72 lines
1.7 KiB
Dart
72 lines
1.7 KiB
Dart
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part of photogallery;
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/// A list of media with pagination support.
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@immutable
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class MediaPage {
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final Album album;
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/// The medium type of [items].
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final MediumType mediumType;
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/// The start offset for those media.
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final int start;
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/// The total number of items.
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final int total;
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/// The current items.
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final List<Medium> items;
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/// The end index in the album.
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int get end => start + items.length;
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///Indicates whether this page is the last in the album.
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bool get isLast => end >= total;
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/// Creates a range of media from platform channel protocol.
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MediaPage.fromJson(this.album, this.mediumType, dynamic json)
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: start = json['start'],
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total = json['total'],
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items = json['items'].map<Medium>((x) => Medium.fromJson(x)).toList();
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/// Gets the next page of media in the album.
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Future<MediaPage> nextPage() {
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assert(!isLast);
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return PhotoGallery._listMedia(
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album: album,
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mediumType: mediumType,
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total: total,
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skip: end,
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take: items.length,
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);
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}
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@override
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bool operator ==(Object other) =>
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identical(this, other) ||
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other is MediaPage &&
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runtimeType == other.runtimeType &&
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album == other.album &&
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mediumType == other.mediumType &&
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start == other.start &&
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total == other.total &&
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listEquals(items, other.items);
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@override
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int get hashCode =>
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album.hashCode ^
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mediumType.hashCode ^
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start.hashCode ^
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total.hashCode ^
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items.hashCode;
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@override
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String toString() {
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return 'MediaPage{album: $album, '
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'mediumType: $mediumType, '
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'start: $start, '
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'total: $total, '
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'items: $items}';
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}
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}
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