[Client] List public rooms

lib/src/client.dart

@@ -33,6 +33,7 @@ import 'package:famedlysdk/src/sync/user_update.dart';
 import 'package:famedlysdk/src/utils/device_keys_list.dart';
 import 'package:famedlysdk/src/utils/matrix_file.dart';
 import 'package:famedlysdk/src/utils/open_id_credentials.dart';
+import 'package:famedlysdk/src/utils/public_rooms_response.dart';
 import 'package:famedlysdk/src/utils/room_key_request.dart';
 import 'package:famedlysdk/src/utils/session_key.dart';
 import 'package:famedlysdk/src/utils/to_device_event.dart';
@@ -428,9 +429,12 @@ class Client {
     return archiveList;
   }
 
-  Future<dynamic> joinRoomById(String id) async {
+  /// This API starts a user participating in a particular room, if that user is allowed to participate in that room.
-    return await this
+  /// After this call, the client is allowed to see all current state events in the room, and all subsequent events
-        .jsonRequest(type: HTTPType.POST, action: "/client/r0/join/$id");
+  /// associated with the room until the user leaves the room.
+  Future<dynamic> joinRoomById(String roomIdOrAlias) async {
+    return await this.jsonRequest(
+        type: HTTPType.POST, action: "/client/r0/join/$roomIdOrAlias");
   }
 
   /// Loads the contact list for this user excluding the user itself.
@@ -1870,4 +1874,34 @@ class Client {
     );
     return;
   }
+
+  /// Lists the public rooms on the server, with optional filter.
+  Future<PublicRoomsResponse> requestPublicRooms({
+    int limit,
+    String since,
+    String genericSearchTerm,
+    String server,
+    bool includeAllNetworks,
+    String thirdPartyInstanceId,
+  }) async {
+    String action = "/client/r0/publicRooms";
+    if (server != null) {
+      action += "?server=$server";
+    }
+    final Map<String, dynamic> response = await jsonRequest(
+      type: HTTPType.POST,
+      action: action,
+      data: {
+        if (limit != null) "limit": 10,
+        if (since != null) "since": since,
+        if (genericSearchTerm != null)
+          "filter": {"generic_search_term": genericSearchTerm},
+        if (includeAllNetworks != null)
+          "include_all_networks": includeAllNetworks,
+        if (thirdPartyInstanceId != null)
+          "third_party_instance_id": thirdPartyInstanceId,
+      },
+    );
+    return PublicRoomsResponse.fromJson(response, this);
+  }
 }

lib/src/utils/public_rooms_response.dart

@@ -0,0 +1,67 @@
+import '../client.dart';
+
+class PublicRoomsResponse {
+  List<PublicRoomEntry> publicRooms;
+  final String nextBatch;
+  final String prevBatch;
+  final int totalRoomCountEstimate;
+  Client client;
+
+  PublicRoomsResponse({
+    this.publicRooms,
+    this.nextBatch,
+    this.prevBatch,
+    this.totalRoomCountEstimate,
+    this.client,
+  });
+
+  PublicRoomsResponse.fromJson(Map<String, dynamic> json, Client client)
+      : nextBatch = json['next_batch'],
+        prevBatch = json['prev_batch'],
+        client = client,
+        totalRoomCountEstimate = json['total_room_count_estimate'] {
+    if (json['chunk'] != null) {
+      publicRooms = List<PublicRoomEntry>();
+      json['chunk'].forEach((v) {
+        publicRooms.add(PublicRoomEntry.fromJson(v, client));
+      });
+    }
+  }
+}
+
+class PublicRoomEntry {
+  final List<String> aliases;
+  final String avatarUrl;
+  final bool guestCanJoin;
+  final String name;
+  final int numJoinedMembers;
+  final String roomId;
+  final String topic;
+  final bool worldReadable;
+  Client client;
+
+  Future<void> join(Client client) => client.joinRoomById(roomId);
+
+  PublicRoomEntry({
+    this.aliases,
+    this.avatarUrl,
+    this.guestCanJoin,
+    this.name,
+    this.numJoinedMembers,
+    this.roomId,
+    this.topic,
+    this.worldReadable,
+    this.client,
+  });
+
+  PublicRoomEntry.fromJson(Map<String, dynamic> json, Client client)
+      : aliases = json['aliases'].cast<String>(),
+        avatarUrl = json['avatar_url'],
+        guestCanJoin = json['guest_can_join'],
+        name = json['name'],
+        numJoinedMembers = json['num_joined_members'],
+        roomId = json['room_id'],
+        topic = json['topic'],
+        worldReadable = json['world_readable'],
+        client = client;
+}