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1from fastapi import FastAPI, HTTPException, Header
2from pydantic import BaseModel
3from typing import Optional
4import secrets
5import datetime
6 
7app = FastAPI()
8 
9users = {}
10tokens = {}
11campaigns = {}
12next_user_id = 1
13next_campaign_id = 1
14 
15class SignupRequest(BaseModel):
16    email: str
17    password: str
18 
19class LoginRequest(BaseModel):
20    email: str
21    password: str
22 
23class CampaignCreate(BaseModel):
24    name: str
25    goal_amount: float
26    end_date: str
27    visibility: str = "public"
28    featured: bool = False
29 
30class CampaignUpdate(BaseModel):
31    name: Optional[str] = None
32    goal_amount: Optional[float] = None
33    end_date: Optional[str] = None
34    visibility: Optional[str] = None
35    featured: Optional[bool] = None
36 
37@app.post("/signup")
38def signup(req: SignupRequest):
39    global next_user_id
40    user_id = next_user_id
41    next_user_id += 1
42    users[user_id] = {"email": req.email, "password": req.password}
43    token = secrets.token_hex(16)
44    tokens[token] = user_id
45    return {"user_id": user_id, "token": token}
46 
47@app.post("/login")
48def login(req: LoginRequest):
49    for uid, u in users.items():
50        if u["email"] == req.email and u["password"] == req.password:
51            token = secrets.token_hex(16)
52            tokens[token] = uid
53            return {"token": token}
54    raise HTTPException(status_code=401, detail="Invalid credentials")
55 
56def get_current_user(authorization: str = Header(...)):
57    if authorization.startswith("Bearer "):
58        token = authorization[7:]
59    else:
60        token = authorization
61    user_id = tokens.get(token)
62    if user_id is None:
63        raise HTTPException(status_code=401, detail="Invalid token")
64    return user_id
65 
66@app.post("/campaigns")
67def create_campaign(campaign: CampaignCreate, user_id: int = Header(None)):
68    global next_campaign_id
69    cid = next_campaign_id
70    next_campaign_id += 1
71    campaigns[cid] = {
72        "id": cid,
73        "name": campaign.name,
74        "goal_amount": campaign.goal_amount,
75        "end_date": campaign.end_date,
76        "visibility": campaign.visibility,
77        "featured": campaign.featured,
78        "created_by": user_id
79    }
80    return campaigns[cid]
81 
82@app.get("/campaigns/{campaign_id}")
83def get_campaign(campaign_id: int):
84    camp = campaigns.get(campaign_id)
85    if not camp:
86        raise HTTPException(status_code=404, detail="Campaign not found")
87    return camp
88 
89@app.put("/campaigns/{campaign_id}")
90def update_campaign(campaign_id: int, update: CampaignUpdate):
91    camp = campaigns.get(campaign_id)
92    if not camp:
93        raise HTTPException(status_code=404, detail="Campaign not found")
94    if update.name is not None:
95        camp["name"] = update.name
96    if update.goal_amount is not None:
97        camp["goal_amount"] = update.goal_amount
98    if update.end_date is not None:
99        camp["end_date"] = update.end_date
100    if update.visibility is not None:
101        camp["visibility"] = update.visibility
102    if update.featured is not None:
103        camp["featured"] = update.featured
104    return camp

1fastapi
2uvicorn