const { app } = require("electron"); const path = require("path"); const fs = require("fs"); const { https, http } = require("follow-redirects"); const lang = require("../lang"); const json = require("./json"); // all requests results are stored in this file const cachePath = path.join(app.getPath("cache"), "viper-requests.json"); const NORTHSTAR_LATEST_RELEASE_KEY = "nsLatestRelease"; const NORTHSTAR_RELEASE_NOTES_KEY = "nsReleaseNotes"; const VIPER_RELEASE_NOTES_KEY = "vpReleaseNotes"; const user_agent = "viper/" + json(path.join(__dirname, "../../package.json")).version; function _saveCache(data) { fs.writeFileSync(cachePath, JSON.stringify(data)); } function _getRequestsCache() { if (fs.existsSync(cachePath)) { return JSON.parse(fs.readFileSync(cachePath, "utf8")); } else { fs.writeFileSync(cachePath, "{}"); return {}; } } function delete_cache() { if (fs.existsSync(cachePath)) { return fs.rmSync(cachePath); } } // Returns latest Northstar version available from GitHub releases. If // there's no cache result for this request, or if cache exists but is // old, refreshes cache with new data. async function getLatestNsVersion() { return new Promise((resolve, reject) => { let cache = _getRequestsCache(); if (cache[NORTHSTAR_LATEST_RELEASE_KEY] && (Date.now() - cache[NORTHSTAR_LATEST_RELEASE_KEY]["time"]) < 5 * 60 * 1000) { resolve( cache[NORTHSTAR_LATEST_RELEASE_KEY]["body"]["tag_name"] ); } else { https.get({ host: "api.github.com", port: 443, path: "/repos/R2Northstar/Northstar/releases/latest", method: "GET", headers: { "User-Agent": user_agent } }, response => { response.setEncoding("utf8"); let responseData = ""; response.on("data", data => { responseData += data; }); response.on("end", _ => { cache[NORTHSTAR_LATEST_RELEASE_KEY] = { "time": Date.now(), "body": JSON.parse(responseData) }; _saveCache(cache); resolve( cache[NORTHSTAR_LATEST_RELEASE_KEY]["body"]["tag_name"] ); }); }) .on('error', () => { console.error('Failed to get latest Northstar version.'); resolve( false ); }); } }); } // Returns the download link to latest Northstar version. Should always // be called after getLatestNsVersion, as it refreshes cache data (if // needed). function getLatestNsVersionLink() { const cache = _getRequestsCache(); return cache[NORTHSTAR_LATEST_RELEASE_KEY]["body"].assets[0].browser_download_url; } // Returns and caches the Northstar release notes async function getNsReleaseNotes() { return new Promise(resolve => { let cache = _getRequestsCache(); if (cache[NORTHSTAR_RELEASE_NOTES_KEY] && (Date.now() - cache[NORTHSTAR_RELEASE_NOTES_KEY]["time"]) < 5 * 60 * 1000) { resolve( cache[NORTHSTAR_RELEASE_NOTES_KEY]["body"] ); } else { https.get({ host: "api.github.com", port: 443, path: "/repos/R2Northstar/Northstar/releases", method: "GET", headers: { "User-Agent": user_agent } }, response => { response.setEncoding("utf8"); let responseData = ""; response.on("data", data => { responseData += data; }); response.on("end", _ => { cache[NORTHSTAR_RELEASE_NOTES_KEY] = { "time": Date.now(), "body": JSON.parse(responseData) }; _saveCache(cache); resolve( cache[NORTHSTAR_RELEASE_NOTES_KEY]["body"] ); }); }) // When GitHub cannot be reached (when user doesn't have Internet // access for instance), we return latest cache content even if // it's not up-to-date, or display an error message if cache // is empty. .on('error', () => { if ( cache[NORTHSTAR_RELEASE_NOTES_KEY] ) { console.warn("Couldn't fetch Northstar release notes, returning data from cache."); resolve( cache[NORTHSTAR_RELEASE_NOTES_KEY]["body"] ); } else { console.error("Couldn't fetch Northstar release notes, cache is empty."); resolve( [lang("request.no_ns_release_notes")] ); } }); } }); } // Returns and caches the Viper release notes async function getVpReleaseNotes() { return new Promise(resolve => { let cache = _getRequestsCache(); if (cache[VIPER_RELEASE_NOTES_KEY] && (Date.now() - cache[VIPER_RELEASE_NOTES_KEY]["time"]) < 5 * 60 * 1000) { resolve( cache[VIPER_RELEASE_NOTES_KEY]["body"] ); } else { https.get({ host: "api.github.com", port: 443, path: "/repos/0negal/viper/releases", method: "GET", headers: { "User-Agent": user_agent } }, response => { response.setEncoding("utf8"); let responseData = ""; response.on("data", data => { responseData += data; }); response.on("end", _ => { cache[VIPER_RELEASE_NOTES_KEY] = { "time": Date.now(), "body": JSON.parse(responseData) }; _saveCache(cache); resolve( cache[VIPER_RELEASE_NOTES_KEY]["body"] ); }); }) // When GitHub cannot be reached (when user doesn't have Internet // access for instance), we return latest cache content even if // it's not up-to-date, or display an error message if cache // is empty. .on('error', () => { if ( cache[VIPER_RELEASE_NOTES_KEY] ) { console.warn("Couldn't fetch Viper release notes, returning data from cache."); resolve( cache[VIPER_RELEASE_NOTES_KEY]["body"] ); } else { console.error("Couldn't fetch Viper release notes, cache is empty."); resolve( [lang("request.no_vp_release_notes")] ); } }); } }); } module.exports = { delete_cache, getLatestNsVersion, getLatestNsVersionLink, getNsReleaseNotes, getVpReleaseNotes };