From 5bf6d24733726dfcb7afa08a1df393d4824e86b6 Mon Sep 17 00:00:00 2001
From: Lumither Tao <lumither@outlook.com>
Date: Mon, 14 Apr 2025 15:41:02 -0700
Subject: [PATCH] feat(blog::components::check_update, README.md) add tracking
 filter

---
 backend/server/Cargo.toml                     |  1 +
 ...ost_by_i64_id.sql => get_post_by_uuid.sql} |  0
 .../blog/components/check_update/pull.rs      | 24 ++++++++++++++-----
 .../server/src/modules/blog/components/mod.rs |  4 ++--
 4 files changed, 21 insertions(+), 8 deletions(-)
 rename backend/server/src/modules/blog/api/get_post/{get_post_by_i64_id.sql => get_post_by_uuid.sql} (100%)

diff --git a/backend/server/Cargo.toml b/backend/server/Cargo.toml
index f8e7c9a..0d60478 100644
--- a/backend/server/Cargo.toml
+++ b/backend/server/Cargo.toml
@@ -20,6 +20,7 @@ tracing-appender = "0.2.3"
 dirs = "6.0.0"
 thiserror = "2.0.11"
 tokio = { version = "1.42.0", features = ["rt", "rt-multi-thread", "macros", "sync"] }
+regex = "1.11.1"
 dotenv = "0.15.0"
 uuid = { version = "1.13.2", features = ["v4"] }
 futures = "0.3.31"
diff --git a/backend/server/src/modules/blog/api/get_post/get_post_by_i64_id.sql b/backend/server/src/modules/blog/api/get_post/get_post_by_uuid.sql
similarity index 100%
rename from backend/server/src/modules/blog/api/get_post/get_post_by_i64_id.sql
rename to backend/server/src/modules/blog/api/get_post/get_post_by_uuid.sql
diff --git a/backend/server/src/modules/blog/components/check_update/pull.rs b/backend/server/src/modules/blog/components/check_update/pull.rs
index e52cdc1..53e37e9 100644
--- a/backend/server/src/modules/blog/components/check_update/pull.rs
+++ b/backend/server/src/modules/blog/components/check_update/pull.rs
@@ -1,3 +1,4 @@
+use std::sync::LazyLock;
 use std::{collections::HashMap, fs::remove_dir_all, path::PathBuf};
 
 use crate::{
@@ -10,6 +11,7 @@ use crate::{
 use markdown::MdFile;
 
 use git2::{Delta, Repository};
+use regex::Regex;
 use tracing::{error, warn};
 use uuid::Uuid;
 
@@ -64,14 +66,17 @@ pub async fn fetch_deltas(
 
     // process deleted deltas before merging commit to prevent "file not found" os error
     for delta in commit_deltas.into_iter() {
-        // todo: limit scanning scope to post only OR extract merging logic to external component
+        let relative_file_path = delta
+            .new_path
+            .clone()
+            .expect("cannot parse modified post `new_path`");
+
+        if !should_delta_tracked(&relative_file_path) {
+            continue;
+        }
 
         if delta.status == Delta::Deleted {
-            let file_path = &git_work_dir.join(
-                delta
-                    .new_path
-                    .expect("cannot parse modified post `new_path`"),
-            );
+            let file_path = &git_work_dir.join(relative_file_path);
             if let Some(id) = extract_post_id(&MdFile::from_file(file_path)?) {
                 changes.push(Change::Delete(Delete {
                     uuid: id,
@@ -169,3 +174,10 @@ fn merge_changes(changes: Vec<Change>) -> Vec<Change> {
 
     merged
 }
+
+static TRACKED_DELTA_RULE: LazyLock<Regex> =
+    LazyLock::new(|| Regex::new(r"posts/\d{4}/[a-zA-Z0-9-]+/index\.md").unwrap());
+
+fn should_delta_tracked(path: &PathBuf) -> bool {
+    TRACKED_DELTA_RULE.is_match(path.to_str().unwrap())
+}
diff --git a/backend/server/src/modules/blog/components/mod.rs b/backend/server/src/modules/blog/components/mod.rs
index 0f3bc78..fb2e2dd 100644
--- a/backend/server/src/modules/blog/components/mod.rs
+++ b/backend/server/src/modules/blog/components/mod.rs
@@ -1,3 +1,3 @@
 pub mod check_update;
-mod consistency_guard;
-mod rag;
+pub mod consistency_guard;
+pub mod rag;