Update main.py

main.py

@@ -3,6 +3,7 @@ from pydantic import BaseModel
 from motor.motor_asyncio import AsyncIOMotorClient
 from typing import List
 from fastapi.middleware.cors import CORSMiddleware
+from datetime import datetime, timezone
 import os, re
 
 # ─── MongoDB connection ────────────────────────────────────────────────────────
@@ -25,6 +26,7 @@ app.add_middleware(
 client = AsyncIOMotorClient(MONGO_URI)
 db = client.disease
 disease_collection = db.diseases
+meta_collection = db.meta
 
 # ─── Pydantic schemas ─────────────────────────────────────────────────────────
 
@@ -192,6 +194,32 @@ def welcome():
     return {"message": "Sarva AI Remediation API. Visit /docs for documentation."}
 
 
+@app.get("/kotlinback/meta/last-edited")
+async def get_last_edited():
+    """
+    Returns the global lastEdited timestamp for all remediation data.
+    The Android app uses this to decide whether to fetch fresh data.
+    If no meta document exists yet, one is created with the current UTC time.
+    """
+    doc = await meta_collection.find_one({"_id": "global"})
+    if doc is None:
+        now = datetime.now(timezone.utc).strftime("%Y-%m-%dT%H:%M:%SZ")
+        await meta_collection.insert_one({"_id": "global", "lastEdited": now})
+        return {"lastEdited": now}
+    return {"lastEdited": doc["lastEdited"]}
+
+
+@app.get("/kotlinback/all")
+async def get_all_diseases(lang: str = "en"):
+    """
+    Returns all disease remediation documents in a single request.
+    The Android app calls this when a lastEdited version mismatch is detected
+    and bulk-caches all results to avoid one-by-one fetches.
+    """
+    diseases = await disease_collection.find({}).to_list(length=None)
+    return [build_disease_response(d, lang).dict() for d in diseases]
+
+
 @app.get("/check/{plant_name}")
 async def check(plant_name: str):
     return {"plantName": plant_name}