Add per-page history endpoint and file-scoped diff filter

edit/server.py

@@ -41,9 +41,10 @@ _SESSION_DOMAIN = os.environ.get("SESSION_DOMAIN") or None
 _SESSION_TTL    = 30 * 24 * 3600  # 30 days (matches bincio_activity)
 _SESSION_COOKIE = "bincio_session"
 
-_SAFE_SLUG   = re.compile(r"^[a-zA-Z0-9_][a-zA-Z0-9_\-/]*$")
-_SAFE_HANDLE = re.compile(r"^[a-z][a-z0-9_-]{1,19}$")
-_SAFE_HASH   = re.compile(r"^[0-9a-f]{4,40}$")
+_SAFE_SLUG     = re.compile(r"^[a-zA-Z0-9_][a-zA-Z0-9_\-/]*$")
+_SAFE_HANDLE   = re.compile(r"^[a-z][a-z0-9_-]{1,19}$")
+_SAFE_HASH     = re.compile(r"^[0-9a-f]{4,40}$")
+_SAFE_REL_PATH = re.compile(r"^(pages|blog)/[a-zA-Z0-9_][a-zA-Z0-9_\-/]*\.md$")
 _ALLOWED_IMAGE_TYPES = {"image/jpeg", "image/png", "image/webp", "image/gif"}
 _MAX_IMAGE_BYTES = 10 * 1024 * 1024  # 10 MB
 
@@ -288,12 +289,15 @@ async def get_wiki_log(user: User = Depends(require_auth)) -> JSONResponse:
 
 
 @app.get("/api/diff/{commit_hash}")
-async def get_diff(commit_hash: str, user: User = Depends(require_auth)) -> JSONResponse:
+async def get_diff(commit_hash: str, file: Optional[str] = None, user: User = Depends(require_auth)) -> JSONResponse:
     if not _SAFE_HASH.match(commit_hash):
         raise HTTPException(status_code=400, detail="invalid hash")
+    if file is not None and not _SAFE_REL_PATH.match(file):
+        raise HTTPException(status_code=400, detail="invalid file path")
+    paths = [file] if file else ["pages/", "blog/"]
     env = _git_env()
     proc = await asyncio.create_subprocess_exec(
-        "git", "show", commit_hash, "-p", "--no-color", "--format=", "--", "pages/", "blog/",
+        "git", "show", commit_hash, "-p", "--no-color", "--format=", "--", *paths,
         cwd=str(_ROOT), env=env,
         stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE,
     )
@@ -303,6 +307,26 @@ async def get_diff(commit_hash: str, user: User = Depends(require_auth)) -> JSON
     return JSONResponse({"diff": stdout.decode(errors="replace")})
 
 
+@app.get("/api/history/{slug:path}")
+async def get_history(slug: str, user: User = Depends(require_auth)) -> JSONResponse:
+    if not _SAFE_SLUG.match(slug):
+        raise HTTPException(status_code=400, detail="invalid slug")
+    env = _git_env()
+    proc = await asyncio.create_subprocess_exec(
+        "git", "log", "--format=%h|%ar|%aN|%s", "--author=@bincio.wiki", "-n", "50",
+        "--", f"pages/{slug}.md", f"blog/{slug}.md",
+        cwd=str(_ROOT), env=env,
+        stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.DEVNULL,
+    )
+    stdout, _ = await proc.communicate()
+    entries = []
+    for line in stdout.decode().strip().splitlines():
+        parts = line.split("|", 3)
+        if len(parts) == 4:
+            entries.append({"hash": parts[0], "date": parts[1], "author": parts[2], "message": parts[3]})
+    return JSONResponse({"log": entries})
+
+
 @app.get("/api/me")
 async def me(user: User = Depends(require_auth)) -> JSONResponse:
     return JSONResponse({