change callback to await in processSubredditAbout

inc/processSubredditAbout.js

@@ -1,8 +1,7 @@
 const config = require('../config');
+const { redisAsync } = require('./redis');
 
-async function processSubredditAbout(subreddit, redis, fetch, RedditAPI) {
+function returnRelevantKeys(json) {
-  if (subreddit && !subreddit.includes('+') && subreddit !== 'all') {
-    function returnRelevantKeys(json) {
   return {
     title: json.data.title,
     public_description_html: json.data.public_description_html,
@@ -13,104 +12,53 @@ async function processSubredditAbout(subreddit, redis, fetch, RedditAPI) {
     description_html: json.data.description_html,
     moderators: json.moderators,
   };
+}
+
+async function processSubredditAbout(subreddit, redis, fetch, RedditAPI) {
+  if (subreddit && !subreddit.includes('+') && subreddit !== 'all') {
+    const key = `${subreddit}:sidebar`;
+
+    try {
+      const cached = await redisAsync.get(key);
+
+      if (cached !== null) {
+        return returnRelevantKeys(JSON.parse(cached));
       }
 
-    let key = `${subreddit}:sidebar`;
-    redis.get(key, (error, json) => {
-      if (error) {
-        console.error(
-          `Error getting the ${subreddit}:sidebar key from redis.`,
-          error
-        );
-        return null;
-      }
-      if (json) {
-        json = JSON.parse(json);
-        return returnRelevantKeys(json);
-      } else {
       let url = `https://reddit.com/r/${subreddit}/about.json`;
+
       if (config.use_reddit_oauth) {
         url = `https://oauth.reddit.com/r/${subreddit}/about`;
       }
-        fetch(encodeURI(url), redditApiGETHeaders())
+
-          .then((result) => {
+      const subredditAboutRequest = await fetch(url, redditApiGETHeaders());
-            if (result.status === 200) {
+
-              result.json().then((json) => {
+      if (subredditAboutRequest.ok) {
-                json.moderators = [];
+        let response = await subredditAboutRequest.json();
-                redis.setex(
+        response.moderators = [];
+
+        await redisAsync.setex(
           key,
           config.setexs.sidebar,
-                  JSON.stringify(json),
+          JSON.stringify(response)
-                  (error) => {
-                    if (error) {
-                      console.error(
-                        'Error setting the sidebar key to redis.',
-                        error
         );
-                      return res.render('index', {
-                        json: null,
-                        user_preferences: req.cookies,
-                      });
-                    } else {
-                      console.log('Fetched the sidebar from reddit API.');
-                      let moderators_url = `https://reddit.com/r/${subreddit}/about/moderators.json`;
-                      if (config.use_reddit_oauth) {
-                        moderators_url = `https://oauth.reddit.com/r/${subreddit}/about/moderators`;
-                      }
-                      return returnRelevantKeys(json);
-                      /*
-                       * The following code is commented out because Reddit doesn't
-                       * anymore support fetching moderators for subreddits
-                       * when not logged in.
-                       * This might change in the future though.
-                       * https://codeberg.org/teddit/teddit/issues/207
-                       */
 
-                      /*
+        console.log(`Fetched sidebar for ${subreddit} from reddit API`);
-                  fetch(encodeURI(moderators_url), redditApiGETHeaders())
+
-                  .then(mod_result => {
+        return returnRelevantKeys(response);
-                    if(mod_result.status === 200) {
-                      mod_result.json()
-                      .then(mod_json => {
-                        json.moderators = mod_json
-                        redis.setex(key, config.setexs.sidebar, JSON.stringify(json), (error) => {
-                          if(error) {
-                            console.error('Error setting the sidebar with moderators key to redis.', error)
-                            return res.render('index', { json: null, user_preferences: req.cookies })
-                          } else {
-                            console.log('Fetched the moderators from reddit API.')
-                            return(returnRelevantKeys(json))
-                          }
-                        })
-                      })
-                    } else {
-                      console.error(`Something went wrong while fetching moderators data from reddit API. ${mod_result.status} – ${mod_result.statusText}`)
-                      console.error(config.reddit_api_error_text)
-                      return(returnRelevantKeys(json))
-                    }
-                  }).catch(error => {
-                    console.error('Error fetching moderators.', error)
-                    return(returnRelevantKeys(json))
-                  })
-                  */
-                    }
-                  }
-                );
-              });
       } else {
         console.error(
-                `Something went wrong while fetching data from reddit API. ${result.status} – ${result.statusText}`
+          `Something went wrong while fetching data from reddit API: 
+          ${subredditAboutRequest.status} – ${subredditAboutRequest.statusText}`
         );
         console.error(config.reddit_api_error_text);
         return null;
       }
-          })
+    } catch (error) {
-          .catch((error) => {
+      console.error('Error fetching the sidebar: ', error);
-            console.error('Error fetching the sidebar.', error);
+
       return null;
-          });
     }
-    });
   } else {
     return null;
   }