1 files changed, 39 insertions, 0 deletions
diff --git a/lib/extensions/list_ext.dart b/lib/extensions/list_ext.dart
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+++ b/lib/extensions/list_ext.dart
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+// Copyright (C) 2025, uvok cheetah
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+extension ListExt<T> on List<T> {
+  /// If predicate is true for any element on the list, replace first element on that position.
+  /// Otherwise, add element.
+  void addOrReplaceWhere(T dev, bool Function(T exDev) predicate) {
+    int idx = indexWhere(predicate);
+
+    if (idx == -1) {
+      add(dev);
+    } else {
+      removeAt(idx);
+      insert(idx, dev);
+    }
+  }
+
+  /// An element if the predicate is true only for all elements.
+  /// predicate is passed all existing elements.
+  bool addIf(T dev, bool Function(T exDev) predicate) {
+    if (every(predicate)) {
+      add(dev);
+      return true;
+    }
+    return false;
+  }
+}