prisme-flow/nodes/bridge/bot/bot-conversation.js

prisme platform flow engine

/**
 * Created by prisme.io on 09/06/2017.
 */

var _ = require('underscore')
var ChatContextStore = require('./lib/chat-context-store')

module.exports = function (RED) {
  function BotConversation (config) {
    RED.nodes.createNode(this, config)
    var node = this

    this.chatId = config.chatId
    this.transport = config.transport
    this.contextMessageId = config.contextMessageId
    this.messageId = config.messageId

    this.on('input', function (msg) {
      // evaluate chat id
      var chatId = null
      if (!_.isEmpty(node.chatId)) {
        chatId = node.chatId
      } else if (msg.payload != null && msg.payload.chatId != null) {
        chatId = msg.payload.chatId
      }
      // evaluate platform transport
      var transport = null
      if (!_.isEmpty(node.transport)) {
        transport = node.transport
      } else if (msg.payload != null && msg.payload.transport != null) {
        transport = msg.payload.transport
      }
      // get the chat context
      var chatContext = ChatContextStore.getOrCreateChatContext(node, chatId, {
        chatId: chatId,
        transport: transport
      })
      // evaluate message if
      var messageId = null
      if (!_.isEmpty(node.messageId)) {
        messageId = node.messageId
      } else if (msg.payload != null && msg.payload.messageId != null) {
        messageId = msg.payload.messageId
      } else if (this.contextMessageId && chatContext.get('messageId') != null) {
        messageId = chatContext.get('messageId')
      }
      // ensure the original message is injected
      msg.originalMessage = {
        chat: {
          id: chatId
        },
        message_id: null,
        modify_message_id: messageId,
        transport: transport
      }

      msg.chat = function () {
        return ChatContextStore.getOrCreateChatContext(node, chatId, {
          chatId: chatId,
          transport: transport,
          authorized: true
        })
      }

      // fix chat id in payload if any
      if (_.isObject(msg.payload) && msg.payload.chatId != null) {
        msg.payload.chatId = chatId
      }

      node.send(msg)
    })
  }

  RED.nodes.registerType('bot-conversation', BotConversation)
}