first commit

packages/frontend/src/api/client.ts

@@ -0,0 +1,89 @@
+export class ApiError extends Error {
+  readonly code: string;
+  readonly status: number;
+
+  constructor(status: number, code: string, message?: string) {
+    super(message ?? code);
+    this.name = 'ApiError';
+    this.status = status;
+    this.code = code;
+  }
+}
+
+async function parseJson<T>(res: Response): Promise<T> {
+  const body = (await res.json().catch(() => ({}))) as {
+    message?: string;
+    error?: string;
+  };
+  if (!res.ok) {
+    throw new ApiError(
+      res.status,
+      body.error ?? `http_${res.status}`,
+      body.message ?? body.error ?? `HTTP ${res.status}`,
+    );
+  }
+  return body as T;
+}
+
+export async function createSession(): Promise<{
+  sessionId: string;
+  reused?: boolean;
+}> {
+  return parseJson(
+    await fetch('/api/sessions', { method: 'POST', credentials: 'include' }),
+  );
+}
+
+export async function heartbeat(): Promise<void> {
+  await fetch('/api/sessions/heartbeat', {
+    method: 'POST',
+    credentials: 'include',
+  });
+}
+
+export async function endSession(): Promise<void> {
+  await fetch('/api/sessions', {
+    method: 'DELETE',
+    credentials: 'include',
+  });
+}
+
+export async function uploadDocument(file: File): Promise<{
+  docId: string;
+  filename: string;
+  fileType: string;
+  documentType: string;
+}> {
+  const form = new FormData();
+  form.append('file', file);
+  form.append('filename', file.name);
+  return parseJson(
+    await fetch('/api/documents', {
+      method: 'POST',
+      body: form,
+      credentials: 'include',
+    }),
+  );
+}
+
+export type EditorConfigResponse = {
+  documentType: string;
+  document: Record<string, unknown>;
+  editorConfig: Record<string, unknown>;
+  token: string;
+  documentServerUrl: string;
+};
+
+export async function fetchEditorConfig(
+  docId: string,
+): Promise<EditorConfigResponse> {
+  return parseJson(
+    await fetch(`/api/documents/${docId}/editor-config`, {
+      credentials: 'include',
+    }),
+  );
+}
+
+export function downloadDocumentUrl(docId: string): string {
+  return `/api/documents/${docId}/download`;
+}