// ==UserScript==
// @name         gun.deals
// @namespace    http://www.ziffusion.com/
// @description  Highlights new listings since last visit.
// @author       ziffusion
// @match        https://gun.deals/*
// @grant        none
// @version      0.1
// @license      MIT
// ==/UserScript==
// defaults
var scriptID = 'ziffusion_gun_deals';
// functions
function addStyle(css) {
var style = document.createElement('style');
style.type = 'text/css';
style.innerHTML = css;
document.getElementsByTagName('head')[0].appendChild(style);
}
function fmt(key, value) {
switch (key) {
case 'history':
key = key + '[' + value.length + ']';
break;
}
return key + '=' + JSON.stringify(value);
}
// session data
var data;
if (!(data = localStorage.getItem(scriptID))) {
data = JSON.stringify({});
}
data = JSON.parse(data);
if (!data.hasOwnProperty("history")) {
data.history = [];
}
data.reset = function() {
this.history = [];
};
data.historyAdd = function(key) {
// bump the oldest one
while (this.history.length > 10) this.history.shift();
this.history.push(key);
};
// search params
for (const [key, value] of new URLSearchParams(window.location.search)) {
switch (key) {
case 'show':
var op = '';
for (const [key, value] of Object.entries(data)) if (!(value instanceof Function)) op += fmt(key, value) + '\n\n';
alert(op);
break;
case 'reset':
data.reset();
break;
}
}
// for faster lookups
var history = data.history.reduce((dict, key) => { dict[key] = true; return dict; }, {});
// mod: make visited links red
addStyle("a:visited { color: red; }");
// mod: mark the nodes
var count = 0;
for (var node of document.getElementsByClassName("tile tile--product")) {
var key = node.getAttribute("data-nid");
// mod: mark
if (key in history) {
node.style.background = "#89C4EC"; // #dfeffa
} else if (count == 0) {
data.historyAdd(key);
node.style.background = "#faeadf"; // #dfeffa
}
count++;
}
// save session state
localStorage.setItem(scriptID, JSON.stringify(data));