Allow to set max playlist length via a config variable (#3283)

config/config.example.yml

@@ -453,7 +453,13 @@ feed_threads: 1
 ##
 #modified_source_code_url: ""
 
-
+##
+## Maximum custom playlist length limit.
+##
+## Accepted values: Integer
+## Default: 500
+##
+#playlist_length_limit: 500
 
 #########################################
 #
@@ -859,7 +865,7 @@ default_user_preferences:
   ## Default: false
   ##
   #automatic_instance_redirect: false
-  
+
   ##
   ## Show the entire video description by default (when set to 'false',
   ## only the first few lines of the description are shown and a

src/invidious/config.cr

@@ -131,6 +131,9 @@ class Config
   # API URL for Anti-Captcha
   property captcha_api_url : String = "https://api.anti-captcha.com"
 
+  # Playlist length limit
+  property playlist_length_limit : Int32 = 500
+
   def disabled?(option)
     case disabled = CONFIG.disable_proxy
     when Bool

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

@@ -226,8 +226,8 @@ module Invidious::Routes::API::V1::Authenticated
       return error_json(403, "Invalid user")
     end
 
-    if playlist.index.size >= 500
-      return error_json(400, "Playlist cannot have more than 500 videos")
+    if playlist.index.size >= CONFIG.playlist_length_limit
+      return error_json(400, "Playlist cannot have more than #{CONFIG.playlist_length_limit} videos")
     end
 
     video_id = env.params.json["videoId"].try &.as(String)

src/invidious/routes/playlists.cr

@@ -330,11 +330,11 @@ module Invidious::Routes::Playlists
     when "action_edit_playlist"
       # TODO: Playlist stub
     when "action_add_video"
-      if playlist.index.size >= 500
+      if playlist.index.size >= CONFIG.playlist_length_limit
         if redirect
-          return error_template(400, "Playlist cannot have more than 500 videos")
+          return error_template(400, "Playlist cannot have more than #{CONFIG.playlist_length_limit} videos")
         else
-          return error_json(400, "Playlist cannot have more than 500 videos")
+          return error_json(400, "Playlist cannot have more than #{CONFIG.playlist_length_limit} videos")
         end
       end
 

src/invidious/user/imports.cr

@@ -71,7 +71,9 @@ struct Invidious::User
           Invidious::Database::Playlists.update_description(playlist.id, description)
 
           videos = item["videos"]?.try &.as_a?.try &.each_with_index do |video_id, idx|
-            raise InfoException.new("Playlist cannot have more than 500 videos") if idx > 500
+            if idx > CONFIG.playlist_length_limit
+              raise InfoException.new("Playlist cannot have more than #{CONFIG.playlist_length_limit} videos")
+            end
 
             video_id = video_id.try &.as_s?
             next if !video_id