Started (incomplete) implementation of stream verification scheduler and endpoints

app/routers/playlist.py

@@ -1,15 +1,156 @@
-from fastapi import APIRouter, Depends
+import logging
+from enum import Enum
+from typing import Optional
+from uuid import uuid4
+
+from fastapi import APIRouter, BackgroundTasks, Depends, HTTPException, status
+from pydantic import BaseModel
+from sqlalchemy.orm import Session
 
 from app.auth.dependencies import get_current_user
+from app.iptv.stream_manager import StreamManager
 from app.models.auth import CognitoUser
+from app.utils.database import get_db_session
 
 router = APIRouter(prefix="/playlist", tags=["playlist"])
+logger = logging.getLogger(__name__)
+
+# In-memory store for validation processes
+validation_processes: dict[str, dict] = {}
 
 
-@router.get("/protected", summary="Protected endpoint for authenticated users")
-async def protected_route(user: CognitoUser = Depends(get_current_user)):
+class ProcessStatus(str, Enum):
+    PENDING = "pending"
+    IN_PROGRESS = "in_progress"
+    COMPLETED = "completed"
+    FAILED = "failed"
+
+
+class StreamValidationRequest(BaseModel):
+    """Request model for stream validation endpoint"""
+
+    channel_id: Optional[str] = None
+
+
+class ValidatedStream(BaseModel):
+    """Model for a validated working stream"""
+
+    channel_id: str
+    stream_url: str
+
+
+class ValidationProcessResponse(BaseModel):
+    """Response model for validation process initiation"""
+
+    process_id: str
+    status: ProcessStatus
+    message: str
+
+
+class ValidationResultResponse(BaseModel):
+    """Response model for validation results"""
+
+    process_id: str
+    status: ProcessStatus
+    working_streams: Optional[list[ValidatedStream]] = None
+    error: Optional[str] = None
+
+
+def run_stream_validation(process_id: str, channel_id: Optional[str], db: Session):
+    """Background task to validate streams"""
+    try:
+        validation_processes[process_id]["status"] = ProcessStatus.IN_PROGRESS
+        manager = StreamManager(db)
+
+        if channel_id:
+            stream_url = manager.validate_and_select_stream(channel_id)
+            if stream_url:
+                validation_processes[process_id]["result"] = {
+                    "working_streams": [
+                        ValidatedStream(channel_id=channel_id, stream_url=stream_url)
+                    ]
+                }
+            else:
+                validation_processes[process_id]["error"] = (
+                    f"No working streams found for channel {channel_id}"
+                )
+        else:
+            # TODO: Implement validation for all channels
+            validation_processes[process_id]["error"] = (
+                "Validation of all channels not yet implemented"
+            )
+
+        validation_processes[process_id]["status"] = ProcessStatus.COMPLETED
+
+    except Exception as e:
+        logger.error(f"Error validating streams: {str(e)}")
+        validation_processes[process_id]["status"] = ProcessStatus.FAILED
+        validation_processes[process_id]["error"] = str(e)
+
+
+@router.post(
+    "/validate-streams",
+    summary="Start stream validation process",
+    response_model=ValidationProcessResponse,
+    status_code=status.HTTP_202_ACCEPTED,
+    responses={202: {"description": "Validation process started successfully"}},
+)
+async def start_stream_validation(
+    request: StreamValidationRequest,
+    background_tasks: BackgroundTasks,
+    user: CognitoUser = Depends(get_current_user),
+    db: Session = Depends(get_db_session),
+):
     """
-    Protected endpoint that requires authentication for all users.
-    If the user is authenticated, returns success message.
+    Start asynchronous validation of streams.
+
+    - Returns immediately with a process ID
+    - Use GET /validate-streams/{process_id} to check status
     """
-    return {"message": f"Hello {user.username}, you have access to support resources!"}
+    process_id = str(uuid4())
+    validation_processes[process_id] = {
+        "status": ProcessStatus.PENDING,
+        "channel_id": request.channel_id,
+    }
+
+    background_tasks.add_task(run_stream_validation, process_id, request.channel_id, db)
+
+    return {
+        "process_id": process_id,
+        "status": ProcessStatus.PENDING,
+        "message": "Validation process started",
+    }
+
+
+@router.get(
+    "/validate-streams/{process_id}",
+    summary="Check validation process status",
+    response_model=ValidationResultResponse,
+    responses={
+        200: {"description": "Process status and results"},
+        404: {"description": "Process not found"},
+    },
+)
+async def get_validation_status(
+    process_id: str, user: CognitoUser = Depends(get_current_user)
+):
+    """
+    Check status of a stream validation process.
+
+    Returns current status and results if completed.
+    """
+    if process_id not in validation_processes:
+        raise HTTPException(status_code=404, detail="Process not found")
+
+    process = validation_processes[process_id]
+    response = {"process_id": process_id, "status": process["status"]}
+
+    if process["status"] == ProcessStatus.COMPLETED:
+        if "error" in process:
+            response["error"] = process["error"]
+        else:
+            response["working_streams"] = process["result"]["working_streams"]
+    elif process["status"] == ProcessStatus.FAILED:
+        response["error"] = process["error"]
+
+    return response