Add hosted login persistence

src/workspace.ts

@@ -65,6 +65,16 @@ export type WorkspaceSnapshot = {
   studySettings: StudySettings
 }
 
+export type HostedUser = {
+  id: number
+  username: string
+}
+
+export type HostedSession = {
+  authenticated: boolean
+  user: HostedUser | null
+}
+
 export function hostedWorkspaceEnabled() {
   return remoteWorkspaceEnabled
 }
@@ -223,3 +233,40 @@ async function saveRemoteWorkspaceSnapshot(snapshot: WorkspaceSnapshot) {
     throw new Error(`Unable to save hosted workspace: ${response.status} ${response.statusText}`)
   }
 }
+
+export async function loadHostedSession(): Promise<HostedSession> {
+  if (!remoteWorkspaceEnabled) return { authenticated: false, user: null }
+  const response = await fetch(`${remoteWorkspaceApiBase}/session`, {
+    credentials: 'include',
+  })
+  if (!response.ok) {
+    throw new Error(`Unable to check hosted login: ${response.status} ${response.statusText}`)
+  }
+  return response.json() as Promise<HostedSession>
+}
+
+export async function loginHostedWorkspace(username: string, password: string): Promise<HostedSession> {
+  const response = await fetch(`${remoteWorkspaceApiBase}/login`, {
+    method: 'POST',
+    credentials: 'include',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify({ username, password }),
+  })
+  if (!response.ok) {
+    throw new Error(response.status === 401 ? 'Invalid username or password.' : `Unable to log in: ${response.status} ${response.statusText}`)
+  }
+  return response.json() as Promise<HostedSession>
+}
+
+export async function logoutHostedWorkspace(): Promise<void> {
+  if (!remoteWorkspaceEnabled) return
+  const response = await fetch(`${remoteWorkspaceApiBase}/logout`, {
+    method: 'POST',
+    credentials: 'include',
+  })
+  if (!response.ok) {
+    throw new Error(`Unable to log out: ${response.status} ${response.statusText}`)
+  }
+}