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1from fastapi import FastAPI, HTTPException, Header
2from typing import Optional
3import hashlib
4import secrets
5 
6app = FastAPI()
7 
8users = {}
9donors = {}
10charities = {}
11donations = {}
12tokens = {}
13next_user_id = 1
14next_donor_id = 1
15next_charity_id = 1
16next_donation_id = 1
17 
18def get_current_user(authorization: Optional[str] = Header(None)):
19    if not authorization:
20        raise HTTPException(status_code=401, detail="Missing token")
21    token = authorization.replace("Bearer ", "")
22    if token not in tokens:
23        raise HTTPException(status_code=401, detail="Invalid token")
24    return tokens[token]
25 
26@app.post("/signup")
27def signup(username: str, password: str):
28    global next_user_id
29    for user in users.values():
30        if user["username"] == username:
31            raise HTTPException(status_code=400, detail="Username taken")
32    user_id = next_user_id
33    next_user_id += 1
34    users[user_id] = {"id": user_id, "username": username, "password": hashlib.sha256(password.encode()).hexdigest()}
35    return {"id": user_id, "username": username}
36 
37@app.post("/login")
38def login(username: str, password: str):
39    for user in users.values():
40        if user["username"] == username and user["password"] == hashlib.sha256(password.encode()).hexdigest():
41            token = secrets.token_hex(16)
42            tokens[token] = user["id"]
43            return {"token": token}
44    raise HTTPException(status_code=401, detail="Invalid credentials")
45 
46@app.post("/donors")
47def create_donor(name: str, email: str, authorization: Optional[str] = Header(None)):
48    get_current_user(authorization)
49    global next_donor_id
50    donor_id = next_donor_id
51    next_donor_id += 1
52    donors[donor_id] = {"id": donor_id, "name": name, "email": email}
53    return donors[donor_id]
54 
55@app.get("/donors/{donor_id}")
56def get_donor(donor_id: int, authorization: Optional[str] = Header(None)):
57    get_current_user(authorization)
58    if donor_id not in donors:
59        raise HTTPException(status_code=404, detail="Donor not found")
60    return donors[donor_id]
61 
62@app.post("/charities")
63def create_charity(name: str, description: str, authorization: Optional[str] = Header(None)):
64    get_current_user(authorization)
65    global next_charity_id
66    charity_id = next_charity_id
67    next_charity_id += 1
68    charities[charity_id] = {"id": charity_id, "name": name, "description": description}
69    return charities[charity_id]
70 
71@app.get("/charities/{charity_id}")
72def get_charity(charity_id: int, authorization: Optional[str] = Header(None)):
73    get_current_user(authorization)
74    if charity_id not in charities:
75        raise HTTPException(status_code=404, detail="Charity not found")
76    return charities[charity_id]
77 
78@app.post("/donations")
79def create_donation(amount: float, donor_id: int, charity_id: int, authorization: Optional[str] = Header(None)):
80    get_current_user(authorization)
81    if donor_id not in donors:
82        raise HTTPException(status_code=404, detail="Donor not found")
83    if charity_id not in charities:
84        raise HTTPException(status_code=404, detail="Charity not found")
85    global next_donation_id
86    donation_id = next_donation_id
87    next_donation_id += 1
88    donations[donation_id] = {"id": donation_id, "amount": amount, "donor_id": donor_id, "charity_id": charity_id}
89    return donations[donation_id]
90 
91@app.get("/donations/{donation_id}")
92def get_donation(donation_id: int, authorization: Optional[str] = Header(None)):
93    get_current_user(authorization)
94    if donation_id not in donations:
95        raise HTTPException(status_code=404, detail="Donation not found")
96    return donations[donation_id]

1fastapi
2uvicorn