// ==UserScript==
// @name        CH MTurk Page Titles
// @author      clickhappier
// @namespace   clickhappier
// @description Change MTurk page titles to be more specific, instead of most just saying "Amazon Mechanical Turk".
// @version     2.1c
// @require     http://code.jquery.com/jquery-latest.min.js
// @match       http://www.mturk.com/*
// @match       https://www.mturk.com/*
// @grant       GM_log
// @downloadURL none
// ==/UserScript==


var original_title = document.title;

// avoid redundancy from what will be appended
if (original_title == "Amazon Mechanical Turk - All HITs")
{
    original_title = "Amazon Mechanical Turk";
}
else if (original_title == "Amazon Mechanical Turk - HITs Available to You")
{
    original_title = "Amazon Mechanical Turk";
}
else if (original_title == "Amazon Mechanical Turk - All Qualifications")
{
    original_title = "Amazon Mechanical Turk";
}
else if (original_title == "Amazon Mechanical Turk-Your Pending Qualification Requests")
{
    original_title = "Amazon Mechanical Turk";
}
else if (original_title == "Amazon Mechanical Turk - Transfer Earnings")
{
    original_title = "Amazon Mechanical Turk";
}
else if (original_title == "Mechanical Turk")  // avoid inconsistency
{
    original_title = "Amazon Mechanical Turk";
}


// get URL variable - from http://css-tricks.com/snippets/javascript/get-url-variables/
function getQueryVariable(variable)
{
    var query = window.location.search.substring(1);
    var vars = query.split("&");
    for ( var i=0; i<vars.length; i++ ) 
    {
        var pair = vars[i].split("=");
        if ( pair[0] == variable )
            { return pair[1]; }
    }
    return(false);
}


// append heading-esque text from page content
if ( document.location.href.indexOf('?hit_scraper') > -1 )  // for URL used by https://greasyfork.org/scripts/2002-hit-scraper-with-export
{
	document.title = original_title + " - " + "HIT Scraper";
}
else if ( $('td.title_orange_text_bold').text().trim() != "" )  // search results pages
{
    if ( document.location.href.indexOf('prevRequester=') > -1 )  // if redirected to 'all HITs' search results from preview/panda link with no more HITs available; if not already included in the URL from accepting a previous HIT in the group, can make a note of the requester name by adding this value to the URL yourself; use + signs for spaces
    {
        document.title = original_title + " - was " + decodeURIComponent( getQueryVariable("prevRequester").replace(/\+/g, " ") ) + " - " + $('td.title_orange_text_bold').text().trim() + " - " + $('td.title_orange_text').text().trim();
    }
    else
    {
	    document.title = original_title + " - " + $('td.title_orange_text_bold').text().trim() + " - " + $('td.title_orange_text').text().trim();
	}
}
else if ( $('td.capsulelink_bold').text().trim() != "" )  // individual HIT/qual pages
{
    if ( $('td.capsule_field_text').first().text().trim() != "" )
    {
        if ( document.location.href.indexOf('qualification') > -1 )  // qual page
        {
            document.title = original_title + " - Qual by " + $('td.capsule_field_text').first().text().trim() + " - " + $('td.capsulelink_bold').text().trim();
        }
        else  // HIT page
        {
            document.title = original_title + " - HIT by " + $('td.capsule_field_text').first().text().trim() + " - " + $('td.capsulelink_bold').text().trim();
        }
    }
    else
    {
	    document.title = original_title + " - " + $('td.capsulelink_bold').text().trim();
	}
}
else if ( $('div.contactus form p').first().text().trim() != "" )  // contact pages
{
	if ( document.location.href.indexOf('requesterId=') > -1 )  // contact requester pages
	{
	    document.title = original_title + " - " + $('div.contactus form p').first().text().trim() + " (" + getQueryVariable("requesterId") + ")";
	}
	else  // contact mturk page
	{
	    document.title = original_title + " - " + $('div.contactus form p').first().text().trim();
	}
}
else if ( $('td.white_text_14_bold').text().trim() != "" )  // dashboard/status/earnings pages
{
	document.title = original_title + " - " + $('td.white_text_14_bold').contents().filter(function(){return this.nodeType == 3;})[0].nodeValue.trim();  // exclude text inside another layer of nested tags such as 'a' or 'span'
}
else if ( $('td.error_title').text().trim() != "" )  // no search results pages, other error pages
{
    if ( document.getElementById('searchbox').value != "" )  // keyword search with no results
    {
        document.title = original_title + " - " + $('td.error_title').text().trim() + " - " + document.getElementById('searchbox').value;
    }
    else if ( document.location.href.indexOf('requesterId=') > -1 )  // requester id search with no results
    {
        if ( document.location.href.indexOf('prevRequester=') > -1 )  // doesn't appear in these URLs on its own, but can make a note of the requester name by adding this value to the URL yourself; use + signs for spaces
        {
            document.title = original_title + " - was " + decodeURIComponent( getQueryVariable("prevRequester").replace(/\+/g, " ") ) + " - " + $('td.error_title').text().trim() + " - "  + getQueryVariable("requesterId").replace(/\+/g, " ");
        }
        else
        {
            document.title = original_title + " - " + $('td.error_title').text().trim() + " - "  + getQueryVariable("requesterId").replace(/\+/g, " ");
        }
    }
    else  // other error pages
    {
	    document.title = original_title + " - " + $('td.error_title').text().trim();
	}
}
else if ( $('div.title_orange_text_bold').text().trim() != "" )  // help/policies pages
{
	document.title = original_title + " - " + $('div.title_orange_text_bold').text().trim();
}
else if ( $('span#alertboxHeader').text().trim() != "" )  // report-a-HIT confirmation pages
{
	document.title = original_title + " - " + $('span#alertboxHeader').text().trim();
}
else if ( document.location.href.indexOf('/qualtable') > -1 )  // for URL used by https://greasyfork.org/scripts/4188-mturk-qualsorter
{
	document.title = original_title + " - " + "QualSorter Table";
}


// uncomment (remove the // in front of) the below line to make all titles start with 'AMT' instead of 'Amazon Mechanical Turk'
// document.title = document.title.replace("Amazon Mechanical Turk", "AMT");