feat: implement blog project with CI pipeline

app/common/error_handler.py

@@ -0,0 +1,48 @@
+from datetime import datetime, timezone
+
+from fastapi import FastAPI, Request
+from fastapi.responses import JSONResponse
+from pydantic import BaseModel
+from starlette.exceptions import HTTPException
+
+from app.core.exceptions import AppException
+
+
+class ErrorResponse(BaseModel):
+    status_code: int
+    message: str
+    details: dict[str, str] | None = None
+    timestamp: str
+
+
+async def app_exception_handler(request: Request, exc: AppException) -> JSONResponse:
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={
+            "status_code": exc.status_code,
+            "message": exc.message,
+            "timestamp": datetime.now(timezone.utc).isoformat(),
+        },
+    )
+
+
+async def http_exception_handler(request: Request, exc: HTTPException) -> JSONResponse:
+    return JSONResponse(
+        status_code=exc.status_code,
+        content={
+            "status_code": exc.status_code,
+            "message": str(exc.detail),
+            "timestamp": datetime.now(timezone.utc).isoformat(),
+        },
+    )
+
+
+def register_exception_handlers(app: FastAPI) -> None:
+    app.add_exception_handler(
+        AppException,
+        app_exception_handler,  # type: ignore[arg-type]
+    )
+    app.add_exception_handler(
+        HTTPException,
+        http_exception_handler,  # type: ignore[arg-type]
+    )