146 @@
+use std::env;
+use std::fs::remove_dir_all;
+use std::path::{Path, PathBuf};
+
+use crate::{
+    blog::cron::check_update::{
+        index::drop_index,
+        utils::{expand_path, get_md_file_basename, index_files, search_md},
+    },
+    utils::git,
+};
+use constants::config::general::{default_value, var_name};
+use macros::panic_with_log;
+
+use git2::{Delta, Repository};
+use sqlx::{Pool, Postgres};
+use tracing::{error, info, warn, Level};
+
+mod error;
+mod index;
+mod utils;
+
+pub fn task(db_connection: &Pool<Postgres>) {
+    // 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());
+
+    match Repository::open(&git_work_dir) {
+        Ok(repo) => {
+            // prevent git remote url mismatch (clean cache)
+            match repo.find_remote(&git_remote_name) {
+                Ok(remote) => {
+                    if remote.url().is_some_and(|url| url != git_url) {
+                        remove_dir_all(&git_work_dir).unwrap();
+                        warn!("blog content git({}) url mismatch, reinitialized", &git_url);
+                        return;
+                    }
+                }
+                Err(e) => {
+                    remove_dir_all(&git_work_dir).unwrap();
+                    error!(
+                        "unexpected error on indexing blog content git({}), reinitialized: {}",
+                        &git_url, e
+                    );
+                }
+            }
+
+            match git::sync(&git_remote_name, &git_remote_branch, &repo) {
+                Ok(updates) => {
+                    if !updates.is_empty() {
+                        // incremental update
+                        info!(
+                            "blog content git({}) update detected: {:?}",
+                            &git_url, updates
+                        );
+
+                        let mut update_md: Vec<PathBuf> = vec![];
+
+                        for update in updates {
+                            if [Delta::Deleted, Delta::Untracked].contains(&update.status) {
+                                if let Some(path) = &update.old_path {
+                                    if drop_index(
+                                        &get_md_file_basename(
+                                            path.file_name().unwrap().to_str().unwrap(),
+                                        ),
+                                        db_connection,
+                                    )
+                                    .is_ok()
+                                    {
+                                        info!(
+                                            "blog content git({}) file `{}` is detected as deleted/untracked, index dropped",
+                                            &git_url,
+                                            &path.display()
+                                        );
+                                    } else {
+                                        error!(
+                                            "blog content git({}) file `{}` is detected as deleted/untracked, failed to drop index",
+                                            &git_url,
+                                            &path.display()
+                                        )
+                                    }
+                                }
+                            } else if let Some(path) = &update.new_path {
+                                if path.components().any(|comp| comp.as_os_str() == "posts")
+                                    && path.extension().is_some_and(|ext| ext == "md")
+                                {
+                                    update_md.push(path.to_path_buf());
+                                }
+                            }
+                        }
+
+                        index_files(&update_md, db_connection);
+                    }
+                }
+                Err(e) => {
+                    error!(
+                        "failed to sync blog content git({}) updates: {}",
+                        &git_url, e
+                    );
+                }
+            }
+        }
+        Err(_) => {
+            match Repository::clone(&git_url, &git_work_dir) {
+                Ok(_repo) => {
+                    // full repo index
+                    let files = search_md(git_work_dir.join("posts"));
+                    index_files(&files, db_connection);
+                }
+                Err(e) => {
+                    error!("failed to clone blog content git({}): {}", &git_url, e);
+                }
+            }
+        }
+    };
+}

backend/api_server/src/blog/cron/check_update/utils.rs

@@ -0,0 +1,86 @@
+use dirs::home_dir;
+use std::path::PathBuf;
+
+use crate::blog::cron::check_update::index::index_file;
+use chrono::{DateTime, FixedOffset, ParseResult};
+use constants::config::general::{default_value, var_name};
+use constants::time::DEFAULT_DATE_FORMAT;
+
+use futures::executor::block_on;
+use futures::future::join_all;
+use sqlx::{Pool, Postgres};
+use tokio::runtime::Runtime;
+use tokio::spawn;
+use tracing::{error, 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/api_server/src/blog/cron/mod.rs

@@ -0,0 +1,14 @@
+use crate::scheduler::tasks::basic::BasicTask;
+use crate::scheduler::tasks::Task;
+use sqlx::{Pool, Postgres};
+
+pub mod check_update;
+
+pub fn get_tasks(db_connection: Pool<Postgres>) -> Vec<Box<dyn Task>> {
+    let db_conn_clone = db_connection.clone();
+    vec![
+        BasicTask::new(move || check_update::task(&db_conn_clone), "0/15 * * * * *")
+            .unwrap()
+            .to_task(),
+    ]
+}

backend/api_server/src/blog/mod.rs

@@ -0,0 +1,17 @@
+mod api;
+pub mod cron;
+
+use crate::blog::api::{
+    get_page_count::get_page_count, get_post::get_post, get_post_list::get_post_list,
+};
+
+use axum::routing::get;
+use axum::Router;
+use sqlx::{Pool, Postgres};
+
+pub fn get_router() -> Router<Pool<Postgres>> {
+    Router::new()
+        .route("/get_post_list", get(get_post_list))
+        .route("/get_page_count", get(get_page_count))
+        .route("/get_post/:post_id", get(get_post))
+}

backend/api_server/src/init/cron.rs

@@ -0,0 +1,12 @@
+use crate::blog;
+use crate::scheduler::Scheduler;
+use sqlx::{Pool, Postgres};
+
+pub fn start(db_pool: Pool<Postgres>) {
+    let scheduler = Scheduler::new();
+    let _ = vec![blog::cron::get_tasks(db_pool.clone())]
+        .into_iter()
+        .map(|list| scheduler.insert_list(list))
+        .collect::<Vec<_>>();
+    scheduler.start().unwrap()
+}

backend/api_server/src/init/database.rs

@@ -0,0 +1,41 @@
+use std::env;
+use std::error::Error;
+use std::str::FromStr;
+
+use 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: temporal 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/api_server/src/init/logger.rs

@@ -0,0 +1,106 @@
+use std::path::Path;
+use std::{env, io};
+
+use chrono::Local;
+use constants::config::general::{default_value, var_name};
+use dirs::home_dir;
+use tracing::info;
+use tracing_appender::{non_blocking, non_blocking::WorkerGuard, rolling};
+use tracing_subscriber::{
+    filter::LevelFilter, fmt, fmt::format::Writer, fmt::time::FormatTime, fmt::MakeWriter,
+    layer::SubscriberExt, Layer, Registry,
+};
+
+struct LocalTimer;
+
+impl FormatTime for LocalTimer {
+    fn format_time(&self, w: &mut Writer<'_>) -> std::fmt::Result {
+        write!(
+            w,
+            "{}",
+            Local::now().format(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/api_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/api_server/src/init/mod.rs

@@ -0,0 +1,58 @@
+mod cron;
+mod database;
+pub mod logger;
+mod misc;
+mod schema;
+pub mod server;
+
+use macros::panic_with_log;
+use std::{env, panic};
+use tracing::{info, Level};
+
+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) => {
+            panic_with_log!(
+                Level::ERROR,
+                "database connection pool failed to initialize: {}",
+                e
+            );
+        }
+    };
+
+    // schema init
+    schema::init(&db_pool).await;
+
+    // load cron task
+    cron::start(db_pool.clone());
+
+    // api serve
+    match server::start(db_pool).await {
+        Ok(_) => {}
+        Err(e) => {
+            panic_with_log!(Level::ERROR, "server panicked: {}", e)
+        }
+    }
+}

backend/api_server/src/init/schema.rs

@@ -0,0 +1,49 @@
+use sqlx::{query, Pool, Postgres};
+use tracing::info;
+
+const POST_BASE_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Post
+(
+    post_id      UUID PRIMARY KEY,
+    title        VARCHAR(255) NOT NULL,
+    category     VARCHAR(255) NOT NULL,
+    filename     TEXT UNIQUE  NOT NULL,
+    summary      TEXT,
+    sub_title    TEXT,
+    content      TEXT         NOT NULL,
+    last_update  TIMESTAMPTZ,
+    first_update TIMESTAMPTZ  NOT NULL
+);
+"##;
+
+// base model, will add more cols at runtime
+const POST_META_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Meta
+(
+    post_id      UUID PRIMARY KEY
+);
+"##;
+
+const POST_HASH_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Hash
+(
+    post_id      UUID PRIMARY KEY,
+    hash         VARCHAR(44)
+);
+"##;
+
+const TAG_MODEL: &str = r##"
+CREATE TABLE IF NOT EXISTS Tag
+(
+    post_id UUID         NOT NULL,
+    tag     VARCHAR(255) NOT NULL
+);
+"##;
+
+pub async fn init(db_connection: &Pool<Postgres>) {
+    query(POST_BASE_MODEL).execute(db_connection).await.unwrap();
+    query(POST_META_MODEL).execute(db_connection).await.unwrap();
+    query(TAG_MODEL).execute(db_connection).await.unwrap();
+    query(POST_HASH_MODEL).execute(db_connection).await.unwrap();
+    info!("database schema initialized");
+}

backend/api_server/src/init/server.rs

@@ -0,0 +1,52 @@
+use std::env;
+use std::error::Error;
+use std::num::ParseIntError;
+use std::process::exit;
+
+use crate::blog;
+use axum::Router;
+use constants::config::server::{default_value, var_name};
+use macros::panic_with_log;
+use sqlx::{Pool, Postgres};
+use tracing::{error, info, warn, Level};
+
+pub async fn start(db_pool: Pool<Postgres>) -> Result<(), Box<dyn Error>> {
+    let app = Router::new()
+        .nest("/blog", blog::get_router())
+        .with_state(db_pool);
+
+    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 tokio::net::TcpListener::bind(format!("{}:{}", default_value::HOST, port)).await {
+            Ok(listener) => {
+                info!("server started on {}:{}", default_value::HOST, port);
+                listener
+            }
+            Err(e) => {
+                panic_with_log!(
+                    Level::ERROR,
+                    "failed to start server on {}:{}: {}",
+                    default_value::HOST,
+                    port,
+                    e.to_string()
+                );
+            }
+        };
+
+    axum::serve(listener, app).await.unwrap_or_else(|e| {
+        error!("failed to start axum: {}", e.to_string());
+        exit(1);
+    });
+    Ok(())
+}

backend/api_server/src/main.rs

@@ -0,0 +1,13 @@
+mod blog;
+mod init;
+mod scheduler;
+mod utils;
+
+#[tokio::main]
+async fn main() {
+    init::load_env();
+
+    let _guards = init::logger::init();
+
+    init::start().await;
+}

backend/api_server/src/scheduler/mod.rs

@@ -0,0 +1,194 @@
+use crate::{
+    scheduler::scheduler_error::SchedulerError,
+    scheduler::scheduler_error::SchedulerError::IdAlreadyRunning,
+    scheduler::scheduler_error::SchedulerError::IdNotFound, scheduler::sleeper::SkippableSleeper,
+    scheduler::tasks::Task,
+};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::RwLock;
+use std::{collections::HashMap, sync::Arc, thread};
+use tracing::log::error;
+use uuid::Uuid;
+
+pub mod scheduler_error;
+mod sleeper;
+mod task_func;
+pub mod tasks;
+
+struct TaskStatus {
+    sleeper: Option<Arc<SkippableSleeper>>,
+    is_alive: AtomicBool,
+}
+
+#[derive(Default)]
+pub struct Scheduler {
+    tasks: Arc<RwLock<HashMap<Uuid, Arc<Box<dyn Task>>>>>,
+    running: Arc<RwLock<HashMap<Uuid, Arc<TaskStatus>>>>,
+}
+
+impl Scheduler {
+    /// Start all tasks in the scheduler
+    pub fn start(&self) -> Result<(), SchedulerError> {
+        for (k, _v) in self.tasks.read()?.iter() {
+            self.run_non_blocking(k)?
+        }
+        Ok(())
+    }
+
+    /// Terminate all tasks in the scheduler
+    pub fn halt() {}
+
+    fn run_task(
+        running: Arc<RwLock<HashMap<Uuid, Arc<TaskStatus>>>>,
+        id: Uuid,
+        task: Arc<Box<dyn Task>>,
+    ) -> Result<(), SchedulerError> {
+        if running.read()?.get(&id).is_some() {
+            return Err(IdAlreadyRunning);
+        } else {
+            running.write()?.insert(
+                id,
+                TaskStatus {
+                    sleeper: None,
+                    is_alive: AtomicBool::new(true),
+                }
+                .into(),
+            );
+        }
+        loop {
+            if let Some(next_execution) = task.get_next_execution() {
+                // guarantee is alive
+                let task_status = {
+                    let running_reading_guard = running.read()?;
+                    running_reading_guard.get(&id).cloned().clone()
+                };
+                if let Some(task_status) = task_status {
+                    if !&task_status.is_alive.load(Ordering::SeqCst) {
+                        {
+                            let mut running_lock_guard = running.write()?;
+                            running_lock_guard.remove(&id);
+                        }
+                        return Ok(());
+                    } else {
+                        let sleeper = Arc::from(SkippableSleeper::from(next_execution));
+                        {
+                            let mut running_lock_guard = running.write()?;
+                            running_lock_guard.insert(
+                                id,
+                                TaskStatus {
+                                    sleeper: Some(sleeper.clone()),
+                                    is_alive: AtomicBool::new(true),
+                                }
+                                .into(),
+                            );
+                        }
+                        sleeper.start();
+                        task.call();
+                    }
+                }
+            } else {
+                error!("unexpected error ");
+                break;
+            }
+        }
+        Ok(())
+    }
+
+    /// Run a task with `id`
+    pub fn run(&self, id: &Uuid) -> Result<(), SchedulerError> {
+        let id = id.to_owned();
+        if let Some(task) = self.tasks.read()?.get(&id) {
+            Self::run_task(self.running.clone(), id, task.clone())
+        } else {
+            Err(IdNotFound)
+        }
+    }
+
+    pub fn run_non_blocking(&self, id: &Uuid) -> Result<(), SchedulerError> {
+        let id = id.to_owned();
+        if let Some(task) = self.tasks.read()?.get(&id) {
+            let running_clone = self.running.clone();
+            let task_clone = task.clone();
+            thread::spawn(move || Self::run_task(running_clone, id, task_clone));
+            Ok(())
+        } else {
+            Err(IdNotFound)
+        }
+    }
+
+    fn get_running(&self, id: &Uuid) -> Option<Arc<TaskStatus>> {
+        let ret = self.running.read().unwrap().get(id).cloned();
+        ret
+    }
+
+    /// Stop a task with `id`
+    pub fn stop(&self, id: &Uuid) -> Result<(), SchedulerError> {
+        match self.get_running(id) {
+            None => Err(IdNotFound),
+            Some(status) => {
+                status.is_alive.store(false, Ordering::SeqCst);
+                if let Some(s) = &status.sleeper {
+                    s.skip();
+                } else {
+                    return Err(IdAlreadyRunning);
+                }
+                Ok(())
+            }
+        }
+    }
+
+    pub fn now(&self, id: &Uuid) -> Result<(), SchedulerError> {
+        match self.get_running(id) {
+            None => Err(IdNotFound),
+            Some(status) => {
+                if let Some(s) = &status.sleeper {
+                    s.skip()
+                } else {
+                    return Err(IdAlreadyRunning);
+                }
+                Ok(())
+            }
+        }
+    }
+
+    pub fn insert(&self, task: Box<dyn Task>) -> Result<Uuid, SchedulerError> {
+        let id = Uuid::new_v4();
+        self.tasks.write()?.insert(id, Arc::new(task));
+        Ok(id)
+    }
+
+    pub fn insert_list(&self, tasks: Vec<Box<dyn Task>>) -> Result<Vec<Uuid>, SchedulerError> {
+        tasks.into_iter().map(|t| self.insert(t)).collect()
+    }
+
+    pub fn new() -> Self {
+        Self::default()
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::scheduler::tasks::basic::BasicTask;
+    use crate::scheduler::Scheduler;
+    use std::error::Error;
+    use std::thread;
+    use std::time::Duration;
+
+    #[test]
+    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))?;
+        for i in 1..=2 {
+            println!("Loop {} start", i);
+            println!("Run {}", i);
+            scheduler.run_non_blocking(&id)?;
+            thread::sleep(Duration::from_secs(4));
+            scheduler.stop(&id)?;
+            println!("Stop {}", i);
+            thread::sleep(Duration::from_secs(2));
+            println!("Loop {} finished", i);
+        }
+        Ok(())
+    }
+}

backend/api_server/src/scheduler/scheduler_error.rs

@@ -0,0 +1,44 @@
+use crate::scheduler::scheduler_error::SchedulerError::MutexPoison;
+use std::error::Error;
+use std::fmt::{Debug, Display, Formatter};
+use std::sync::PoisonError;
+
+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/api_server/src/scheduler/sleeper.rs

@@ -0,0 +1,77 @@
+use chrono::{DateTime, Utc};
+use std::sync::{Arc, Condvar, Mutex};
+use std::thread;
+use std::time::Duration;
+
+#[derive(Clone, Debug, Default)]
+pub struct SkippableSleeper {
+    pub duration: Duration,
+    state: Arc<(Mutex<bool>, Condvar)>,
+}
+
+impl SkippableSleeper {
+    pub fn new(duration: Duration) -> Self {
+        SkippableSleeper {
+            duration,
+            state: Arc::new((Mutex::new(false), Condvar::new())),
+        }
+    }
+
+    // Blocks until the duration has passed or skip() is called
+    pub fn start(&self) {
+        let (lock, cvar) = &*self.state;
+        let mut received = lock.lock().unwrap();
+        let state_clone = Arc::clone(&self.state);
+        let duration_clone = self.duration;
+        thread::spawn(move || {
+            thread::sleep(duration_clone);
+            let (lock, cvar) = &*state_clone;
+            let mut received = lock.lock().unwrap();
+            *received = true;
+            cvar.notify_one();
+        });
+        while !*received {
+            received = cvar.wait(received).unwrap();
+        }
+    }
+
+    // Skip the blocking delay
+    pub fn skip(&self) {
+        let (lock, cvar) = &*self.state;
+        let mut received = lock.lock().unwrap();
+        *received = true;
+        cvar.notify_one();
+    }
+}
+
+impl From<DateTime<Utc>> for SkippableSleeper {
+    fn from(value: DateTime<Utc>) -> Self {
+        let from_utc_timestamp = value.timestamp() as u64;
+        let curr_utc_timestamp = Utc::now().timestamp() as u64;
+        SkippableSleeper::new(Duration::from_secs(from_utc_timestamp - curr_utc_timestamp))
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use crate::scheduler::sleeper::SkippableSleeper;
+    use std::thread;
+    use std::time::Duration;
+
+    #[test]
+    fn usage() {
+        let sleeper = SkippableSleeper::new(Duration::new(10, 0));
+        thread::spawn({
+            let sleeper = sleeper.clone();
+            move || {
+                println!("Sleeping...");
+                sleeper.start();
+                println!("Woke up!");
+            }
+        });
+        println!("Start Sleeping...");
+        thread::sleep(Duration::from_secs(4));
+        println!("Skipping sleep...");
+        sleeper.skip();
+    }
+}

backend/api_server/src/scheduler/task_func.rs

@@ -0,0 +1,3 @@
+pub trait TaskFunc: Fn() + Send + Sync + 'static {}
+
+impl<T> TaskFunc for T where T: Fn() + Send + Sync + Clone + 'static {}

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

@@ -0,0 +1,37 @@
+use crate::scheduler::task_func::TaskFunc;
+use crate::scheduler::tasks::Task;
+use chrono::{DateTime, Utc};
+use cron::Schedule;
+use std::error::Error;
+use std::str::FromStr;
+
+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 Task> {
+        Box::new(self)
+    }
+}
+
+impl Task for BasicTask {
+    fn get_next_execution(&self) -> Option<DateTime<Utc>> {
+        self.schedule.upcoming(Utc).next()
+    }
+
+    fn call(&self) {
+        (self.func)()
+    }
+}

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

@@ -0,0 +1,8 @@
+use chrono::{DateTime, Utc};
+
+pub mod basic;
+
+pub trait Task: Send + Sync {
+    fn get_next_execution(&self) -> Option<DateTime<Utc>>;
+    fn call(&self);
+}

backend/api_server/src/utils/git.rs

@@ -0,0 +1,195 @@
+/// 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();
+
+    // Always fetch all tags.
+    // Perform a download and also update tips
+    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()
+            // For some reason, the force is required to make the working directory actually get updated
+            // I suspect we should be adding some logic to handle dirty working directory states,
+            // but this is just an example so maybe not.
+            .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)?)?;
+    // now create the merge commit
+    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())?;
+
+    // Do our merge commit and set the current branch head to that commit.
+    let _merge_commit = repo.commit(
+        Some("HEAD"),
+        &sig,
+        &sig,
+        &msg,
+        &result_tree,
+        &[&local_commit, &remote_commit],
+    )?;
+    // Set working tree to match head.
+    repo.checkout_head(None)?;
+    Ok(())
+}
+
+fn do_merge<'a>(
+    repo: &'a Repository,
+    remote_branch: &str,
+    fetch_commit: AnnotatedCommit<'a>,
+) -> Result<Vec<FileDelta>, git2::Error> {
+    // 1. do a merge analysis
+    let analysis = repo.merge_analysis(&[&fetch_commit])?;
+
+    let head_commit = repo.reference_to_annotated_commit(&repo.head()?)?;
+
+    // 2. Do the appropriate merge
+    if analysis.0.is_fast_forward() {
+        // println!("Doing a fast-forward");
+        // do a 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(_) => {
+                // The branch doesn't exist, so set the reference to the
+                // commit directly. Usually this is because you are pulling
+                // into an empty repository.
+                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() {
+        // do a normal merge
+        normal_merge(repo, &head_commit, &fetch_commit)?;
+    }
+    // else {
+    //     // already up-to-date
+    //     println!("Nothing to do...");
+    // }
+
+    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, _| {
+            // let delta = d.status();
+            //
+            // let n_path = d.new_file().path();
+            // let o_path = d.old_file().path();
+            //
+            // if let Some(path) = n_path {
+            //     updated_files.insert(path.to_owned());
+            // }
+            // if let Some(path) = o_path {
+            //     updated_files.insert(path.to_owned());
+            // }
+            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 // Continue
+        },
+        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/api_server/src/utils/mod.rs

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

backend/constants/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "constants"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

backend/constants/src/blog.rs

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

backend/constants/src/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/constants/src/lib.rs

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

backend/constants/src/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/macros/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "macros"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+tracing = "0.1.40"
+tracing-subscriber = "0.3.18"

backend/macros/src/lib.rs

@@ -0,0 +1 @@
+mod log;

backend/macros/src/log.rs

@@ -0,0 +1,45 @@
+/// 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);
+    }};
+}
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_panic_with_log() {
+        use std::io;
+        use tracing::Level;
+        use tracing_subscriber::prelude::*;
+        use tracing_subscriber::{fmt, Registry};
+
+        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 = "2021"
+
+[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 = "0.9.0"
+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::general_purpose, Engine};
+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/src/api/mod.rs

@@ -1,2 +0,0 @@
-pub mod get;
-pub mod post;

backend/src/api/post/errors/mod.rs

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

backend/src/api/post/errors/refresh.rs

@@ -1,61 +0,0 @@
-use thiserror::Error;
-
-#[derive(Error, Debug)]
-pub enum PostIdxError {
-    #[error("Failed to parse UUID <{}>: {}", id, err_msg)]
-    InvalidUUID { id: String, err_msg: String },
-
-    #[error(
-        "Failed to parse `last update time` for <{}> when creating post index: {}",
-        id,
-        err_msg
-    )]
-    InvalidLastUpdate { id: String, err_msg: String },
-
-    #[error(
-        "Failed to parse `first update time` for <{}> when creating post index: {}",
-        id,
-        err_msg
-    )]
-    InvalidFirstUpdate { id: String, err_msg: String },
-
-    #[error(
-        "Failed to parse `tag` for <{}> when creating post index: <{}>: {}",
-        id,
-        invalid_string,
-        err_msg
-    )]
-    InvalidTagString {
-        id: String,
-        invalid_string: String,
-        err_msg: String,
-    },
-
-    #[error(
-        "Database error on writing `{}` to table `{}`: <{}>: {}",
-        data_desc,
-        db_table,
-        id,
-        err_msg
-    )]
-    DBWriteFailure {
-        data_desc: String,
-        db_table: String,
-        id: String,
-        err_msg: String,
-    },
-
-    #[error(
-        "Database error on Reading `{}` from table `{}`: <{}>: {}",
-        data_desc,
-        db_table,
-        id,
-        err_msg
-    )]
-    DBReadFailure {
-        data_desc: String,
-        db_table: String,
-        id: String,
-        err_msg: String,
-    },
-}

backend/src/api/post/mod.rs

@@ -1,3 +0,0 @@
-mod errors;
-pub mod refresh;
-mod utils;

backend/src/api/post/refresh.rs

@@ -1,192 +0,0 @@
-use std::path::Path;
-use std::str::FromStr;
-use std::{env, fs};
-
-use axum::extract::{Query, State};
-use axum::http::StatusCode;
-use axum::Json;
-use futures::{stream, StreamExt};
-use serde::Deserialize;
-use serde_json::{json, Map, Value};
-use sha2::{Digest, Sha256};
-use sqlx::{query, PgPool};
-use tracing::error;
-use uuid::Uuid;
-
-use crate::api::post::errors::refresh::PostIdxError;
-use crate::api::post::utils::{build_post_idx, post};
-use crate::model::blog::{POST_BASE_MODEL, POST_HASH_MODEL, POST_META_MODEL, TAG_MODEL};
-
-#[derive(Deserialize)]
-pub struct Params {
-    /// refresh level
-    level: Option<String>,
-}
-
-pub async fn refresh(
-    State(db_connection): State<PgPool>,
-    Query(params): Query<Params>,
-) -> Result<StatusCode, (StatusCode, Json<Value>)> {
-    let is_force_refresh = params.level.unwrap_or("".to_string()) == "force";
-
-    // search post
-    let data_repo_dir = match env::var("GIT_WORK_DIR") {
-        Ok(value) => value,
-        Err(_) => {
-            return Err((
-                StatusCode::INTERNAL_SERVER_ERROR,
-                Json::from(json!((
-                    "error",
-                    "error at parsing environment variable: GIT_WORK_DIR"
-                ))),
-            ));
-        }
-    };
-    let post_dir = Path::new(&data_repo_dir).join("posts");
-
-    if is_force_refresh {
-        if let Err(e) = query("DROP TABLE IF EXISTS hash, meta, post, tag;")
-            .execute(&db_connection)
-            .await
-        {
-            error!(
-                "DB query error when deleting table: `hash`, `meta`, `post`, `tag`: {}",
-                e.to_string()
-            );
-            return Err((
-                StatusCode::INTERNAL_SERVER_ERROR,
-                Json::from(json!(("error", e.to_string()))),
-            ));
-        }
-    }
-
-    // generate post idx
-    let post_path = search_md(&post_dir);
-
-    let post_list_with_hash: Vec<(Map<_, _>, Vec<_>)> = post_path
-        .into_iter()
-        .filter_map(|post_path| match post::from_path(&post_path) {
-            Ok(post) => match fs::read(&post_path) {
-                Ok(bytes) => {
-                    let mut hasher = Sha256::new();
-                    hasher.update(bytes);
-                    let hash = hasher.finalize().to_vec();
-                    Some((post, hash))
-                }
-                Err(e) => {
-                    error!(
-                        "Failed to read file while hashing the post <{}>, skipping: {}",
-                        post_path,
-                        e.to_string()
-                    );
-                    None
-                }
-            },
-            Err(e) => {
-                error!(
-                    "Failed to parse post <{}>, skipping: {}",
-                    post_path,
-                    e.to_string()
-                );
-                None
-            }
-        })
-        .collect();
-
-    // db create
-    query(POST_BASE_MODEL)
-        .execute(&db_connection)
-        .await
-        .unwrap();
-    query(POST_META_MODEL)
-        .execute(&db_connection)
-        .await
-        .unwrap();
-    query(TAG_MODEL).execute(&db_connection).await.unwrap();
-    query(POST_HASH_MODEL)
-        .execute(&db_connection)
-        .await
-        .unwrap();
-
-    let res: Vec<_> = stream::iter(post_list_with_hash)
-        .map(|(post, hash)| {
-            let db_clone = db_connection.clone();
-            async move { build_post_idx(&db_clone, post, hash).await }
-        })
-        .buffer_unordered(usize::MAX)
-        .collect()
-        .await;
-
-    let errs: Vec<_> = res
-        .into_iter()
-        .filter_map(|res| res.err())
-        .map(|e| e.to_string())
-        .collect();
-
-    if !errs.is_empty() {
-        Err((
-            StatusCode::INTERNAL_SERVER_ERROR,
-            Json::from(json!({"error": errs})),
-        ))
-    } else {
-        Ok(StatusCode::OK)
-    }
-}
-
-/// Search a dir, return a list of markdown files
-///
-/// # Arguments
-/// * `entry`: dir path
-///
-/// # Returns
-/// Vec<String, Global>
-/// * `String`: path of a markdown file
-///
-fn search_md(entry: &Path) -> Vec<String> {
-    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.as_path())
-                })
-                .collect()
-        } else {
-            vec![]
-        }
-    } else if entry.extension().is_some_and(|ext| ext == "md") {
-        vec![entry.to_str().unwrap().to_string()]
-    } else {
-        vec![]
-    }
-}
-
-async fn build_post_idx(
-    db_connection: &PgPool,
-    post: Map<String, Value>,
-    hash: Vec<u8>,
-) -> Result<(), PostIdxError> {
-    let meta = &post["meta"];
-
-    // extract post id
-    let post_id = match Uuid::from_str(post["post_id"].as_str().unwrap()) {
-        Ok(id) => id,
-        Err(e) => {
-            return Err(PostIdxError::InvalidUUID {
-                id: post["post_id"].as_str().unwrap().to_string(),
-                err_msg: e.to_string(),
-            })
-        }
-    };
-
-    if build_post_idx::hash(db_connection, post_id, hash).await? {
-        build_post_idx::base(db_connection, &post, post_id, meta).await?;
-        build_post_idx::tag(db_connection, post_id, meta).await?;
-        build_post_idx::meta(db_connection, post_id, meta).await?;
-    }
-
-    Ok(())
-}

backend/src/api/post/utils/build_post_idx.rs

@@ -1,288 +0,0 @@
-use base64::{Engine, engine::general_purpose};
-use chrono::DateTime;
-use serde_json::{Map, Value};
-use sqlx::{PgPool, query, Row};
-use uuid::Uuid;
-
-use crate::api::post::errors::refresh::PostIdxError;
-use crate::constants::GLOBAL_TIME_FORMAT;
-
-pub async fn base(
-    db_connection: &PgPool,
-    post: &Map<String, Value>,
-    post_id: Uuid,
-    meta: &Value,
-) -> Result<(), PostIdxError> {
-    let title = post["title"].as_str();
-    let summary = post
-        .get("summary")
-        .and_then(|summary| summary.as_str())
-        .unwrap_or("");
-    let content = post["content"].as_str();
-    let last_update =
-        match DateTime::parse_from_str(post["last_update"].as_str().unwrap(), GLOBAL_TIME_FORMAT) {
-            Ok(time) => time,
-            Err(e) => {
-                return Err(PostIdxError::InvalidLastUpdate {
-                    id: post_id.to_string(),
-                    err_msg: e.to_string(),
-                });
-            }
-        };
-    let first_update = match DateTime::parse_from_str(
-        post["first_update"].as_str().unwrap(),
-        GLOBAL_TIME_FORMAT,
-    ) {
-        Ok(time) => time,
-        Err(e) => {
-            return Err(PostIdxError::InvalidFirstUpdate {
-                id: post_id.to_string(),
-                err_msg: e.to_string(),
-            })
-        }
-    };
-    let sub_title = meta
-        .get("sub_title")
-        .and_then(|sub_title| sub_title.as_str())
-        .unwrap_or("");
-    let category = meta
-        .get("category")
-        .and_then(|category| category.as_str())
-        .unwrap_or("N/A");
-    let header_img = meta
-        .get("header_img")
-        .and_then(|header_img| header_img.as_str())
-        .unwrap_or("");
-
-    match query(
-        r##"
-INSERT INTO Post (post_id, title, summary, content, last_update, first_update, sub_title, category, header_img)
-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,
-    header_img = EXCLUDED.header_img;
-        "##,
-    )
-        .bind(post_id)
-        .bind(title)
-        .bind(summary)
-        .bind(content)
-        .bind(last_update)
-        .bind(first_update)
-        .bind(sub_title)
-        .bind(category)
-        .bind(header_img)
-        .execute(db_connection)
-        .await
-    {
-        Ok(_) => {}
-        Err(e) => {
-            return Err(
-                PostIdxError::DBWriteFailure {
-                    data_desc: "post base information".to_string(),
-                    db_table: "Post".to_string(),
-                    id: post_id.to_string(),
-                    err_msg: e.to_string()
-                }
-            )
-        }
-    }
-
-    Ok(())
-}
-
-pub async fn tag(db_connection: &PgPool, post_id: Uuid, meta: &Value) -> Result<(), PostIdxError> {
-    if let Some(tags_string) = meta.get("tags").to_owned() {
-        // parse tags string
-        let parsed: Value = match serde_json::from_str(tags_string.as_str().unwrap()) {
-            Ok(value) => value,
-            Err(e) => {
-                return Err(PostIdxError::InvalidTagString {
-                    id: post_id.to_string(),
-                    invalid_string: tags_string.to_string().to_string(),
-                    err_msg: e.to_string(),
-                })
-            }
-        };
-        let string_array = parsed.as_array().unwrap();
-        let tags: Vec<String> = string_array
-            .iter()
-            .map(|value| value.as_str().unwrap().to_string())
-            .collect();
-
-        // 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(),
-                err_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(),
-                        err_msg: e.to_string(),
-                    })
-                }
-            }
-        }
-    }
-
-    Ok(())
-}
-
-/// # Arguments
-///
-/// * `db_connection`: database connection
-/// * `post_id`: UUID of the post
-/// * `hash`: Hex String
-///
-/// # Returns
-/// Result<bool, PostIdxError>
-/// - `bool`: if the hash is different from database, return true, else false
-pub async fn hash(
-    db_connection: &PgPool,
-    post_id: Uuid,
-    hash: Vec<u8>,
-) -> Result<bool, PostIdxError> {
-    let base64_form = general_purpose::STANDARD.encode(hash);
-    match query("SELECT hash FROM Hash WHERE post_id = $1")
-        .bind(post_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_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_id.to_string(),
-                        err_msg: e.to_string(),
-                    });
-                }
-                Ok(true)
-            }
-        }
-        Err(e) => Err(PostIdxError::DBReadFailure {
-            data_desc: "post hash".to_string(),
-            db_table: "Hash".to_string(),
-            id: post_id.to_string(),
-            err_msg: e.to_string(),
-        }),
-    }
-}
-
-pub async fn meta(db_connection: &PgPool, post_id: Uuid, meta: &Value) -> Result<(), PostIdxError> {
-    let mut err_trails = 5;
-    loop {
-        if let Err(e) = query(
-            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_id.to_string().as_str(), meta.to_string()
-            ).as_str()
-        )
-            .execute(db_connection)
-            .await {
-            if err_trails >= 0 {
-                err_trails -= 1;
-                continue
-            } else {
-                return Err(PostIdxError::DBWriteFailure {
-                    data_desc: "post meta data".to_string(),
-                    db_table: "Meta".to_string(),
-                    id: post_id.to_string(),
-                    err_msg: e.to_string(),
-                })
-            }
-        } else {
-            return Ok(())
-        }
-    }
-}

backend/src/api/post/utils/mod.rs

@@ -1,2 +0,0 @@
-pub mod build_post_idx;
-pub mod post;

backend/src/api/post/utils/post.rs

@@ -1,120 +0,0 @@
-use std::{env, fs};
-use std::error::Error;
-use std::process::Command;
-use std::str;
-use std::str::FromStr;
-
-use chrono::{DateTime, Utc};
-use serde_json::{Map, Value};
-use tracing::{error, warn};
-use uuid::Uuid;
-
-use crate::constants::GLOBAL_TIME_FORMAT;
-use crate::markdown::meta::parse_meta;
-
-pub fn from_path(path: &str) -> Result<Map<String, Value>, Box<dyn Error>> {
-    let mut res = Map::new();
-
-    // field `content`
-    let md_content = fs::read_to_string(path)?;
-    res.insert("content".to_string(), Value::from(md_content.to_owned()));
-
-    // field `meta`
-    let meta = parse_meta(&md_content);
-    let meta_map: Map<String, Value> = meta
-        .clone()
-        .into_iter()
-        .map(|(k, v)| (k, Value::from(v)))
-        .collect();
-    res.insert("meta".to_string(), Value::from(meta_map));
-
-    // field `post_id`
-    let post_id = match meta.get("id") {
-        None => Uuid::new_v4(),
-        Some(id) => match Uuid::from_str(id.as_str()) {
-            Ok(id) => id,
-            Err(e) => {
-                error!("Failed to parse UUID <{}>: {}", id.as_str(), e.to_string());
-                return Err(Box::new(e));
-            }
-        },
-    };
-    res.insert("post_id".to_string(), Value::from(post_id.to_string()));
-
-    // field `title`
-    let title = match meta.get("title") {
-        None => "Title Not Found".to_string(),
-        Some(title) => title.to_owned(),
-    };
-    res.insert("title".to_string(), Value::from(title));
-
-    // field `summary`
-    let summary = match meta.get("summary") {
-        None => "".to_string(),
-        Some(summary) => summary.to_owned(),
-    };
-    res.insert("summary".to_string(), Value::from(summary));
-
-    // field `last_update`
-    let git_output = match Command::new("git")
-        .arg("--no-pager")
-        .arg("log")
-        .arg("-1")
-        .arg("--format=%cI")
-        .arg("--")
-        .current_dir(env::var("GIT_WORK_DIR")?)
-        .arg(path)
-        .output()
-    {
-        Ok(res) => res,
-        Err(e) => {
-            error!("Failed to execute `git` command: {}", e.to_string());
-            return Err(Box::new(e));
-        }
-    };
-    let last_update: DateTime<Utc> = if git_output.status.success() {
-        chrono::DateTime::parse_from_str(
-            str::from_utf8(&git_output.stdout).unwrap().trim_end(),
-            GLOBAL_TIME_FORMAT,
-        )
-        .unwrap_or_else(|_| DateTime::from(Utc::now()))
-        .to_utc()
-    } else {
-        Utc::now().to_utc()
-    };
-    res.insert(
-        "last_update".to_string(),
-        Value::from(last_update.format(GLOBAL_TIME_FORMAT).to_string()),
-    );
-
-    // field `first_update`
-    let first_update: DateTime<Utc> = match meta.get("date") {
-        None => {
-            warn!(
-                "Failed to parse first update time for post {}, using current time instead",
-                post_id.to_string()
-            );
-            Utc::now().to_utc()
-        }
-        Some(date) => DateTime::from(
-            match DateTime::parse_from_str(format!("{}T000000", date).as_str(), "%Y-%m-%d%zT%H%M%S")
-            {
-                Ok(time) => time,
-                Err(e) => {
-                    warn!(
-                        "Failed to parse first update time for post {}, using current time instead: {}",
-                        post_id.to_string(),
-                        e.to_string()
-                    );
-                    DateTime::from(Utc::now())
-                }
-            },
-        ),
-    };
-    res.insert(
-        "first_update".to_string(),
-        Value::from(first_update.format(GLOBAL_TIME_FORMAT).to_string()),
-    );
-
-    Ok(res)
-}

backend/src/constants.rs

@@ -1,3 +0,0 @@
-pub const GLOBAL_TIME_FORMAT: &str = "%Y-%m-%dT%H:%M:%S%z";
-
-pub const PAGE_SIZE: u32 = 6;

backend/src/logger.rs

@@ -1,67 +0,0 @@
-use std::{env, io};
-
-use chrono::Local;
-use tracing::info;
-use tracing_appender::{non_blocking, rolling};
-use tracing_appender::non_blocking::WorkerGuard;
-use tracing_subscriber::{fmt, Registry};
-use tracing_subscriber::fmt::format::Writer;
-use tracing_subscriber::fmt::MakeWriter;
-use tracing_subscriber::fmt::time::FormatTime;
-use tracing_subscriber::layer::SubscriberExt;
-
-use crate::constants::GLOBAL_TIME_FORMAT;
-
-struct LocalTimer;
-
-impl FormatTime for LocalTimer {
-    fn format_time(&self, w: &mut Writer<'_>) -> std::fmt::Result {
-        write!(w, "{}", Local::now().format(GLOBAL_TIME_FORMAT))
-    }
-}
-
-type _LogWriter = dyn for<'writer> MakeWriter<'writer, Writer = dyn io::Write + 'static> + 'static;
-
-pub fn init() -> (WorkerGuard, WorkerGuard) {
-    let log_path = env::var("LOG_ROOT_DIR").unwrap_or_else(|e| {
-        panic!("[Fatal] failed to load LOG_ROOT_DIR: {}", e);
-    });
-
-    let log_path = format!("{}/backend", log_path);
-
-    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 log_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)
-                .with_ansi(false),
-        )
-        .with(
-            fmt::Layer::default()
-                .with_writer(err_log_writer)
-                .with_ansi(false),
-        )
-        .with(
-            fmt::Layer::default()
-                .with_writer(io::stdout)
-                .with_ansi(true)
-                .event_format(log_format),
-        );
-
-    tracing::subscriber::set_global_default(subscribers)
-        .expect("[Fatal] Failed to setup logging system");
-
-    info!("Module Started: Logger");
-
-    // error!("test");
-    (info_guard, error_guard)
-}

backend/src/main.rs

@@ -1,102 +0,0 @@
-use std::env;
-use std::error::Error;
-use std::num::ParseIntError;
-use std::process::exit;
-use std::str::FromStr;
-
-use crate::api::get::get_page_count::get_page_count;
-use crate::api::get::get_post::get_post;
-use crate::api::get::get_post_list::get_post_list;
-use crate::api::post::refresh::refresh;
-use axum::routing::{get, post};
-use axum::Router;
-use dotenv::dotenv;
-use sqlx::postgres::{PgConnectOptions, PgPoolOptions};
-use sqlx::ConnectOptions;
-use tracing::{error, info, warn};
-
-mod api;
-mod constants;
-mod logger;
-mod markdown;
-mod model;
-
-#[tokio::main]
-async fn main() -> Result<(), Box<dyn Error>> {
-    if let Some(env_file) = env::args().nth(1) {
-        match dotenv::from_filename(&env_file) {
-            Ok(_) => {
-                println!("[Info] env loaded from {}", env_file);
-            }
-            Err(e) => {
-                panic!("[Fatal] failed to read {}: {}", env_file, e);
-            }
-        }
-    };
-    match dotenv() {
-        Ok(_) => {
-            println!("[Info] env loaded from .env file, starting up...")
-        }
-        Err(_) => {
-            println!("[Info] .env not detected, starting up...")
-        }
-    };
-
-    let _guards = logger::init();
-
-    let port: u32 = match env::var("BACKEND_PORT") {
-        Ok(value) => value.parse().unwrap_or_else(|e: ParseIntError| {
-            warn!("Failed to parse BACKEND_PORT: {}", e.to_string());
-            3001
-        }),
-        Err(_) => 3001,
-    };
-
-    let db_connect_option = PgConnectOptions::from_str(dbg!(&parse_db_uri()))
-        .unwrap()
-        .disable_statement_logging();
-
-    let db_pool = match PgPoolOptions::new().connect_with(db_connect_option).await {
-        Ok(pool) => {
-            info!("Database connected");
-            pool
-        }
-        Err(e) => {
-            error!("Failed to load database: {}", e.to_string());
-            exit(1);
-        }
-    };
-
-    let app = Router::new()
-        .route("/refresh_posts", post(refresh))
-        .route("/get_post_list", get(get_post_list))
-        .route("/get_page_count", get(get_page_count))
-        .route("/get_post/:post_id", get(get_post))
-        .with_state(db_pool);
-
-    let listener = tokio::net::TcpListener::bind(format!("0.0.0.0:{}", port))
-        .await
-        .unwrap_or_else(|e| {
-            error!("Failed to build TCP listener: {}", e.to_string());
-            exit(1);
-        });
-
-    axum::serve(listener, app).await.unwrap_or_else(|e| {
-        error!("Failed to start axum: {}", e.to_string());
-        exit(1);
-    });
-
-    Ok(())
-}
-
-fn parse_db_uri() -> String {
-    let postgres_user = env::var("POSTGRES_USER").unwrap_or("".to_string());
-    let postgres_password = env::var("POSTGRES_PASSWORD").unwrap_or("".to_string());
-    let db_host = env::var("DB_HOST").unwrap_or("localhost".to_string());
-    let db_port = env::var("DB_PORT")
-        .unwrap_or("5432".to_string())
-        .to_string();
-    let postgres_db = env::var("POSTGRES_DB").unwrap_or("nocturne".to_string());
-
-    format!("postgresql://{postgres_user}:{postgres_password}@{db_host}:{db_port}/{postgres_db}")
-}

backend/src/markdown/meta.rs

@@ -1,55 +0,0 @@
-use std::collections::HashMap;
-
-use regex::Regex;
-
-/// return the meta info contained in the .md file front matter
-pub fn parse_meta(md_content: &str) -> HashMap<String, String> {
-    let mut fields: HashMap<String, String> = HashMap::new();
-    let match_regex = Regex::new(r"(?s)---\n(.*\n)---\n").unwrap();
-    if let Some(front_matter) = match_regex.captures(md_content) {
-        let fm_content = front_matter.get(1).unwrap().as_str();
-        for line in fm_content.lines() {
-            if let Some((k, v)) = extract_kv(line) {
-                fields.insert(k, v);
-            }
-        }
-    }
-    fields
-}
-
-fn extract_kv(line: &str) -> Option<(String, String)> {
-    let split: Vec<&str> = line.splitn(2, ':').map(|s| s.trim()).collect();
-    if split.len() == 2 {
-        let key = split[0].to_string();
-        let value = split[1].to_string();
-        Some((key, value))
-    } else {
-        None
-    }
-}
-
-#[cfg(test)]
-mod meta_test {
-    use std::error::Error;
-
-    use crate::markdown::meta::parse_meta;
-
-    #[test]
-    fn test_parse_meta_front_matter() -> Result<(), Box<dyn Error>> {
-        let parsed_meta = parse_meta(
-            r##"
----
-title: Hello World!
-tags: [ "test", "hello_world" ]
----
-            "##,
-        );
-        dbg!(&parsed_meta);
-        assert_eq!(parsed_meta.get("title"), Some(&"Hello World!".to_string()));
-        assert_eq!(
-            parsed_meta.get("tags"),
-            Some(&r#"[ "test", "hello_world" ]"#.to_string())
-        );
-        Ok(())
-    }
-}

backend/src/markdown/mod.rs

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

backend/src/model/blog/hash.sql

@@ -1,5 +0,0 @@
-CREATE TABLE IF NOT EXISTS Hash
-(
-    post_id UUID PRIMARY KEY,
-    hash    VARCHAR(44)
-);

backend/src/model/blog/meta.sql

@@ -1,79 +0,0 @@
-CREATE TABLE IF NOT EXISTS Meta
-(
-    post_id UUID PRIMARY KEY
-);
-
-DROP table meta;
-
-DO
-$$
-    DECLARE
-        _post_id        UUID   := '{}';
-        _meta_cols      JSONB  := '{}';
-        _exists         BOOLEAN;
-        _col_name       TEXT;
-        _col_value      TEXT;
-        _sql            TEXT;
-        _insert_columns TEXT   := 'post_id';
-        _insert_values  TEXT   := quote_literal(_post_id);
-        _update_set     TEXT   := '';
-        _blacklist      TEXT[] := ARRAY ['id', 'tags'];
-    BEGIN
-        SELECT EXISTS(SELECT 1 FROM meta WHERE post_id = _post_id) INTO _exists;
-
-        FOR _col_name, _col_value IN SELECT key, value FROM jsonb_each_text(_meta_cols)
-            LOOP
-                IF _col_name = ANY (_blacklist) THEN
-                    CONTINUE;
-                END IF;
-
-                IF NOT EXISTS (SELECT 1
-                               FROM information_schema.columns
-                               WHERE table_name = 'meta'
-                                 AND column_name = _col_name
-                                 -- may change in the future
-                                 AND table_schema = 'public') THEN
-                    _sql := 'ALTER TABLE meta ADD COLUMN ' || quote_ident(_col_name) || ' TEXT';
-                    EXECUTE _sql;
-                END IF;
-                _insert_columns := _insert_columns || ', ' || quote_ident(_col_name);
-                _insert_values := _insert_values || ', ' || quote_literal(_col_value);
-                _update_set := _update_set || ', ' || quote_ident(_col_name) || ' = ' || quote_literal(_col_value);
-            END LOOP;
-
-        _update_set := substring(_update_set FROM 3);
-
-        IF _exists THEN
-            _sql := 'UPDATE meta SET ' || _update_set || ' WHERE post_id = ' || quote_literal(_post_id);
-            EXECUTE _sql;
-        ELSE
-            _sql := 'INSERT INTO meta (' || _insert_columns || ') VALUES (' || _insert_values || ')';
-            EXECUTE _sql;
-        END IF;
-    END;
-$$ LANGUAGE plpgsql;
-
-SELECT jsonb_strip_nulls(to_jsonb(t)) AS meta
-FROM meta t
-WHERE post_id = '8ca3fa2b-f040-448c-8885-81aab56db9bb';
-
-WITH target_post AS (SELECT t.date FROM meta t WHERE post_id = '8ca3fa2b-f040-448c-8885-81aab56db9bb'),
-     prev AS (SELECT post_id, t.title, t.sub_title, t.header_img
-              FROM meta t
-              WHERE t.date < (SELECT date FROM target_post)
-              ORDER BY t.date DESC
-              LIMIT 1),
-     next AS (SELECT post_id, t.title, t.sub_title, t.header_img
-              FROM meta t
-              WHERE t.date > (SELECT date FROM target_post)
-              ORDER BY t.date
-              LIMIT 1)
-SELECT json_strip_nulls(json_build_object(
-        'prev',
-        (SELECT json_build_object('id', post_id, 'title', title, 'sub_title', sub_title, 'header_img', header_img)
-         FROM prev),
-        'next',
-        (SELECT json_build_object('id', post_id, 'title', title, 'sub_title', sub_title, 'header_img', header_img)
-         FROM next)
-                        )) AS result;
-

backend/src/model/blog/mod.rs

@@ -1,38 +0,0 @@
-pub const POST_BASE_MODEL: &str = r##"
-CREATE TABLE IF NOT EXISTS Post
-(
-    post_id      UUID PRIMARY KEY,
-    title        VARCHAR(255) NOT NULL,
-    category     VARCHAR(255) NOT NULL,
-    header_img   TEXT,
-    summary      TEXT,
-    sub_title    TEXT,
-    content      TEXT         NOT NULL,
-    last_update  TIMESTAMPTZ  NOT NULL,
-    first_update TIMESTAMPTZ  NOT NULL
-);
-"##;
-
-// base mode, will add more cols in runtime
-pub const POST_META_MODEL: &str = r##"
-CREATE TABLE IF NOT EXISTS Meta
-(
-    post_id      UUID PRIMARY KEY
-);
-"##;
-
-pub const POST_HASH_MODEL: &str = r##"
-CREATE TABLE IF NOT EXISTS Hash
-(
-    post_id      UUID PRIMARY KEY,
-    hash         VARCHAR(44)
-);
-"##;
-
-pub const TAG_MODEL: &str = r##"
-CREATE TABLE IF NOT EXISTS Tag
-(
-    post_id UUID         NOT NULL,
-    tag     VARCHAR(255) NOT NULL
-);
-"##;

backend/src/model/blog/post.sql

@@ -1,12 +0,0 @@
-CREATE TABLE IF NOT EXISTS Post
-(
-    post_id      UUID PRIMARY KEY,
-    title        VARCHAR(255) NOT NULL,
-    category     VARCHAR(255) NOT NULL,
-    header_img   TEXT,
-    summary      TEXT,
-    sub_title    TEXT,
-    content      TEXT         NOT NULL,
-    last_update  TIMESTAMPTZ  NOT NULL,
-    first_update TIMESTAMPTZ  NOT NULL
-);

backend/src/model/blog/tag.sql

@@ -1,5 +0,0 @@
-CREATE TABLE IF NOT EXISTS Tag
-(
-    post_id UUID         NOT NULL,
-    tag     VARCHAR(255) NOT NULL
-);

backend/src/model/mod.rs

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

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

@@ -5,7 +5,7 @@ services:
       dockerfile: ../container/dev/frontend.containerfile
     restart: always
     ports:
-      - 3000:3000
+      - "3000:3000"
     volumes:
       - ./frontend:/app
       - /app/node_modules
@@ -22,7 +22,7 @@ services:
       dockerfile: ../container/dev/backend.containerfile
     restart: always
     ports:
-      - 3001:3001
+      - "3001:3001"
     volumes:
       - ./blog_posts_git:/app/blog_posts_git:ro
     env_file:

frontend/.dockerignore

@@ -1,7 +1,7 @@
 /node_modules
 
-/.next/
-/out/
+/.next
+/out
 /build
 
 .DS_Store

frontend/app/blog/BlogPostCard.tsx

@@ -18,7 +18,7 @@ function BlogPostCard({ post }: Props) {
     // 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'];
+    let header_img = ((post as any)['header_img'] as string | null);
 
     return (
 
@@ -29,7 +29,7 @@ function BlogPostCard({ post }: Props) {
                   isHoverable
             >
 
-                { header_img !== '' && <div className={ `w-full overflow h-80 relative` }>
+                { header_img && <div className={ `w-full overflow h-80 relative` }>
                     <Image
                         alt={ 'cover picture' }
                         src={ header_img }
@@ -48,7 +48,7 @@ function BlogPostCard({ post }: Props) {
 
                 <CardBody className={ `overflow-visible` }>
                     <div className={ `flex flex-row justify-between` }>
-                        <div className={ `mx-2 ${ header_img !== '' ? '-mt-6' : 'mt-2' }` }>
+                        <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>

frontend/app/blog/PostList.tsx

@@ -8,8 +8,8 @@ import { Card, CardBody } from '@nextui-org/card';
 
 const PostList = async ({ page }: { page: number }) => {
     try {
-        const res = await fetchNocturneApi(`/get_post_list?page=${ page }`);
-        let posts = (await res.json() as any)['posts'];
+        const res = await fetchNocturneApi(`/blog/get_post_list?page=${ page }`);
+        const posts = await res.json();
         return (
             // blog list
             <div className={ 'w-full' }>

frontend/app/blog/page.tsx

@@ -2,15 +2,15 @@ import PostList from '@/app/blog/PostList';
 import Pagination from '@/app/blog/Pagination';
 import { fetchNocturneApi } from '@/app/blog/api';
 
-async function Blog({ searchParams }: {
-    searchParams?: {
-        page?: number
-    };
+async function Blog({
+    searchParams
+}: {
+    searchParams: Promise<{ [key: string]: string | string[] | undefined }>
 }) {
 
-    const parsePage = Number(searchParams?.page);
+    const parsePage = Number((await searchParams)?.page);
     const currPage = parsePage > 0 ? parsePage : 1;
-    const ret = await fetchNocturneApi(`/get_page_count`);
+    const ret = await fetchNocturneApi(`/blog/get_page_count`);
     const pageCount = (await ret.json() as any)['res'] as number;
 
     return (

frontend/app/blog/post/[id]/Footer.tsx

@@ -17,7 +17,7 @@ const Footer = (props: Props) => {
     const author = post['meta']['author'] ?? 'Tao';
     const author_link = post['meta']['author_link'] ?? '/about';
     const post_date = new Date(post['first_update']);
-    const update_date = new Date(post['last_update']);
+    const update_date: Date | undefined = post['last_update'] ? new Date(post['last_update']) : undefined;
     const cc = post['meta']['cc'] ?? 'by-nc-sa';
 
 
@@ -55,14 +55,16 @@ const Footer = (props: Props) => {
                                     year: `numeric`
                                 }) }</p>
                             </div>
-                            <div>
-                                <p className={ 'text-lg font-bold' }>Updated on</p>
-                                <p>{ update_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/` }>

frontend/app/blog/post/[id]/Headers.tsx

@@ -18,11 +18,11 @@ const Headers = (props: Props) => {
     // let last_update = new Date((post as any)['last_update']);
     let first_update = new Date(post['first_update']);
     // let post_id = (post as any)['post_id'];
-    let header_img = post['header_img'];
+    let header_img = post['meta']['header_img'] as string | null;
 
     return (
         <>
-            { header_img !== '' && <div className={ `w-full overflow h-96 relative` }>
+            { header_img && <div className={ `w-full overflow h-96 relative` }>
                 <Image
                     alt={ 'cover picture' }
                     src={ header_img }
@@ -38,11 +38,11 @@ const Headers = (props: Props) => {
             </div> }
 
             <div
-                className={ header_img !== '' ?
+                className={ 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={ header_img !== '' ? `p-4` : 'p-4 pt-2' }>
+                <div className={ header_img ? `p-4` : 'p-4 pt-2' }>
                     <Chip className={ `mb-2` } radius={ `sm` } color={ `secondary` }
                           variant={ `solid` }>{ category }</Chip>
                     <p className={ `text-4xl font-bold` }> { title }</p>

frontend/app/blog/post/[id]/PostCard.tsx

@@ -13,7 +13,7 @@ async function PostCard(props: Props) {
 
 
     try {
-        const res = await fetchNocturneApi(`/get_post/${ props.id }`);
+        const res = await fetchNocturneApi(`/blog/get_post/${ props.id }`);
         const ret: any = await res.json();
         return (
             <div>

frontend/app/blog/post/[id]/page.tsx

@@ -3,7 +3,11 @@ import PostCard from '@/app/blog/post/[id]/PostCard';
 import { MotionDiv } from '@/app/public/MotionDiv';
 import ButtonGoBack from '@/app/blog/post/[id]/ButtonGoBack';
 
-function BlogReader({ params }: { params: { id: string } }) {
+async function BlogReader({
+    params
+}: {
+    params: Promise<{ id: string }>
+}) {
 
     return (
         <MotionDiv
@@ -13,7 +17,7 @@ function BlogReader({ params }: { params: { id: string } }) {
             transition={ { ease: 'easeInOut', duration: 0.5 } }
         >
             <div className={ `max-w-full` }>
-                <PostCard id={ params.id } />
+                <PostCard id={ (await params).id } />
             </div>
             <div className={ 'mt-3' }>
                 <ButtonGoBack />

frontend/app/layout.tsx

@@ -8,7 +8,7 @@ import Footer from '@/components/Footer';
 
 export const metadata: Metadata = {
     title: 'Lumitherの酒馆',
-    description: '一间位于时间夹缝中的旅馆，静候下一位旅者的到来...'
+    description: '一间位于时间夹缝中的酒馆，静候下一位旅者的到来...'
 };
 
 export default function RootLayout({

frontend/components/Navbar.tsx

@@ -3,7 +3,16 @@
 import React, { useEffect, useState } from 'react';
 import { Button } from '@nextui-org/react';
 import Image from 'next/image';
-import { IoHome, IoInformationCircle, IoLink, IoLogoGithub, IoMail, IoPencil, IoSearch } from 'react-icons/io5';
+import {
+    IoFlask,
+    IoHome,
+    IoInformationCircle,
+    IoLink,
+    IoLogoGithub,
+    IoMail,
+    IoPencil,
+    IoSearch
+} from 'react-icons/io5';
 import Link from 'next/link';
 import ThemeSwitcher from '@/components/ThemeSwitcher';
 import { usePathname } from 'next/navigation';
@@ -34,6 +43,10 @@ const entries: { display_name: string; href: string; icon: React.ReactNode }[] =
         icon: <IoSearch size={ `20px` }></IoSearch>,
         display_name: 'Search',
         href: '/search'
+    }, {
+        icon: <IoFlask size={ '20px' } />,
+        display_name: 'Lab',
+        href: 'https://lab.lmt.moe'
     }
 ];
 
@@ -51,18 +64,6 @@ const connections: { label: string, href: string, icon: React.ReactNode }[] = [
 ];
 
 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);
-    //     };
-    // }, []);
-
 
     const path = usePathname();
     const [ shownPath, setShownPath ] = useState(path);

frontend/components/ThemeSwitcher.tsx

@@ -49,9 +49,9 @@ function ThemeSwitcher() {
                         fullWidth
                         isIconOnly={ isMobile }
                     >
-                        { switcherElements.get(currTheme.values().next().value)?.icon }
+                        { switcherElements.get(currTheme.values().next().value as string)?.icon }
                         <p className={ 'hidden lg:block' }>
-                            { switcherElements.get(currTheme.values().next().value)?.display_name }
+                            { switcherElements.get(currTheme.values().next().value as string)?.display_name }
                         </p>
                     </Button>
                 </DropdownTrigger>

frontend/next.config.mjs

@@ -11,8 +11,8 @@ const nextConfig = {
                 hostname: 'pic.re'
             }
         ]
-    }
-    // output: 'standalone'
+    },
+    output: 'standalone'
 };
 
 export default nextConfig;

frontend/package.json

@@ -13,7 +13,7 @@
     "@types/react-syntax-highlighter": "^15.5.13",
     "framer-motion": "^11.3.24",
     "lxgw-wenkai-webfont": "^1.7.0",
-    "next": "14.2.3",
+    "next": "^15.0.3",
     "next-themes": "^0.3.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",

prod.compose.yaml

@@ -0,0 +1,38 @@
+services:
+  frontend:
+    depends_on:
+      - backend
+    build:
+      context: ./frontend
+      dockerfile: ../container/release/frontend.containerfile
+    restart: always
+    ports:
+      - "3000:3000"
+    env_file:
+      - ./.env
+
+
+  backend:
+    depends_on:
+      - postgres
+    build:
+      context: ./backend
+      dockerfile: ../container/release/backend.containerfile
+      args:
+        ARCH: ${ARCH}
+    restart: always
+    ports:
+      - "3001:3001"
+    env_file:
+      - ./.env
+      - ./.env.local
+    dns:
+      - 1.1.1.1
+
+  postgres:
+    image: postgres:16.3
+    ports:
+      - "5432:5432"
+    env_file:
+      - ./.env
+      - ./.env.local