From fe4eef585523ea1e805afdfa106b7dde1f458f7e Mon Sep 17 00:00:00 2001
From: syeopite <syeopite@syeopite.dev>
Date: Fri, 2 Apr 2021 20:58:39 -0700
Subject: [PATCH] Fix channel info extract for 'video game' channels

---
 src/invidious/channels.cr | 76 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/src/invidious/channels.cr b/src/invidious/channels.cr
index 47dfcbd6..014df8d5 100644
--- a/src/invidious/channels.cr
+++ b/src/invidious/channels.cr
@@ -821,6 +821,19 @@ def get_about_info(ucid, locale)
     raise ChannelRedirect.new(channel_id: browse_endpoint["browseId"].to_s)
   end
 
+  auto_generated = false
+  if !initdata.has_key?("metadata")
+    auto_generated = true
+  end
+
+  if auto_generated
+    return get_auto_generated_channel_info(initdata, about, ucid)
+  else
+    return get_normal_channel_info(initdata, about)
+  end
+end
+
+def get_normal_channel_info(initdata, about)
   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
@@ -929,6 +942,69 @@ def get_about_info(ucid, locale)
   })
 end
 
+def get_auto_generated_channel_info(initdata, about, ucid)
+  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 = initdata["header"]["interactiveTabbedHeaderRenderer"]["description"]["simpleText"].as_s
+  description_html = HTML.escape(description).gsub("\n", "<br>")
+
+  paid = false
+  is_family_friendly = initdata["microformat"]["microformatDataRenderer"]["familySafe"].as_bool
+  allowed_regions = initdata["microformat"]["microformatDataRenderer"]["availableCountries"].as_a.map { |a| a.as_s }
+
+  related_channels = [] of AboutRelatedChannel
+
+  total_views = 0_i64
+  joined = Time.unix(0)
+  tabs = [] of String
+  auto_generated = true
+
+  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?
+        # 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, node| acc + node["text"].as_s }
+          .try { |text| Time.parse(text, "Joined %b %-d, %Y", Time::Location.local) } || Time.unix(0)
+      end
+    end
+    tabs = tabs_json.reject { |node| node["tabRenderer"]?.nil? }.map { |node| node["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_html:   description_html,
+    paid:               paid,
+    total_views:        total_views,
+    sub_count:          sub_count,
+    joined:             joined,
+    is_family_friendly: is_family_friendly,
+    allowed_regions:    allowed_regions,
+    related_channels:   related_channels,
+    tabs:               tabs,
+  })
+end
+
 def get_channel_videos_response(ucid, page = 1, auto_generated = nil, sort_by = "newest")
   continuation = produce_channel_videos_continuation(ucid, page,
     auto_generated: auto_generated, sort_by: sort_by, v2: true)