Adds total questions per difficulty to the stats bar.
// ==UserScript==
// @name Better Stats Bar (LeetCode)
// @description Adds total questions per difficulty to the stats bar.
// @namespace https://greasyfork.org/en/users/128831-marvinyan
// @match https://leetcode.com/problemset/algorithms/
// @grant none
// @require https://greasyfork.org/scripts/374849-library-onelementready-es6/code/Library%20%7C%20onElementReady%20ES6.js?version=649483
// @version 0.0.1.20190102075610
// ==/UserScript==
(() => {
const LC_ALGO_API = 'https://leetcode.com/api/problems/algorithms/';
const getData = url =>
new Promise((resolve, reject) => {
const xhr = new XMLHttpRequest();
xhr.open('GET', url, true);
xhr.onload = () => {
if (xhr.status >= 200 && xhr.status < 300) {
resolve(xhr.response);
} else {
reject({
status: xhr.status,
statusText: xhr.statusText
});
}
};
xhr.onerror = () => {
reject({
status: xhr.status,
statusText: xhr.statusText
});
};
xhr.send();
});
const parseData = response => {
const counts = [0, 0, 0];
const questions = JSON.parse(response).stat_status_pairs;
questions.forEach(q => {
counts[q.difficulty.level - 1]++;
});
return counts;
};
const updateStatsBar = counts => {
const statsBar = $('#welcome > span > span');
let $totalSolvedSpan = $(statsBar[0]).closest('span');
const newText = $totalSolvedSpan.text().replace('/', ' / ');
$totalSolvedSpan.text(newText);
for (let i = 1; i < statsBar.length; i++) {
statsBar[i].append(` / ${counts[i - 1]}`);
}
};
const run = async () => {
const data = await getData(LC_ALGO_API);
const counts = parseData(data);
updateStatsBar(counts);
};
waitForKeyElements('#welcome', run);
})();