Add live logs to admin dashboard with level filtering and error middleware

backend/app/api/endpoints/admin.py

@@ -1,6 +1,8 @@
+import logging
+import io
 from datetime import datetime, timezone, timedelta
 
-from fastapi import APIRouter, Depends, HTTPException
+from fastapi import APIRouter, Depends, HTTPException, Query
 from sqlalchemy import select, func
 from sqlalchemy.ext.asyncio import AsyncSession
 
@@ -15,6 +17,39 @@ router = APIRouter(prefix="/admin", tags=["admin"])
 
 ADMIN_EMAILS = ["chris.ryan@deepcutsai.com"]
 
+# In-memory log buffer for admin viewing
+LOG_BUFFER_SIZE = 500
+_log_buffer: list[dict] = []
+
+
+class AdminLogHandler(logging.Handler):
+    """Captures log records into an in-memory buffer for the admin UI."""
+
+    def emit(self, record):
+        entry = {
+            "timestamp": datetime.fromtimestamp(record.created, tz=timezone.utc).isoformat(),
+            "level": record.levelname,
+            "logger": record.name,
+            "message": self.format(record),
+        }
+        _log_buffer.append(entry)
+        if len(_log_buffer) > LOG_BUFFER_SIZE:
+            _log_buffer.pop(0)
+
+
+# Attach handler to root logger and uvicorn
+_handler = AdminLogHandler()
+_handler.setLevel(logging.INFO)
+_handler.setFormatter(logging.Formatter("%(message)s"))
+logging.getLogger().addHandler(_handler)
+logging.getLogger("uvicorn.access").addHandler(_handler)
+logging.getLogger("uvicorn.error").addHandler(_handler)
+logging.getLogger("app").addHandler(_handler)
+
+# Create app logger for explicit logging
+app_logger = logging.getLogger("app")
+app_logger.setLevel(logging.INFO)
+
 
 @router.get("/stats")
 async def get_stats(
@@ -98,3 +133,19 @@ async def get_stats(
         },
         "user_breakdown": user_breakdown,
     }
+
+
+@router.get("/logs")
+async def get_logs(
+    user: User = Depends(get_current_user),
+    level: str = Query("ALL", description="Filter by level: ALL, ERROR, WARNING, INFO"),
+    limit: int = Query(100, description="Number of log entries"),
+):
+    if user.email not in ADMIN_EMAILS:
+        raise HTTPException(status_code=403, detail="Admin only")
+
+    logs = _log_buffer[-limit:]
+    if level != "ALL":
+        logs = [l for l in logs if l["level"] == level.upper()]
+
+    return {"logs": list(reversed(logs)), "total": len(_log_buffer)}

backend/app/main.py

@@ -1,5 +1,9 @@
-from fastapi import FastAPI
+import logging
+import traceback
+
+from fastapi import FastAPI, Request
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
 
 from app.core.config import settings
 from app.api.endpoints import admin, auth, bandcamp, billing, lastfm, manual_import, playlist_fix, playlists, profile, recommendations, youtube_music
@@ -27,6 +31,21 @@ app.include_router(bandcamp.router, prefix="/api")
 app.include_router(profile.router, prefix="/api")
 
 
+logger = logging.getLogger("app")
+
+
+@app.middleware("http")
+async def log_errors(request: Request, call_next):
+    try:
+        response = await call_next(request)
+        if response.status_code >= 400:
+            logger.warning(f"{request.method} {request.url.path} -> {response.status_code}")
+        return response
+    except Exception as e:
+        logger.error(f"{request.method} {request.url.path} -> 500: {e}\n{traceback.format_exc()}")
+        return JSONResponse(status_code=500, content={"detail": "Internal server error"})
+
+
 @app.get("/api/health")
 async def health():
     return {"status": "ok", "app": "vynl"}