85 lines
1.9 KiB
JavaScript
85 lines
1.9 KiB
JavaScript
"use strict";
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const pkg = require("../../package.json");
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const request = require("request");
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const TIME_TO_LIVE = 15 * 60 * 1000; // 15 minutes, in milliseconds
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module.exports = {
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fetch,
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};
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const versions = {
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current: {
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version: `v${pkg.version}`,
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},
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};
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function fetch(callback) {
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// Serving information from cache
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if (versions.current.changelog) {
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callback(versions);
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return;
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}
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request.get({
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uri: "https://api.github.com/repos/thelounge/thelounge/releases",
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headers: {
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"Accept": "application/vnd.github.v3.html", // Request rendered markdown
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"User-Agent": pkg.name + "; +" + pkg.repository.git, // Identify the client
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},
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}, (error, response, body) => {
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if (error || response.statusCode !== 200) {
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callback(versions);
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return;
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}
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let i;
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let release;
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let prerelease = false;
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body = JSON.parse(body);
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// Find the current release among releases on GitHub
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for (i = 0; i < body.length; i++) {
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release = body[i];
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if (release.tag_name === versions.current.version) {
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versions.current.changelog = release.body_html;
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prerelease = release.prerelease;
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break;
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}
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}
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// Find the latest release made after the current one if there is one
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if (i > 0) {
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for (let j = 0; j < i; j++) {
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release = body[j];
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// Find latest release or pre-release if current version is also a pre-release
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if (!release.prerelease || release.prerelease === prerelease) {
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versions.latest = {
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prerelease: release.prerelease,
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version: release.tag_name,
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url: release.html_url,
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};
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break;
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}
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}
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}
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// Add expiration date to the data to send to the client for later refresh
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versions.expiresAt = Date.now() + TIME_TO_LIVE;
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// Emptying cached information after reaching said expiration date
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setTimeout(() => {
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delete versions.current.changelog;
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delete versions.latest;
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}, TIME_TO_LIVE);
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callback(versions);
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});
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}
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