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# TODO: Refactor into either SearchChannel or InvidiousChannel
record AboutChannel,
ucid : String,
author : String,
auto_generated : Bool,
author_url : String,
author_thumbnail : String,
banner : String?,
description : String,
description_html : String,
total_views : Int64,
sub_count : Int32,
joined : Time,
is_family_friendly : Bool,
allowed_regions : Array(String),
tabs : Array(String),
verified : Bool
record AboutRelatedChannel,
ucid : String,
author : String,
author_url : String,
author_thumbnail : String
def get_about_info(ucid, locale) : AboutChannel
begin
# "EgVhYm91dA==" is the base64-encoded protobuf object {"2:string":"about"}
initdata = YoutubeAPI.browse(browse_id: ucid, params: "EgVhYm91dA==")
rescue
raise InfoException.new("Could not get channel info.")
end
if initdata.dig?("alerts", 0, "alertRenderer", "type") == "ERROR"
raise InfoException.new(initdata["alerts"][0]["alertRenderer"]["text"]["simpleText"].as_s)
end
if browse_endpoint = initdata["onResponseReceivedActions"]?.try &.[0]?.try &.["navigateAction"]?.try &.["endpoint"]?.try &.["browseEndpoint"]?
raise ChannelRedirect.new(channel_id: browse_endpoint["browseId"].to_s)
end
auto_generated = false
# Check for special auto generated gaming channels
if !initdata.has_key?("metadata")
auto_generated = true
end
if auto_generated
author = initdata["header"]["interactiveTabbedHeaderRenderer"]["title"]["simpleText"].as_s
author_url = initdata["microformat"]["microformatDataRenderer"]["urlCanonical"].as_s
author_thumbnail = initdata["header"]["interactiveTabbedHeaderRenderer"]["boxArt"]["thumbnails"][0]["url"].as_s
# Raises a KeyError on failure.
banners = initdata["header"]["interactiveTabbedHeaderRenderer"]?.try &.["banner"]?.try &.["thumbnails"]?
banner = banners.try &.[-1]?.try &.["url"].as_s?
description_node = initdata["header"]["interactiveTabbedHeaderRenderer"]["description"]
is_family_friendly = initdata["microformat"]["microformatDataRenderer"]["familySafe"].as_bool
allowed_regions = initdata["microformat"]["microformatDataRenderer"]["availableCountries"].as_a.map(&.as_s)
else
author = initdata["metadata"]["channelMetadataRenderer"]["title"].as_s
author_url = initdata["metadata"]["channelMetadataRenderer"]["channelUrl"].as_s
author_thumbnail = initdata["metadata"]["channelMetadataRenderer"]["avatar"]["thumbnails"][0]["url"].as_s
ucid = initdata["metadata"]["channelMetadataRenderer"]["externalId"].as_s
# Raises a KeyError on failure.
banners = initdata["header"]["c4TabbedHeaderRenderer"]?.try &.["banner"]?.try &.["thumbnails"]?
banner = banners.try &.[-1]?.try &.["url"].as_s?
# if banner.includes? "channels/c4/default_banner"
# banner = nil
# end
# author_verified_badges = initdata["header"]?.try &.["c4TabbedHeaderRenderer"]?.try &.["badges"]?
author_verified_badge = initdata["header"].dig?("c4TabbedHeaderRenderer", "badges", 0, "metadataBadgeRenderer", "tooltip")
author_verified = (author_verified_badge && author_verified_badge == "Verified")
description_node = initdata["metadata"]["channelMetadataRenderer"]?.try &.["description"]?
is_family_friendly = initdata["microformat"]["microformatDataRenderer"]["familySafe"].as_bool
allowed_regions = initdata["microformat"]["microformatDataRenderer"]["availableCountries"].as_a.map(&.as_s)
end
description = !description_node.nil? ? description_node.as_s : ""
description_html = HTML.escape(description)
if !description_node.nil?
if description_node.as_h?.nil?
description_node = text_to_parsed_content(description_node.as_s)
end
description_html = parse_content(description_node)
if description_html == "" && description != ""
description_html = HTML.escape(description)
end
end
total_views = 0_i64
joined = Time.unix(0)
tabs = [] of String
tabs_json = initdata["contents"]["twoColumnBrowseResultsRenderer"]["tabs"]?.try &.as_a?
if !tabs_json.nil?
# Retrieve information from the tabs array. The index we are looking for varies between channels.
tabs_json.each do |node|
# Try to find the about section which is located in only one of the tabs.
channel_about_meta = node["tabRenderer"]?.try &.["content"]?.try &.["sectionListRenderer"]?
.try &.["contents"]?.try &.[0]?.try &.["itemSectionRenderer"]?.try &.["contents"]?
.try &.[0]?.try &.["channelAboutFullMetadataRenderer"]?
if !channel_about_meta.nil?
total_views = channel_about_meta["viewCountText"]?.try &.["simpleText"]?.try &.as_s.gsub(/\D/, "").to_i64? || 0_i64
# The joined text is split to several sub strings. The reduce joins those strings before parsing the date.
joined = channel_about_meta["joinedDateText"]?.try &.["runs"]?.try &.as_a.reduce("") { |acc, nd| acc + nd["text"].as_s }
.try { |text| Time.parse(text, "Joined %b %-d, %Y", Time::Location.local) } || Time.unix(0)
# Normal Auto-generated channels
# https://support.google.com/youtube/answer/2579942
# For auto-generated channels, channel_about_meta only has ["description"]["simpleText"] and ["primaryLinks"][0]["title"]["simpleText"]
if (channel_about_meta["primaryLinks"]?.try &.size || 0) == 1 && (channel_about_meta["primaryLinks"][0]?) &&
(channel_about_meta["primaryLinks"][0]["title"]?.try &.["simpleText"]?.try &.as_s? || "") == "Auto-generated by YouTube"
auto_generated = true
end
end
end
tabs = tabs_json.reject { |node| node["tabRenderer"]?.nil? }.map(&.["tabRenderer"]["title"].as_s.downcase)
end
sub_count = initdata["header"]["c4TabbedHeaderRenderer"]?.try &.["subscriberCountText"]?.try &.["simpleText"]?.try &.as_s?
.try { |text| short_text_to_number(text.split(" ")[0]) } || 0
AboutChannel.new(
ucid: ucid,
author: author,
auto_generated: auto_generated,
author_url: author_url,
author_thumbnail: author_thumbnail,
banner: banner,
description: description,
description_html: description_html,
total_views: total_views,
sub_count: sub_count,
joined: joined,
is_family_friendly: is_family_friendly,
allowed_regions: allowed_regions,
tabs: tabs,
verified: author_verified || false,
)
end
def fetch_related_channels(about_channel : AboutChannel) : Array(AboutRelatedChannel)
# params is {"2:string":"channels"} encoded
channels = YoutubeAPI.browse(browse_id: about_channel.ucid, params: "EghjaGFubmVscw%3D%3D")
tabs = channels.dig?("contents", "twoColumnBrowseResultsRenderer", "tabs").try(&.as_a?) || [] of JSON::Any
tab = tabs.find(&.dig?("tabRenderer", "title").try(&.as_s?).try(&.== "Channels"))
return [] of AboutRelatedChannel if tab.nil?
items = tab.dig?(
"tabRenderer", "content",
"sectionListRenderer", "contents", 0,
"itemSectionRenderer", "contents", 0,
"gridRenderer", "items"
).try &.as_a?
related = [] of AboutRelatedChannel
return related if (items.nil? || items.empty?)
items.each do |item|
renderer = item["gridChannelRenderer"]?
next if !renderer
related_id = renderer.dig("channelId").as_s
related_title = renderer.dig("title", "simpleText").as_s
related_author_url = renderer.dig("navigationEndpoint", "browseEndpoint", "canonicalBaseUrl").as_s
related_author_thumbnail = HelperExtractors.get_thumbnails(renderer)
related << AboutRelatedChannel.new(
ucid: related_id,
author: related_title,
author_url: related_author_url,
author_thumbnail: related_author_thumbnail,
)
end
return related
end
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