Add channel refresh

src/helpers.cr

@@ -489,11 +489,12 @@ def get_channel(id, client, db)
   if db.query_one?("SELECT EXISTS (SELECT true FROM channels WHERE id = $1)", id, as: Bool)
     channel = db.query_one("SELECT * FROM channels WHERE id = $1", id, as: InvidiousChannel)
 
-    if Time.now - channel.updated > 1.hours
-      db.exec("DELETE FROM channels * WHERE id = $1", id)
+    if Time.now - channel.updated > 1.minutes
       channel = fetch_channel(id, client)
-      args = arg_array(channel.to_a)
-      db.exec("INSERT INTO channels VALUES (#{args})", channel.to_a)
+      channel_array = channel.to_a[1..-1]
+      args = arg_array(channel_array)
+
+      db.exec("UPDATE channels SET (rss,updated,author) = (#{args}) WHERE id = '#{channel.id}'", channel_array)
     end
   else
     channel = fetch_channel(id, client)

src/invidious.cr

@@ -27,6 +27,7 @@ CONFIG = Config.from_yaml(File.read("config/config.yml"))
 
 pool_size = CONFIG.pool_size
 threads = CONFIG.threads
+channel_threads = 10
 
 Kemal.config.extra_options do |parser|
   parser.banner = "Usage: invidious [arguments]"
@@ -122,6 +123,24 @@ threads.times do
   end
 end
 
+channel_threads.times do |i|
+  spawn do
+    loop do
+      query = "SELECT id FROM channels ORDER BY updated \
+      LIMIT (SELECT count(*)/#{channel_threads} FROM channels) \
+      OFFSET (SELECT count(*)*#{i}/#{channel_threads} FROM channels)"
+      PG_DB.query(query) do |rs|
+        rs.each do
+          client = get_client(youtube_pool)
+          id = rs.read(String)
+          channel = get_channel(id, client, PG_DB)
+          youtube_pool << client
+        end
+      end
+    end
+  end
+end
+
 top_videos = [] of Video
 
 spawn do