vinsbot/index.js

facebook chatbot

var request = require('request'),
    config = require('./config/config');
 
class Bot {
    constructor (page_token){
        this.page_token = page_token
    }

    // get user profile
    getUserProfile(userId) {
        var url = config.get_profile(userId, this.page_token);
        return new Promise((resolve, reject) => {
            request(url, function (error, response, body) {
                resolve(JSON.parse(body))
            });
        })
        
    }

    // Sends response messages via the Send API
    sendMessage (sender_psid, response) {
        // Construct the message body
        let request_body = {
            recipient: {
                id: sender_psid
            },
            message: response
        }

        // Send the HTTP request to the Messenger Platform
        request({
            uri: config.uri,
            qs: { 
                access_token: this.page_token
            },
            method: "POST",
            json: request_body
        }, (err, res, body) => {
            if (!err) {
                console.log('message sent!')
            } else {
                console.error("Unable to send message:" + err);
            }
        });
    }

    // Calls the Facebook graph api to change various bot settings
    addMenu(menu){
        // Start the request
        request({
            url: config.add_menu(this.page_token),
            method: 'POST',
            headers: {'Content-Type': 'application/json'},
            form: menu
        },
        function (error, response, body) {
            if (!error && response.statusCode == 200) {
                console.log(body);
            } else { 
                // TODO: Handle errors
                console.log("cant add menu.");
                console.log(body);
            }
        });
    }

    // get started
    facebookWelcome(form){
        request({
            url: config.welcome(this.page_token),
            method: 'POST',
            headers: {'Content-Type': 'application/json'},
            form: form
        },
        function (error, response, body) {
            if (!error && response.statusCode == 200) {
                // Print out the response body
                console.log(body);
            } else { 
                // TODO: Handle errors
                console.log("failed.");
            }
        });
    }

    deleteMenu(form){
        var self =  this;
        request({
            url: config.del_menu(this.page_token),
            method: 'DELETE',
            headers: {'Content-Type': 'application/json'},
            form: form
        },
        function (error, response, body) {
            if (!error && response.statusCode == 200) {
                // Print out the response body
                console.log(body);
            } else { 
                // TODO: Handle errors
                console.log("cant delete menu.");
                console.log(body)
            }
        });
    }
}

module.exports = Bot