text: # -*- coding: utf-8 -*-
  
  """
  The MIT License (MIT)
  
  Copyright (c) 2015-2020 Rapptz
  
  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  DEALINGS IN THE SOFTWARE.
  """
  
  import discord.abc
  import discord.utils
  
  class Context(discord.abc.Messageable):
      r"""Represents the context in which a command is being invoked under.
  
      This class contains a lot of meta data to help you understand more about
      the invocation context. This class is not created manually and is instead
      passed around to commands as the first parameter.
  
      This class implements the :class:`~discord.abc.Messageable` ABC.
  
      Attributes
      -----------
      message: :class:`.Message`
          The message that triggered the command being executed.
      bot: :class:`.Bot`
          The bot that contains the command being executed.
      args: :class:`list`
          The list of transformed arguments that were passed into the command.
          If this is accessed during the :func:`on_command_error` event
          then this list could be incomplete.
      kwargs: :class:`dict`
          A dictionary of transformed arguments that were passed into the command.
          Similar to :attr:`args`\, if this is accessed in the
          :func:`on_command_error` event then this dict could be incomplete.
      prefix: :class:`str`
          The prefix that was used to invoke the command.
      command
          The command (i.e. :class:`.Command` or its subclasses) that is being
          invoked currently.
      invoked_with: :class:`str`
          The command name that triggered this invocation. Useful for finding out
          which alias called the command.
      invoked_subcommand
          The subcommand (i.e. :class:`.Command` or its subclasses) that was
          invoked. If no valid subcommand was invoked then this is equal to
          ``None``.
      subcommand_passed: Optional[:class:`str`]
          The string that was attempted to call a subcommand. This does not have
          to point to a valid registered subcommand and could just point to a
          nonsense string. If nothing was passed to attempt a call to a
          subcommand then this is set to ``None``.
      command_failed: :class:`bool`
          A boolean that indicates if the command failed to be parsed, checked,
          or invoked.
      """
  
      def __init__(self, **attrs):
          self.message = attrs.pop('message', None)
          self.bot = attrs.pop('bot', None)
          self.args = attrs.pop('args', [])
          self.kwargs = attrs.pop('kwargs', {})
          self.prefix = attrs.pop('prefix')
          self.command = attrs.pop('command', None)
          self.view = attrs.pop('view', None)
          self.invoked_with = attrs.pop('invoked_with', None)
          self.invoked_subcommand = attrs.pop('invoked_subcommand', None)
          self.subcommand_passed = attrs.pop('subcommand_passed', None)
          self.command_failed = attrs.pop('command_failed', False)
          self._state = self.message._state
  
      async def invoke(self, *args, **kwargs):
          r"""|coro|
  
          Calls a command with the arguments given.
  
          This is useful if you want to just call the callback that a
          :class:`.Command` holds internally.
  
          .. note::
  
              This does not handle converters, checks, cooldowns, pre-invoke,
              or after-invoke hooks in any matter. It calls the internal callback
              directly as-if it was a regular function.
  
              You must take care in passing the proper arguments when
              using this function.
  
          .. warning::
  
              The first parameter passed **must** be the command being invoked.
  
          Parameters
          -----------
          command: :class:`.Command`
              A command or subclass of a command that is going to be called.
          \*args
              The arguments to to use.
          \*\*kwargs
              The keyword arguments to use.
          """
  
          try:
              command = args[0]
          except IndexError:
              raise TypeError('Missing command to invoke.') from None
  
          arguments = []
          if command.cog is not None:
              arguments.append(command.cog)
  
          arguments.append(self)
          arguments.extend(args[1:])
  
          ret = await command.callback(*arguments, **kwargs)
          return ret
  
      async def reinvoke(self, *, call_hooks=False, restart=True):
          """|coro|
  
          Calls the command again.
  
          This is similar to :meth:`~.Context.invoke` except that it bypasses
          checks, cooldowns, and error handlers.
  
          .. note::
  
              If you want to bypass :exc:`.UserInputError` derived exceptions,
              it is recommended to use the regular :meth:`~.Context.invoke`
              as it will work more naturally. After all, this will end up
              using the old arguments the user has used and will thus just
              fail again.
  
          Parameters
          ------------
          call_hooks: :class:`bool`
              Whether to call the before and after invoke hooks.
          restart: :class:`bool`
              Whether to start the call chain from the very beginning
              or where we left off (i.e. the command that caused the error).
              The default is to start where we left off.
          """
          cmd = self.command
          view = self.view
          if cmd is None:
              raise ValueError('This context is not valid.')
  
          # some state to revert to when we're done
          index, previous = view.index, view.previous
          invoked_with = self.invoked_with
          invoked_subcommand = self.invoked_subcommand
          subcommand_passed = self.subcommand_passed
  
          if restart:
              to_call = cmd.root_parent or cmd
              view.index = len(self.prefix)
              view.previous = 0
              view.get_word() # advance to get the root command
          else:
              to_call = cmd
  
          try:
              await to_call.reinvoke(self, call_hooks=call_hooks)
          finally:
              self.command = cmd
              view.index = index
              view.previous = previous
              self.invoked_with = invoked_with
              self.invoked_subcommand = invoked_subcommand
              self.subcommand_passed = subcommand_passed
  
      @property
      def valid(self):
          """Checks if the invocation context is valid to be invoked with."""
          return self.prefix is not None and self.command is not None
  
      async def _get_channel(self):
          return self.channel
  
      @property
      def cog(self):
          """Returns the cog associated with this context's command. None if it does not exist."""
  
          if self.command is None:
              return None
          return self.command.cog
  
      @discord.utils.cached_property
      def guild(self):
          """Returns the guild associated with this context's command. None if not available."""
          return self.message.guild
  
      @discord.utils.cached_property
      def channel(self):
          """Returns the channel associated with this context's command. Shorthand for :attr:`.Message.channel`."""
          return self.message.channel
  
      @discord.utils.cached_property
      def author(self):
          """Returns the author associated with this context's command. Shorthand for :attr:`.Message.author`"""
          return self.message.author
  
      @discord.utils.cached_property
      def me(self):
          """Similar to :attr:`.Guild.me` except it may return the :class:`.ClientUser` in private message contexts."""
          return self.guild.me if self.guild is not None else self.bot.user
  
      @property
      def voice_client(self):
          r"""Optional[:class:`.VoiceClient`]: A shortcut to :attr:`.Guild.voice_client`\, if applicable."""
          g = self.guild
          return g.voice_client if g else None
  
      async def send_help(self, *args):
          """send_help(entity=<bot>)
  
          |coro|
  
          Shows the help command for the specified entity if given.
          The entity can be a command or a cog.
  
          If no entity is given, then it'll show help for the
          entire bot.
  
          If the entity is a string, then it looks up whether it's a
          :class:`Cog` or a :class:`Command`.
  
          .. note::
  
              Due to the way this function works, instead of returning
              something similar to :meth:`~.commands.HelpCommand.command_not_found`
              this returns :class:`None` on bad input or no help command.
  
          Parameters
          ------------
          entity: Optional[Union[:class:`Command`, :class:`Cog`, :class:`str`]]
              The entity to show help for.
  
          Returns
          --------
          Any
              The result of the help command, if any.
          """
          from .core import Group, Command, wrap_callback
          from .errors import CommandError
  
          bot = self.bot
          cmd = bot.help_command
  
          if cmd is None:
              return None
  
          cmd = cmd.copy()
          cmd.context = self
          if len(args) == 0:
              await cmd.prepare_help_command(self, None)
              mapping = cmd.get_bot_mapping()
              injected = wrap_callback(cmd.send_bot_help)
              try:
                  return await injected(mapping)
              except CommandError as e:
                  await cmd.on_help_command_error(self, e)
                  return None
  
          entity = args[0]
          if entity is None:
              return None
  
          if isinstance(entity, str):
              entity = bot.get_cog(entity) or bot.get_command(entity)
  
          try:
              qualified_name = entity.qualified_name
          except AttributeError:
              # if we're here then it's not a cog, group, or command.
              return None
  
          await cmd.prepare_help_command(self, entity.qualified_name)
  
          try:
              if hasattr(entity, '__cog_commands__'):
                  injected = wrap_callback(cmd.send_cog_help)
                  return await injected(entity)
              elif isinstance(entity, Group):
                  injected = wrap_callback(cmd.send_group_help)
                  return await injected(entity)
              elif isinstance(entity, Command):
                  injected = wrap_callback(cmd.send_command_help)
                  return await injected(entity)
              else:
                  return None
          except CommandError as e:
              await cmd.on_help_command_error(self, e)
  