Source Code added

mobile/lib/extensions/collection_extensions.dart

@@ -0,0 +1,72 @@
+import 'dart:typed_data';
+
+import 'package:collection/collection.dart';
+import 'package:immich_mobile/domain/models/user.model.dart';
+import 'package:immich_mobile/entities/asset.entity.dart';
+import 'package:immich_mobile/utils/hash.dart';
+
+extension ListExtension<E> on List<E> {
+  List<E> uniqueConsecutive({int Function(E a, E b)? compare, void Function(E a, E b)? onDuplicate}) {
+    compare ??= (E a, E b) => a == b ? 0 : 1;
+    int i = 1, j = 1;
+    for (; i < length; i++) {
+      if (compare(this[i - 1], this[i]) != 0) {
+        if (i != j) {
+          this[j] = this[i];
+        }
+        j++;
+      } else if (onDuplicate != null) {
+        onDuplicate(this[i - 1], this[i]);
+      }
+    }
+    length = length == 0 ? 0 : j;
+    return this;
+  }
+
+  ListSlice<E> nestedSlice(int start, int end) {
+    if (this is ListSlice) {
+      final ListSlice<E> self = this as ListSlice<E>;
+      return ListSlice<E>(self.source, self.start + start, self.start + end);
+    }
+    return ListSlice<E>(this, start, end);
+  }
+}
+
+extension IntListExtension on Iterable<int> {
+  Int64List toInt64List() {
+    final list = Int64List(length);
+    list.setAll(0, this);
+    return list;
+  }
+}
+
+extension AssetListExtension on Iterable<Asset> {
+  /// Returns the assets that are already available in the Immich server
+  Iterable<Asset> remoteOnly({void Function()? errorCallback}) {
+    final bool onlyRemote = every((e) => e.isRemote);
+    if (!onlyRemote) {
+      if (errorCallback != null) errorCallback();
+      return where((a) => a.isRemote);
+    }
+    return this;
+  }
+
+  /// Returns the assets that are owned by the user passed to the [owner] param
+  /// If [owner] is null, an empty list is returned
+  Iterable<Asset> ownedOnly(UserDto? owner, {void Function()? errorCallback}) {
+    if (owner == null) return [];
+    final isarUserId = fastHash(owner.id);
+    final bool onlyOwned = every((e) => e.ownerId == isarUserId);
+    if (!onlyOwned) {
+      if (errorCallback != null) errorCallback();
+      return where((a) => a.ownerId == isarUserId);
+    }
+    return this;
+  }
+}
+
+extension SortedByProperty<T> on Iterable<T> {
+  Iterable<T> sortedByField(Comparable Function(T e) key) {
+    return sorted((a, b) => key(a).compareTo(key(b)));
+  }
+}