feat: download link will now get the user's OS automatically (#2)

src/lib/platform.ts

@@ -0,0 +1,71 @@
+import UAParser from 'ua-parser-js';
+import GithubReleaseResponse from '../types/githubReleaseResponse';
+
+function getUserPlatform(): string | undefined {
+    const parser = new UAParser();
+    const result = parser.getResult();
+    const { os } = result;
+    console.log(result);
+    let minifiedPlatform: string | undefined;
+
+    switch (os.name?.toLowerCase()) {
+        case 'mac os':
+            minifiedPlatform = 'mac';
+            break;
+        case 'windows':
+            minifiedPlatform = 'win';
+            break;
+        case 'linux':
+        case 'fedora' :
+        case 'debian' :
+        case 'gentoo' :
+        case 'ubuntu' :
+        case 'mint':
+        case 'pcLinuxos':
+        case 'redhat' :
+        case 'suse':
+        case 'slackware':
+        case 'manjaro':
+        case 'arch':
+            minifiedPlatform = 'lin';
+            break;
+        default:
+            minifiedPlatform = undefined;
+            break;
+    }
+
+    return minifiedPlatform;
+}
+
+async function getDownloadLinkForPlatform(platform: string | undefined): Promise<string> {
+    let defaultDownloadLink = 'https://github.com/unitystation/stationhub/releases/latest';
+
+    if (platform === undefined) {
+        return defaultDownloadLink;
+    }
+
+    return await fetchGithubReleases().then(
+        (response: GithubReleaseResponse) => {
+            const assets = response.assets;
+            const asset = assets.find(asset => asset.name.includes(platform));
+            if (asset !== undefined) {
+                defaultDownloadLink = asset.browser_download_url;
+            }
+
+            return defaultDownloadLink;
+        });
+}
+
+function fetchGithubReleases(): Promise<GithubReleaseResponse> {
+    const githubReleasesApi = 'https://api.github.com/repos/unitystation/stationhub/releases/latest';
+    return fetch(githubReleasesApi).then( response => {
+        return response.json()
+    });
+}
+
+function getDownloadLink(): Promise<string> {
+    const platform = getUserPlatform();
+    return getDownloadLinkForPlatform(platform);
+}
+
+export default getDownloadLink;