Adding volume change command, pre-release

Handlers/VolumeHandler.py

@@ -0,0 +1,62 @@
+from Config.Exceptions import BadCommandUsage, NumberRequired, VulkanError
+from Parallelism.AbstractProcessManager import AbstractPlayersManager
+from Parallelism.Commands import VCommands, VCommandsType
+from Handlers.AbstractHandler import AbstractHandler
+from Handlers.HandlerResponse import HandlerResponse
+from discord.ext.commands import Context
+from Music.VulkanBot import VulkanBot
+from discord import Interaction
+from typing import Union
+
+
+class VolumeHandler(AbstractHandler):
+    def __init__(self, ctx: Union[Context, Interaction], bot: VulkanBot) -> None:
+        super().__init__(ctx, bot)
+
+    async def run(self, args: str) -> HandlerResponse:
+        if args is None or args.strip() == '':
+            error = BadCommandUsage()
+            return HandlerResponse(self.ctx, embed, error)
+
+        error = self.__validateInput(args)
+        if error:
+            embed = self.embeds.ERROR_EMBED(error.message)
+            return HandlerResponse(self.ctx, embed, error)
+
+        playersManager: AbstractPlayersManager = self.config.getPlayersManager()
+        if not playersManager.verifyIfPlayerExists(self.guild):
+            embed = self.embeds.NOT_PLAYING()
+            error = BadCommandUsage()
+            return HandlerResponse(self.ctx, embed, error)
+
+        playerLock = playersManager.getPlayerLock(self.guild)
+        acquired = playerLock.acquire(timeout=self.config.ACQUIRE_LOCK_TIMEOUT)
+        volume = self.__convert_input_to_volume(args)        
+        if acquired:
+            volumeCommand = VCommands(VCommandsType.VOLUME, volume)
+            await playersManager.sendCommandToPlayer(volumeCommand, self.guild, self.ctx)
+            
+            playerLock.release()
+            
+            embed = self.embeds.VOLUME_CHANGED(volume)
+            return HandlerResponse(self.ctx, embed)
+        else:
+            playersManager.resetPlayer(self.guild, self.ctx)
+            
+            embed = self.embeds.PLAYER_RESTARTED()
+            return HandlerResponse(self.ctx, embed)
+
+    def __convert_input_to_volume(self, input_volume: str) -> float:
+        volume = float(input_volume)
+        if volume < 0:
+            volume = 0
+        if volume > 100:
+            volume = 100
+        
+        return volume
+
+    def __validateInput(self, volume: str) -> Union[VulkanError, None]:
+        try:
+            _ = float(volume)
+        except:
+            return NumberRequired(self.messages.ERROR_VOLUME_NUMBER)