module Slack::Web::Api::Mixins::Channels

def channels_id(options = {})
  name = options[:channel]
  throw ArgumentError.new('Required arguments :channel missing') if name.nil?
  return { 'ok' => true, 'channel' => { 'id' => name } } unless name[0] == '#'
  channels_list.tap do |list|
    list.channels.each do |channel|
      return Slack::Messages::Message.new('ok' => true, 'channel' => { 'id' => channel.id }) if channel.name == name[1..-1]
    end
  end
  fail Slack::Web::Api::Error, 'channel_not_found'
end