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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 = {}
11members = {}
12next_user_id = 1
13next_member_id = 1
14member_change_log = []
15 
16class SignupRequest(BaseModel):
17    username: str
18    password: str
19 
20class LoginRequest(BaseModel):
21    username: str
22    password: str
23 
24class MemberCreate(BaseModel):
25    name: str
26    emergency_contact: Optional[str] = None
27    membership_tier: Optional[str] = None
28 
29class MemberUpdate(BaseModel):
30    name: Optional[str] = None
31    emergency_contact: Optional[str] = None
32    membership_tier: Optional[str] = None
33 
34def get_current_user(authorization: str = Header(...)):
35    if not authorization.startswith("Bearer "):
36        raise HTTPException(status_code=401, detail="Invalid auth header")
37    token = authorization[7:]
38    if token not in tokens:
39        raise HTTPException(status_code=401, detail="Invalid token")
40    return tokens[token]
41 
42@app.post("/signup")
43def signup(req: SignupRequest):
44    global next_user_id
45    user_id = next_user_id
46    next_user_id += 1
47    users[user_id] = {"id": user_id, "username": req.username, "password": req.password}
48    token = secrets.token_hex(16)
49    tokens[token] = user_id
50    return {"user_id": user_id, "token": token}
51 
52@app.post("/login")
53def login(req: LoginRequest):
54    for uid, u in users.items():
55        if u["username"] == req.username and u["password"] == req.password:
56            token = secrets.token_hex(16)
57            tokens[token] = uid
58            return {"token": token}
59    raise HTTPException(status_code=401, detail="Invalid credentials")
60 
61@app.get("/members/{member_id}")
62def get_member(member_id: int, authorization: str = Header(...)):
63    get_current_user(authorization)
64    if member_id not in members:
65        raise HTTPException(status_code=404, detail="Member not found")
66    return members[member_id]
67 
68@app.post("/members")
69def create_member(member: MemberCreate, authorization: str = Header(...)):
70    global next_member_id
71    get_current_user(authorization)
72    member_id = next_member_id
73    next_member_id += 1
74    members[member_id] = {
75        "id": member_id,
76        "name": member.name,
77        "emergency_contact": member.emergency_contact,
78        "membership_tier": member.membership_tier,
79        "created_at": datetime.datetime.utcnow().isoformat()
80    }
81    return members[member_id]
82 
83@app.patch("/members/{member_id}")
84def update_member(member_id: int, update: MemberUpdate, authorization: str = Header(...)):
85    get_current_user(authorization)
86    if member_id not in members:
87        raise HTTPException(status_code=404, detail="Member not found")
88    old = dict(members[member_id])
89    changes = {}
90    if update.name is not None:
91        members[member_id]["name"] = update.name
92        changes["name"] = {"old": old["name"], "new": update.name}
93    if update.emergency_contact is not None:
94        members[member_id]["emergency_contact"] = update.emergency_contact
95        changes["emergency_contact"] = {"old": old["emergency_contact"], "new": update.emergency_contact}
96    if update.membership_tier is not None:
97        members[member_id]["membership_tier"] = update.membership_tier
98        changes["membership_tier"] = {"old": old["membership_tier"], "new": update.membership_tier}
99    if changes:
100        member_change_log.append({
101            "member_id": member_id,
102            "timestamp": datetime.datetime.utcnow().isoformat(),
103            "changes": changes
104        })
105    return members[member_id]

1fastapi
2uvicorn