feat: matrix

src/lib/chat/matrix-rx/client.ts

@@ -0,0 +1,71 @@
+import type { Direction, MatrixClient, Room } from "matrix-js-sdk";
+import {
+  filter,
+  map,
+  type Observable,
+  of,
+  distinctUntilChanged,
+  merge,
+} from "rxjs";
+import { fromMatrixClientEvent } from "./events";
+
+function roomListDistinct(prev: Room[], curr: Room[]) {
+  if (prev.length !== curr.length) return false;
+  for (let i = 0; i < prev.length; i++) {
+    if (prev[i]!.roomId !== curr[i]!.roomId) return false;
+  }
+  return true;
+}
+
+export class MatrixRx {
+  topLevelRooms$: Observable<Room[]>;
+
+  topLevelSpaces$: Observable<Room[]>;
+
+  topLevelChats$: Observable<Room[]>;
+
+  constructor(private client: MatrixClient) {
+    this.topLevelRooms$ = merge(
+      of([]),
+      fromMatrixClientEvent(client, "Room"),
+      fromMatrixClientEvent(client, "deleteRoom"),
+      fromMatrixClientEvent(client, "Room.myMembership"),
+      fromMatrixClientEvent(client, "Room.CurrentStateUpdated").pipe(
+        filter(
+          ([_room, prev, curr]) =>
+            prev.getStateEvents("m.space.parent").length !==
+            curr.getStateEvents("m.space.parent").length,
+        ),
+      ),
+    ).pipe(
+      map(() =>
+        this.client.getVisibleRooms().filter(
+          (room) =>
+            room.getMyMembership() !== "leave" &&
+            room
+              .getLiveTimeline()
+              .getState("f" as Direction.Forward)
+              ?.getStateEvents("m.space.parent").length === 0,
+        ),
+      ),
+      distinctUntilChanged(roomListDistinct),
+    );
+
+    this.topLevelSpaces$ = this.topLevelRooms$.pipe(
+      map((rooms) => rooms.filter((room) => room.isSpaceRoom())),
+      distinctUntilChanged(roomListDistinct),
+    );
+
+    this.topLevelChats$ = this.topLevelRooms$.pipe(
+      map((rooms) => rooms.filter((room) => !room.isSpaceRoom())),
+      distinctUntilChanged(roomListDistinct),
+    );
+  }
+}
+
+export class SpaceRx {
+  constructor(
+    private client: MatrixClient,
+    private space: Room,
+  ) {}
+}