MercLister - Liveweave

function readSave() {
	var txt = document.getElementById("savegame").value;
	var inputMercs = document.getElementById("inputMercs").value;
	if (txt.indexOf("Fe12NAfA3R6z4k0z") > -1) {
		document.getElementById("error").innerHTML = "Decoding...";
		var result = txt.split("Fe12NAfA3R6z4k0z");
		txt = "";
		for (var i = 0; i < result[0].length; i += 2)
			txt += result[0][i];
		var data = JSON.parse(decode64(txt));
		mercs(data.mercenaries.mercRoller.seed, inputMercs);
	}
	else
		document.getElementById("error").innerHTML = "Not a valid save, try again.";
}

function mercs(seed, inputMercs) {
	var output = "";
	var bonusTypes = ["Gold","HS","Rubies","Skills","Success","Recruitment"];
	for (var i = 0; i < inputMercs; i++) {
		seed = randNum(seed); // gender
		seed = randNum(seed); // name
		seed = randNum(seed); // death phrase
		seed = randNum(seed); // rarity
		var rarity = getRarity(seed);	
		seed = randNum(seed); // bonus type
		var bonusType = seed % 6;
		while (bonusType == 4) { 
			seed = randNum(seed); // if bonus type is Success keep trying
			bonusType = seed % 6; 
		}
		seed = randNum(seed); // added with nov 24th patch
		output += i + ': ' + rarity + ' ' + bonusTypes[bonusType] + '<br>';
	}
	document.getElementById("error").innerHTML = output;
}

function randNum(seed) {
	return (seed * 16807) % 2147483647;
}

function getRarity(seed) {
	var chance = [5000, 2000, 800, 300, 100, 25, 8, 1];
	var rarities = ["Common","Uncommon","Rare","Epic","Fabled","Mythical","Legendary","Transcendent"];
	var sum = 0;
	for (var i = 0; i < 8; i++)
		sum += chance[i];
	var rand = seed % sum + 1;
	sum = 0;
	for (i in chance)	{
		sum += chance[i];
		if (rand <= sum)
			return rarities[i];
	}		
}

function decode64(input) {
	var keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
	var output = "";
	var chr1, chr2, chr3 = "";
	var enc1, enc2, enc3, enc4 = "";
	var i = 0;
	// remove all characters that are not A-Z, a-z, 0-9, +, /, or =
	var base64test = /[^A-Za-z0-9\+\/\=]/g;
	if (base64test.exec(input)) {
		alert("There were invalid base64 characters in the input text.\n" +
				"Valid base64 characters are A-Z, a-z, 0-9, '+', '/',and '='\n" +
				"Expect errors in decoding.");
	}
	input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
	do {
		enc1 = keyStr.indexOf(input.charAt(i++));
		enc2 = keyStr.indexOf(input.charAt(i++));
		enc3 = keyStr.indexOf(input.charAt(i++));
		enc4 = keyStr.indexOf(input.charAt(i++));
		chr1 = (enc1 << 2) | (enc2 >> 4);
		chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
		chr3 = ((enc3 & 3) << 6) | enc4;
		output = output + String.fromCharCode(chr1);
		if (enc3 != 64)
			output = output + String.fromCharCode(chr2);
		if (enc4 != 64)
			output = output + String.fromCharCode(chr3);
		chr1 = chr2 = chr3 = "";
		enc1 = enc2 = enc3 = enc4 = "";
	} while (i < input.length);
	return unescape(output);
}