Code style upgrade

Handlers/MoveHandler.py

@@ -0,0 +1,63 @@
+from typing import Union
+from discord.ext.commands import Context
+from discord import Client
+from Handlers.AbstractHandler import AbstractHandler
+from Handlers.HandlerResponse import HandlerResponse
+from Config.Exceptions import BadCommandUsage, VulkanError, InvalidInput, NumberRequired, UnknownError
+from Music.Playlist import Playlist
+from Parallelism.ProcessManager import ProcessManager
+
+
+class MoveHandler(AbstractHandler):
+    def __init__(self, ctx: Context, bot: Client) -> None:
+        super().__init__(ctx, bot)
+
+    async def run(self, pos1: str, pos2: str) -> HandlerResponse:
+        processManager = ProcessManager()
+        processContext = processManager.getRunningPlayerContext(self.guild)
+        if not processContext:
+            embed = self.embeds.NOT_PLAYING()
+            error = BadCommandUsage()
+            return HandlerResponse(self.ctx, embed, error)
+
+        with processContext.getLock():
+            error = self.__validateInput(pos1, pos2)
+            if error:
+                embed = self.embeds.ERROR_EMBED(error.message)
+                return HandlerResponse(self.ctx, embed, error)
+
+            playlist = processContext.getPlaylist()
+            pos1, pos2 = self.__sanitizeInput(playlist, pos1, pos2)
+
+            if not playlist.validate_position(pos1) or not playlist.validate_position(pos2):
+                error = InvalidInput()
+                embed = self.embeds.PLAYLIST_RANGE_ERROR()
+                return HandlerResponse(self.ctx, embed, error)
+            try:
+                song = playlist.move_songs(pos1, pos2)
+
+                song_name = song.title if song.title else song.identifier
+                embed = self.embeds.SONG_MOVED(song_name, pos1, pos2)
+                return HandlerResponse(self.ctx, embed)
+            except:
+                embed = self.embeds.ERROR_MOVING()
+                error = UnknownError()
+                return HandlerResponse(self.ctx, embed, error)
+
+    def __validateInput(self, pos1: str, pos2: str) -> Union[VulkanError, None]:
+        try:
+            pos1 = int(pos1)
+            pos2 = int(pos2)
+        except:
+            return NumberRequired(self.messages.ERROR_NUMBER)
+
+    def __sanitizeInput(self, playlist: Playlist, pos1: int, pos2: int) -> tuple:
+        pos1 = int(pos1)
+        pos2 = int(pos2)
+
+        if pos1 == -1:
+            pos1 = len(playlist.getSongs())
+        if pos2 == -1:
+            pos2 = len(playlist.getSongs())
+
+        return pos1, pos2