calculation - DialogFlow CX 计算值

Question

我从用户输入中收集数据，最后我想根据该输入计算一个值。

例如，我收集人的体重，然后收集身高来计算人的 BMI，General Flow。如何在最后一步计算 BMI 并将结果显示给用户？

score 3 · Accepted Answer

除了 jess 的帖子之外，您还可以尝试另一种方法来根据用户的输入计算 BMI。以下是与提供的第一种方法的区别：

复合自定义实体

这将允许您创建实体，您可以在其中轻松提取用户提供的数字，而不是获取字符串并将此字符串转换为 webhook 中的数字。有了这些实体，就不必列出身高和体重的所有其他选项。
表单参数

您可以在页面中添加参数，而不是在添加参数的意图中定义参数，在该页面中，代理可以与最终用户进行多次交互，直到参数得到满足。

这是实现这些功能的分步过程。

创建复合自定义实体，以便从页面的最终用户那里收集表单参数。您可以按如下方式设计自定义实体：

一个。为身高和体重单位名称创建自定义实体。

湾。然后，创建复合自定义实体，其中包含每个实体的编号和单位名称。请注意，您应该添加一个别名以确保将单独返回这些值。
创建将用于触发流程开始的意图。请注意为最终用户可能键入或说出的内容添加足够的训练短语。
创建一个页面，您可以在触发 Intent.BMI 意图时从默认起始页面转换。此页面还将用于收集可用于计算 BMI 的表单参数。
通过为 Intent.BMI 意图添加一个意图路由来创建流，其中转换是 BMI 页面。流程看起来像这样。
现在，进入 BMI 页面并相应地添加表单参数。确保根据需要设置这些参数。还可以添加条件路由，一旦满足参数，您就可以从 webhook 返回响应。

一个。BMI 页面可能如下所示。

湾。对于参数，这里是一个关于如何添加这些参数的示例。

C。对于条件路由，我添加了一个条件以在满足表单参数后返回响应。如果尚未完成，代理将继续提示用户输入有效输入。我使用了一个 webhook 来返回响应，其中这个 webhook 提取了每个参数的值并能够计算 BMI。
在您的webhook中，创建一个函数，该函数将提取表单参数并根据这些值计算 BMI。这是另一个使用 Node.js 的示例。

index.js

'use strict';

const express = require('express');
const bodyParser = require('body-parser');
const app = express();

var port = process.env.PORT || 8080;

app.use(
    bodyParser.urlencoded({
      extended: true
    })
);
  
app.use(bodyParser.json());

app.post('/BMI', (req, res) => processWebhook4(req, res));

var processWebhook4 = function(request, response ){

    const params = request.body.sessionInfo.parameters;
    
    var heightnumber = params["height.number"];
    var weightnumber = params["weight.number"];
    var heightunit = params["height.unit-height"]
    var weightunit = params["weight.unit-weight"]
    var computedBMI;

    if (heightunit == "cm" && weightunit == "kg") { //using metric units
        computedBMI = ((weightnumber/heightnumber/heightnumber )) * 10000;
    } else if (heightunit == "in" && weightunit == "lb") { //using standard metrics
        computedBMI = ((weightnumber/heightnumber/heightnumber )) * 703;
    }

    const replyBMI = {
        'fulfillmentResponse': {
            'messages': [
                {
                    'text': {
                        'text': [
                            'This is a response from webhook! BMI is ' + computedBMI
                        ]
                    }
                }
            ]
        }
    }
    response.send(replyBMI);
}

app.listen(port, function() {
    console.log('Our app is running on http://localhost:' + port);
});

包.json

{
   "name": "cx-test-functions",
   "version": "0.0.1",
   "author": "Google Inc.",
   "main": "index.js",
   "engines": {
       "node": "8.9.4"
   },
   "scripts": {
       "start": "node index.js"
   },
   "dependencies": {
       "body-parser": "^1.18.2",
       "express": "^4.16.2"
   }
}

这是结果。

score 1 · Accepted Answer

In order to calculate the values of the input you collected from the bot, you will need to set-up a code using a webhook to calculate the BMI and connect the Webhook URL in the Dialogflow CX Console. Here’s a simple flow you can try:

First, create composite custom entities which can be used to match values in the training phrases in an intent, for example, weight and height. https://cloud.google.com/dialogflow/cx/docs/concept/entity#custom.

Then create an intent with training phrases that match the values with the entities you created.

There are two ways to set the parameter values: Intent parameters and Form parameters. In my example, I used Intent parameters to get the parameter values that are stored when you query the flow of the conversation from the “Test Agent” section:

Then prepare your code in the webhook to process the values to calculate the BMI: https://cloud.google.com/dialogflow/cx/docs/concept/webhook. Here’s a sample code using NodeJS:

index.js

const express = require('express') // will use this later to send requests 
const http = require('http') // import env variables 
require('dotenv').config()
const app = express();
const port = process.env.PORT || 3000

/// Google Sheet 
const fs = require('fs');
const readline = require('readline');

app.use(express.json())
app.use(express.urlencoded({ extended: true }))
app.get('/', (req, res) => { res.status(200).send('Server is working.') })
app.listen(port, () => { console.log(` Server is running at http://localhost:${port}`) })

app.post('/bmi', (request, response) => {
    let params = request.body.sessionInfo.parameters;
    let height = getNumbers(params.height); // 170 cm from the example
    let weight = getNumbers(params.weight); // 60 kg from the example

    let bmi = (weight/(height/100*height/100));

    let fulfillmentResponse = {
        "fulfillmentResponse": {
            "messages": [{
                "text": {
                    "text": [
                        bmi 
                    ]
                }
            }]
        }
    };
    response.json(fulfillmentResponse);
});

// Extract number from string
function getNumbers(string) {
  string = string.split(" ");
  var int = ""; 
  for(var i=0;i<string.length;i++){
    if(isNaN(string[i])==false){
    int+=string[i];
    }
  }
 return parseInt(int);
}

package.json

{
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node index.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "dotenv": "^8.2.0",
    "express": "^4.17.1"
  }
}

Deploy your webhook
Add the webhook URL in the Dialogflow CX Console

Use the webhook in Dialogflow CX Page wherein you will need to set the response for BMI output:

Here's the result:

calculation - DialogFlow CX 计算值

2 回答 2

Related

Reference