giphyapi.js

/**
 * Created by Derek Rada on 3/10/2015.
 */

var http = require('http');
var qs = require("querystring");
var api_key = 'dc6zaTOxFJmzC'; // default beta key (need to change)
var util = require('util');


function GiphyApi(apiKey) {
    if (apiKey) {
        this.apiKey = apiKey;
    } else {
        this.apiKey = api_key;
    }
    this.site = "http://api.giphy.com/v1/gifs"
}


GiphyApi.prototype.random = function (callback) {

    var self = this;
    console.log("Inside Random");
    self.api(
        {
            uri: 'random'

        }, function (err, data) {
            var message = "An error has occurred";
            if (!err && data && data.length >= 1) {
                var url = data[0].fixed_height_downsampled_url;
                message = "<" + url + "|Random>";
            }
            callback([message]);
        }
    );
};


GiphyApi.prototype.search = function (searchStrings, callback) {

    var self = this;
    var search_str = searchStrings.join(' ');
    console.log("Searching for: " + search_str);
    self.api(
        {
            uri: 'search',
            query: {
                q: search_str
            }

        }, function (err, data) {
            if (err) {
                callback(["An error has occurred"]);
            } else {
                console.log(data);
                // Math.floor((Math.random() * 20))
                var url = "Your search for: '" + search_str + "' returned no results";
                if (util.isArray(data) && data.length > 0) {
                    try {
                        var num = Math.floor(Math.random() * (data.length - 1));
                        url = data[num].images.fixed_height_downsampled.url;
                        if (!url || url == "" || url.length == 0) {
                            url = data[num].images.fixed_height.url;
                        }
                    } catch (e) {
                        console.error(e);
                    }
                }
                callback(["<" + url + "|" + search_str + ">"]);
            }
        }
    );
};


GiphyApi.prototype.api = function (options, callback) {

    var self = this;
    console.log("Inside API");
    console.log(options);
    var url = "";
    if (!callback && !options) {
        console.log("Invalid paramaters");
        return null;
    }
    if (options.uri === null || options.uri === undefined || typeof options !== "object") {
        url = self.site + '/' + options + "?api_key=" + self.apiKey;
    } else {
        if (options.uri.charAt(0) == '/') {
            url = self.site + options.uri;
        } else {
            url = self.site + '/' + options.uri;
        }
        if (options.query) {
            options.query.api_key = self.apiKey;
            url = url + "?" + qs.stringify(options.query);
        } else {
            url = url + "?api_key=" + self.apiKey;
        }
    }
    console.log("Making HTTP Request " + url);
    var req = http.request(url, giphyRequestHandler);

    req.end();

    req.on('error', function (err) {
        console.log("Error in GiphyApi Request");
        console.error(err);
        callback(err);
    });

    function giphyRequestHandler(res) {

        var data = '';

        res.setEncoding('utf8');
        res.on('data', function (d) {
            data = data + d.toString();
        });
        res.on('end', function () {
            try {
                var giphyMessage = JSON.parse(data);
                console.log(data);
                if (giphyMessage.meta && giphyMessage.meta.status == 200) {

                    if (util.isArray(giphyMessage.data)) {
                        callback(null, giphyMessage.data);
                    } else {
                        callback(null, [giphyMessage.data])
                    }
                } else {
                    callback(new Error("Bad request"));
                }
            } catch (e) {
                console.log("Error caught trying to parse data");
                console.log(data);
                console.error(e);
                callback(err);
            }
        });
    }
};

module.exports = GiphyApi;