action_sheet: Check can_subscribe_group for "Subscribe" confirmation dialog

chrisbobbe · chrisbobbe · commit b628dd9a1ed9 · 2025-09-30T17:47:12.000-07:00
Fixes #1786.
diff --git a/assets/l10n/app_en.arb b/assets/l10n/app_en.arb
@@ -143,9 +143,9 @@
       "channelName": {"type": "String", "example": "mobile"}
     }
   },
-  "unsubscribeConfirmationDialogMessageMaybeCannotResubscribe": "Once you leave this channel, you might not be able to rejoin.",
-  "@unsubscribeConfirmationDialogMessageMaybeCannotResubscribe": {
-    "description": "Message for a confirmation dialog for unsubscribing from a channel when you might not have permission to resubscribe."
+  "unsubscribeConfirmationDialogMessageCannotResubscribe": "Once you leave this channel, you will not be able to rejoin.",
+  "@unsubscribeConfirmationDialogMessageCannotResubscribe": {
+    "description": "Message for a confirmation dialog for unsubscribing from a channel when you will not have permission to resubscribe."
   },
   "unsubscribeConfirmationDialogConfirmButton": "Unsubscribe",
   "@unsubscribeConfirmationDialogConfirmButton": {
diff --git a/lib/generated/l10n/zulip_localizations.dart b/lib/generated/l10n/zulip_localizations.dart
@@ -341,11 +341,11 @@ abstract class ZulipLocalizations {
   /// **'Unsubscribe from {channelName}?'**
   String unsubscribeConfirmationDialogTitle(String channelName);
 
-  /// Message for a confirmation dialog for unsubscribing from a channel when you might not have permission to resubscribe.
+  /// Message for a confirmation dialog for unsubscribing from a channel when you will not have permission to resubscribe.
   ///
   /// In en, this message translates to:
-  /// **'Once you leave this channel, you might not be able to rejoin.'**
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe;
+  /// **'Once you leave this channel, you will not be able to rejoin.'**
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe;
 
   /// Label for the 'Unsubscribe' button on a confirmation dialog for unsubscribing from a channel.
   ///
diff --git a/lib/generated/l10n/zulip_localizations_ar.dart b/lib/generated/l10n/zulip_localizations_ar.dart
@@ -124,8 +124,8 @@ class ZulipLocalizationsAr extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Once you leave this channel, you might not be able to rejoin.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';
diff --git a/lib/generated/l10n/zulip_localizations_de.dart b/lib/generated/l10n/zulip_localizations_de.dart
@@ -126,8 +126,8 @@ class ZulipLocalizationsDe extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Wenn du diesen Kanal verlässt, kannst du sich vielleicht nicht wieder beitreten.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Deabonnieren';
diff --git a/lib/generated/l10n/zulip_localizations_en.dart b/lib/generated/l10n/zulip_localizations_en.dart
@@ -124,8 +124,8 @@ class ZulipLocalizationsEn extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Once you leave this channel, you might not be able to rejoin.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';
diff --git a/lib/generated/l10n/zulip_localizations_fr.dart b/lib/generated/l10n/zulip_localizations_fr.dart
@@ -126,8 +126,8 @@ class ZulipLocalizationsFr extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Once you leave this channel, you might not be able to rejoin.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Se désinscrire';
diff --git a/lib/generated/l10n/zulip_localizations_it.dart b/lib/generated/l10n/zulip_localizations_it.dart
@@ -125,8 +125,8 @@ class ZulipLocalizationsIt extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Once you leave this channel, you might not be able to rejoin.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';
diff --git a/lib/generated/l10n/zulip_localizations_ja.dart b/lib/generated/l10n/zulip_localizations_ja.dart
@@ -123,8 +123,8 @@ class ZulipLocalizationsJa extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'このチャンネルを退出すると、再び参加できない可能性があります。';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'チャンネルから退出';
diff --git a/lib/generated/l10n/zulip_localizations_nb.dart b/lib/generated/l10n/zulip_localizations_nb.dart
@@ -124,8 +124,8 @@ class ZulipLocalizationsNb extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Once you leave this channel, you might not be able to rejoin.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';
diff --git a/lib/generated/l10n/zulip_localizations_pl.dart b/lib/generated/l10n/zulip_localizations_pl.dart
@@ -126,8 +126,8 @@ class ZulipLocalizationsPl extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Po opuszczeniu kanału możesz utracić możliwość powrotu.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Odsubskrybuj';
diff --git a/lib/generated/l10n/zulip_localizations_ru.dart b/lib/generated/l10n/zulip_localizations_ru.dart
@@ -126,8 +126,8 @@ class ZulipLocalizationsRu extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Покинув этот канал, возможно, вы не сможете присоединиться вновь.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Отписаться';
diff --git a/lib/generated/l10n/zulip_localizations_sk.dart b/lib/generated/l10n/zulip_localizations_sk.dart
@@ -124,8 +124,8 @@ class ZulipLocalizationsSk extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Once you leave this channel, you might not be able to rejoin.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';
diff --git a/lib/generated/l10n/zulip_localizations_sl.dart b/lib/generated/l10n/zulip_localizations_sl.dart
@@ -124,8 +124,8 @@ class ZulipLocalizationsSl extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Ko zapustite ta kanal, se morda ne boste mogli znova pridružiti.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Prekliči naročnino';
diff --git a/lib/generated/l10n/zulip_localizations_uk.dart b/lib/generated/l10n/zulip_localizations_uk.dart
@@ -127,8 +127,8 @@ class ZulipLocalizationsUk extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Після того, як ви залишите цей канал, ви, можливо, не зможете приєднатися знову.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Скасувати підписку';
diff --git a/lib/generated/l10n/zulip_localizations_zh.dart b/lib/generated/l10n/zulip_localizations_zh.dart
@@ -124,8 +124,8 @@ class ZulipLocalizationsZh extends ZulipLocalizations {
   }
 
   @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      'Once you leave this channel, you might not be able to rejoin.';
+  String get unsubscribeConfirmationDialogMessageCannotResubscribe =>
+      'Once you leave this channel, you will not be able to rejoin.';
 
   @override
   String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';
@@ -1254,10 +1254,6 @@ class ZulipLocalizationsZhHansCn extends ZulipLocalizationsZh {
     return '确定取消订阅$channelName么?';
   }
 
-  @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      '一旦退出该频道，您可能无法重新加入。';
-
   @override
   String get unsubscribeConfirmationDialogConfirmButton => '取消订阅';
 
@@ -2342,10 +2338,6 @@ class ZulipLocalizationsZhHantTw extends ZulipLocalizationsZh {
     return '確定要取消訂閱 $channelName 嗎？';
   }
 
-  @override
-  String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>
-      '一旦您離開此頻道，可能無法重新加入。';
-
   @override
   String get unsubscribeConfirmationDialogConfirmButton => '取消訂閱';
 
diff --git a/lib/widgets/action_sheet.dart b/lib/widgets/action_sheet.dart
@@ -17,6 +17,7 @@ import '../model/content.dart';
 import '../model/emoji.dart';
 import '../model/internal_link.dart';
 import '../model/narrow.dart';
+import '../model/realm.dart';
 import 'actions.dart';
 import 'button.dart';
 import 'color.dart';
@@ -633,20 +634,21 @@ class UnsubscribeButton extends ActionSheetMenuItemButton {
 
   @override
   void onPressed() async {
-    final subscription = PerAccountStoreWidget.of(pageContext).subscriptions[channelId];
+    final store = PerAccountStoreWidget.of(pageContext);
+    final subscription = store.subscriptions[channelId];
     if (subscription == null) return; // TODO could give feedback
 
-    // TODO(#1786) check group-based permission to subscribe, then replace
-    //   error message with a new one saying "will not" instead of "might not"
     // TODO(future) check if the self-user is a guest and the channel is not web-public
-    final couldResubscribe = !subscription.inviteOnly;
+    final couldResubscribe = !subscription.inviteOnly
+      || store.selfHasPermissionForGroupSetting(subscription.canSubscribeGroup,
+           GroupSettingType.stream, 'can_subscribe_group');
     if (!couldResubscribe) {
       // TODO(#1788) warn if org would lose content access (nobody can subscribe)
       final zulipLocalizations = ZulipLocalizations.of(pageContext);
 
       final dialog = showSuggestedActionDialog(context: pageContext,
         title: zulipLocalizations.unsubscribeConfirmationDialogTitle(subscription.name),
-        message: zulipLocalizations.unsubscribeConfirmationDialogMessageMaybeCannotResubscribe,
+        message: zulipLocalizations.unsubscribeConfirmationDialogMessageCannotResubscribe,
         destructiveActionButton: true,
         actionButtonText: zulipLocalizations.unsubscribeConfirmationDialogConfirmButton);
       if (await dialog.result != true) return;
diff --git a/test/widgets/action_sheet_test.dart b/test/widgets/action_sheet_test.dart
@@ -600,7 +600,7 @@ void main() {
 
         final (unsubscribeButton, cancelButton) = checkSuggestedActionDialog(tester,
           expectedTitle: 'Unsubscribe from ${channel.name}?',
-          expectedMessage: 'Once you leave this channel, you might not be able to rejoin.',
+          expectedMessage: 'Once you leave this channel, you will not be able to rejoin.',
           expectDestructiveActionButton: true,
           expectedActionButtonText: 'Unsubscribe');
         await tester.tap(find.byWidget(unsubscribeButton));

Original file line number	Diff line number	Diff line change
`@@ -124,8 +124,8 @@ class ZulipLocalizationsAr extends ZulipLocalizations {`
`124`	`124`	`}`
`125`	`125`
`126`	`126`	`@override`
`127`		`- String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>`
`128`		`- 'Once you leave this channel, you might not be able to rejoin.';`
	`127`	`+ String get unsubscribeConfirmationDialogMessageCannotResubscribe =>`
	`128`	`+ 'Once you leave this channel, you will not be able to rejoin.';`
`129`	`129`
`130`	`130`	`@override`
`131`	`131`	`String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';`
Original file line number	Diff line number	Diff line change
`@@ -126,8 +126,8 @@ class ZulipLocalizationsDe extends ZulipLocalizations {`
`126`	`126`	`}`
`127`	`127`
`128`	`128`	`@override`
`129`		`- String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>`
`130`		`- 'Wenn du diesen Kanal verlässt, kannst du sich vielleicht nicht wieder beitreten.';`
	`129`	`+ String get unsubscribeConfirmationDialogMessageCannotResubscribe =>`
	`130`	`+ 'Once you leave this channel, you will not be able to rejoin.';`
`131`	`131`
`132`	`132`	`@override`
`133`	`133`	`String get unsubscribeConfirmationDialogConfirmButton => 'Deabonnieren';`
Original file line number	Diff line number	Diff line change
`@@ -125,8 +125,8 @@ class ZulipLocalizationsIt extends ZulipLocalizations {`
`125`	`125`	`}`
`126`	`126`
`127`	`127`	`@override`
`128`		`- String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>`
`129`		`- 'Once you leave this channel, you might not be able to rejoin.';`
	`128`	`+ String get unsubscribeConfirmationDialogMessageCannotResubscribe =>`
	`129`	`+ 'Once you leave this channel, you will not be able to rejoin.';`
`130`	`130`
`131`	`131`	`@override`
`132`	`132`	`String get unsubscribeConfirmationDialogConfirmButton => 'Unsubscribe';`
Original file line number	Diff line number	Diff line change
`@@ -123,8 +123,8 @@ class ZulipLocalizationsJa extends ZulipLocalizations {`
`123`	`123`	`}`
`124`	`124`
`125`	`125`	`@override`
`126`		`- String get unsubscribeConfirmationDialogMessageMaybeCannotResubscribe =>`
`127`		`- 'このチャンネルを退出すると、再び参加できない可能性があります。';`
	`126`	`+ String get unsubscribeConfirmationDialogMessageCannotResubscribe =>`
	`127`	`+ 'Once you leave this channel, you will not be able to rejoin.';`
`128`	`128`
`129`	`129`	`@override`
`130`	`130`	`String get unsubscribeConfirmationDialogConfirmButton => 'チャンネルから退出';`