Refactor_dialogflow_example.js

exports.dialogflowFirebaseFulfillment = functions.https.onRequest((request, response) => {
  const agent = new WebhookClient({ request, response });
  console.log('Dialogflow Request headers: ' + JSON.stringify(request.headers));
  console.log('Dialogflow Request body: ' + JSON.stringify(request.body));
 
  function welcome(agent) {
    agent.add(`Welcome to my agent!`);
  }
 
  function fallback(agent) {
    agent.add(`I didn't understand`);
    agent.add(`I'm sorry, can you try again?`);
  }
  
  function productList(agent){
    var productListPayload = {
      "type": "flex",
      "altText": "Our Products list",
      "contents": {
        "type": "carousel",
        "contents": [
          {
            "type": "bubble",
            "hero": {
              "type": "image",
              "size": "full",
              "aspectRatio": "20:13",
              "aspectMode": "cover",
              "url": "https://scdn.line-apps.com/n/channel_devcenter/img/fx/01_5_carousel.png"
            },
            "body": {
              "type": "box",
              "layout": "vertical",
              "spacing": "sm",
              "contents": [
                {
                  "type": "text",
                  "text": "Arm Chair, White",
                  "wrap": true,
                  "weight": "bold",
                  "size": "xl"
                },
                {
                  "type": "box",
                  "layout": "baseline",
                  "contents": [
                    {
                      "type": "text",
                      "text": "$49",
                      "wrap": true,
                      "weight": "bold",
                      "size": "xl",
                      "flex": 0
                    },
                    {
                      "type": "text",
                      "text": ".99",
                      "wrap": true,
                      "weight": "bold",
                      "size": "sm",
                      "flex": 0
                    }
                  ]
                }
              ]
            },
            "footer": {
              "type": "box",
              "layout": "vertical",
              "spacing": "sm",
              "contents": [
                {
                  "type": "button",
                  "style": "primary",
                  "action": {
                    "type": "uri",
                    "label": "Add to Cart",
                    "uri": "https://linecorp.com"
                  }
                },
                {
                  "type": "button",
                  "action": {
                    "type": "uri",
                    "label": "Add to wishlist",
                    "uri": "https://linecorp.com"
                  }
                }
              ]
            }
          },
          {
            "type": "bubble",
            "hero": {
              "type": "image",
              "size": "full",
              "aspectRatio": "20:13",
              "aspectMode": "cover",
              "url": "https://scdn.line-apps.com/n/channel_devcenter/img/fx/01_6_carousel.png"
            },
            "body": {
              "type": "box",
              "layout": "vertical",
              "spacing": "sm",
              "contents": [
                {
                  "type": "text",
                  "text": "Metal Desk Lamp",
                  "wrap": true,
                  "weight": "bold",
                  "size": "xl"
                },
                {
                  "type": "box",
                  "layout": "baseline",
                  "flex": 1,
                  "contents": [
                    {
                      "type": "text",
                      "text": "$11",
                      "wrap": true,
                      "weight": "bold",
                      "size": "xl",
                      "flex": 0
                    },
                    {
                      "type": "text",
                      "text": ".99",
                      "wrap": true,
                      "weight": "bold",
                      "size": "sm",
                      "flex": 0
                    }
                  ]
                },
                {
                  "type": "text",
                  "text": "Temporarily out of stock",
                  "wrap": true,
                  "size": "xxs",
                  "margin": "md",
                  "color": "#ff5551",
                  "flex": 0
                }
              ]
            },
            "footer": {
              "type": "box",
              "layout": "vertical",
              "spacing": "sm",
              "contents": [
                {
                  "type": "button",
                  "flex": 2,
                  "style": "primary",
                  "color": "#aaaaaa",
                  "action": {
                    "type": "uri",
                    "label": "Add to Cart",
                    "uri": "https://linecorp.com"
                  }
                },
                {
                  "type": "button",
                  "action": {
                    "type": "uri",
                    "label": "Add to wish list",
                    "uri": "https://linecorp.com"
                  }
                }
              ]
            }
          },
          {
            "type": "bubble",
            "body": {
              "type": "box",
              "layout": "vertical",
              "spacing": "sm",
              "contents": [
                {
                  "type": "button",
                  "flex": 1,
                  "gravity": "center",
                  "action": {
                    "type": "uri",
                    "label": "See more",
                    "uri": "https://linecorp.com"
                  }
                }
              ]
            }
          }
        ]
      }
    }
    var payload = new Payload("LINE", )
  
  }
 
  let intentMap = new Map();
  intentMap.set('Default Welcome Intent', welcome);
  intentMap.set('Default Fallback Intent', fallback);
  intentMap.set('Product', productList);
  agent.handleRequest(intentMap);
});