real world fixes

main.rb

@@ -1,13 +1,34 @@
 require 'discordrb'
+require 'video_info'
 require 'uri'
 require 'optparse'
 require 'shellwords'
 
-def parse_songs_from_string(mpd,message)
+def sanity_check_video(url)
+  if !url.include?("youtube")
+    return false
+  end
+  video = VideoInfo.new(url)
+  title = video.title
+  title.slice! " - YouTube Music"
+  if video.duration > 1200
+    puts "skipping #{url} since it's over 20 minutes"
+    return false
+  elsif File.exists?("tracks/#{title}.mp3") || File.exists?("spool/#{title}.mp3") 
+    puts "#{url} already downloaded, not downloading again"
+    return false
+  end
+  return true
+end
+
+
+
+def parse_songs_from_string(message)
   urls = URI.extract(message)
   if urls.length != 0
     puts "Found #{urls}; downloading"
     urls.each do |url|
+      if sanity_check_video(url)
         res = `youtube-dl --ignore-errors --output \"spool/%(title)s.%(ext)s\" --extract-audio --audio-format mp3 #{url}`
         if res 
           puts "Downloaded #{url}"
@@ -15,9 +36,17 @@ def parse_songs_from_string(mpd,message)
           puts "error downloading #{url}"
         end
       end
-    if mpd
+    end
-      puts "telling mpd to refresh"
+  end
+  nil
+end
+
+def update_mpd()
       new_songs = Dir["spool/*.mp3"]
+      if new_songs.length <= 0
+	      return true
+      end
+      puts "telling mpd to refresh"
       system("mv spool/*.mp3 tracks/")
       system("mpc update")
       new_songs.each do |song|
@@ -29,9 +58,6 @@ def parse_songs_from_string(mpd,message)
           puts "error adding #{s} to mpd"
         end
       end
-    end
-  end
-  nil
 end
 
 options = {}
@@ -49,7 +75,6 @@ puts "creating spool and tracks directories"
 system("mkdir -p spool")
 system("mkdir -p tracks")
 
-mpd = false
 if File.exists?("/usr/bin/mpd")
   if !File.exists?("/usr/bin/mpc")
     puts "Bailing since mpd exists but not mpc (which is needed to control mpd)"
@@ -59,8 +84,8 @@ if File.exists?("/usr/bin/mpd")
   system("systemctl start mpd") unless `ps aux | grep mpd` != ""
   system("mpc clear")
   system("mpc add /")
+  system("mpc shuffle")
   system("mpc repeat")
-  mpd = true
 end
 
 bot = Discordrb::Commands::CommandBot.new token: options[:bot_token], prefix: '!radio '
@@ -81,6 +106,7 @@ bot.command :reload do |event|
   system("mpc clear")
   system("mpc update")
   system("mpc add /")
+  event.respond("queue reloaded")
   nil
 end
 
@@ -96,19 +122,27 @@ bot.command :skip do |event|
   nil
 end
 
+bot.command :shuffle do |event|
+  system("mpc shuffle")
+  event.respond("shuffled queue")
+  nil
+end
+
 bot.command :initialize do |event|
   event.respond("loading last 50 messages from channel")
   channel  = bot.channel(options[:channel_id])
   messages = channel.history(50)
   messages.each do |msg|
-    parse_songs_from_string(mpd,msg.content)
+    parse_songs_from_string(msg.content)
   end
+  update_mpd()
   event.respond("done loading")
 end
 
 
 bot.message(in: options[:channel_id],contains: "youtube.com") do |event|
-  parse_songs_from_string(mpd,event.content)
+  parse_songs_from_string(event.content)
+  update_mpd()
 end
 
 bot.run