✨ Leave & delete channel

lib/i18n/app_en.arb

@@ -22,6 +22,7 @@
   "edit": "Edit",
   "apply": "Apply",
   "delete": "Delete",
+  "exit": "Exit",
   "action": "Action",
   "cancel": "Cancel",
   "report": "Report",
@@ -72,6 +73,8 @@
   "chatChannelAliasLabel": "Channel Alias",
   "chatChannelNameLabel": "Channel Name",
   "chatChannelDescriptionLabel": "Channel Description",
+  "chatChannelLeaveConfirm": "Are you sure you want to leave this channel? Your message will be stored, but if you rejoin this channel later, you will lose your control of your previous messages.",
+  "chatChannelDeleteConfirm": "Are you sure you want to delete this channel? All messages in this channel will be gone forever. This operation cannot be revert!",
   "chatMessagePlaceholder": "Write a message...",
   "chatMessageEditNotify": "You are about editing a message.",
   "chatMessageReplyNotify": "You are about replying a message.",

lib/i18n/app_zh.arb

@@ -24,6 +24,7 @@
   "action": "操作",
   "apply": "应用",
   "cancel": "取消",
+  "exit": "离开",
   "report": "举报",
   "reply": "回复",
   "settings": "设置",
@@ -72,6 +73,8 @@
   "chatChannelAliasLabel": "频道别名",
   "chatChannelNameLabel": "频道名称",
   "chatChannelDescriptionLabel": "频道简介",
+  "chatChannelLeaveConfirm": "你确定你要离开这个频道吗？你在这个频道里的消息将被存储下来，但是当你重新加入本频道后你将会失去对你之前消息的权限。",
+  "chatChannelDeleteConfirm": "你确定你要删除这个频道吗？这个频道里的所有消息都将消失，并且不可被反转！",
   "chatMessagePlaceholder": "发条消息……",
   "chatMessageEditNotify": "你正在编辑信息中……",
   "chatMessageReplyNotify": "你正在回复消息中……",

lib/screens/chat/chat.dart

@@ -32,17 +32,19 @@ class _ChatScreenState extends State<ChatScreen> {
 
   final http.Client _client = http.Client();
 
-  Future<void> fetchMetadata() async {
+  Future<Channel> fetchMetadata() async {
     var uri = getRequestUri('messaging', '/api/channels/${widget.alias}');
     var res = await _client.get(uri);
     if (res.statusCode == 200) {
       final result = jsonDecode(utf8.decode(res.bodyBytes));
       setState(() => _channelMeta = Channel.fromJson(result));
+      return _channelMeta!;
     } else {
       var message = utf8.decode(res.bodyBytes);
       ScaffoldMessenger.of(context).showSnackBar(
         SnackBar(content: Text("Something went wrong... $message")),
       );
+      throw Exception(message);
     }
   }
 
@@ -137,7 +139,15 @@ class _ChatScreenState extends State<ChatScreen> {
       appBarActions: [
         _channelMeta != null ? ChannelAction(channel: _channelMeta!, onUpdate: () => fetchMetadata()) : Container(),
       ],
-      child: ChatMaintainer(
+      child: FutureBuilder(
+        future: fetchMetadata(),
+        builder: (context, snapshot) {
+          if (!snapshot.hasData || snapshot.data == null) {
+            return const Center(child: CircularProgressIndicator());
+          }
+
+          return ChatMaintainer(
+            channel: snapshot.data!,
             child: Column(
               children: [
                 Expanded(
@@ -188,6 +198,8 @@ class _ChatScreenState extends State<ChatScreen> {
             onInsertMessage: (message) => addMessage(message),
             onUpdateMessage: (message) => updateMessage(message),
             onDeleteMessage: (message) => deleteMessage(message),
+          );
+        },
       ),
     );
   }

lib/screens/chat/index.dart

@@ -99,13 +99,17 @@ class _ChatIndexScreenState extends State<ChatIndexScreen> {
                     ),
                     title: Text(element.name),
                     subtitle: Text(element.description),
-                    onTap: () {
+                    onTap: () async {
-                      router.pushNamed(
+                      final result = await router.pushNamed(
                         'chat.channel',
                         pathParameters: {
                           'channel': element.alias,
                         },
                       );
+                      switch(result) {
+                        case 'refresh':
+                          fetchChannels();
+                      }
                     },
                   );
                 },

lib/screens/chat/manage.dart

@@ -1,8 +1,10 @@
+import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:solian/models/channel.dart';
 import 'package:solian/providers/auth.dart';
 import 'package:solian/router.dart';
+import 'package:solian/widgets/chat/channel_deletion.dart';
 import 'package:solian/widgets/indent_wrapper.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 
@@ -16,7 +18,20 @@ class ChatManageScreen extends StatefulWidget {
 }
 
 class _ChatManageScreenState extends State<ChatManageScreen> {
-  bool isOwned = false;
+  bool _isOwned = false;
+
+  void promptLeaveChannel() async {
+    final did = await showDialog(
+      context: context,
+      builder: (context) => ChannelDeletion(
+        channel: widget.channel,
+        isOwned: _isOwned,
+      ),
+    );
+    if (did == true && router.canPop()) {
+      router.pop('disposed');
+    }
+  }
 
   @override
   void initState() {
@@ -27,7 +42,7 @@ class _ChatManageScreenState extends State<ChatManageScreen> {
       final prof = await auth.getProfiles();
 
       setState(() {
-        isOwned = prof['id'] == widget.channel.account.externalId;
+        _isOwned = prof['id'] == widget.channel.account.externalId;
       });
     });
   }
@@ -41,7 +56,7 @@ class _ChatManageScreenState extends State<ChatManageScreen> {
         onTap: () async {
           router.pushNamed('chat.channel.editor', extra: widget.channel).then((did) {
             if (did == true) {
-              if (router.canPop()) router.pop(true);
+              if (router.canPop()) router.pop('refresh');
             }
           });
         },
@@ -64,10 +79,12 @@ class _ChatManageScreenState extends State<ChatManageScreen> {
                   child: Icon(Icons.tag, color: Colors.white),
                 ),
                 const SizedBox(width: 16),
-                Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
+                Expanded(
+                  child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
                     Text(widget.channel.name, style: Theme.of(context).textTheme.bodyLarge),
                     Text(widget.channel.description, style: Theme.of(context).textTheme.bodySmall),
-                ])
+                  ]),
+                )
               ],
             ),
           ),
@@ -91,7 +108,13 @@ class _ChatManageScreenState extends State<ChatManageScreen> {
                     );
                   },
                 ),
-                ...(isOwned ? authorizedItems : List.empty()),
+                ...(_isOwned ? authorizedItems : List.empty()),
+                const Divider(thickness: 0.3),
+                ListTile(
+                  leading: _isOwned ? const Icon(Icons.delete) : const Icon(Icons.exit_to_app),
+                  title: Text(_isOwned ? AppLocalizations.of(context)!.delete : AppLocalizations.of(context)!.exit),
+                  onTap: () => promptLeaveChannel(),
+                ),
               ],
             ),
           ),

lib/widgets/chat/channel_action.dart

@@ -13,12 +13,18 @@ class ChannelAction extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return IconButton(
-      onPressed: () {
+      onPressed: () async {
-        router.pushNamed(
+        final result = await router.pushNamed(
           'chat.channel.manage',
           extra: channel,
           pathParameters: {'channel': channel.alias},
         );
+        switch(result) {
+          case 'disposed':
+            if(router.canPop()) router.pop('refresh');
+          case 'refresh':
+            onUpdate();
+        }
       },
       focusNode: _focusNode,
       style: TextButton.styleFrom(shape: const CircleBorder()),

lib/widgets/chat/channel_deletion.dart

@@ -0,0 +1,100 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:solian/models/channel.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+import 'package:solian/providers/auth.dart';
+import 'package:solian/utils/service_url.dart';
+
+class ChannelDeletion extends StatefulWidget {
+  final Channel channel;
+  final bool isOwned;
+
+  const ChannelDeletion({super.key, required this.channel, required this.isOwned});
+
+  @override
+  State<ChannelDeletion> createState() => _ChannelDeletionState();
+}
+
+class _ChannelDeletionState extends State<ChannelDeletion> {
+  bool _isSubmitting = false;
+
+  Future<void> deleteChannel() async {
+    setState(() => _isSubmitting = true);
+
+    final auth = context.read<AuthProvider>();
+    if (!await auth.isAuthorized()) {
+      setState(() => _isSubmitting = false);
+      return;
+    }
+
+    var res = await auth.client!.delete(
+      getRequestUri('messaging', '/api/channels/${widget.channel.id}'),
+    );
+    if (res.statusCode != 200) {
+      var message = utf8.decode(res.bodyBytes);
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text("Something went wrong... $message")),
+      );
+    } else if (Navigator.canPop(context)) {
+      Navigator.pop(context, true);
+    }
+
+    setState(() => _isSubmitting = false);
+  }
+
+  Future<void> leaveChannel() async {
+    setState(() => _isSubmitting = true);
+
+    final auth = context.read<AuthProvider>();
+    if (!await auth.isAuthorized()) {
+      setState(() => _isSubmitting = false);
+      return;
+    }
+
+    var res = await auth.client!.post(
+      getRequestUri('messaging', '/api/channels/${widget.channel.alias}/leave'),
+    );
+    if (res.statusCode != 200) {
+      var message = utf8.decode(res.bodyBytes);
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text("Something went wrong... $message")),
+      );
+    } else if (Navigator.canPop(context)) {
+      Navigator.pop(context, true);
+    }
+
+    setState(() => _isSubmitting = false);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final content = widget.isOwned
+        ? AppLocalizations.of(context)!.chatChannelDeleteConfirm
+        : AppLocalizations.of(context)!.chatChannelLeaveConfirm;
+
+    return AlertDialog(
+      title: Text(AppLocalizations.of(context)!.confirmation),
+      content: Text(content),
+      actions: <Widget>[
+        TextButton(
+          onPressed: _isSubmitting ? null : () => Navigator.pop(context),
+          child: Text(AppLocalizations.of(context)!.confirmCancel),
+        ),
+        TextButton(
+          onPressed: _isSubmitting
+              ? null
+              : () {
+                  if (widget.isOwned) {
+                    deleteChannel();
+                  } else {
+                    leaveChannel();
+                  }
+                },
+          child: Text(AppLocalizations.of(context)!.confirmOkay),
+        ),
+      ],
+    );
+  }
+}

lib/widgets/chat/maintainer.dart

@@ -2,6 +2,7 @@ import 'dart:convert';
 
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
+import 'package:solian/models/channel.dart';
 import 'package:solian/models/message.dart';
 import 'package:solian/models/packet.dart';
 import 'package:solian/providers/auth.dart';
@@ -10,6 +11,7 @@ import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 
 class ChatMaintainer extends StatefulWidget {
   final Widget child;
+  final Channel channel;
   final Function(Message val) onInsertMessage;
   final Function(Message val) onUpdateMessage;
   final Function(Message val) onDeleteMessage;
@@ -17,6 +19,7 @@ class ChatMaintainer extends StatefulWidget {
   const ChatMaintainer({
     super.key,
     required this.child,
+    required this.channel,
     required this.onInsertMessage,
     required this.onUpdateMessage,
     required this.onDeleteMessage,
@@ -46,13 +49,16 @@ class _ChatMaintainerState extends State<ChatMaintainer> {
           final result = NetworkPackage.fromJson(jsonDecode(event));
           switch (result.method) {
             case 'messages.new':
-              widget.onInsertMessage(Message.fromJson(result.payload!));
+              final payload = Message.fromJson(result.payload!);
+              if (payload.channelId == widget.channel.id) widget.onInsertMessage(payload);
               break;
             case 'messages.update':
-              widget.onUpdateMessage(Message.fromJson(result.payload!));
+              final payload = Message.fromJson(result.payload!);
+              if (payload.channelId == widget.channel.id) widget.onUpdateMessage(payload);
               break;
             case 'messages.burnt':
-              widget.onDeleteMessage(Message.fromJson(result.payload!));
+              final payload = Message.fromJson(result.payload!);
+              if (payload.channelId == widget.channel.id) widget.onDeleteMessage(payload);
               break;
           }
         },