Implement invite from command

src/domain/session/room/RoomViewModel.js

@@ -273,6 +273,14 @@ export class RoomViewModel extends ErrorReportViewModel {
                     this.reportError(new Error("join syntax: /join <room-id>"));
                 }
                 break;
+            case "invite":
+                if (args.length === 1) {
+                    const userId = args[0];
+                    await this._room.inviteUser(userId);
+                } else {
+                    this.reportError(new Error("invite syntax: /invite <user-id>"));
+                }
+                break;
             case "shrug":
                 message = "¯\\_(ツ)_/¯ " + args.join(" ");
                 msgtype = "m.text";

src/matrix/net/HomeServerApi.ts

@@ -267,6 +267,15 @@ export class HomeServerApi {
         return this._get("/pushers", undefined, undefined, options);
     }
 
+    invite(roomId: string, userId: string, reason?: string, options?: BaseRequestOptions): IHomeServerRequest {
+        return this._post(
+            `/rooms/${encodeURIComponent(roomId)}/invite`,
+            {},
+            { user_id: userId, reason },
+            options
+        );
+    }
+
     join(roomId: string, options?: BaseRequestOptions): IHomeServerRequest {
         return this._post(`/rooms/${encodeURIComponent(roomId)}/join`, {}, {}, options);
     }

src/matrix/room/Room.js

@@ -470,6 +470,13 @@ export class Room extends BaseRoom {
         });
     }
 
+    async inviteUser(userId, reason) {
+        if (!userId) {
+            throw new Error("userId is null/undefined");
+        }
+        await this._hsApi.invite(this.id, userId, reason).response();
+    }
+
     /* called by BaseRoom to pass pendingEvents when opening the timeline */
     _getPendingEvents() {
         return this._sendQueue.pendingEvents;