feat: create atproto oauth login

src/hooks/useATProtoLogin.hook.ts

@@ -0,0 +1,59 @@
+import { computed, ref } from 'vue'
+
+import { getAuthor } from '@/modules/atproto/getAuthor'
+import { restoreSession, sdkSignOut, signInWithHandle } from '@/modules/atproto/service/atprotoOAuth'
+import { clearSession, loadSession, saveSession } from '@/modules/atproto/service/atprotoSession'
+
+const did = ref<string | null>(null)
+const handle = ref<string | null>(null)
+
+let init = true
+
+const initializeAuth = async () => {
+  const session = await restoreSession()
+
+  if (session) {
+    const author = await getAuthor(session.did)
+    const resolvedHandle = author?.handle ?? ''
+
+    did.value = session.did
+    handle.value = resolvedHandle
+    await saveSession(session.did, resolvedHandle)
+  } else {
+    const stored = await loadSession()
+    did.value = stored?.did ?? ''
+    handle.value = stored?.handle ?? ''
+  }
+}
+
+export const useATProtoLogin = () => {
+  if (init) {
+    init = false
+    initializeAuth()
+  }
+
+  const isLoggedIn = computed(() => !!did.value)
+  const isATProtoReady = computed(() => did.value !== null)
+
+  const signIn = async (inputHandle: string): Promise<void> => {
+    await signInWithHandle(inputHandle)
+  }
+
+  const signOut = async (): Promise<void> => {
+    if (did.value) {
+      await sdkSignOut(did.value)
+    }
+    await clearSession()
+    did.value = ''
+    handle.value = ''
+  }
+
+  return {
+    did,
+    handle,
+    isLoggedIn,
+    isATProtoReady,
+    signIn,
+    signOut,
+  }
+}