docs: automated announcement bar (#2231)

scripts/doc-change-release.js

@@ -0,0 +1,61 @@
+#!/usr/bin/env node
+
+const { Octokit } = require("@octokit/core");
+const fs = require('fs');
+const path = require('path');
+
+const shouldExpire = process.argv.indexOf('--expire') !== -1;
+const octokit = new Octokit({
+  auth: process.env.GH_TOKEN
+});
+
+async function main () {
+  let announcement = {};
+
+  if (shouldExpire) {
+    //check if the file was last updated 6 days ago
+    try {
+      const fileStat = fs.statSync(path.join(__dirname, '..', 'www', 'docs', 'announcement.json'));
+      if (dateDiffInDays(fileStat.mtime, new Date()) < 6) {
+        console.log("File was edited less than 6 days ago. Expiry canceled.");
+        return;
+      }
+    } catch (e) {
+      //file doesn't exist, continue
+    }
+  } else {
+    //retrieve the latest release
+    const response = await octokit.request('GET /repos/{owner}/{repo}/releases/latest', {
+      owner: 'medusajs',
+      repo: 'medusa'
+    });
+
+    const version = response.data.tag_name;
+
+    //add new announcement
+    announcement = {
+      id: `release-${version.replace(/\./g, '-')}`,
+      content: `New Release! Version ${version} of Medusa is out now! Read all about it <a href='${response.data.html_url}'>here</a>.`,
+      backgroundColor: '#7C53FF',
+      textColor: '#fff',
+      isCloseable: false,
+    }
+  }
+
+  //write new config file
+  fs.writeFileSync(path.join(__dirname, '..', 'www', 'docs', 'announcement.json'), JSON.stringify(announcement));
+  console.log(`Announcement Bar has been ${shouldExpire ? 'removed' : 'added'}`);
+}
+
+const _MS_PER_DAY = 1000 * 60 * 60 * 24;
+
+// a and b are javascript Date objects
+function dateDiffInDays(a, b) {
+  // Discard the time and time-zone information.
+  const utc1 = Date.UTC(a.getFullYear(), a.getMonth(), a.getDate());
+  const utc2 = Date.UTC(b.getFullYear(), b.getMonth(), b.getDate());
+
+  return Math.floor((utc2 - utc1) / _MS_PER_DAY);
+}
+
+main();