106 lines
3.2 KiB
Dart
106 lines
3.2 KiB
Dart
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import '../../core/contracts/tmdb.dart';
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import 'tmdb_image_url.dart';
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class TmdbImageSelector {
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static TmdbImage? bestImage(
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List<TmdbImage> images, {
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bool preferNeutral = false,
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}) {
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if (images.isEmpty) return null;
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if (preferNeutral) {
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final neutrals = images
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.where((i) => i.filePath.isNotEmpty && i.isLanguageNeutral)
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.toList();
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if (neutrals.isNotEmpty) return _pickBest(neutrals);
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}
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return _pickBest(images);
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}
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static TmdbImage? _pickBest(List<TmdbImage> images) {
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TmdbImage? best;
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for (final image in images) {
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if (image.filePath.isEmpty) continue;
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if (best == null || _isBetter(image, best)) best = image;
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}
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return best;
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}
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static String? backdropUrl(
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TmdbImageSet? imageSet,
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String? imageBaseUrl, {
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String size = 'original',
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}) {
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if (imageBaseUrl == null || imageBaseUrl.isEmpty) return null;
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final image = bestImage(
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imageSet?.backdrops ?? const [],
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preferNeutral: true,
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);
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return TmdbImageUrl.backdrop(imageBaseUrl, image?.filePath, size: size);
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}
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static String? posterUrl(
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TmdbImageSet? imageSet,
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String? imageBaseUrl, {
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String size = 'w500',
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}) {
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if (imageBaseUrl == null || imageBaseUrl.isEmpty) return null;
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final image = bestImage(imageSet?.posters ?? const []);
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return TmdbImageUrl.poster(imageBaseUrl, image?.filePath, size: size);
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}
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static String? logoUrl(
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TmdbImageSet? imageSet,
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String? imageBaseUrl, {
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String? language,
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String size = 'w500',
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}) {
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if (imageBaseUrl == null || imageBaseUrl.isEmpty) return null;
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final logos = imageSet?.logos ?? const <TmdbImage>[];
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if (logos.isEmpty) return null;
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final lang = _iso639Of(language);
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final image =
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(lang != null ? _pickBest(_withLang(logos, lang)) : null) ??
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_pickBest(_withLang(logos, 'en')) ??
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_pickBest(logos.where((i) => i.isLanguageNeutral).toList()) ??
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_pickBest(logos);
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return TmdbImageUrl.logo(imageBaseUrl, image?.filePath, size: size);
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}
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static List<TmdbImage> _withLang(List<TmdbImage> images, String iso) =>
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images.where((i) => i.iso639 == iso).toList();
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static String? _iso639Of(String? language) {
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if (language == null || language.isEmpty) return null;
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final dash = language.indexOf('-');
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final code = dash >= 0 ? language.substring(0, dash) : language;
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return code.isEmpty ? null : code.toLowerCase();
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}
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static List<String> buildFallbackUrls({
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required String? primaryUrl,
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required Iterable<String?> candidates,
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}) {
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final urls = <String>[];
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for (final url in candidates) {
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if (url == null || url.isEmpty || url == primaryUrl) continue;
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if (!urls.contains(url)) urls.add(url);
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}
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return urls;
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}
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static bool _isBetter(TmdbImage candidate, TmdbImage current) {
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final voteCompare = (candidate.voteAverage ?? 0).compareTo(
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current.voteAverage ?? 0,
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);
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if (voteCompare != 0) return voteCompare > 0;
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final pixelsCompare = (candidate.width * candidate.height).compareTo(
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current.width * current.height,
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);
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if (pixelsCompare != 0) return pixelsCompare > 0;
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return candidate.filePath.compareTo(current.filePath) < 0;
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}
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}
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