Yue Fung Lee
37 lines
695 B
TypeScript
37 lines
695 B
TypeScript
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// db.users: Signup table map<username, password>
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// db.user: Current logged-in user
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const db = localStorage
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export function signup(username: string, password: string)
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{
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if (!db.users)
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db.users = JSON.stringify({})
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const users = JSON.parse(db.users)
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if (users[username])
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throw new Error('User already exists')
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users[username] = password
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db.users = JSON.stringify(users)
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}
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export function login(username: string, password: string)
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{
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const users = JSON.parse(db.users)
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if (users[username] !== password)
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throw new Error('Invalid credentials')
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db.user = username
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}
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export function logout()
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{
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delete db.user
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}
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export function isLoggedIn()
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{
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return !!db.user
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}
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