Can delete custom emoji

lib/helpers/settings_helper.dart

@@ -125,7 +125,7 @@ class SettingsHelper {
               .exec())
           .isOK;
 
-  /// Upload a new emoji
+  /// Upload a new custom emoji
   static Future<void> uploadNewCustomEmoji(NewEmoji newEmoji) async =>
       (await APIRequest(
                   uri: "settings/upload_custom_emoji",
@@ -134,4 +134,13 @@ class SettingsHelper {
               .addFile("image", newEmoji.image)
               .execWithFiles())
           .assertOk();
+
+  /// Delete a custom emoji
+  ///
+  /// Throws in case of failure
+  static Future<void> deleteCustomEmoji(int emojiID) async =>
+      (await APIRequest(uri: "settings/delete_custom_emoji", needLogin: true)
+              .addInt("emojiID", emojiID)
+              .exec())
+          .assertOk();
 }

lib/ui/routes/account_settings/custom_emojies_account_settings.dart

@@ -3,6 +3,7 @@ import 'dart:io';
 import 'package:comunic/helpers/settings_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
 import 'package:comunic/lists/custom_emojies_list.dart';
+import 'package:comunic/models/custom_emoji.dart';
 import 'package:comunic/models/new_emoji.dart';
 import 'package:comunic/models/user.dart';
 import 'package:comunic/ui/widgets/async_screen_widget.dart';
@@ -71,6 +72,9 @@ class _CustomEmojiesAccountBodyState extends State<_CustomEmojiesAccountBody> {
             .map((u) => ListTile(
                   leading: NetworkImageWidget(url: u.url, width: 50),
                   title: Text(u.shortcut),
+                  trailing: IconButton(
+                      icon: Icon(Icons.delete),
+                      onPressed: () => _deleteEmoji(u)),
                 ))
             .toList());
   }
@@ -106,6 +110,22 @@ class _CustomEmojiesAccountBodyState extends State<_CustomEmojiesAccountBody> {
 
     _key.currentState.refresh();
   }
+
+  /// Ask for confirmation before deleting permanently an emoji
+  void _deleteEmoji(CustomEmoji u) async {
+    try {
+      if (!await showConfirmDialog(
+          context: context,
+          message: tr("Do you really want to delete this custom emoji ?")))
+        return;
+
+      await SettingsHelper.deleteCustomEmoji(u.id);
+
+      _key.currentState.refresh();
+    } catch (e, stack) {
+      print("Could not delete custom emoji! $e\n$stack");
+    }
+  }
 }
 
 /// Dialog used to upload new custom emojies