also validate codes

package.json

@@ -3,10 +3,14 @@
   "version": "1.0.0",
   "main": "communities.json",
   "scripts": {
-    "test": "prettier -c communities.json || (npm run fmt && git diff && exit 1)",
+    "test": "npm run fmt-check && npm run validate-codes",
+    "validate-codes": "node ./validate.js",
+    "fmt-check": "prettier -c communities.json || (npm run fmt && git diff && exit 1)",
     "fmt": "prettier --write communities.json"
   },
   "devDependencies": {
+    "chalk": "^2.4.2",
+    "node-fetch": "^2.3.0",
     "prettier": "^1.16.1"
   }
 }

validate.js

@@ -0,0 +1,51 @@
+const util = require('util');
+const chalk = require('chalk');
+const fetch = require('node-fetch');
+const discordCommunities = require('./communities.json');
+
+const delay = ms => new Promise(resolve => setTimeout(resolve, ms));
+
+async function validateCommunity(community) {
+  while (true) {
+    const req = await fetch(`https://discordapp.com/api/invite/${community.inviteCode}`);
+    const response = await req.json();
+
+    if (response.guild) break;
+
+    if (response.retry_after) {
+      console.log(chalk.yellow(`Rate limited for ${response.retry_after}ms, waiting`));
+      await delay(response.retry_after);
+      continue;
+    }
+
+    throw new Error(
+      `${chalk.yellow.bold(community.title)} (${community.inviteCode}): ${util.inspect(response)}`
+    );
+  }
+}
+
+async function validate() {
+  console.log(chalk.underline.bold.white('Validating open source community invite codes'));
+
+  const failedCommunities = [];
+
+  for (const community of discordCommunities.data) {
+    console.log(`${community.title} (${community.inviteCode})`);
+    try {
+      await validateCommunity(community);
+    } catch (err) {
+      failedCommunities.push(err.message);
+    }
+  }
+
+  if (failedCommunities.length) {
+    console.error(chalk.red.bold('Could not validate some community codes!\n'));
+    console.error(failedCommunities.join('\n') + '\n');
+    throw new Error('Failed to validate invite codes');
+  }
+}
+
+validate().catch(err => {
+  console.error(err.message);
+  process.exit(1);
+});