model: Add ZulipStream.canSendMessageGroup, new in FL 333

Author: chrisbobbe

lib/api/model/events.dart

@@ -680,6 +680,7 @@ class ChannelUpdateEvent extends ChannelEvent {
       case ChannelPropertyName.canAddSubscribersGroup:
       case ChannelPropertyName.canDeleteAnyMessageGroup:
       case ChannelPropertyName.canDeleteOwnMessageGroup:
+      case ChannelPropertyName.canSendMessageGroup:
       case ChannelPropertyName.canSubscribeGroup:
         return GroupSettingValue.fromJson(value);
       case ChannelPropertyName.streamWeeklyTraffic:

lib/api/model/events.g.dart

@@ -655,6 +655,7 @@ class ZulipStream {
   GroupSettingValue? canAddSubscribersGroup; // TODO(server-10)
   GroupSettingValue? canDeleteAnyMessageGroup; // TODO(server-11)
   GroupSettingValue? canDeleteOwnMessageGroup; // TODO(server-11)
+  GroupSettingValue? canSendMessageGroup; // TODO(server-10)
   GroupSettingValue? canSubscribeGroup; // TODO(server-10)
 
   // TODO(server-8): added in FL 199, was previously only on [Subscription] objects
@@ -676,6 +677,7 @@ class ZulipStream {
     required this.canAddSubscribersGroup,
     required this.canDeleteAnyMessageGroup,
     required this.canDeleteOwnMessageGroup,
+    required this.canSendMessageGroup,
     required this.canSubscribeGroup,
     required this.streamWeeklyTraffic,
   });
@@ -698,6 +700,7 @@ class ZulipStream {
       canAddSubscribersGroup: subscription.canAddSubscribersGroup,
       canDeleteAnyMessageGroup: subscription.canDeleteAnyMessageGroup,
       canDeleteOwnMessageGroup: subscription.canDeleteOwnMessageGroup,
+      canSendMessageGroup: subscription.canSendMessageGroup,
       canSubscribeGroup: subscription.canSubscribeGroup,
       streamWeeklyTraffic: subscription.streamWeeklyTraffic,
     );
@@ -733,6 +736,7 @@ enum ChannelPropertyName {
   canAddSubscribersGroup,
   canDeleteAnyMessageGroup,
   canDeleteOwnMessageGroup,
+  canSendMessageGroup,
   canSubscribeGroup,
   streamWeeklyTraffic;
 
@@ -817,6 +821,7 @@ class Subscription extends ZulipStream {
     required super.canAddSubscribersGroup,
     required super.canDeleteAnyMessageGroup,
     required super.canDeleteOwnMessageGroup,
+    required super.canSendMessageGroup,
     required super.canSubscribeGroup,
     required super.streamWeeklyTraffic,
     required this.desktopNotifications,

lib/api/model/model.dart

@@ -405,6 +405,8 @@ class ChannelStoreImpl extends HasUserStore with ChannelStore {
             stream.canDeleteAnyMessageGroup = event.value as GroupSettingValue;
           case ChannelPropertyName.canDeleteOwnMessageGroup:
             stream.canDeleteOwnMessageGroup = event.value as GroupSettingValue;
+          case ChannelPropertyName.canSendMessageGroup:
+            stream.canSendMessageGroup = event.value as GroupSettingValue;
           case ChannelPropertyName.canSubscribeGroup:
             stream.canSubscribeGroup = event.value as GroupSettingValue;
           case ChannelPropertyName.streamWeeklyTraffic:

lib/api/model/model.g.dart

@@ -461,9 +461,16 @@ ZulipStream stream({
   GroupSettingValue? canAddSubscribersGroup,
   GroupSettingValue? canDeleteAnyMessageGroup,
   GroupSettingValue? canDeleteOwnMessageGroup,
+  GroupSettingValue? canSendMessageGroup,
   GroupSettingValue? canSubscribeGroup,
   int? streamWeeklyTraffic,
 }) {
+  if (channelPostPolicy == null) {
+    // Set a default for realmCanDeleteOwnMessageGroup, but only if we're
+    // not trying to test legacy behavior with channelPostPolicy.
+    canSendMessageGroup ??= groupSetting(members: [selfUser.userId]);
+  }
+
   _checkPositive(streamId, 'stream ID');
   _checkPositive(firstMessageId, 'message ID');
   var effectiveStreamId = streamId ?? _nextStreamId();
@@ -485,6 +492,7 @@ ZulipStream stream({
     canAddSubscribersGroup: canAddSubscribersGroup ?? GroupSettingValueNamed(nobodyGroup.id),
     canDeleteAnyMessageGroup: canDeleteAnyMessageGroup ?? GroupSettingValueNamed(nobodyGroup.id),
     canDeleteOwnMessageGroup: canDeleteOwnMessageGroup ?? GroupSettingValueNamed(nobodyGroup.id),
+    canSendMessageGroup: canSendMessageGroup,
     canSubscribeGroup: canSubscribeGroup ?? GroupSettingValueNamed(nobodyGroup.id),
     streamWeeklyTraffic: streamWeeklyTraffic,
   );
@@ -528,6 +536,7 @@ Subscription subscription(
     canAddSubscribersGroup: stream.canAddSubscribersGroup,
     canDeleteAnyMessageGroup: stream.canDeleteAnyMessageGroup,
     canDeleteOwnMessageGroup: stream.canDeleteOwnMessageGroup,
+    canSendMessageGroup: stream.canSendMessageGroup,
     canSubscribeGroup: stream.canSubscribeGroup,
     streamWeeklyTraffic: stream.streamWeeklyTraffic,
     desktopNotifications: desktopNotifications ?? false,
@@ -1206,6 +1215,7 @@ ChannelUpdateEvent channelUpdateEvent(
     case ChannelPropertyName.canAddSubscribersGroup:
     case ChannelPropertyName.canDeleteAnyMessageGroup:
     case ChannelPropertyName.canDeleteOwnMessageGroup:
+    case ChannelPropertyName.canSendMessageGroup:
     case ChannelPropertyName.canSubscribeGroup:
       assert(value is GroupSettingValue);
     case ChannelPropertyName.streamWeeklyTraffic: