Squash Odysseus development history

static/js/providerDeviceFlow.js

@@ -0,0 +1,128 @@
+// Shared DOM-free provider device-flow runner.
+
+export const PROVIDER_DEVICE_FLOWS = {
+  copilot: {
+    label: 'GitHub Copilot',
+    startUrl: '/api/copilot/device/start',
+    pollUrl: '/api/copilot/device/poll',
+    authUrl(start) {
+      return start?.verification_uri_complete || start?.verification_uri || '';
+    },
+  },
+  'chatgpt-subscription': {
+    label: 'ChatGPT Subscription',
+    startUrl: '/api/chatgpt-subscription/device/start',
+    pollUrl: '/api/chatgpt-subscription/device/poll',
+    authUrl(start) {
+      return start?.verification_uri || '';
+    },
+  },
+};
+
+function _formData() {
+  if (typeof FormData !== 'undefined') return new FormData();
+  return new URLSearchParams();
+}
+
+async function _jsonOrEmpty(response) {
+  try {
+    return await response.json();
+  } catch (_) {
+    return {};
+  }
+}
+
+function _messageFromPayload(payload, fallback) {
+  if (payload && typeof payload.detail === 'string' && payload.detail.trim()) {
+    return payload.detail.trim();
+  }
+  if (payload && typeof payload.error === 'string' && payload.error.trim()) {
+    return payload.error.trim();
+  }
+  if (payload && typeof payload.message === 'string' && payload.message.trim()) {
+    return payload.message.trim();
+  }
+  return fallback;
+}
+
+export function formatDeviceFlowError(error, fallback = 'Request failed') {
+  if (!error) return fallback;
+  if (typeof error === 'string') return error;
+  if (error.detail) return String(error.detail);
+  if (error.message) return String(error.message);
+  return fallback;
+}
+
+async function _fetchJson(fetchImpl, url, options, fallback) {
+  const response = await fetchImpl(url, options);
+  const payload = await _jsonOrEmpty(response);
+  if (!response.ok) {
+    throw new Error(_messageFromPayload(payload, fallback || `Request failed (HTTP ${response.status})`));
+  }
+  return payload;
+}
+
+function _defaultSleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+async function _callCallback(fn, payload) {
+  if (typeof fn === 'function') await fn(payload);
+}
+
+export async function runProviderDeviceFlow(provider, options = {}) {
+  const cfg = PROVIDER_DEVICE_FLOWS[provider];
+  if (!cfg) throw new Error(`Unknown device-flow provider: ${provider}`);
+
+  const fetchImpl = options.fetchImpl || globalThis.fetch?.bind(globalThis);
+  if (!fetchImpl) throw new Error('Fetch API is unavailable');
+
+  const openWindow = options.openWindow || ((url) => {
+    if (globalThis.window && typeof globalThis.window.open === 'function') {
+      globalThis.window.open(url, '_blank', 'noopener');
+    }
+  });
+  const sleep = options.sleep || _defaultSleep;
+  const now = options.now || (() => Date.now());
+  const formData = options.formData || _formData();
+
+  const start = await _fetchJson(fetchImpl, cfg.startUrl, {
+    method: 'POST',
+    body: formData,
+    credentials: 'same-origin',
+  }, `Failed to start ${cfg.label} sign-in`);
+
+  if (!start.poll_id) throw new Error(`${cfg.label} sign-in did not return a poll id`);
+  const authUrl = cfg.authUrl(start);
+  await _callCallback(options.onStart, { provider, config: cfg, start, authUrl });
+  if (authUrl) openWindow(authUrl);
+
+  const deadline = now() + Number(start.expires_in || 900) * 1000;
+  let stepMs = Math.max(Number(start.interval || 5), 2) * 1000;
+
+  while (true) {
+    if (now() > deadline) return { status: 'expired' };
+    await _callCallback(options.onWaiting, { provider, config: cfg, start, authUrl });
+    await sleep(stepMs);
+    if (now() > deadline) return { status: 'expired' };
+
+    const fd = _formData();
+    fd.append('poll_id', start.poll_id);
+    const poll = await _fetchJson(fetchImpl, cfg.pollUrl, {
+      method: 'POST',
+      body: fd,
+      credentials: 'same-origin',
+    }, `${cfg.label} sign-in poll failed`);
+    await _callCallback(options.onPoll, { provider, config: cfg, start, poll });
+
+    if (poll.status === 'authorized') {
+      return { status: 'authorized', endpoint: poll.endpoint || {} };
+    }
+    if (poll.status === 'failed') {
+      return { status: 'failed', error: poll.error || 'denied' };
+    }
+    if (poll.interval) {
+      stepMs = Math.max(Number(poll.interval || 5), 2) * 1000;
+    }
+  }
+}