Initial LinkLog implementation

backend/app/api/auth.py

@@ -0,0 +1,61 @@
+from uuid import uuid4
+
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+
+from backend.app.database import get_connection, init_db
+from backend.app.services.auth_service import authenticate_user
+from backend.app.services.token_service import issue_token, revoke_token, validate_token
+
+router = APIRouter()
+
+init_db()
+
+
+class LoginRequest(BaseModel):
+    username: str
+    password: str
+
+
+@router.post('/login')
+def login(payload: LoginRequest):
+    user = authenticate_user(payload.username, payload.password)
+    if user is None:
+        raise HTTPException(status_code=401, detail='Invalid username or password')
+
+    token_data = issue_token(user['id'], user['username'])
+    return {
+        'access_token': token_data['access_token'],
+        'token_type': 'bearer',
+        'expires_at': token_data['expires_at'],
+        'refresh_token': token_data['refresh_token'],
+        'user': {'id': user['id'], 'username': user['username'], 'email': user['email']}
+    }
+
+
+@router.post('/logout')
+def logout(payload: dict):
+    token = payload.get('token')
+    if not token:
+        raise HTTPException(status_code=400, detail='Token is required')
+    revoked = revoke_token(token)
+    if not revoked:
+        raise HTTPException(status_code=404, detail='Token not found or already revoked')
+    return {'status': 'logged_out'}
+
+
+@router.get('/me')
+def current_user(token: str):
+    info = validate_token(token)
+    if info is None:
+        raise HTTPException(status_code=401, detail='Token expired or invalid')
+    with get_connection() as conn:
+        user = conn.execute('SELECT * FROM users WHERE id = ?', (info['user_id'],)).fetchone()
+    if user is None:
+        raise HTTPException(status_code=404, detail='User not found')
+    return {
+        'id': user['id'],
+        'username': user['username'],
+        'email': user['email'],
+        'is_admin': bool(user['is_admin']),
+    }