// ==UserScript==
// @name         KickassTorrents Screenshot Redirect.
// @version      0.1.3
// @description  Redirects user to one of the screenshot links in the torrent's description after a delay. Also includes a link to search for screenshots on google images using a cleaned up version of the torrent's title.
// @match      kat.cr/*
// @namespace https://greasyfork.org/users/13708
// @downloadURL none
// ==/UserScript==


//User Adjustable Variables & Arrays:
//-----------------------------------

//Amount of seconds to delay before redirecting. 
var TotalSeconds = 10;
//Phrases to look for in links located in the description when deciding which links go to image hosting sites. 
var terms = ["funimg","imgextra","imgcandy","imgstudio","imgdino","imgmega","imgzap","imgtiger","imagedecode","pixsor","imgstudio","screens","imgtrex","damimage","image","pornleech","imgserve","imgclick","imgbb","screen"];
//Phrases to take out of the torrent's title when adding it to the screenshot search link.
var titleterms = ["mp4"," xxx ","1080p","720p","Split Scenes","new release","dvdrip"," sd ","new","web-dl","x264","sparrow"];

//Empty variables.
var timer;
var titletermregex;
var dateregex;
var titledate;

//Grab the description element.
var desc = document.getElementById("desc");

//Create an element for redirect information.
var node = document.createElement("P");
desc.insertBefore(node,desc.childNodes[0]); 

//Grab the title of the torrent.
var torrenttitle = document.getElementsByClassName("novertmarg")[0].getElementsByTagName("a")[0].textContent;
//Go through the terms list and remove any instances of them from the title.
for (var i3 = 0 ; i3 < titleterms.length; i3++){
titletermregex = new RegExp(titleterms[i3],"gi");
torrenttitle = torrenttitle.replace(titletermregex," ");}

//Find a date in the title and eventually replace it with the year.
var dateextract = /\d{2}\/\d{2}\/\d{2,4}/g; //Formats for 00/00/0000 or 00/00/00
var founddate = dateextract.exec(torrenttitle); //Find the date in the torrent tittle.
console.log("founddate: " + founddate);
if (founddate === null){ //If its unable to find a date formatted 00/00/0000, look for one formatted 00.00.0000
    console.log("Initial founddate was null, searching with another format.");
    var dateextract = /\d{2}.\d{2}.\d{2,4}/g; //Formats for 00.00.0000 or 00.00.00
    var founddate = dateextract.exec(torrenttitle); //Find the date in the torrent tittle.
    console.log("We had to look for a second date: " + founddate);
}
var yearextract = /\d{2,4}$/g; //Formats for two to four digits at the end of the input.
var foundyear = yearextract.exec(founddate); //Find the year in the found date.
console.log("foundyear: " + foundyear);
if (foundyear !== null){ //Check to see if any year was found.
    if (foundyear.toString().length == 4){  //If the found year is four digits long
        console.log("foundyear is 4 digits long.");
        torrenttitle = torrenttitle.replace(founddate,foundyear); //Replace the found date with the found year.
        console.log("Replaced: " + founddate + " with " + foundyear);
    } else if (foundyear.toString().length == 2){  //If the found year is not four digits long but is two digits long.
        console.log("foundyear is 2 digits long.");
        torrenttitle = torrenttitle.replace(founddate,"20"+foundyear); //Replace the found date with the found year with "20" infront of it.
        console.log("Replaced: " + founddate + " with " + "20"+foundyear);
    }
} else { //If no year was found.
    console.log("No year is found.");
}
//Look for date formatted Month 00, 0000. (Not included in the above code since both are sometimes included.)
var dateextract = /[a-zA-Z]{3,9}\s+\d{1,2}\s*,?\s*\d{4}/g; //Formats Month 00, 0000. http://www.htmlgoodies.com/html5/javascript/date-parsing-using-javascript-and-regular-expressions.html#fbid=bYzXbVT0mSd
var founddate2 = dateextract.exec(torrenttitle); //Find the date in the title.
console.log("founddate2: " + founddate2);
if (founddate2 !== null){  //If we found a date formated Month 00, 0000.
    console.log("founddate2 exists, lookng for the year.");
    var yearextract = /\d{4}$/g; //Formats for four digits at the end of the input.
    var foundyear2 = yearextract.exec(founddate2); //Find the year in the found date.
    console.log("Found year: " + foundyear2 + " from founddate2.");
    if(torrenttitle.indexOf(foundyear2) >= -1 && foundyear !== null){ //Find if the foundyear2 is in torrenttittle and year1 was found
        console.log(foundyear2 + " already belongs in torrenttitle from another search.");
        torrenttitle = torrenttitle.replace(founddate2," "); //Remove the found date from the title.
        console.log("Removed " + founddate2 + " from torrenttitle."); 
    }else{
        console.log(foundyear2 + " belongs in the torrenttittle but not from another search");
        torrenttitle = torrenttitle.replace(founddate2,foundyear2); //Replace the found date with the found year.
        console.log("Replaced: " + founddate2 + " with " + foundyear2);
    }
} else{
    console.log("No Month 00, 0000 date found.");
}

//More title cleaning up.
torrenttitle = torrenttitle.replace(/[\-\[\]\/\{\}\(\)\=\*\+\.\\\^\$\|]/g, " "); //Remove special characters.
torrenttitle = torrenttitle.replace(/\s+/g, " "); //Removes any uncessesary spaces.

//Create an element for title search information.
var searchnode= document.createElement("P");
searchnode.id = "searchelement";
desc.insertBefore(searchnode,desc.childNodes[0]); 
searchnode.style.textAlign = "center";
searchnode.style.fontWeight = "bold";

//Creates links for Google & Bing searches and places them in an element.
var googlelink = document.createElement('a');
var googlelinktext = document.createTextNode("Search Google Images for screenshots.");
googlelink.appendChild(googlelinktext);
googlelink.id = "GoogleLink";
googlelink.href = "https://www.google.com/search?q=" + torrenttitle + "+porn&tbm=isch";
var binglink = document.createElement('a');
var binglinktext = document.createTextNode("Search Bing Images for Screenshots.");
binglink.appendChild(binglinktext);
binglink.id = "BingLink";
binglink.href = "http://www.bing.com/images/search?q=" + torrenttitle;
//Add the links and some formatting to searchnode.
searchnode.appendChild(document.createElement("hr"));
searchnode.appendChild(document.createElement("br"));
searchnode.appendChild(googlelink);
searchnode.appendChild(document.createElement("br"));
searchnode.appendChild(document.createElement("br"));
searchnode.appendChild(binglink);

//Gather all the links in the descripton.
var templinks = desc.getElementsByTagName('a');
//Transfer the HTMLCollection into an array.
var links = [].slice.call(templinks);

//Removes the Google and Bing search links from the list of links so they don't accidently become the redirect link.
findWithAttr(links, 'id', 'GoogleLink'); 
findWithAttr(links, 'id', 'BingLink'); 
function findWithAttr(array, attr, value) {
    for(var i = 0; i < array.length; i++) {
        if(array[i][attr] === value) {
            console.log("Found " + value + " at index: " + i + " and removed it.");
            links.splice(i, 1);
        }
    }
}       

console.log("terms.length= " + terms.length);
//Find the last link in the description that includes one of the terms. 
for (var i = 0 ; i < terms.length; i++){//Go through the list of terms.
    console.log("Processing term:" + terms[i] + " for link1");
    if(links[links.length-1].innerHTML.toLowerCase().indexOf(terms[i]) > -1 && links[links.length-1].href.indexOf("/user/") == -1){ //If the last link in the desc has a term in it, AND does not link to a userpage.
        console.log("Lowest link contains: " + terms[i] + " and is not a user link.");
        var goodlink = links[links.length-1]; //Save that link in a variable.
        console.log("Saving: " + links[links.length-1] + " to goodlink.");
        Tick(); //Start the redirect timer.
        console.log("Starting timer.");
        var foundgoodlink = true; //let the next loop know that we found a good link.
        break; //stop the loop once we've found a good link.
    }
    if (i == terms.length-1){ //If ther were no links found, let the second loop know.
        console.log("No link found with lowest link.");
        foundgoodlink = false;
    }
}
if (foundgoodlink === false){  //If the first loop didn't find a good link, run loop.
    for (var i = 0 ; i < terms.length; i++){ //Go through the list of terms.    
    console.log("Processing term:" + terms[i] + " for link2"); 
        if (links[links.length-2].innerHTML.toLowerCase().indexOf(terms[i]) > -1 && links[links.length-2].href.indexOf("/user/") == -1){  //If the last link failed, check the second to last.
            console.log("Second lowest link contains: " + terms[i] + " and is not a user link.");
            var goodlink = links[links.length-2]; //Save that link in a variable.
            console.log("Saving: " + links[links.length-2] + " to goodlink.");
            Tick();  //Start the redirect timer.  
            console.log("Starting timer.");
            break; //stop the loop once we've found a good link.
        } 
        if (i == terms.length-1){
           console.log("No link found on second lowest.");
           node.innerHTML = "<hr><center><b>No link found. An acceptable link may be here, but is not included in our terms to look for. Consider updating the 'terms' array or contacting the developer.<b><br></center><hr>"; //If no good links were found, report to the user.
        }
    }
}
         
//Function to loop during the redirect countdown.
function Tick() {
    TotalSeconds = TotalSeconds - 1; //Remove one second from the remaning seconds.
    node.innerHTML = "<hr><center><br><b>Redirecting to screenshot in: " + TotalSeconds + " seconds.<br><br><p id='timerbutton'>Click here to stay on this page.</p></b></center><hr>"; //Update the amount of time left in the display.
    timer = setTimeout(Tick, 1000); //Start a one second timer to restart this function.
    document.getElementById("timerbutton").onclick=function(){clearTimeout(timer);}; //If the "stay on this page" button is pressed, stop the timer.
    if (TotalSeconds === 0){ //If the countdown reaches 0...
        location.assign(goodlink); //Redirect to the screenshot link.
        //clearTimeout(timer);
    }
}