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1from fastapi import FastAPI, HTTPException, Header
2from pydantic import BaseModel
3from typing import Optional, Dict
4import secrets
5import uvicorn
6 
7app = FastAPI()
8 
9users = {}
10tokens = {}
11projects = {}
12project_id_counter = 1
13 
14class SignupRequest(BaseModel):
15    username: str
16    password: str
17 
18class LoginRequest(BaseModel):
19    username: str
20    password: str
21 
22class ProjectCreate(BaseModel):
23    description: str
24    technologies: list[str]
25    client_rating: float
26 
27class ProjectUpdate(BaseModel):
28    description: Optional[str] = None
29    technologies: Optional[list[str]] = None
30    client_rating: Optional[float] = None
31 
32def get_current_user(authorization: str = Header(None)):
33    if not authorization:
34        raise HTTPException(status_code=401, detail="Missing Authorization header")
35    token = authorization.replace("Bearer ", "")
36    if token not in tokens:
37        raise HTTPException(status_code=401, detail="Invalid token")
38    return tokens[token]
39 
40@app.post("/signup")
41def signup(req: SignupRequest):
42    if req.username in users:
43        raise HTTPException(status_code=400, detail="User already exists")
44    users[req.username] = req.password
45    return {"message": "User created"}
46 
47@app.post("/login")
48def login(req: LoginRequest):
49    if req.username not in users or users[req.username] != req.password:
50        raise HTTPException(status_code=401, detail="Invalid credentials")
51    token = secrets.token_hex(16)
52    tokens[token] = req.username
53    return {"token": token}
54 
55@app.get("/projects")
56def list_projects(authorization: str = Header(None)):
57    get_current_user(authorization)
58    return list(projects.values())
59 
60@app.get("/projects/{project_id}")
61def get_project(project_id: int, authorization: str = Header(None)):
62    get_current_user(authorization)
63    if project_id not in projects:
64        raise HTTPException(status_code=404, detail="Project not found")
65    return projects[project_id]
66 
67@app.post("/projects")
68def create_project(project: ProjectCreate, authorization: str = Header(None)):
69    get_current_user(authorization)
70    global project_id_counter
71    project_id = project_id_counter
72    project_id_counter += 1
73    projects[project_id] = {
74        "id": project_id,
75        "description": project.description,
76        "technologies": project.technologies,
77        "client_rating": project.client_rating
78    }
79    return projects[project_id]
80 
81@app.put("/projects/{project_id}")
82def update_project(project_id: int, project: ProjectUpdate, authorization: str = Header(None)):
83    get_current_user(authorization)
84    if project_id not in projects:
85        raise HTTPException(status_code=404, detail="Project not found")
86    existing = projects[project_id]
87    if project.description is not None:
88        existing["description"] = project.description
89    if project.technologies is not None:
90        existing["technologies"] = project.technologies
91    if project.client_rating is not None:
92        existing["client_rating"] = project.client_rating
93    return existing
94 
95@app.delete("/projects/{project_id}")
96def delete_project(project_id: int, authorization: str = Header(None)):
97    get_current_user(authorization)
98    if project_id not in projects:
99        raise HTTPException(status_code=404, detail="Project not found")
100    del projects[project_id]
101    return {"message": "Project deleted"}

1fastapi
2uvicorn