// ==UserScript==
// @name        stackexchange
// @namespace   stackexchange
// @include     http://stackexchange.com/questions?pagesize=50*
// @version     1
// @description Small script to block questions from being shown in the stackexchange hot topics list
// ==/UserScript==


//reads blocklist from storage
var listval = GM_getValue("blocklist");
var blocklist = [];
if(listval)
{
    blocklist = blocklist.concat(JSON.parse(listval));
}

//make list available in website scope
unsafeWindow.blocklist = blocklist;

//open header links in new tab/window
[].forEach.call(
    document.querySelectorAll('div.question-hot h2 a'),
    function(el) {
        el.setAttribute('target', '_blank');
    }
);

//change imagelink click handling
[].forEach.call(
    document.querySelectorAll('div.hot-question-site-icon a img'),
    function(el) {
        var a = el.parentNode;
        var questionUrl = a.href.match(/http:\/\/[^/]*\/questions\/[0-9]*\//)[0];
        if(blocklist.indexOf(questionUrl) >= 0) {
            //hide
            a.parentNode.parentNode.style.display='none';
        } else {
            //set listener
            a.addEventListener('click', xLinkHandler, false);
            a.title = 'ignore this thread';
            a.href = questionUrl;
        }
    }
);

//click on an image link hides whole div and adds Url to blocklist
function xLinkHandler(blockEvent) {
    blockEvent.preventDefault();
    blockEvent.target.parentNode.parentNode.parentNode.style.display='none';
    var questionUrl = blockEvent.target.parentNode.href;
    blocklist = blocklist.concat(questionUrl);
    GM_setValue("blocklist", JSON.stringify(blocklist));
}