Code style upgrade

Handlers/QueueHandler.py

@@ -0,0 +1,56 @@
+import asyncio
+from discord.ext.commands import Context
+from discord import Client
+from Handlers.AbstractHandler import AbstractHandler
+from Handlers.HandlerResponse import HandlerResponse
+from Music.Downloader import Downloader
+from Utils.Utils import Utils
+from Parallelism.ProcessManager import ProcessManager
+
+
+class QueueHandler(AbstractHandler):
+    def __init__(self, ctx: Context, bot: Client) -> None:
+        super().__init__(ctx, bot)
+        self.__down = Downloader()
+
+    async def run(self) -> HandlerResponse:
+        # Retrieve the process of the guild
+        process = ProcessManager()
+        processContext = process.getRunningPlayerContext(self.guild)
+        if not processContext:  # If no process return empty list
+            embed = self.embeds.EMPTY_QUEUE()
+            return HandlerResponse(self.ctx, embed)
+
+        # Acquire the Lock to manipulate the playlist
+        with processContext.getLock():
+            playlist = processContext.getPlaylist()
+
+            if playlist.isLoopingOne():
+                song = playlist.getCurrentSong()
+                embed = self.embeds.ONE_SONG_LOOPING(song.info)
+                return HandlerResponse(self.ctx, embed)
+
+            songs_preload = playlist.getSongsToPreload()
+            if len(songs_preload) == 0:
+                embed = self.embeds.EMPTY_QUEUE()
+                return HandlerResponse(self.ctx, embed)
+
+            asyncio.create_task(self.__down.preload(songs_preload))
+
+            if playlist.isLoopingAll():
+                title = self.messages.ALL_SONGS_LOOPING
+            else:
+                title = self.messages.QUEUE_TITLE
+
+            total_time = Utils.format_time(sum([int(song.duration if song.duration else 0)
+                                                for song in songs_preload]))
+            total_songs = len(playlist.getSongs())
+
+            text = f'📜 Queue length: {total_songs} | ⌛ Duration: `{total_time}` downloaded  \n\n'
+
+            for pos, song in enumerate(songs_preload, start=1):
+                song_name = song.title if song.title else self.messages.SONG_DOWNLOADING
+                text += f"**`{pos}` - ** {song_name} - `{Utils.format_time(song.duration)}`\n"
+
+            embed = self.embeds.QUEUE(title, text)
+            return HandlerResponse(self.ctx, embed)