Merge pull request #2787 from matthewmcgarvey/related-channels

Update to fetch related channels again

src/invidious/channels/about.cr

@@ -1,33 +1,26 @@
 # TODO: Refactor into either SearchChannel or InvidiousChannel
-struct AboutChannel
-  include DB::Serializable
+record AboutChannel,
+  ucid : String,
+  author : String,
+  auto_generated : Bool,
+  author_url : String,
+  author_thumbnail : String,
+  banner : String?,
+  description_html : String,
+  total_views : Int64,
+  sub_count : Int32,
+  joined : Time,
+  is_family_friendly : Bool,
+  allowed_regions : Array(String),
+  tabs : Array(String)
 
-  property ucid : String
-  property author : String
-  property auto_generated : Bool
-  property author_url : String
-  property author_thumbnail : String
-  property banner : String?
-  property description_html : String
-  property total_views : Int64
-  property sub_count : Int32
-  property joined : Time
-  property is_family_friendly : Bool
-  property allowed_regions : Array(String)
-  property related_channels : Array(AboutRelatedChannel)
-  property tabs : Array(String)
-end
+record AboutRelatedChannel,
+  ucid : String,
+  author : String,
+  author_url : String,
+  author_thumbnail : String
 
-struct AboutRelatedChannel
-  include DB::Serializable
-
-  property ucid : String
-  property author : String
-  property author_url : String
-  property author_thumbnail : String
-end
-
-def get_about_info(ucid, locale)
+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==")
@@ -63,8 +56,6 @@ def get_about_info(ucid, locale)
 
     is_family_friendly = initdata["microformat"]["microformatDataRenderer"]["familySafe"].as_bool
     allowed_regions = initdata["microformat"]["microformatDataRenderer"]["availableCountries"].as_a.map(&.as_s)
-
-    related_channels = [] of AboutRelatedChannel
   else
     author = initdata["metadata"]["channelMetadataRenderer"]["title"].as_s
     author_url = initdata["metadata"]["channelMetadataRenderer"]["channelUrl"].as_s
@@ -85,38 +76,6 @@ def get_about_info(ucid, locale)
 
     is_family_friendly = initdata["microformat"]["microformatDataRenderer"]["familySafe"].as_bool
     allowed_regions = initdata["microformat"]["microformatDataRenderer"]["availableCountries"].as_a.map(&.as_s)
-
-    related_channels = initdata["contents"]["twoColumnBrowseResultsRenderer"]
-      .["secondaryContents"]?.try &.["browseSecondaryContentsRenderer"]["contents"][0]?
-      .try &.["verticalChannelSectionRenderer"]?.try &.["items"]?.try &.as_a.map do |node|
-        renderer = node["miniChannelRenderer"]?
-        related_id = renderer.try &.["channelId"]?.try &.as_s?
-        related_id ||= ""
-
-        related_title = renderer.try &.["title"]?.try &.["simpleText"]?.try &.as_s?
-        related_title ||= ""
-
-        related_author_url = renderer.try &.["navigationEndpoint"]?.try &.["commandMetadata"]?.try &.["webCommandMetadata"]?
-          .try &.["url"]?.try &.as_s?
-        related_author_url ||= ""
-
-        related_author_thumbnails = renderer.try &.["thumbnail"]?.try &.["thumbnails"]?.try &.as_a?
-        related_author_thumbnails ||= [] of JSON::Any
-
-        related_author_thumbnail = ""
-        if related_author_thumbnails.size > 0
-          related_author_thumbnail = related_author_thumbnails[-1]["url"]?.try &.as_s?
-          related_author_thumbnail ||= ""
-        end
-
-        AboutRelatedChannel.new({
-          ucid:             related_id,
-          author:           related_title,
-          author_url:       related_author_url,
-          author_thumbnail: related_author_thumbnail,
-        })
-      end
-    related_channels ||= [] of AboutRelatedChannel
   end
 
   total_views = 0_i64
@@ -155,7 +114,7 @@ def get_about_info(ucid, locale)
   sub_count = initdata["header"]["c4TabbedHeaderRenderer"]?.try &.["subscriberCountText"]?.try &.["simpleText"]?.try &.as_s?
     .try { |text| short_text_to_number(text.split(" ")[0]) } || 0
 
-  AboutChannel.new({
+  AboutChannel.new(
     ucid: ucid,
     author: author,
     auto_generated: auto_generated,
@@ -168,7 +127,31 @@ def get_about_info(ucid, locale)
     joined: joined,
     is_family_friendly: is_family_friendly,
     allowed_regions: allowed_regions,
-    related_channels:   related_channels,
     tabs: tabs,
-  })
+  )
+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 { |tab| tab.dig?("tabRenderer", "title").try(&.as_s?) == "Channels" }
+  return [] of AboutRelatedChannel if tab.nil?
+
+  items = tab.dig?("tabRenderer", "content", "sectionListRenderer", "contents", 0, "itemSectionRenderer", "contents", 0, "gridRenderer", "items").try(&.as_a?) || [] of JSON::Any
+
+  items.map do |item|
+    related_id = item.dig("gridChannelRenderer", "channelId").as_s
+    related_title = item.dig("gridChannelRenderer", "title", "simpleText").as_s
+    related_author_url = item.dig("gridChannelRenderer", "navigationEndpoint", "browseEndpoint", "canonicalBaseUrl").as_s
+    related_author_thumbnail = item.dig("gridChannelRenderer", "thumbnail", "thumbnails", -1, "url").as_s
+
+    AboutRelatedChannel.new(
+      ucid: related_id,
+      author: related_title,
+      author_url: related_author_url,
+      author_thumbnail: related_author_thumbnail,
+    )
+  end
 end

src/invidious/routes/api/v1/channels.cr

@@ -96,7 +96,7 @@ module Invidious::Routes::API::V1::Channels
 
         json.field "relatedChannels" do
           json.array do
-            channel.related_channels.each do |related_channel|
+            fetch_related_channels(channel).each do |related_channel|
               json.object do
                 json.field "author", related_channel.author
                 json.field "authorId", related_channel.ucid