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Overhaul extractors.cr to use modules
This commit is contained in:
syeopite
parent
3dea670091
commit
142317c2be
@ -3,257 +3,245 @@
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# Tuple of Parsers/Extractors so we can easily cycle through them.
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private ITEM_CONTAINER_EXTRACTOR = {
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YoutubeTabsExtractor.new,
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SearchResultsExtractor.new,
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ContinuationExtractor.new,
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Extractors::YouTubeTabs,
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Extractors::SearchResults,
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Extractors::Continuation,
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}
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private ITEM_PARSERS = {
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VideoParser.new,
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ChannelParser.new,
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GridPlaylistParser.new,
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PlaylistParser.new,
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CategoryParser.new,
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Parsers::VideoRendererParser,
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Parsers::ChannelRendererParser,
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Parsers::GridPlaylistRendererParser,
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Parsers::PlaylistRendererParser,
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Parsers::CategoryRendererParser,
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}
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private struct AuthorFallback
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property name, id
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def initialize(@name : String? = nil, @id : String? = nil)
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end
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end
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record AuthorFallback, name : String? = nil, id : String? = nil
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# The following are the parsers for parsing raw item data into neatly packaged structs.
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# They're accessed through the process() method which validates the given data as applicable
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# to their specific struct and then use the internal parse() method to assemble the struct
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# specific to their category.
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private abstract struct ItemParser
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# Base type for all item parsers.
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def process(item : JSON::Any, author_fallback : AuthorFallback)
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end
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private def parse(item_contents : JSON::Any, author_fallback : AuthorFallback)
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end
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end
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private struct VideoParser < ItemParser
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def process(item, author_fallback)
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if item_contents = (item["videoRenderer"]? || item["gridVideoRenderer"]?)
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return self.parse(item_contents, author_fallback)
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end
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end
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private def parse(item_contents, author_fallback)
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video_id = item_contents["videoId"].as_s
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title = item_contents["title"].try { |t| t["simpleText"]?.try &.as_s || t["runs"]?.try &.as_a.map(&.["text"].as_s).join("") } || ""
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author_info = item_contents["ownerText"]?.try &.["runs"]?.try &.as_a?.try &.[0]?
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author = author_info.try &.["text"].as_s || author_fallback.name || ""
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author_id = author_info.try &.["navigationEndpoint"]?.try &.["browseEndpoint"]["browseId"].as_s || author_fallback.id || ""
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published = item_contents["publishedTimeText"]?.try &.["simpleText"]?.try { |t| decode_date(t.as_s) } || Time.local
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view_count = item_contents["viewCountText"]?.try &.["simpleText"]?.try &.as_s.gsub(/\D+/, "").to_i64? || 0_i64
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description_html = item_contents["descriptionSnippet"]?.try { |t| parse_content(t) } || ""
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length_seconds = item_contents["lengthText"]?.try &.["simpleText"]?.try &.as_s.try { |t| decode_length_seconds(t) } ||
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item_contents["thumbnailOverlays"]?.try &.as_a.find(&.["thumbnailOverlayTimeStatusRenderer"]?).try &.["thumbnailOverlayTimeStatusRenderer"]?
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.try &.["text"]?.try &.["simpleText"]?.try &.as_s.try { |t| decode_length_seconds(t) } || 0
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live_now = false
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paid = false
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premium = false
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premiere_timestamp = item_contents["upcomingEventData"]?.try &.["startTime"]?.try { |t| Time.unix(t.as_s.to_i64) }
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item_contents["badges"]?.try &.as_a.each do |badge|
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b = badge["metadataBadgeRenderer"]
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case b["label"].as_s
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when "LIVE NOW"
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live_now = true
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when "New", "4K", "CC"
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# TODO
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when "Premium"
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# TODO: Potentially available as item_contents["topStandaloneBadge"]["metadataBadgeRenderer"]
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premium = true
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else nil # Ignore
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private module Parsers
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module VideoRendererParser
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def self.process(item : JSON::Any, author_fallback : AuthorFallback)
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if item_contents = (item["videoRenderer"]? || item["gridVideoRenderer"]?)
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return self.parse(item_contents, author_fallback)
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end
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end
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SearchVideo.new({
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title: title,
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id: video_id,
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author: author,
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ucid: author_id,
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published: published,
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views: view_count,
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description_html: description_html,
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length_seconds: length_seconds,
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live_now: live_now,
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premium: premium,
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premiere_timestamp: premiere_timestamp,
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})
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end
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end
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private def self.parse(item_contents, author_fallback)
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video_id = item_contents["videoId"].as_s
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title = item_contents["title"].try { |t| t["simpleText"]?.try &.as_s || t["runs"]?.try &.as_a.map(&.["text"].as_s).join("") } || ""
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private struct ChannelParser < ItemParser
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def process(item, author_fallback)
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if item_contents = (item["channelRenderer"]? || item["gridChannelRenderer"]?)
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return self.parse(item_contents, author_fallback)
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end
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end
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author_info = item_contents["ownerText"]?.try &.["runs"]?.try &.as_a?.try &.[0]?
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author = author_info.try &.["text"].as_s || author_fallback.name || ""
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author_id = author_info.try &.["navigationEndpoint"]?.try &.["browseEndpoint"]["browseId"].as_s || author_fallback.id || ""
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private def parse(item_contents, author_fallback)
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author = item_contents["title"]["simpleText"]?.try &.as_s || author_fallback.name || ""
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author_id = item_contents["channelId"]?.try &.as_s || author_fallback.id || ""
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published = item_contents["publishedTimeText"]?.try &.["simpleText"]?.try { |t| decode_date(t.as_s) } || Time.local
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view_count = item_contents["viewCountText"]?.try &.["simpleText"]?.try &.as_s.gsub(/\D+/, "").to_i64? || 0_i64
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description_html = item_contents["descriptionSnippet"]?.try { |t| parse_content(t) } || ""
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length_seconds = item_contents["lengthText"]?.try &.["simpleText"]?.try &.as_s.try { |t| decode_length_seconds(t) } ||
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item_contents["thumbnailOverlays"]?.try &.as_a.find(&.["thumbnailOverlayTimeStatusRenderer"]?).try &.["thumbnailOverlayTimeStatusRenderer"]?
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.try &.["text"]?.try &.["simpleText"]?.try &.as_s.try { |t| decode_length_seconds(t) } || 0
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author_thumbnail = item_contents["thumbnail"]["thumbnails"]?.try &.as_a[0]?.try &.["url"]?.try &.as_s || ""
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subscriber_count = item_contents["subscriberCountText"]?.try &.["simpleText"]?.try &.as_s.try { |s| short_text_to_number(s.split(" ")[0]) } || 0
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live_now = false
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paid = false
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premium = false
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auto_generated = false
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auto_generated = true if !item_contents["videoCountText"]?
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video_count = item_contents["videoCountText"]?.try &.["runs"].as_a[0]?.try &.["text"].as_s.gsub(/\D/, "").to_i || 0
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description_html = item_contents["descriptionSnippet"]?.try { |t| parse_content(t) } || ""
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premiere_timestamp = item_contents["upcomingEventData"]?.try &.["startTime"]?.try { |t| Time.unix(t.as_s.to_i64) }
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SearchChannel.new({
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author: author,
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ucid: author_id,
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author_thumbnail: author_thumbnail,
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subscriber_count: subscriber_count,
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video_count: video_count,
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description_html: description_html,
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auto_generated: auto_generated,
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})
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end
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end
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item_contents["badges"]?.try &.as_a.each do |badge|
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b = badge["metadataBadgeRenderer"]
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case b["label"].as_s
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when "LIVE NOW"
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live_now = true
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when "New", "4K", "CC"
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# TODO
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when "Premium"
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# TODO: Potentially available as item_contents["topStandaloneBadge"]["metadataBadgeRenderer"]
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premium = true
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else nil # Ignore
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end
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end
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private struct GridPlaylistParser < ItemParser
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def process(item, author_fallback)
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if item_contents = item["gridPlaylistRenderer"]?
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return self.parse(item_contents, author_fallback)
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end
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end
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private def parse(item_contents, author_fallback)
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title = item_contents["title"]["runs"].as_a[0]?.try &.["text"].as_s || ""
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plid = item_contents["playlistId"]?.try &.as_s || ""
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video_count = item_contents["videoCountText"]["runs"].as_a[0]?.try &.["text"].as_s.gsub(/\D/, "").to_i || 0
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playlist_thumbnail = item_contents["thumbnail"]["thumbnails"][0]?.try &.["url"]?.try &.as_s || ""
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SearchPlaylist.new({
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title: title,
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id: plid,
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author: author_fallback.name || "",
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ucid: author_fallback.id || "",
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video_count: video_count,
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videos: [] of SearchPlaylistVideo,
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thumbnail: playlist_thumbnail,
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})
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end
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end
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private struct PlaylistParser < ItemParser
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def process(item, author_fallback)
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if item_contents = item["playlistRenderer"]?
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return self.parse(item_contents, author_fallback)
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end
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end
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def parse(item_contents, author_fallback)
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title = item_contents["title"]["simpleText"]?.try &.as_s || ""
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plid = item_contents["playlistId"]?.try &.as_s || ""
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video_count = item_contents["videoCount"]?.try &.as_s.to_i || 0
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playlist_thumbnail = item_contents["thumbnails"].as_a[0]?.try &.["thumbnails"]?.try &.as_a[0]?.try &.["url"].as_s || ""
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author_info = item_contents["shortBylineText"]?.try &.["runs"]?.try &.as_a?.try &.[0]?
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author = author_info.try &.["text"].as_s || author_fallback.name || ""
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author_id = author_info.try &.["navigationEndpoint"]?.try &.["browseEndpoint"]["browseId"].as_s || author_fallback.id || ""
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videos = item_contents["videos"]?.try &.as_a.map do |v|
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v = v["childVideoRenderer"]
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v_title = v["title"]["simpleText"]?.try &.as_s || ""
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v_id = v["videoId"]?.try &.as_s || ""
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v_length_seconds = v["lengthText"]?.try &.["simpleText"]?.try { |t| decode_length_seconds(t.as_s) } || 0
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SearchPlaylistVideo.new({
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title: v_title,
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id: v_id,
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length_seconds: v_length_seconds,
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SearchVideo.new({
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title: title,
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id: video_id,
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author: author,
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ucid: author_id,
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published: published,
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views: view_count,
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description_html: description_html,
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length_seconds: length_seconds,
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live_now: live_now,
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premium: premium,
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premiere_timestamp: premiere_timestamp,
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})
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end || [] of SearchPlaylistVideo
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# TODO: item_contents["publishedTimeText"]?
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SearchPlaylist.new({
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title: title,
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id: plid,
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author: author,
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ucid: author_id,
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video_count: video_count,
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videos: videos,
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thumbnail: playlist_thumbnail,
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})
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end
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end
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private struct CategoryParser < ItemParser
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def process(item, author_fallback)
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if item_contents = item["shelfRenderer"]?
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return self.parse(item_contents, author_fallback)
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end
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end
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def parse(item_contents, author_fallback)
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# Title extraction is a bit complicated. There are two possible routes for it
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# as well as times when the title attribute just isn't sent by YT.
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title_container = item_contents["title"]? || ""
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if !title_container.is_a? String
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if title = title_container["simpleText"]?
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title = title.as_s
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module ChannelRendererParser
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def self.process(item : JSON::Any, author_fallback : AuthorFallback)
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if item_contents = (item["channelRenderer"]? || item["gridChannelRenderer"]?)
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return self.parse(item_contents, author_fallback)
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end
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end
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private def self.parse(item_contents, author_fallback)
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author = item_contents["title"]["simpleText"]?.try &.as_s || author_fallback.name || ""
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author_id = item_contents["channelId"]?.try &.as_s || author_fallback.id || ""
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author_thumbnail = item_contents["thumbnail"]["thumbnails"]?.try &.as_a[0]?.try &.["url"]?.try &.as_s || ""
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subscriber_count = item_contents["subscriberCountText"]?.try &.["simpleText"]?.try &.as_s.try { |s| short_text_to_number(s.split(" ")[0]) } || 0
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auto_generated = false
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auto_generated = true if !item_contents["videoCountText"]?
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video_count = item_contents["videoCountText"]?.try &.["runs"].as_a[0]?.try &.["text"].as_s.gsub(/\D/, "").to_i || 0
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description_html = item_contents["descriptionSnippet"]?.try { |t| parse_content(t) } || ""
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SearchChannel.new({
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author: author,
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ucid: author_id,
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author_thumbnail: author_thumbnail,
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subscriber_count: subscriber_count,
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video_count: video_count,
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description_html: description_html,
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auto_generated: auto_generated,
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})
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end
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end
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module GridPlaylistRendererParser
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def self.process(item : JSON::Any, author_fallback : AuthorFallback)
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if item_contents = item["gridPlaylistRenderer"]?
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return self.parse(item_contents, author_fallback)
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end
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end
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private def self.parse(item_contents, author_fallback)
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title = item_contents["title"]["runs"].as_a[0]?.try &.["text"].as_s || ""
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plid = item_contents["playlistId"]?.try &.as_s || ""
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video_count = item_contents["videoCountText"]["runs"].as_a[0]?.try &.["text"].as_s.gsub(/\D/, "").to_i || 0
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playlist_thumbnail = item_contents["thumbnail"]["thumbnails"][0]?.try &.["url"]?.try &.as_s || ""
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SearchPlaylist.new({
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title: title,
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id: plid,
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author: author_fallback.name || "",
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ucid: author_fallback.id || "",
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video_count: video_count,
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videos: [] of SearchPlaylistVideo,
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thumbnail: playlist_thumbnail,
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})
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end
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end
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module PlaylistRendererParser
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def self.process(item : JSON::Any, author_fallback : AuthorFallback)
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if item_contents = item["playlistRenderer"]?
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return self.parse(item_contents, author_fallback)
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end
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end
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private def self.parse(item_contents, author_fallback)
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title = item_contents["title"]["simpleText"]?.try &.as_s || ""
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plid = item_contents["playlistId"]?.try &.as_s || ""
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video_count = item_contents["videoCount"]?.try &.as_s.to_i || 0
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playlist_thumbnail = item_contents["thumbnails"].as_a[0]?.try &.["thumbnails"]?.try &.as_a[0]?.try &.["url"].as_s || ""
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author_info = item_contents["shortBylineText"]?.try &.["runs"]?.try &.as_a?.try &.[0]?
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author = author_info.try &.["text"].as_s || author_fallback.name || ""
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author_id = author_info.try &.["navigationEndpoint"]?.try &.["browseEndpoint"]["browseId"].as_s || author_fallback.id || ""
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videos = item_contents["videos"]?.try &.as_a.map do |v|
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v = v["childVideoRenderer"]
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v_title = v["title"]["simpleText"]?.try &.as_s || ""
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v_id = v["videoId"]?.try &.as_s || ""
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v_length_seconds = v["lengthText"]?.try &.["simpleText"]?.try { |t| decode_length_seconds(t.as_s) } || 0
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SearchPlaylistVideo.new({
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title: v_title,
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id: v_id,
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length_seconds: v_length_seconds,
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})
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end || [] of SearchPlaylistVideo
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# TODO: item_contents["publishedTimeText"]?
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SearchPlaylist.new({
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title: title,
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id: plid,
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author: author,
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ucid: author_id,
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video_count: video_count,
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videos: videos,
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thumbnail: playlist_thumbnail,
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})
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end
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end
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module CategoryRendererParser
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def self.process(item : JSON::Any, author_fallback : AuthorFallback)
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if item_contents = item["shelfRenderer"]?
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return self.parse(item_contents, author_fallback)
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end
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end
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private def self.parse(item_contents, author_fallback)
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# Title extraction is a bit complicated. There are two possible routes for it
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# as well as times when the title attribute just isn't sent by YT.
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title_container = item_contents["title"]? || ""
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if !title_container.is_a? String
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if title = title_container["simpleText"]?
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title = title.as_s
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else
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title = title_container["runs"][0]["text"].as_s
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end
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else
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title = title_container["runs"][0]["text"].as_s
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title = ""
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end
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else
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title = ""
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end
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url = item_contents["endpoint"]?.try &.["commandMetadata"]["webCommandMetadata"]["url"].as_s
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url = item_contents["endpoint"]?.try &.["commandMetadata"]["webCommandMetadata"]["url"].as_s
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# Sometimes a category can have badges.
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badges = [] of Tuple(String, String) # (Badge style, label)
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item_contents["badges"]?.try &.as_a.each do |badge|
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badge = badge["metadataBadgeRenderer"]
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badges << {badge["style"].as_s, badge["label"].as_s}
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end
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# Category description
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description_html = item_contents["subtitle"]?.try { |desc| parse_content(desc) } || ""
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# Content parsing
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contents = [] of SearchItem
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# Content could be in three locations.
|
||||
if content_container = item_contents["content"]["horizontalListRenderer"]?
|
||||
elsif content_container = item_contents["content"]["expandedShelfContentsRenderer"]?
|
||||
elsif content_container = item_contents["content"]["verticalListRenderer"]?
|
||||
else
|
||||
content_container = item_contents["contents"]
|
||||
end
|
||||
|
||||
raw_contents = content_container["items"].as_a
|
||||
raw_contents.each do |item|
|
||||
result = extract_item(item)
|
||||
if !result.nil?
|
||||
contents << result
|
||||
# Sometimes a category can have badges.
|
||||
badges = [] of Tuple(String, String) # (Badge style, label)
|
||||
item_contents["badges"]?.try &.as_a.each do |badge|
|
||||
badge = badge["metadataBadgeRenderer"]
|
||||
badges << {badge["style"].as_s, badge["label"].as_s}
|
||||
end
|
||||
end
|
||||
|
||||
Category.new({
|
||||
title: title,
|
||||
contents: contents,
|
||||
description_html: description_html,
|
||||
url: url,
|
||||
badges: badges,
|
||||
})
|
||||
# Category description
|
||||
description_html = item_contents["subtitle"]?.try { |desc| parse_content(desc) } || ""
|
||||
|
||||
# Content parsing
|
||||
contents = [] of SearchItem
|
||||
|
||||
# Content could be in three locations.
|
||||
if content_container = item_contents["content"]["horizontalListRenderer"]?
|
||||
elsif content_container = item_contents["content"]["expandedShelfContentsRenderer"]?
|
||||
elsif content_container = item_contents["content"]["verticalListRenderer"]?
|
||||
else
|
||||
content_container = item_contents["contents"]
|
||||
end
|
||||
|
||||
raw_contents = content_container["items"].as_a
|
||||
raw_contents.each do |item|
|
||||
result = extract_item(item)
|
||||
if !result.nil?
|
||||
contents << result
|
||||
end
|
||||
end
|
||||
|
||||
Category.new({
|
||||
title: title,
|
||||
contents: contents,
|
||||
description_html: description_html,
|
||||
url: url,
|
||||
badges: badges,
|
||||
})
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
@ -262,88 +250,82 @@ end
|
||||
# a structure we can more easily use via the parsers above. Their internals are
|
||||
# identical to the item parsers.
|
||||
|
||||
private abstract struct ItemsContainerExtractor
|
||||
def process(item : Hash(String, JSON::Any))
|
||||
end
|
||||
|
||||
private def extract(target : JSON::Any)
|
||||
end
|
||||
end
|
||||
|
||||
private struct YoutubeTabsExtractor < ItemsContainerExtractor
|
||||
def process(initial_data)
|
||||
if target = initial_data["twoColumnBrowseResultsRenderer"]?
|
||||
self.extract(target)
|
||||
end
|
||||
end
|
||||
|
||||
private def extract(target)
|
||||
raw_items = [] of JSON::Any
|
||||
selected_tab = extract_selected_tab(target["tabs"])
|
||||
content = selected_tab["content"]
|
||||
|
||||
content["sectionListRenderer"]["contents"].as_a.each do |renderer_container|
|
||||
renderer_container = renderer_container["itemSectionRenderer"]
|
||||
renderer_container_contents = renderer_container["contents"].as_a[0]
|
||||
|
||||
# Category extraction
|
||||
if items_container = renderer_container_contents["shelfRenderer"]?
|
||||
raw_items << renderer_container_contents
|
||||
next
|
||||
elsif items_container = renderer_container_contents["gridRenderer"]?
|
||||
else
|
||||
items_container = renderer_container_contents
|
||||
end
|
||||
|
||||
items_container["items"].as_a.each do |item|
|
||||
raw_items << item
|
||||
private module Extractors
|
||||
module YouTubeTabs
|
||||
def self.process(initial_data : Hash(String, JSON::Any))
|
||||
if target = initial_data["twoColumnBrowseResultsRenderer"]?
|
||||
self.extract(target)
|
||||
end
|
||||
end
|
||||
|
||||
return raw_items
|
||||
end
|
||||
end
|
||||
private def self.extract(target)
|
||||
raw_items = [] of JSON::Any
|
||||
selected_tab = extract_selected_tab(target["tabs"])
|
||||
content = selected_tab["content"]
|
||||
|
||||
private struct SearchResultsExtractor < ItemsContainerExtractor
|
||||
def process(initial_data)
|
||||
if target = initial_data["twoColumnSearchResultsRenderer"]?
|
||||
self.extract(target)
|
||||
content["sectionListRenderer"]["contents"].as_a.each do |renderer_container|
|
||||
renderer_container = renderer_container["itemSectionRenderer"]
|
||||
renderer_container_contents = renderer_container["contents"].as_a[0]
|
||||
|
||||
# Category extraction
|
||||
if items_container = renderer_container_contents["shelfRenderer"]?
|
||||
raw_items << renderer_container_contents
|
||||
next
|
||||
elsif items_container = renderer_container_contents["gridRenderer"]?
|
||||
else
|
||||
items_container = renderer_container_contents
|
||||
end
|
||||
|
||||
items_container["items"].as_a.each do |item|
|
||||
raw_items << item
|
||||
end
|
||||
end
|
||||
|
||||
return raw_items
|
||||
end
|
||||
end
|
||||
|
||||
private def extract(target)
|
||||
raw_items = [] of Array(JSON::Any)
|
||||
content = target["primaryContents"]
|
||||
renderer = content["sectionListRenderer"]["contents"].as_a.each do |node|
|
||||
if node = node["itemSectionRenderer"]?
|
||||
raw_items << node["contents"].as_a
|
||||
module SearchResults
|
||||
def self.process(initial_data : Hash(String, JSON::Any))
|
||||
if target = initial_data["twoColumnSearchResultsRenderer"]?
|
||||
self.extract(target)
|
||||
end
|
||||
end
|
||||
|
||||
raw_items = raw_items.flatten
|
||||
private def self.extract(target)
|
||||
raw_items = [] of Array(JSON::Any)
|
||||
content = target["primaryContents"]
|
||||
renderer = content["sectionListRenderer"]["contents"].as_a.each do |node|
|
||||
if node = node["itemSectionRenderer"]?
|
||||
raw_items << node["contents"].as_a
|
||||
end
|
||||
end
|
||||
|
||||
return raw_items
|
||||
end
|
||||
end
|
||||
raw_items = raw_items.flatten
|
||||
|
||||
private struct ContinuationExtractor < ItemsContainerExtractor
|
||||
def process(initial_data)
|
||||
if target = initial_data["continuationContents"]?
|
||||
self.extract(target)
|
||||
elsif target = initial_data["appendContinuationItemsAction"]?
|
||||
self.extract(target)
|
||||
return raw_items
|
||||
end
|
||||
end
|
||||
|
||||
private def extract(target)
|
||||
raw_items = [] of JSON::Any
|
||||
if content = target["gridContinuation"]?
|
||||
raw_items = content["items"].as_a
|
||||
elsif content = target["continuationItems"]?
|
||||
raw_items = content.as_a
|
||||
module Continuation
|
||||
def self.process(initial_data : Hash(String, JSON::Any))
|
||||
if target = initial_data["continuationContents"]?
|
||||
self.extract(target)
|
||||
elsif target = initial_data["appendContinuationItemsAction"]?
|
||||
self.extract(target)
|
||||
end
|
||||
end
|
||||
|
||||
return raw_items
|
||||
private def self.extract(target)
|
||||
raw_items = [] of JSON::Any
|
||||
if content = target["gridContinuation"]?
|
||||
raw_items = content["items"].as_a
|
||||
elsif content = target["continuationItems"]?
|
||||
raw_items = content.as_a
|
||||
end
|
||||
|
||||
return raw_items
|
||||
end
|
||||
end
|
||||
end
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user