implement headless sync plugin

server/plugins/headless-sync/plugin/src/auth.js

@@ -0,0 +1,69 @@
+const api = require("./api");
+
+function getObsidianSyncToken() {
+  for (let i = 0; i < localStorage.length; i++) {
+    const key = localStorage.key(i);
+
+    try {
+      const val = JSON.parse(localStorage.getItem(key));
+
+      if (val?.token && val?.email && val?.name) {
+        return val;
+      }
+    } catch {}
+  }
+
+  return null;
+}
+
+function triggerLogin(app) {
+  const aboutTab = app.setting.settingTabs.find((t) => t.id === "about");
+
+  if (!aboutTab || !aboutTab.accountSetting) {
+    return false;
+  }
+
+  const loginBtn = aboutTab.accountSetting.controlEl.querySelector("button");
+
+  if (!loginBtn) {
+    return false;
+  }
+
+  loginBtn.click();
+  return true;
+}
+
+async function sendTokenToServer(tokenData) {
+  return api.login(tokenData.token, tokenData.email, tokenData.name);
+}
+
+function waitForLogin(callback, timeoutMs = 60000) {
+  const interval = 2000;
+  let elapsed = 0;
+
+  const timer = setInterval(() => {
+    elapsed += interval;
+
+    const token = getObsidianSyncToken();
+
+    if (token) {
+      clearInterval(timer);
+      callback(token);
+      return;
+    }
+
+    if (elapsed >= timeoutMs) {
+      clearInterval(timer);
+      callback(null);
+    }
+  }, interval);
+
+  return () => clearInterval(timer);
+}
+
+module.exports = {
+  getObsidianSyncToken,
+  triggerLogin,
+  sendTokenToServer,
+  waitForLogin,
+};