Introduce Podcast Namespace

lib/domain/podcast/podcast.dart

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+import 'package:webfeed/domain/media/license.dart';
+import 'package:webfeed/domain/podcast/podcast_funding.dart';
+import 'package:webfeed/domain/podcast/podcast_guid.dart';
+import 'package:webfeed/domain/podcast/podcast_images.dart';
+import 'package:webfeed/domain/podcast/podcast_live_item.dart';
+import 'package:webfeed/domain/podcast/podcast_location.dart';
+import 'package:webfeed/domain/podcast/podcast_locked.dart';
+import 'package:webfeed/domain/podcast/podcast_medium.dart';
+import 'package:webfeed/domain/podcast/podcast_person.dart';
+import 'package:webfeed/domain/podcast/podcast_trailer.dart';
+import 'package:webfeed/domain/podcast/podcast_value.dart';
+import 'package:webfeed/util/iterable.dart';
+import 'package:xml/xml.dart';
+
+class Podcast {
+  final Locked? locked;
+  final Funding? funding;
+  final List<Person> people;
+  final Location? location;
+  final List<Trailer> trailers;
+  final License? license;
+  final Guid? guid;
+  final Value? value;
+  final Medium? medium;
+  final Images? images;
+  final List<LiveItem> liveItems;
+
+  Podcast({
+    this.locked,
+    this.funding,
+    required this.people,
+    this.location,
+    required this.trailers,
+    this.license,
+    this.guid,
+    this.value,
+    this.medium,
+    this.images,
+    required this.liveItems,
+  });
+
+  factory Podcast.parse(XmlElement element) {
+    return Podcast(
+      locked: element
+          .findElements('podcast:locked')
+          .map((e) => Locked.parse(e))
+          .firstOrNull,
+      funding: element
+          .findElements('podcast:funding')
+          .map((e) => Funding.parse(e))
+          .firstOrNull,
+      people: element
+          .findElements('podcast:person')
+          .map((e) => Person.parse(e))
+          .toList(),
+      location: element
+          .findElements('podcast:location')
+          .map((e) => Location.parse(e))
+          .firstOrNull,
+      trailers: element
+          .findElements('podcast:trailer')
+          .map((e) => Trailer.parse(e))
+          .toList(),
+      license: element
+          .findElements('podcast:license')
+          .map((e) => License.parse(e))
+          .firstOrNull,
+      guid: element
+          .findElements('podcast:guid')
+          .map((e) => Guid.parse(e))
+          .firstOrNull,
+      value: element
+          .findElements('podcast:value')
+          .map((e) => Value.parse(e))
+          .firstOrNull,
+      medium: element
+          .findElements('podcast:medium')
+          .map((e) => Medium.parse(e))
+          .firstOrNull,
+      images: element
+          .findElements('podcast:images')
+          .map((e) => Images.parse(e))
+          .firstOrNull,
+      liveItems: element
+          .findElements('podcast:liveItem')
+          .map((e) => LiveItem.parse(e))
+          .toList(),
+    );
+  }
+}

lib/domain/podcast/podcast_alternate_enclosure.dart

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+import 'package:webfeed/domain/podcast/podcast_integrity.dart';
+import 'package:webfeed/domain/podcast/podcast_source.dart';
+import 'package:xml/xml.dart';
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#alternate-enclosure
+class AlternateEnclosure {
+  final String? type;
+  final int? length;
+  final int? bitrate;
+  final int? height;
+  final String? lang;
+  final String? title;
+  final String? rel;
+  final String? codecs;
+  final String? default_;
+  final List<Source> sources;
+  final List<Integrity> integrities;
+
+  AlternateEnclosure({
+    this.type,
+    this.length,
+    this.bitrate,
+    this.height,
+    this.lang,
+    this.title,
+    this.rel,
+    this.codecs,
+    this.default_,
+    required this.sources,
+    required this.integrities,
+  });
+
+  factory AlternateEnclosure.parse(XmlElement element) {
+    final lengthStr = element.getAttribute('length');
+    final bitrateStr = element.getAttribute('bitrate');
+    final heightStr = element.getAttribute('height');
+    return AlternateEnclosure(
+      type: element.getAttribute('type'),
+      length: lengthStr == null ? null : int.tryParse(lengthStr),
+      bitrate: bitrateStr == null ? null : int.tryParse(bitrateStr),
+      height: heightStr == null ? null : int.tryParse(heightStr),
+      lang: element.getAttribute('lang'),
+      title: element.getAttribute('title'),
+      rel: element.getAttribute('rel'),
+      codecs: element.getAttribute('codecs'),
+      default_: element.getAttribute('default'),
+      sources: element
+          .findElements('podcast:source')
+          .map((e) => Source.parse(e))
+          .toList(),
+      integrities: element
+          .findElements('podcast:integrity')
+          .map((e) => Integrity.parse(e))
+          .toList(),
+    );
+  }
+}

lib/domain/podcast/podcast_chapters.dart

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+import 'package:xml/xml.dart';
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#chapters
+class Chapters {
+  final String? url;
+  final String? type;
+
+  Chapters({
+    this.url,
+    this.type,
+  });
+
+  factory Chapters.parse(XmlElement element) {
+    return Chapters(
+      url: element.getAttribute('url'),
+      type: element.getAttribute('type'),
+    );
+  }
+}

lib/domain/podcast/podcast_content_link.dart

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+import 'package:xml/xml.dart';
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#content-link
+class ContentLink {
+  final String? href;
+  final String? value;
+
+  ContentLink({
+    this.href,
+    this.value,
+  });
+
+  factory ContentLink.parse(XmlElement element) {
+    return ContentLink(
+      href: element.getAttribute('href'),
+      value: element.text,
+    );
+  }
+}

lib/domain/podcast/podcast_episode.dart

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+import 'package:xml/xml.dart';
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#episode
+class Episode {
+  final String? display;
+  final double? value;
+
+  Episode({
+    this.display,
+    this.value,
+  });
+
+  factory Episode.parse(XmlElement element) {
+    return Episode(
+      display: element.getAttribute('display'),
+      value: double.tryParse(element.text),
+    );
+  }
+}

lib/domain/podcast/podcast_funding.dart

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+import 'package:xml/xml.dart';
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#funding
+class Funding {
+  final String? url;
+  final String? value;
+
+  Funding({
+    this.url,
+    this.value,
+  });
+
+  factory Funding.parse(XmlElement element) {
+    return Funding(
+      url: element.getAttribute('url'),
+      value: element.text,
+    );
+  }
+}

lib/domain/podcast/podcast_guid.dart

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+import 'package:xml/xml.dart';
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#guid
+class Guid {
+  final String? value;
+
+  Guid({
+    this.value,
+  });
+
+  factory Guid.parse(XmlElement element) {
+    return Guid(
+      value: element.text,
+    );
+  }
+}

lib/domain/podcast/podcast_images.dart

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+import 'package:xml/xml.dart';
+
+final exp = RegExp(r'([^ ]+) (\d)+w');
+
+class Src {
+  final String? url;
+  final int? width;
+
+  Src({required this.url, required this.width});
+}
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#images
+class Images {
+  final List<Src> srcset;
+
+  Images({
+    required this.srcset,
+  });
+
+  factory Images.parse(XmlElement element) {
+    return Images(
+      srcset: element.getAttribute('srcset')?.split(', ').map((e) {
+            final matches = exp.allMatches(e).toList();
+            return Src(
+                url: matches[0].toString(),
+                width: int.tryParse(matches[1].toString()));
+          }).toList() ??
+          [],
+    );
+  }
+}

lib/domain/podcast/podcast_integrity.dart

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+import 'package:xml/xml.dart';
+
+// https://github.com/Podcastindex-org/podcast-namespace/blob/main/docs/1.0.md#integrity
+class Integrity {
+  final String? type;
+  final String? value;
+
+  Integrity({
+    this.type,
+    this.value,
+  });
+
+  factory Integrity.parse(XmlElement element) {
+    return Integrity(
+      type: element.getAttribute('type'),
+      value: element.getAttribute('value'),
+    );
+  }
+}

lib/domain/podcast/podcast_item.dart

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+import 'package:webfeed/domain/media/license.dart';
+import 'package:webfeed/domain/podcast/podcast_alternate_enclosure.dart';
+import 'package:webfeed/domain/podcast/podcast_chapters.dart';
+import 'package:webfeed/domain/podcast/podcast_content_link.dart';
+import 'package:webfeed/domain/podcast/podcast_episode.dart';
+import 'package:webfeed/domain/podcast/podcast_images.dart';
+import 'package:webfeed/domain/podcast/podcast_location.dart';
+import 'package:webfeed/domain/podcast/podcast_person.dart';
+import 'package:webfeed/domain/podcast/podcast_season.dart';
+import 'package:webfeed/domain/podcast/podcast_soundbite.dart';
+import 'package:webfeed/domain/podcast/podcast_transcript.dart';
+import 'package:webfeed/domain/podcast/podcast_value.dart';
+import 'package:webfeed/util/iterable.dart';
+import 'package:xml/xml.dart';
+
+class PodcastItem {
+  final Transcript? transcript;
+  final Chapters? chapters;
+  final List<Soundbite> soundbites;
+  final List<Person> people;
+  final Location? location;
+  final Season? season;
+  final Episode? episode;
+  final License? license;
+  final List<AlternateEnclosure> alternateEnclosures;
+  final Value? value;
+  final Images? images;
+  final List<ContentLink> contentLinks;
+
+  PodcastItem({
+    this.transcript,
+    this.chapters,
+    required this.soundbites,
+    required this.people,
+    this.location,
+    this.season,
+    this.episode,
+    this.license,
+    required this.alternateEnclosures,
+    this.value,
+    this.images,
+    required this.contentLinks,
+  });
+
+  factory PodcastItem.parse(XmlElement element) {
+    return PodcastItem(
+      transcript: element
+          .findElements('podcast:transcript')
+          .map((e) => Transcript.parse(e))
+          .firstOrNull,
+      chapters: element
+          .findElements('podcast:chapters')
+          .map((e) => Chapters.parse(e))
+          .firstOrNull,
+      soundbites: element
+          .findElements('podcast:soundbite')
+          .map((e) => Soundbite.parse(e))
+          .toList(),
+      people: element
+          .findElements('podcast:person')
+          .map((e) => Person.parse(e))
+          .toList(),
+      location: element
+          .findElements('podcast:location')
+          .map((e) => Location.parse(e))
+          .firstOrNull,
+      season: element
+          .findElements('podcast:season')
+          .map((e) => Season.parse(e))
+          .firstOrNull,
+      episode: element
+          .findElements('podcast:episode')
+          .map((e) => Episode.parse(e))
+          .firstOrNull,
+      license: element
+          .findElements('podcast:license')
+          .map((e) => License.parse(e))
+          .firstOrNull,
+      alternateEnclosures: element
+          .findElements('podcast:alternateEnclosure')
+          .map((e) => AlternateEnclosure.parse(e))
+          .toList(),
+      value: element
+          .findElements('podcast:value')
+          .map((e) => Value.parse(e))
+          .firstOrNull,
+      images: element
+          .findElements('podcast:images')
+          .map((e) => Images.parse(e))
+          .firstOrNull,
+      contentLinks: element
+          .findElements('podcast:contentLink')
+          .map((e) => ContentLink.parse(e))
+          .toList(),
+    );
+  }
+}