Connects Ballerina to Google Dialogflow API

Ballerina Connector for Google Dialogflow API

• Access your customized chatbot model of Dialogflow directly from Ballerina

Compatibility

Sample

First, import ramesha/module_dialogflow

Instantiate the connector by giving authentication details in the HTTP client config, which has built-in support for OAuth 2.0. This uses OAuth 2.0 to authenticate and authorize requests. The connector can be minimally instantiated in the HTTP client config using the access token.

Obtaining Access Tokens

1. Visit Dialogflow API Console,and sign in with your google account. For further details visit Dialogflow documentation
2. Create an agent for your chatbot.
3. Create intents of your chatbot and give training phrases. Visit Quick start for clarifications.
4. Go to Settings and select the API version as V1.
5. Copy the client access token from the Settings page.

You can now enter the credentials in the HTTP client config.

module_dialogflow: DialogflowConfig dialogflowConfig = {
    clientConfig:{
        auth:{
            scheme: http:OAUTH2,
            accessToken: config:getAsString("ACCESS_TOKEN")
        }
    }
};
module_dialogflow: Client dialogflowClient = new(dialogflowConfig);

Example 1

import ballerina/http;
import ballerina/io;
import ballerina/config;
import ramesha/module_dialogflow;
public function main(){
    module_dialogflow: DialogflowConfig dialogflowConfig = {
        clientConfig:{
            auth:{
                scheme: http:OAUTH2,
                accessToken: config:getAsString("ACCESS_TOKEN")
            }
        }
    };
    callb(dialogflowConfig);
}
function callb(module_dialogflow: DialogflowConfig dialogflowConfig){
    module_dialogflow: Client dialogflowClient = new(dialogflowConfig);
    string query11= "What are the main products of WSO2";
    var res= dialogflowClient->getResponse(query11);
    io:println(res);
}

Output:

    Main products are APIM, IAM and EI

Example 2: Json response

import ballerina/http;
import ballerina/io;
import ballerina/config;
import ramesha/module_dialogflow;
public function main(){
    module_dialogflow: DialogflowConfig dialogflowConfig = {
        clientConfig:{
            auth:{
                scheme: http:OAUTH2,
                accessToken: config:getAsString("ACCESS_TOKEN")
            }
        }
    };
    callb(dialogflowConfig);
}
function callb(module_dialogflow: DialogflowConfig dialogflowConfig){
    module_dialogflow: Client dialogflowClient = new(dialogflowConfig);
    string query11= "What are the main products of WSO2";
    var res= dialogflowClient->getJsonResponse(query11);
    io:println(res);
}

Output:

{
    "id":"4a788f57-7e48-4ad3-acf3-21e27a054044",
    "timestamp":"2019-02-12T10:07:19.217Z",
    "lang":"en",
    "result":{
        "source":"agent",
        "resolvedQuery":"What are the main products of WSO2",
        "action":"",
        "actionIncomplete":false,
        "parameters":{},
        "contexts":[],
        "metadata":{
            "intentId":"3931b5b1-941d-403f-a4ec-ee814e1914e9",
            "webhookUsed":"false",
            "webhookForSlotFillingUsed":"false",
            "isFallbackIntent":"false",
            "intentName":"products"
         },
        "fulfillment":{
            "speech":"Main products are APIM, IAM and EI",
            "messages":[{"type":0, "speech":"Main products are APIM, IAM and EI"}]
        },
        "score":1.0
    },
    "status":{
        "code":200,
        "errorType":"success"
    },
    "sessionId":"12345"
}