initial commit

src/util/matrixUtil.js

@@ -0,0 +1,67 @@
+import initMatrix from '../client/initMatrix';
+
+const WELL_KNOWN_URI = '/.well-known/matrix/client';
+
+async function getBaseUrl(homeserver) {
+  const serverDiscoveryUrl = `https://${homeserver}${WELL_KNOWN_URI}`;
+  try {
+    const result = await fetch(serverDiscoveryUrl, { method: 'GET' });
+    const data = await result.json();
+
+    return data?.['m.homeserver']?.base_url;
+  } catch (e) {
+    throw new Error('Homeserver not found');
+  }
+}
+
+function getUsername(userId) {
+  const mx = initMatrix.matrixClient;
+  const user = mx.getUser(userId);
+  if (user === null) return userId;
+  let username = user.displayName;
+  if (typeof username === 'undefined') {
+    username = userId;
+  }
+  return username;
+}
+
+async function isRoomAliasAvailable(alias) {
+  try {
+    const myUserId = initMatrix.matrixClient.getUserId();
+    const myServer = myUserId.slice(myUserId.indexOf(':') + 1);
+    const result = await initMatrix.matrixClient.resolveRoomAlias(alias);
+    const aliasIsRegisteredOnMyServer = typeof result.servers.find((server) => server === myServer) === 'string';
+
+    if (aliasIsRegisteredOnMyServer) return false;
+    return true;
+  } catch (e) {
+    if (e.errcode === 'M_NOT_FOUND') return true;
+    if (e.errcode === 'M_INVALID_PARAM') throw new Error(e);
+    return false;
+  }
+}
+
+function doesRoomHaveUnread(room) {
+  const userId = initMatrix.matrixClient.getUserId();
+  const readUpToId = room.getEventReadUpTo(userId);
+
+  if (room.timeline.length
+    && room.timeline[room.timeline.length - 1].sender
+    && room.timeline[room.timeline.length - 1].sender.userId === userId
+    && room.timeline[room.timeline.length - 1].getType() !== 'm.room.member') {
+    return false;
+  }
+
+  for (let i = room.timeline.length - 1; i >= 0; i -= 1) {
+    const event = room.timeline[i];
+
+    if (event.getId() === readUpToId) return false;
+    return true;
+  }
+  return true;
+}
+
+export {
+  getBaseUrl, getUsername,
+  isRoomAliasAvailable, doesRoomHaveUnread,
+};