gistfile1.txt

var fs = require('fs');
var rest = require('restler');
var program = require('commander');
var cheerio = require('cheerio');
var HTMLFILE_DEFAULT = "index.html";
var CHECKSFILE_DEFAULT = "checks.json";
var URL_DEFAULT = "http://floating-waters-9907.herokuapp.com/";

var assertFileExists = function(infile) {
    var instr = infile.toString();
    if(!fs.existsSync(instr)) {
        console.log("%s does not exist. Exiting.", instr);
        process.exit(1); // http://nodejs.org/api/process.html#process_process_exit_code
    }
    return instr;
};

var cheerioHtmlFile = function(htmlfile) {
    return cheerio.load(fs.readFileSync(htmlfile));
};

var loadUsingCheerio = function(result){
    return cheerio.load(result);
}

var cheerioURLContent = function(url, callback) {
    rest.get(url).on("complete", function(result){
        console.log(result);
        return callback(result);
    });
}

var loadChecks = function(checksfile) {
    return JSON.parse(fs.readFileSync(checksfile));
};

var checkHtmlFile = function(htmlfile, checksfile) {
    $ = cheerioHtmlFile(htmlfile);
    var checks = loadChecks(checksfile).sort();
    var out = {};
    for(var ii in checks) {
        var present = $(checks[ii]).length > 0;
        out[checks[ii]] = present;
    }
    return out;
};

var checkContentFromURL = function(contentFromUrl, checksfile) {
    $ = cheerioURLContent(contentFromUrl, loadUsingCheerio);
    var checks = loadChecks(checksfile).sort();
    var out = {};
    for(var ii in checks) {
        var present = $(checks[ii]).length > 0;
        out[checks[ii]] = present;
    }
    return out;
}

var clone = function(fn) {
    // Workaround for commander.js issue.
    // http://stackoverflow.com/a/6772648
    return fn.bind({});
};

if(require.main == module) {
    program
        .option('-c, --checks <check_file>', 'Path to checks.json', clone(assertFileExists), CHECKSFILE_DEFAULT)
        .option('-u, --url <url>', 'URL to index.html')
        .option('-f, --file <html_file>', 'Path to index.html', clone(assertFileExists))
        .parse(process.argv);

    var checkJson;
    if (program.url) {
        console.log("using url");
        checkJson = checkContentFromURL(program.url, program.checks);
    }
    else {
        console.log("using file");
        checkJson = checkHtmlFile(program.file, program.checks);
    }
    var outJson = JSON.stringify(checkJson, null, 4);
    console.log(outJson);
} else {
    exports.checkHtmlFile = checkHtmlFile;
    exports.checkContentFromURL = checkContentFromURL;
}