Important Fixes, New mechanics, and many more

apps/web/composables/useDngAuth.ts

@@ -0,0 +1,188 @@
+interface DngAuthUser {
+  id: string
+  email?: string | null
+  is_anonymous?: boolean
+  user_metadata?: Record<string, unknown>
+}
+
+interface DngSession {
+  accessToken: string
+  refreshToken: string
+  expiresAt: number
+  user: DngAuthUser
+}
+
+interface AuthResponse {
+  access_token: string
+  refresh_token: string
+  expires_in: number
+  user: DngAuthUser
+}
+
+const STORAGE_KEY = 'dng-auth-session'
+
+export function useDngAuth() {
+  const config = useRuntimeConfig()
+  const session = useState<DngSession | null>('dng-auth-session', () => null)
+  const hydrated = useState('dng-auth-hydrated', () => false)
+
+  function authHeaders(accessToken?: string) {
+    return {
+      apikey: config.public.supabaseAnonKey,
+      'Content-Type': 'application/json',
+      ...(accessToken ? { Authorization: `Bearer ${accessToken}` } : {}),
+    }
+  }
+
+  function persist(next: DngSession | null) {
+    session.value = next
+    if (!import.meta.client) return
+    if (next) localStorage.setItem(STORAGE_KEY, JSON.stringify(next))
+    else localStorage.removeItem(STORAGE_KEY)
+  }
+
+  function normalizeUser(user: DngAuthUser): DngAuthUser {
+    return {
+      ...user,
+      email: user.email || undefined,
+    }
+  }
+
+  function parseStoredSession(value: string): DngSession | null {
+    try {
+      const saved = JSON.parse(value) as Partial<DngSession>
+      if (
+        typeof saved.accessToken !== 'string' || !saved.accessToken
+        || typeof saved.refreshToken !== 'string' || !saved.refreshToken
+        || typeof saved.expiresAt !== 'number' || !Number.isFinite(saved.expiresAt)
+        || !saved.user || typeof saved.user.id !== 'string' || !saved.user.id
+      ) return null
+      return { ...saved, user: normalizeUser(saved.user) } as DngSession
+    } catch {
+      return null
+    }
+  }
+
+  async function fetchUser(accessToken: string) {
+    const user = await $fetch<DngAuthUser>(`${config.public.supabaseUrl}/auth/v1/user`, {
+      headers: authHeaders(accessToken),
+    })
+    return normalizeUser(user)
+  }
+
+  function fromResponse(response: AuthResponse): DngSession {
+    return {
+      accessToken: response.access_token,
+      refreshToken: response.refresh_token,
+      expiresAt: Date.now() + response.expires_in * 1000,
+      user: normalizeUser(response.user),
+    }
+  }
+
+  async function refresh() {
+    if (!session.value?.refreshToken) return null
+    try {
+      const response = await $fetch<AuthResponse>(`${config.public.supabaseUrl}/auth/v1/token?grant_type=refresh_token`, {
+        method: 'POST',
+        headers: authHeaders(),
+        body: { refresh_token: session.value.refreshToken },
+      })
+      const next = fromResponse(response)
+      persist(next)
+      return next
+    } catch {
+      persist(null)
+      return null
+    }
+  }
+
+  async function restore() {
+    if (!import.meta.client || hydrated.value) return session.value
+
+    let restoredFromStorage = false
+    const hash = new URLSearchParams(window.location.hash.replace(/^#/, ''))
+    const hashAccessToken = hash.get('access_token')
+    const hashRefreshToken = hash.get('refresh_token')
+    if (hashAccessToken && hashRefreshToken) {
+      const expiresIn = Number(hash.get('expires_in') ?? 3600)
+      const user = await fetchUser(hashAccessToken)
+      persist({ accessToken: hashAccessToken, refreshToken: hashRefreshToken, expiresAt: Date.now() + expiresIn * 1000, user })
+      history.replaceState(null, '', `${window.location.pathname}${window.location.search}`)
+    } else {
+      const saved = localStorage.getItem(STORAGE_KEY)
+      if (saved) {
+        const parsed = parseStoredSession(saved)
+        if (parsed) {
+          session.value = parsed
+          restoredFromStorage = true
+        } else {
+          persist(null)
+        }
+      }
+    }
+
+    if (session.value && session.value.expiresAt <= Date.now() + 60_000) {
+      await refresh()
+    } else if (session.value && restoredFromStorage) {
+      try {
+        const user = await fetchUser(session.value.accessToken)
+        persist({ ...session.value, user })
+      } catch {
+        // A saved token may belong to an old Supabase project or have been
+        // revoked before its local expiry. Refresh once, then discard it.
+        await refresh()
+      }
+    }
+    hydrated.value = true
+    return session.value
+  }
+
+  async function requestMagicLink(email: string) {
+    const redirectTo = `${window.location.origin}/auth/callback`
+    await $fetch(`${config.public.supabaseUrl}/auth/v1/otp?redirect_to=${encodeURIComponent(redirectTo)}`, {
+      method: 'POST',
+      headers: authHeaders(),
+      body: { email: email.trim().toLowerCase(), create_user: true },
+    })
+  }
+
+  async function signInAnonymously() {
+    const response = await $fetch<AuthResponse>(`${config.public.supabaseUrl}/auth/v1/signup`, {
+      method: 'POST',
+      headers: authHeaders(),
+      body: {
+        data: { display_name: 'Guest Adventurer' },
+        gotrue_meta_security: {},
+      },
+    })
+    const next = fromResponse(response)
+    persist(next)
+    hydrated.value = true
+    return next
+  }
+
+  async function accessToken() {
+    await restore()
+    if (!session.value) throw new Error('Enter the alpha to continue.')
+    if (session.value.expiresAt <= Date.now() + 60_000) await refresh()
+    if (!session.value) throw new Error('Your session expired. Sign in again.')
+    return session.value.accessToken
+  }
+
+  async function signOut() {
+    const token = session.value?.accessToken
+    persist(null)
+    if (!token) return
+    await $fetch(`${config.public.supabaseUrl}/auth/v1/logout`, {
+      method: 'POST',
+      headers: authHeaders(token),
+    }).catch(() => undefined)
+  }
+
+  function invalidate() {
+    persist(null)
+    hydrated.value = true
+  }
+
+  return { session, hydrated, restore, refresh, requestMagicLink, signInAnonymously, accessToken, signOut, invalidate }
+}