check URL of communities

package.json

@@ -20,6 +20,7 @@
     "test": "npm-run-all test:data test:js",
     "test:data": "node scripts/test-communities.js && node scripts/test-conferences.js",
     "test:js": "jest",
+    "test:data:url": "node scripts/test-communities-check-url.mjs",
     "watch": "npm-run-all build:communities build:conferences build:conferences-ics -p dev"
   },
   "jest": {

scripts/test-communities-check-url.mjs

@@ -0,0 +1,24 @@
+import path from 'path';
+import fs from 'fs';
+
+const communitiesDir = path.resolve(import.meta.dirname, '../communities/');
+
+const communitiesPath = fs
+  .readdirSync(communitiesDir)
+  .filter(file => file.endsWith('.json'))
+  .map(file => path.join(communitiesDir, file));
+
+const communities = communitiesPath
+  .map(file => fs.readFileSync(file).toString())
+  .map(fileContent => JSON.parse(fileContent));
+
+const fetchCommunities = communities.map(community => fetch(community.url));
+
+const failedURL = (await Promise.all(fetchCommunities))
+  .filter(communityResponse => !communityResponse.ok)
+  .map(communityResponse => communityResponse.url);
+
+if (failedURL.length > 0) {
+  console.log(failedURL);
+  process.exit(1);
+}