✨ Better channel list

lib/screens/channel/channel_chat.dart

@@ -33,6 +33,8 @@ class ChannelChatScreen extends StatefulWidget {
 
 class _ChannelChatScreenState extends State<ChannelChatScreen> {
   bool _isBusy = false;
+  int? _accountId;
+
   String? _overrideAlias;
 
   Channel? _channel;
@@ -41,6 +43,12 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
   final PagingController<int, Message> _pagingController =
       PagingController(firstPageKey: 0);
 
+  getProfile() async {
+    final AuthProvider auth = Get.find();
+    final prof = await auth.getProfile();
+    _accountId = prof.body['id'];
+  }
+
   getChannel({String? overrideAlias}) async {
     final ChannelProvider provider = Get.find();
 
@@ -167,6 +175,7 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
   void initState() {
     super.initState();
 
+    getProfile();
     getChannel().then((_) {
       listenMessages();
       _pagingController.addPageRequestListener(getMessages);
@@ -181,9 +190,22 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
       );
     }
 
+    String title = _channel?.name ?? 'loading'.tr;
+    String? placeholder;
+
+    if (_channel?.type == 1) {
+      final otherside = _channel!.members!
+          .where((e) => e.account.externalId != _accountId)
+          .first;
+      title = otherside.account.nick;
+      placeholder = 'messageInputPlaceholder'.trParams(
+        {'channel': '@${otherside.account.name}'},
+      );
+    }
+
     return Scaffold(
       appBar: AppBar(
-        title: Text(_channel?.name ?? 'loading'.tr),
+        title: Text(title),
         centerTitle: false,
         actions: [
           IconButton(
@@ -233,6 +255,7 @@ class _ChannelChatScreenState extends State<ChannelChatScreen> {
             right: 16,
             child: ChatMessageInput(
               realm: widget.realm,
+              placeholder: placeholder,
               channel: _channel!,
               onSent: (Message item) {
                 setState(() {

lib/screens/realms/realm_view.dart

@@ -276,6 +276,7 @@ class RealmChannelListWidget extends StatelessWidget {
               ChannelListWidget(
                 channels: channels,
                 selfId: snapshot.data?.body['id'] ?? 0,
+                noCategory: true,
               )
             ],
           ),

lib/translations.dart

@@ -144,6 +144,8 @@ class SolianMessages extends Translations {
           'channelDeletionConfirm': 'Confirm channel deletion',
           'channelDeletionConfirmCaption':
               'Are you sure to delete channel @channel? This action cannot be undone!',
+          'channelCategoryDirect': 'DM',
+          'channelCategoryDirectHint': 'Your direct messages',
           'messageDecoding': 'Decoding...',
           'messageDecodeFailed': 'Unable to decode: @message',
           'messageInputPlaceholder': 'Message @channel',
@@ -280,6 +282,8 @@ class SolianMessages extends Translations {
           'channelSettings': '频道设置',
           'channelDeletionConfirm': '确认删除频道',
           'channelDeletionConfirmCaption': '你确认要删除频道 @channel 吗？该操作不可撤销。',
+          'channelCategoryDirect': '私聊频道',
+          'channelCategoryDirectHint': '你的所有私聊频道',
           'messageDecoding': '解码信息中…',
           'messageDecodeFailed': '解码信息失败：@message',
           'messageInputPlaceholder': '在 @channel 发信息',

lib/widgets/channel/channel_list.dart

@@ -5,23 +5,61 @@ import 'package:solian/models/channel.dart';
 import 'package:solian/router.dart';
 import 'package:solian/widgets/account/account_avatar.dart';
 
-class ChannelListWidget extends StatelessWidget {
+class ChannelListWidget extends StatefulWidget {
   final List<Channel> channels;
   final int selfId;
+  final bool noCategory;
 
-  const ChannelListWidget(
-      {super.key, required this.channels, required this.selfId});
+  const ChannelListWidget({
+    super.key,
+    required this.channels,
+    required this.selfId,
+    this.noCategory = false,
+  });
 
   @override
-  Widget build(BuildContext context) {
-    return SliverList.builder(
-      itemCount: channels.length,
-      itemBuilder: (context, index) {
-        final element = channels[index];
+  State<ChannelListWidget> createState() => _ChannelListWidgetState();
+}
 
+class _ChannelListWidgetState extends State<ChannelListWidget> {
+  final List<Channel> _globalChannels = List.empty(growable: true);
+  final List<Channel> _directMessages = List.empty(growable: true);
+  final Map<String, List<Channel>> _inRealms = {};
+
+  void mapChannels() {
+    _inRealms.clear();
+    _globalChannels.clear();
+    _directMessages.clear();
+
+    if (widget.noCategory) {
+      _globalChannels.addAll(widget.channels);
+      return;
+    }
+
+    for (final channel in widget.channels) {
+      if (channel.realmId != null) {
+        if (_inRealms[channel.alias] == null) {
+          _inRealms[channel.alias] = List.empty(growable: true);
+        }
+        _inRealms[channel.alias]!.add(channel);
+      } else if (channel.type == 1) {
+        _directMessages.add(channel);
+      } else {
+        _globalChannels.add(channel);
+      }
+    }
+  }
+
+  @override
+  void didUpdateWidget(covariant ChannelListWidget oldWidget) {
+    setState(() => mapChannels());
+    super.didUpdateWidget(oldWidget);
+  }
+
+  Widget buildItem(Channel element) {
     if (element.type == 1) {
       final otherside = element.members!
-              .where((e) => e.account.externalId != selfId)
+          .where((e) => e.account.externalId != widget.selfId)
           .first;
 
       return ListTile(
@@ -70,7 +108,43 @@ class ChannelListWidget extends StatelessWidget {
         );
       },
     );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    if (widget.noCategory) {
+      return SliverList.builder(
+        itemCount: _globalChannels.length,
+        itemBuilder: (context, index) {
+          final element = _globalChannels[index];
+          return buildItem(element);
         },
       );
     }
+
+    return SliverList.list(
+      children: [
+        ..._globalChannels.map((e) => buildItem(e)),
+        if (_directMessages.isNotEmpty)
+          ExpansionTile(
+            tilePadding: const EdgeInsets.symmetric(horizontal: 24),
+            title: Text('channelCategoryDirect'.tr),
+            subtitle: Text('channelCategoryDirectHint'.tr),
+            children: _directMessages.map((e) => buildItem(e)).toList(),
+          ),
+        ..._inRealms.entries.map((element) {
+          return ExpansionTile(
+            tilePadding: const EdgeInsets.symmetric(horizontal: 24),
+            title: Text(element.value.first.realm!.name),
+            subtitle: Text(
+              element.value.first.realm!.description,
+              maxLines: 1,
+              overflow: TextOverflow.ellipsis,
+            ),
+            children: element.value.map((e) => buildItem(e)).toList(),
+          );
+        }),
+      ],
+    );
+  }
 }

lib/widgets/chat/chat_message_input.dart

@@ -12,6 +12,7 @@ import 'package:uuid/uuid.dart';
 class ChatMessageInput extends StatefulWidget {
   final Message? edit;
   final Message? reply;
+  final String? placeholder;
   final Channel channel;
   final String realm;
   final Function(Message) onSent;
@@ -20,6 +21,7 @@ class ChatMessageInput extends StatefulWidget {
     super.key,
     this.edit,
     this.reply,
+    this.placeholder,
     required this.channel,
     required this.realm,
     required this.onSent,
@@ -145,7 +147,8 @@ class _ChatMessageInputState extends State<ChatMessageInput> {
                   autocorrect: true,
                   keyboardType: TextInputType.text,
                   decoration: InputDecoration.collapsed(
-                    hintText: 'messageInputPlaceholder'.trParams(
+                    hintText: widget.placeholder ??
+                        'messageInputPlaceholder'.trParams(
                           {'channel': '#${widget.channel.alias}'},
                         ),
                   ),