Outgoing Middleware

suggestion_chips.js

const _ = require('lodash')

/**
 * This outgoing middleware will find the $"..." pattern in the ougoing text
 * And transform those into suggestion chips in channel-web
 * @example e.g.
 * `What type of restaurant are you looking for? $“Asian” $”Mexican” $”American”`
 */

const regex = /\$(“|'|"|”)([\w\s]+)(“|'|"|”)/g

if (event.payload && typeof event.payload.text === 'string') {
  const suggestions = []
  event.payload.text = event.payload.text.replace(regex, function(match, g1, g2) {
    suggestions.push(g2)
    return ''
  })

  if (suggestions.length) {
    event.payload = {
      type: 'custom',
      module: 'channel-web',
      component: 'QuickReplies',
      quick_replies: suggestions.map(x => ({ title: x, payload: x })),
      wrapped: {
        type: 'text',
        ..._.omit(event.payload, 'quick_replies')
      }
    }
    event.type = 'custom'
  }
}