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from fastapi import FastAPI, HTTPException
from fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from typing import Dict
import uuid
from datetime import datetime
app = FastAPI()
# Enable CORS for React Native development
app.add_middleware(
CORSMiddleware,
allow_origins=["*"],
allow_methods=["*"],
allow_headers=["*"],
)
# In-memory "database" (replace with real DB in production)
jobs_db: Dict[str, Dict] = {}
class PostRequest(BaseModel):
query: str
topic: str
date: str # Format: "DD-MM-YYYY to DD-MM-YYYY"
@app.post("/index")
async def create_job(request: PostRequest):
"""Receive query/topic/date and return job ID"""
job_id = str(uuid.uuid4())
# Store the job (simulating background processing)
jobs_db[job_id] = {
"status": "processing",
"request": request.dict(),
"created_at": datetime.now().isoformat(),
"result": None
}
# Simulate processing completion after 5 seconds
# In real apps, use Celery/BackgroundTasks
jobs_db[job_id]["result"] = {
"query": request.query,
"topic": request.topic,
"date_interval": request.date,
"processed_data": f"Analysis result for {request.query} ({request.topic})"
}
jobs_db[job_id]["status"] = "completed"
return {"status": "success", "id": job_id}
@app.get("/loading")
async def get_results(id: str):
"""Check job status with simulated processing delay"""
if id not in jobs_db:
raise HTTPException(status_code=404, detail="Job not found")
job = jobs_db[id]
# Simulate variable processing time (5-25 seconds)
if job["status"] == "processing":
elapsed = (datetime.now() - datetime.fromisoformat(job["created_at"])).seconds
if elapsed < 5: # Minimum processing time
await asyncio.sleep(2) # Artificial delay
return {"status": "processing"}
# Mark as completed after random time (for demo)
if elapsed > 15 or random.random() > 0.7: # 30% chance after 15s
job["status"] = "completed"
job["result"] = {
"processed_data": f"Result for {job['request']['query']}",
"completion_time": elapsed
}
if job["status"] == "completed":
return {
"status": "completed",
"result": job["result"],
"request": job["request"]
}
return {"status": "processing"} |