metadata: allow disabling channel memebr sync

Signed-off-by: Sumner Evans <sumner.evans@automattic.com>

pkg/connector/chatinfo.go

@@ -50,9 +50,9 @@ func (t *TelegramClient) getDMChatInfo(ctx context.Context, userID int64) (*brid
 	return &chatInfo, nil
 }
 
-func (t *TelegramClient) getGroupChatInfo(ctx context.Context, fullChat *tg.MessagesChatFull, chatID int64) (*bridgev2.ChatInfo, error) {
+func (t *TelegramClient) getGroupChatInfo(ctx context.Context, fullChat *tg.MessagesChatFull, chatID int64) (*bridgev2.ChatInfo, bool, error) {
 	if err := t.updateUsersFromResponse(ctx, fullChat); err != nil {
-		return nil, err
+		return nil, false, err
 	}
 
 	chatInfo := bridgev2.ChatInfo{
@@ -70,6 +70,7 @@ func (t *TelegramClient) getGroupChatInfo(ctx context.Context, fullChat *tg.Mess
 			},
 		},
 	}
+	var isBroadcastChannel bool
 	for _, c := range fullChat.GetChats() {
 		if c.GetID() == chatID {
 			switch chat := c.(type) {
@@ -77,6 +78,7 @@ func (t *TelegramClient) getGroupChatInfo(ctx context.Context, fullChat *tg.Mess
 				chatInfo.Name = &chat.Title
 			case *tg.Channel:
 				chatInfo.Name = &chat.Title
+				isBroadcastChannel = chat.Broadcast
 			}
 			break
 		}
@@ -93,7 +95,7 @@ func (t *TelegramClient) getGroupChatInfo(ctx context.Context, fullChat *tg.Mess
 		chatInfo.Topic = &about
 	}
 
-	return &chatInfo, nil
+	return &chatInfo, isBroadcastChannel, nil
 }
 
 func (t *TelegramClient) avatarFromPhoto(photo tg.PhotoClass) *bridgev2.Avatar {
@@ -146,7 +148,7 @@ func (t *TelegramClient) GetChatInfo(ctx context.Context, portal *bridgev2.Porta
 		if err != nil {
 			return nil, err
 		}
-		chatInfo, err := t.getGroupChatInfo(ctx, fullChat, id)
+		chatInfo, _, err := t.getGroupChatInfo(ctx, fullChat, id)
 		if err != nil {
 			return nil, err
 		}
@@ -199,7 +201,7 @@ func (t *TelegramClient) GetChatInfo(ctx context.Context, portal *bridgev2.Porta
 			return nil, err
 		}
 
-		chatInfo, err := t.getGroupChatInfo(ctx, fullChat, id)
+		chatInfo, isBroadcastChannel, err := t.getGroupChatInfo(ctx, fullChat, id)
 		if err != nil {
 			return nil, err
 		}
@@ -223,9 +225,15 @@ func (t *TelegramClient) GetChatInfo(ctx context.Context, portal *bridgev2.Porta
 		chatInfo.Members.IsFull = false
 
 		// Just return the current user as a member if we can't view the
-		// participants or the max initial sync is 0 or if channel member sync
-		// is disabled.
-		if t.main.Config.MemberList.MaxInitialSync == 0 || !t.main.Config.MemberList.SyncChannels || !channelFull.CanViewParticipants || channelFull.ParticipantsHidden {
+		// participants or the max initial sync is 0.
+		if t.main.Config.MemberList.MaxInitialSync == 0 || !channelFull.CanViewParticipants || channelFull.ParticipantsHidden {
+			return chatInfo, nil
+		}
+
+		// If this is a broadcast channel and we're not syncing broadcast
+		// channels, just return the chat info without all of the participant
+		// info.
+		if isBroadcastChannel && !t.main.Config.MemberList.SyncBroadcastChannels {
 			return chatInfo, nil
 		}
 

pkg/connector/config.go

@@ -15,9 +15,9 @@ import (
 var _ bridgev2.ConfigValidatingNetwork = (*TelegramConnector)(nil)
 
 type MemberListConfig struct {
-	MaxInitialSync int  `yaml:"max_initial_sync"`
-	SyncChannels   bool `yaml:"sync_channels"`
-	SkipDeleted    bool `yaml:"skip_deleted"`
+	MaxInitialSync        int  `yaml:"max_initial_sync"`
+	SyncBroadcastChannels bool `yaml:"sync_broadcast_channels"`
+	SkipDeleted           bool `yaml:"skip_deleted"`
 }
 
 func (c MemberListConfig) NormalizedMaxInitialSync() int {
@@ -54,7 +54,7 @@ func upgradeConfig(helper up.Helper) {
 	helper.Copy(up.Int, "animated_sticker", "args", "height")
 	helper.Copy(up.Int, "animated_sticker", "args", "fps")
 	helper.Copy(up.Int, "member_list", "max_initial_sync")
-	helper.Copy(up.Bool, "member_list", "sync_channels")
+	helper.Copy(up.Bool, "member_list", "sync_broadcast_channels")
 	helper.Copy(up.Bool, "member_list", "skip_deleted")
 	helper.Copy(up.Int, "max_member_count")
 }

pkg/connector/example-config.yaml

@@ -31,12 +31,12 @@ member_list:
     # -1 means no limit (which means it's limited to 10000 by the server)
     max_initial_sync: 100
 
-    # Whether or not to sync the member list in channels. If disabled, members
-    # will still be synced when they send messages.
+    # Whether or not to sync the member list in broadcast channels. If
+    # disabled, members will still be synced when they send messages.
     #
     # If no channel admins have logged into the bridge, the bridge won't be
     # able to sync the member list regardless of this setting.
-    sync_channels: false
+    sync_broadcast_channels: false
 
     # Whether or not to skip deleted members when syncing members.
     skip_deleted: true