gifsuggest.js

gifsuggest.js

    `use strict`;
    var express = require('express'),
        async = require('async'),
        lodash = require('lodash'),
        bodyParser = require('body-parser'),
        awsServerless  =require('aws-serverless-express/middleware'),
        request = require('request-promise');
    var app = express();
    app.listen(3000,()=>{
      console.log('listening on 3000') //Not required but useful when you want to debug locally.
    });
    app.use(bodyParser.urlencoded({extended: true})); //Since Slack sends all its data as x-www-form-urlencoded
    app.use(awsServerless.eventContext()); //Binding the express lifecycle to the aws lambda lifecycle.
    var options = {
        method:'GET',
        url: 'http://api.giphy.com/v1/gifs/search',
        qs: { api_key: 'dc6zaTOxFJmzC', limit: 15 } //This is the public api key provided by giphy to everyone.
    };
    app.post('/gifs',(req,res) => {
        console.log(req.body);
        options.qs.q = req.body.text;
        fetchgifs(req.body.response_url, res);
    });
    var fetchgifs = function(url, res){
        return request(options,(err, response, body)=>{
            if(err) throw new Error(error);
            var data = lodash.dropRight(lodash.chain(JSON.parse(body).data)
                .map(x => x.images.downsized.url)
                .shuffle()
                .value(),10); //Randomly chooses 10/15 images from the response.
            delayed(data,url, res);
        });
    };
    var delayed = function (gifs,url, res) {
        var body = {
            "text":"suggested gifs for "+options.qs.q,
            "attachments": lodash.map(gifs,(d)=>{
                return {"image_url":d}
            }),
        };
        request({
            method:'POST',
            url:url,
            body: JSON.stringify(body),
            },(err, res, body)=>{
            console.log(body);
        }).then(()=>{
          console.log('*****sending response *******');
          res.send({"text":"Looking for gifs about "+options.qs.q});
        });
        };
    module.exports = app;