重构的WechatLog

class WechatLog < ActiveRecord::Base
  has_many :wechats
  belongs_to :wechat_platform
  has_many :img_text_messages

  def self.add_wechat_text_message(options = {})
    keyword = WechatPlatformKeyword.find_by(name: options[:content])
    trigger_type = keyword.present? ? ‘keyword‘ : ‘leave_message‘
    create(origin: ‘wechat‘,
           content: options[:content],
           wechat_id: options[:wechat_id],
           message_type: ‘text‘,
           trigger_type: trigger_type,
           wechat_platform_id: options[:wechat_platform_id]
    )
  end
　...(好几个) 　  

end

options = { wechat_id: @wechat.id, wechat_platform_id: @wechat_platform_id, content: @xml[:Content] }

　WechatLog.add_platform_text_message(options.merge(reply: keyword.message)

class WechatLog < ActiveRecord::Base
  has_many :wechats
  belongs_to :wechat_platform
  has_many :img_text_messages

  def self.add(wechat)
    new(wechat_id: wechat.id, wechat_platform_id: wechat.wechat_platform_id)
  end

  def from(origin)
    self.origin = origin.to_s
    self
  end

  def as(label)
    self.trigger_type = label.to_s
    self
  end

  def save_text(text)
    return if text.blank?
    self.message_type = ‘text‘
    self.content = text
    save
  end

  def save_event(options = {})
    self.message_type = ‘event‘
    self.event = options[:event]
    self.event_key = options[:event_key]
    save
  end

  def save_reply(message)
    case message.class.name
    when ‘TextMessage‘
      save_text(message.content)
    end
  end
end

WechatLog.add(@wechat).from(:platform).save_reply(message)

或者

　WechatLog.add(@wechat).from(:wechat)
           .as(:keyword)
           .save_text(@xml[:Content])