redfin_script

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        https://www.redfin.com/*
// @grant        none
// @require http://code.jquery.com/jquery-latest.js
// @run-at document-start
// ==/UserScript==

(function() {
    'use strict';

    var interval = setInterval(run, 200);
    function run(){
        console.log('run()');

        $('.kay-and-kevin').remove();

        var issues = [];

        // lot size
        var lotSize = extractNumberFromString($(':contains("Lot Size"):last').next().text());

        // stop refreshing once lot size is available
        if(typeof lotSize == 'number') {
            clearInterval(interval);
        }

        if(lotSize < 3000) {
            issues.push(makeIssue('Small Lot - ' + lotSize, 'BAD'));
        } else if(lotSize < 4000) {
            issues.push(makeIssue('Medium Lot - ' + lotSize, 'OK'));
        } else {
            issues.push(makeIssue('Big Enough Lot - ' + lotSize, 'GOOD'));
        }

        // parking
        if($(':contains("No Parking"):last').text() === 'No Parking') {
            issues.push(makeIssue('No Parking','BAD'));
        } else {
            issues.push(makeIssue('Has Parking','GOOD'));
        }

        // redfin refund
        var LEASE_BREAKING_FEE = 3426;
        var refund = extractNumberFromString($('[data-rift-target="commission_refund"]').text());
        if(refund >= LEASE_BREAKING_FEE) {
            issues.push(makeIssue('Refund ($' + refund + ') greater than lease breaking fee ($' + LEASE_BREAKING_FEE + ') by $' + (refund-LEASE_BREAKING_FEE), 'GOOD'));
        } else {
            issues.push(makeIssue('Refund ($' + refund + ') less than lease breaking fee ($' + LEASE_BREAKING_FEE + ') by $' + (LEASE_BREAKING_FEE-refund), 'BAD'));
        }

        // make list of issue divs
        issues.forEach(function(issue) {
            makeAlertDiv(issue).insertBefore( ".criticalComponents.pageComponentsContainer" );
        });

        function makeIssue(issue, sev) {
            return {
                issue: issue,
                sev: sev
            };
        }

        function makeAlertDiv(issue) {
            var alertDiv = $('<div class="kay-and-kevin">'+issue.issue+'</div>');
            switch(issue.sev) {
                case 'BAD':
                    alertDiv.css('background-color', '#eca1a6');
                    break;
                case 'OK':
                    alertDiv.css('background-color', '#ffef96');
                    break;
                case 'GOOD':
                    alertDiv.css('background-color', '#b5e7a0');
                    break;
            }

            return alertDiv;

        }

        function extractNumberFromString(str) {
            return parseInt(str.replace(/[^0-9\.]/g, ''),10);
        }

    }

})();