feat(blog::components::check+update) update

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

@@ -0,0 +1,147 @@
+use crate::modules::blog::components::check_update::changes::{Change, DeltaIdx};
+use crate::modules::blog::components::check_update::error::Error;
+use crate::utils::git;
+use crate::utils::git::FileDelta;
+use git2::{Delta, Repository};
+use markdown::MdFile;
+use std::collections::HashMap;
+use std::path::{Path, PathBuf};
+use tracing::error;
+use uuid::Uuid;
+
+pub async fn fetch_deltas(
+    git_url: &str,
+    git_remote_name: &str,
+    git_branch: &str,
+    git_work_dir: &PathBuf,
+) -> Result<Vec<FileDelta>, Error> {
+    let repo = match Repository::open(git_work_dir) {
+        Ok(repo) => repo,
+        Err(_) => match Repository::clone(git_url, git_work_dir) {
+            Ok(repo) => repo,
+            Err(e) => {
+                error!("failed to clone blog content git({}): {}", &git_url, e);
+                return Err(e.into());
+            }
+        },
+    };
+
+    let updates = match git::sync(git_remote_name, git_branch, &repo) {
+        Ok(updates) => updates,
+        Err(e) => {
+            error!(
+                "failed to sync blog content git({}) updates: {}",
+                &git_url, e
+            );
+            return Err(e.into());
+        }
+    };
+
+    Ok(updates)
+}
+
+pub async fn analyze_deltas(file_deltas: Vec<FileDelta>, git_work_dir: &Path) -> Vec<Change> {
+    dbg!(&file_deltas);
+    let mut changes: Vec<Change> = vec![];
+    let mut merge_deltas: Vec<FileDelta> = vec![];
+
+    for delta in file_deltas.into_iter() {
+        if delta.status == Delta::Modified {
+            let file_path = &git_work_dir.join(
+                delta
+                    .new_path
+                    .expect("cannot parse modified post `new_path`"),
+            );
+            let post = match MdFile::from_file(file_path) {
+                Ok(post) => post,
+                Err(e) => {
+                    error!("md file parsing error: {}", e);
+                    continue;
+                }
+            };
+
+            let id = match extract_post_id(&post) {
+                Some(id) => id,
+                None => {
+                    // todo: add to unresolved error list
+                    error!(
+                        "failed to parse uuid on post {}",
+                        file_path.to_string_lossy()
+                    );
+                    continue;
+                }
+            };
+
+            changes.push(Change::UPDATE {
+                uuid: id,
+                content: post.content,
+            })
+        } else {
+            merge_deltas.push(delta)
+        };
+    }
+
+    // merge some addition and remove deltas to rename/move changes
+    let delta_idx = {
+        let mut delta_idx: HashMap<Uuid, Vec<DeltaIdx>> = HashMap::new();
+        for file_delta in merge_deltas.into_iter() {
+            let file_path = &git_work_dir.join(
+                file_delta
+                    .new_path
+                    .expect("cannot parse modified post `new_path`"),
+            );
+            match file_delta.status {
+                // todo: split impl
+                Delta::Added | Delta::Deleted => {
+                    let file_path_str = file_path.to_string_lossy();
+
+                    let post = match MdFile::from_file(file_path) {
+                        Ok(post) => post,
+                        Err(e) => {
+                            error!("md file parsing error ({}): {}", file_path_str, e);
+                            continue;
+                        }
+                    };
+
+                    let id = match extract_post_id(&post) {
+                        Some(id) => id,
+                        None => {
+                            // todo: add to unresolved error list
+                            error!("failed to parse uuid on post {}", file_path_str);
+                            continue;
+                        }
+                    };
+
+                    let file_delta_idx = DeltaIdx {
+                        delta_type: file_delta.status,
+                        content: post.content,
+                    };
+                    delta_idx
+                        .entry(id)
+                        // todo: change to shallow copy
+                        .and_modify(|v| v.push(file_delta_idx.clone()))
+                        .or_insert(vec![file_delta_idx]);
+                }
+                _ => {
+                    error!("unsupported delta on file {}", file_path.to_string_lossy());
+                    continue;
+                }
+            };
+        }
+        delta_idx
+    };
+
+    dbg!(&delta_idx);
+
+    changes
+}
+
+fn extract_post_id(post: &MdFile) -> Option<Uuid> {
+    match post.meta["uuid"].as_str() {
+        Some(id) => match Uuid::parse_str(id) {
+            Ok(id) => Some(id),
+            Err(_) => None,
+        },
+        None => None,
+    }
+}