inbox: Add label for archived channels in headers

Fixes #800

Author: chimnayajith

assets/l10n/app_en.arb

@@ -364,6 +364,10 @@
   "@unknownChannelName": {
     "description": "Replacement name for channel when it cannot be found in the store."
   },
+  "channelArchivedLabel": "(archived)",
+  "@channelArchivedLabel": {
+    "description": "Label shown next to an archived channel's name in headers."
+  },
   "composeBoxTopicHintText": "Topic",
   "@composeBoxTopicHintText":  {
     "description": "Hint text for topic input widget in compose box."

lib/generated/l10n/zulip_localizations.dart

@@ -585,6 +585,12 @@ abstract class ZulipLocalizations {
   /// **'(unknown channel)'**
   String get unknownChannelName;
 
+  /// Label shown next to an archived channel's name in headers.
+  ///
+  /// In en, this message translates to:
+  /// **'(archived)'**
+  String get channelArchivedLabel;
+
   /// Hint text for topic input widget in compose box.
   ///
   /// In en, this message translates to:

lib/generated/l10n/zulip_localizations_ar.dart

@@ -286,6 +286,9 @@ class ZulipLocalizationsAr extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 

lib/generated/l10n/zulip_localizations_en.dart

@@ -286,6 +286,9 @@ class ZulipLocalizationsEn extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 

lib/generated/l10n/zulip_localizations_ja.dart

@@ -286,6 +286,9 @@ class ZulipLocalizationsJa extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 

lib/generated/l10n/zulip_localizations_nb.dart

@@ -286,6 +286,9 @@ class ZulipLocalizationsNb extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 

lib/generated/l10n/zulip_localizations_pl.dart

@@ -286,6 +286,9 @@ class ZulipLocalizationsPl extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(nieznany kanał)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Wątek';
 

lib/generated/l10n/zulip_localizations_ru.dart

@@ -286,6 +286,9 @@ class ZulipLocalizationsRu extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Тема';
 

lib/generated/l10n/zulip_localizations_sk.dart

@@ -286,6 +286,9 @@ class ZulipLocalizationsSk extends ZulipLocalizations {
   @override
   String get unknownChannelName => '(unknown channel)';
 
+  @override
+  String get channelArchivedLabel => '(archived)';
+
   @override
   String get composeBoxTopicHintText => 'Topic';
 

lib/widgets/inbox.dart

@@ -222,7 +222,7 @@ abstract class _HeaderItem extends StatelessWidget {
   final _InboxPageState pageState;
   final int count;
   final bool hasMention;
-
+  final bool isArchived;
   /// A build context within the [_StreamSection] or [_AllDmsSection].
   ///
   /// Used to ensure the [_StreamSection] or [_AllDmsSection] that encloses the
@@ -236,6 +236,7 @@ abstract class _HeaderItem extends StatelessWidget {
     required this.count,
     required this.hasMention,
     required this.sectionContext,
+    this.isArchived = false,
   });
 
   String title(ZulipLocalizations zulipLocalizations);
@@ -284,16 +285,32 @@ abstract class _HeaderItem extends StatelessWidget {
           const SizedBox(width: 5),
           Expanded(child: Padding(
             padding: const EdgeInsets.symmetric(vertical: 4),
-            child: Text(
-              style: TextStyle(
-                fontSize: 17,
-                height: (20 / 17),
-                // TODO(design) check if this is the right variable
-                color: designVariables.labelMenuButton,
-              ).merge(weightVariableTextStyle(context, wght: 600)),
-              maxLines: 1,
-              overflow: TextOverflow.ellipsis,
-              title(zulipLocalizations)))),
+            child: Row(
+              children: [
+                Flexible(
+                  child: Text(
+                    style: TextStyle(
+                      fontSize: 17,
+                      height: (20 / 17),
+                      // TODO(design) check if this is the right variable
+                      color: designVariables.labelMenuButton,
+                    ).merge(weightVariableTextStyle(context, wght: 600)),
+                    maxLines: 1,
+                    overflow: TextOverflow.ellipsis,
+                    title(zulipLocalizations))),
+                if (isArchived)
+                  Text(
+                    ' ${zulipLocalizations.channelArchivedLabel}',
+                    style: TextStyle(
+                      fontSize: 17,
+                      height: (20 / 17),
+                      color: MessageListTheme.of(context).streamRecipientHeaderChevronRight,
+                      fontStyle: FontStyle.italic,
+                    ),
+                  ),
+              ],
+            ),
+          )),
           const SizedBox(width: 12),
           if (hasMention) const _IconMarker(icon: ZulipIcons.at_sign),
           Padding(padding: const EdgeInsetsDirectional.only(end: 16),
@@ -441,6 +458,7 @@ class _StreamHeaderItem extends _HeaderItem {
     required super.count,
     required super.hasMention,
     required super.sectionContext,
+    required super.isArchived,
   });
 
   @override String title(ZulipLocalizations zulipLocalizations) =>
@@ -487,6 +505,7 @@ class _StreamSection extends StatelessWidget {
       collapsed: collapsed,
       pageState: pageState,
       sectionContext: context,
+      isArchived: subscription.isArchived,
     );
     return StickyHeaderItem(
       header: header,