convert processMoreComments to use async function

inc/processMoreComments.js

@@ -1,17 +1,17 @@
-module.exports = function() {
+const config = require('../config');
-  const config = require('../config')
+const { redisAsync } = require('./redis');
-  this.moreComments = (fetch, redis, post_url, comment_ids, id) => {
+
-    return new Promise(resolve => {
+async function moreComments(fetch, redis, post_url, comment_ids, id) {
-      (async () => {
+  if (post_url) {
     let key = `${post_url}:morechildren:comment_ids:${comment_ids}`
     redis.get(key, (error, json) => {
       if (error) {
         console.error(`Error getting the ${key} key from redis (moreComments()).`, error)
-            resolve(false)
+        return null;
       }
       if (json) {
         json = JSON.parse(json)
-            resolve(json)
+        return json;
       } else {
         let url = `https://oauth.reddit.com/api/morechildren?api_type=json&children=${comment_ids}&limit_children=false&link_id=t3_${id}`
         fetch(encodeURI(url), redditApiGETHeaders())
@@ -25,30 +25,32 @@ module.exports = function() {
                   redis.setex(key, config.setexs.posts, JSON.stringify(comments), (error) => {
                     if (error) {
                       console.error(`Error setting the ${key} key to redis (moreComments()).`, error)
-                          resolve(false)
+                      return null;
                     } else {
                       console.log(`Fetched the JSON from Reddit (endpoint "morechildren") for URL: ${post_url}. (moreComments())`)
-                          resolve(comments)
+                      return comments;
                     }
                   })
                 } else {
-                      resolve(false)
+                  return null;
                 }
               } else {
-                    resolve(false)
+                return null;
               }
             })
           } else {
             console.error(`Something went wrong while fetching data from Reddit. ${result.status} – ${result.statusText} (moreComments())`)
-                resolve(false)
+            return null;
           }
         }).catch(error => {
           console.log(`Error fetching the JSON from Reddit (endpoint "morechildren") with url: ${url}. (moreComments())`, error)
-              resolve(false)
+          return null;
         })
       }
     })
-      })()
+  } else {
-    })
+    return null;
   }
 }
+
+module.exports = moreComments;