✨ Complete the realm system

lib/widgets/realms/realm_deletion.dart

@@ -0,0 +1,101 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+import 'package:solian/models/realm.dart';
+import 'package:solian/providers/auth.dart';
+import 'package:solian/utils/service_url.dart';
+import 'package:solian/widgets/exts.dart';
+
+class RealmDeletion extends StatefulWidget {
+  final Realm realm;
+  final bool isOwned;
+
+  const RealmDeletion({
+    super.key,
+    required this.realm,
+    required this.isOwned,
+  });
+
+  @override
+  State<RealmDeletion> createState() => _RealmDeletionState();
+}
+
+class _RealmDeletionState extends State<RealmDeletion> {
+  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('passport', '/api/realms/${widget.realm.alias}'),
+    );
+    if (res.statusCode != 200) {
+      var message = utf8.decode(res.bodyBytes);
+      context.showErrorDialog(message);
+    } else if (Navigator.canPop(context)) {
+      Navigator.pop(context, true);
+    }
+
+    setState(() => _isSubmitting = false);
+  }
+
+  Future<void> leaveChannel() async {
+    setState(() => _isSubmitting = true);
+
+    final auth = context.read<AuthProvider>();
+    if (!await auth.isAuthorized()) {
+      setState(() => _isSubmitting = false);
+      return;
+    }
+
+    var res = await auth.client!.delete(
+      getRequestUri('passport', '/api/realms/${widget.realm.alias}/members/me'),
+    );
+    if (res.statusCode != 200) {
+      var message = utf8.decode(res.bodyBytes);
+      context.showErrorDialog(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),
+        ),
+      ],
+    );
+  }
+}