feat(mobile): enhance download operations (#12973)

* add packages

* create download task

* show progress

* save video and image

* show progress info

* live photo wip

* download and link live photos

* Update list of assets

* wip

* correct progress

* add state to download

* revert unncessary change

* repository pattern

* translation

* remove unused code

* update method call from repository

* remove unused variable

* handle multiple livephotos download

* remove logging statement

* lint

* not removing all records

mobile/lib/models/download/download_state.model.dart

@@ -0,0 +1,109 @@
+// ignore_for_file: public_member_api_docs, sort_constructors_first
+import 'dart:convert';
+
+import 'package:background_downloader/background_downloader.dart';
+import 'package:collection/collection.dart';
+
+class DownloadInfo {
+  final String fileName;
+  final double progress;
+  // enum
+  final TaskStatus status;
+
+  DownloadInfo({
+    required this.fileName,
+    required this.progress,
+    required this.status,
+  });
+
+  DownloadInfo copyWith({
+    String? fileName,
+    double? progress,
+    TaskStatus? status,
+  }) {
+    return DownloadInfo(
+      fileName: fileName ?? this.fileName,
+      progress: progress ?? this.progress,
+      status: status ?? this.status,
+    );
+  }
+
+  Map<String, dynamic> toMap() {
+    return <String, dynamic>{
+      'fileName': fileName,
+      'progress': progress,
+      'status': status.index,
+    };
+  }
+
+  factory DownloadInfo.fromMap(Map<String, dynamic> map) {
+    return DownloadInfo(
+      fileName: map['fileName'] as String,
+      progress: map['progress'] as double,
+      status: TaskStatus.values[map['status'] as int],
+    );
+  }
+
+  String toJson() => json.encode(toMap());
+
+  factory DownloadInfo.fromJson(String source) =>
+      DownloadInfo.fromMap(json.decode(source) as Map<String, dynamic>);
+
+  @override
+  String toString() =>
+      'DownloadInfo(fileName: $fileName, progress: $progress, status: $status)';
+
+  @override
+  bool operator ==(covariant DownloadInfo other) {
+    if (identical(this, other)) return true;
+
+    return other.fileName == fileName &&
+        other.progress == progress &&
+        other.status == status;
+  }
+
+  @override
+  int get hashCode => fileName.hashCode ^ progress.hashCode ^ status.hashCode;
+}
+
+class DownloadState {
+  // enum
+  final TaskStatus downloadStatus;
+  final Map<String, DownloadInfo> taskProgress;
+  final bool showProgress;
+  DownloadState({
+    required this.downloadStatus,
+    required this.taskProgress,
+    required this.showProgress,
+  });
+
+  DownloadState copyWith({
+    TaskStatus? downloadStatus,
+    Map<String, DownloadInfo>? taskProgress,
+    bool? showProgress,
+  }) {
+    return DownloadState(
+      downloadStatus: downloadStatus ?? this.downloadStatus,
+      taskProgress: taskProgress ?? this.taskProgress,
+      showProgress: showProgress ?? this.showProgress,
+    );
+  }
+
+  @override
+  String toString() =>
+      'DownloadState(downloadStatus: $downloadStatus, taskProgress: $taskProgress, showProgress: $showProgress)';
+
+  @override
+  bool operator ==(covariant DownloadState other) {
+    if (identical(this, other)) return true;
+    final mapEquals = const DeepCollectionEquality().equals;
+
+    return other.downloadStatus == downloadStatus &&
+        mapEquals(other.taskProgress, taskProgress) &&
+        other.showProgress == showProgress;
+  }
+
+  @override
+  int get hashCode =>
+      downloadStatus.hashCode ^ taskProgress.hashCode ^ showProgress.hashCode;
+}