first commit

api/main.py

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+from fastapi import FastAPI, HTTPException
+from pydantic import BaseModel
+from typing import List, Optional
+import uvicorn
+from datetime import datetime
+
+app = FastAPI(
+    title="API Demo Application",
+    description="Demo API with Swagger documentation",
+    version="1.0.0"
+)
+
+# Models
+class Item(BaseModel):
+    id: Optional[int] = None
+    name: str
+    description: Optional[str] = None
+    price: float
+    in_stock: bool = True
+
+class User(BaseModel):
+    id: Optional[int] = None
+    username: str
+    email: str
+    active: bool = True
+
+# In-memory storage
+items_db = [
+    {"id": 1, "name": "Laptop", "description": "High-performance laptop", "price": 999.99, "in_stock": True},
+    {"id": 2, "name": "Mouse", "description": "Wireless mouse", "price": 29.99, "in_stock": True},
+    {"id": 3, "name": "Keyboard", "description": "Mechanical keyboard", "price": 79.99, "in_stock": False},
+]
+
+users_db = [
+    {"id": 1, "username": "john_doe", "email": "john@example.com", "active": True},
+    {"id": 2, "username": "jane_smith", "email": "jane@example.com", "active": True},
+]
+
+# Root endpoint
+@app.get("/")
+async def root():
+    """Root endpoint with API information"""
+    return {
+        "message": "Welcome to API Demo",
+        "version": "1.0.0",
+        "docs": "/docs",
+        "timestamp": datetime.now().isoformat()
+    }
+
+# Health check
+@app.get("/health")
+async def health():
+    """Health check endpoint"""
+    return {"status": "healthy", "service": "api", "timestamp": datetime.now().isoformat()}
+
+# Items endpoints
+@app.get("/items", response_model=List[Item], tags=["Items"])
+async def get_items():
+    """Get all items"""
+    return items_db
+
+@app.get("/items/{item_id}", response_model=Item, tags=["Items"])
+async def get_item(item_id: int):
+    """Get a specific item by ID"""
+    item = next((item for item in items_db if item["id"] == item_id), None)
+    if item is None:
+        raise HTTPException(status_code=404, detail="Item not found")
+    return item
+
+@app.post("/items", response_model=Item, tags=["Items"])
+async def create_item(item: Item):
+    """Create a new item"""
+    new_id = max([i["id"] for i in items_db]) + 1 if items_db else 1
+    item_dict = item.dict()
+    item_dict["id"] = new_id
+    items_db.append(item_dict)
+    return item_dict
+
+@app.put("/items/{item_id}", response_model=Item, tags=["Items"])
+async def update_item(item_id: int, item: Item):
+    """Update an existing item"""
+    for idx, existing_item in enumerate(items_db):
+        if existing_item["id"] == item_id:
+            item_dict = item.dict()
+            item_dict["id"] = item_id
+            items_db[idx] = item_dict
+            return item_dict
+    raise HTTPException(status_code=404, detail="Item not found")
+
+@app.delete("/items/{item_id}", tags=["Items"])
+async def delete_item(item_id: int):
+    """Delete an item"""
+    for idx, item in enumerate(items_db):
+        if item["id"] == item_id:
+            items_db.pop(idx)
+            return {"message": "Item deleted successfully"}
+    raise HTTPException(status_code=404, detail="Item not found")
+
+# Users endpoints
+@app.get("/users", response_model=List[User], tags=["Users"])
+async def get_users():
+    """Get all users"""
+    return users_db
+
+@app.get("/users/{user_id}", response_model=User, tags=["Users"])
+async def get_user(user_id: int):
+    """Get a specific user by ID"""
+    user = next((user for user in users_db if user["id"] == user_id), None)
+    if user is None:
+        raise HTTPException(status_code=404, detail="User not found")
+    return user
+
+@app.post("/users", response_model=User, tags=["Users"])
+async def create_user(user: User):
+    """Create a new user"""
+    new_id = max([u["id"] for u in users_db]) + 1 if users_db else 1
+    user_dict = user.dict()
+    user_dict["id"] = new_id
+    users_db.append(user_dict)
+    return user_dict
+
+if __name__ == "__main__":
+    uvicorn.run(app, host="0.0.0.0", port=8001)