fix: correctly parse premiere_timestamp on channel videos (#6140)

Closes: https://github.com/iv-org/invidious/issues/6135

src/invidious/helpers/utils.cr

@@ -94,6 +94,20 @@ def decode_date(string : String)
     return Time.utc(string.to_i, 1, 1)
   end
 
+  # Try to parse "Premieres 6/29/27, 9:00 PM"
+  # For some reason, the Innertube response contains a '\u202F'
+  # character in the separation between the time and the period
+  # so the raw string returned by Innertube is something like this:
+  # "Premieres 6/29/27, 9:00\u202FPM". Instead of using a space character
+  # it uses the '\u202F' character.
+  #
+  # Raw: "Premieres 6/29/27, 9:00 PM"
+  begin
+    string2 = string.lchop("Premieres ").gsub('\u202F', " ")
+    return Time.parse(string2, "%m/%d/%y, %l:%M %p", Time::Location.local)
+  rescue
+  end
+
   # Try to parse as format Jul 10, 2000
   begin
     return Time.parse(string, "%b %-d, %Y", Time::Location.local)

src/invidious/yt_backend/extractors.cr

@@ -712,6 +712,7 @@ private module Parsers
         title = metadata.dig("title", "content").as_s
         published = nil
         view_count_text = nil
+        premiere_timestamp = nil
         # Contains the views of the video and the published time of the video.
         if (metadata_rows = metadata.dig("metadata", "contentMetadataViewModel", "metadataRows").try &.as_a)
           metadata_rows.each do |row|
@@ -732,8 +733,12 @@ private module Parsers
               published = metadata_parts.try &.find { |item| item["icon"]?.nil? && item.dig?("text", "content").try &.as_s.includes?("ago") }
                 .try { |item| decode_date(item.dig("text", "content").as_s) }
             end
+            if premiere_timestamp.nil?
+              premiere_timestamp = metadata_parts.try &.find { |item| item["icon"]?.nil? && item.dig?("text", "content").try &.as_s.includes?("Premieres") }
+                .try { |item| decode_date(item.dig("text", "content").as_s) }
+            end
 
-            break if !view_count_text.nil? && !published.nil?
+            break if !view_count_text.nil? && !published.nil? && !premiere_timestamp.nil?
           end
         end
 
@@ -752,7 +757,7 @@ private module Parsers
           views:              view_count,
           description_html:   "",
           length_seconds:     length_seconds || 0,
-          premiere_timestamp: Time.unix(0),
+          premiere_timestamp: premiere_timestamp,
           author_verified:    false,
           author_thumbnail:   nil,
           badges:             VideoBadges::None,