From cf2b95b7663346fa0492d6d43512b32b4db1488c Mon Sep 17 00:00:00 2001
From: Pinyoo Thotaboot <pinyoo@loolootech.com>
Date: Fri, 16 May 2025 16:30:50 +0700
Subject: [PATCH] Create webhook server implement for

---
 pr_agent/servers/gitea_app.py | 120 ++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 pr_agent/servers/gitea_app.py

diff --git a/pr_agent/servers/gitea_app.py b/pr_agent/servers/gitea_app.py
new file mode 100644
index 00000000..4df8b84c
--- /dev/null
+++ b/pr_agent/servers/gitea_app.py
@@ -0,0 +1,120 @@
+import asyncio
+import copy
+import os
+from typing import Any, Dict
+
+from fastapi import APIRouter, FastAPI, HTTPException, Request, Response
+from starlette.background import BackgroundTasks
+from starlette.middleware import Middleware
+from starlette_context import context
+from starlette_context.middleware import RawContextMiddleware
+
+from pr_agent.agent.pr_agent import PRAgent
+from pr_agent.config_loader import get_settings, global_settings
+from pr_agent.log import LoggingFormat, get_logger, setup_logger
+from pr_agent.servers.utils import verify_signature
+
+# Setup logging and router
+setup_logger(fmt=LoggingFormat.JSON, level=get_settings().get("CONFIG.LOG_LEVEL", "DEBUG"))
+router = APIRouter()
+
+@router.post("/api/v1/gitea_webhooks")
+async def handle_gitea_webhooks(background_tasks: BackgroundTasks, request: Request, response: Response):
+    """Handle incoming Gitea webhook requests"""
+    get_logger().debug("Received a Gitea webhook")
+
+    body = await get_body(request)
+
+    # Set context for the request
+    context["settings"] = copy.deepcopy(global_settings)
+    context["git_provider"] = {}
+
+    # Handle the webhook in background
+    background_tasks.add_task(handle_request, body, event=request.headers.get("X-Gitea-Event", None))
+    return {}
+
+async def get_body(request: Request):
+    """Parse and verify webhook request body"""
+    try:
+        body = await request.json()
+    except Exception as e:
+        get_logger().error("Error parsing request body", artifact={'error': e})
+        raise HTTPException(status_code=400, detail="Error parsing request body") from e
+
+
+    # Verify webhook signature
+    webhook_secret = getattr(get_settings().gitea, 'webhook_secret', None)
+    if webhook_secret:
+        body_bytes = await request.body()
+        signature_header = request.headers.get('x-gitea-signature', None)
+        verify_signature(body_bytes, webhook_secret, f"sha256={signature_header}")
+
+    return body
+
+async def handle_request(body: Dict[str, Any], event: str):
+    """Process Gitea webhook events"""
+    action = body.get("action")
+    if not action:
+        get_logger().debug("No action found in request body")
+        return {}
+
+    agent = PRAgent()
+
+    # Handle different event types
+    if event == "pull_request":
+        if action in ["opened", "reopened", "synchronized"]:
+            await handle_pr_event(body, event, action, agent)
+    elif event == "issue_comment":
+        if action == "created":
+            await handle_comment_event(body, event, action, agent)
+
+    return {}
+
+async def handle_pr_event(body: Dict[str, Any], event: str, action: str, agent: PRAgent):
+    """Handle pull request events"""
+    pr = body.get("pull_request", {})
+    if not pr:
+        return
+
+    api_url = pr.get("url")
+    if not api_url:
+        return
+
+    # Handle PR based on action
+    if action in ["opened", "reopened"]:
+        commands = get_settings().get("gitea.pr_commands", [])
+        for command in commands:
+            await agent.handle_request(api_url, command)
+    elif action == "synchronized":
+        # Handle push to PR
+        await agent.handle_request(api_url, "/review --incremental")
+
+async def handle_comment_event(body: Dict[str, Any], event: str, action: str, agent: PRAgent):
+    """Handle comment events"""
+    comment = body.get("comment", {})
+    if not comment:
+        return
+
+    comment_body = comment.get("body", "")
+    if not comment_body or not comment_body.startswith("/"):
+        return
+
+    pr_url = body.get("pull_request", {}).get("url")
+    if not pr_url:
+        return
+
+    await agent.handle_request(pr_url, comment_body)
+
+# FastAPI app setup
+middleware = [Middleware(RawContextMiddleware)]
+app = FastAPI(middleware=middleware)
+app.include_router(router)
+
+def start():
+    """Start the Gitea webhook server"""
+    port = int(os.environ.get("PORT", "3000"))
+    import uvicorn
+    uvicorn.run(app, host="0.0.0.0", port=port)
+
+if __name__ == "__main__":
+    start()