set expiredAt to cache contributors

src/server/routes/apiv3/staffs.js

@@ -3,28 +3,40 @@ const express = require('express');
 const axios = require('axios');
 
 const router = express.Router();
+const { isAfter, addMonths } = require('date-fns');
 
 const contributors = require('../../../client/js/components/StaffCredit/Contributor');
 
+let expiredAt;
+
 module.exports = (crowi) => {
 
   router.get('/', async(req, res) => {
+    const now = new Date();
+
     const growiCloudUri = await crowi.configManager.getConfig('crowi', 'app:growiCloudUri');
     if (growiCloudUri == null) {
-      return res.json({});
-    }
-    const url = new URL('_api/staffCredit', growiCloudUri);
-    try {
-      const gcContributorsRes = await axios.get(url.toString());
-      // prevent merge gcContributors to contributors more than once
-      if (contributors[1].sectionName !== 'GROWI-cloud') {
-        contributors.splice(1, 0, gcContributorsRes.data);
-      }
       return res.apiv3({ contributors });
     }
-    catch (err) {
-      return res.apiv3Err(err, 500);
+    if (expiredAt == null || isAfter(now, expiredAt)) {
+      const url = new URL('_api/staffCredit', growiCloudUri);
+      try {
+        const gcContributorsRes = await axios.get(url.toString());
+        // prevent merge gcContributors to contributors more than once
+        if (contributors[1].sectionName !== 'GROWI-cloud') {
+          contributors.splice(1, 0, gcContributorsRes.data);
+        }
+        else {
+          contributors.splice(1, 1, gcContributorsRes.data);
+        }
+        // caching 'expiredAt' for 1 month
+        expiredAt = addMonths(now, 1);
+      }
+      catch (err) {
+        return res.apiv3Err(err, 500);
+      }
     }
+    return res.apiv3({ contributors });
   });
 
   return router;