feat: top tags limit and sort on opportunity preview

Author: capJavert

src/schema/opportunity.ts

@@ -20,7 +20,6 @@ import {
   getBufferFromStream,
   getSecondsTimestamp,
   toGQLEnum,
-  uniqueifyArray,
   uniqueifyObjectArray,
   updateFlagsStatement,
 } from '../common';
@@ -1751,9 +1750,27 @@ export const resolvers: IResolvers<unknown, BaseContext> = traceResolvers<
           true,
         );
 
-      const tags = uniqueifyArray(
-        connection.edges.flatMap(({ node }) => node.topTags || []),
+      const flatTags = connection.edges.flatMap(({ node }) => {
+        return node.topTags || [];
+      });
+      const uniqueTagsMap = flatTags.reduce(
+        (acc, item) => {
+          // map tags to how much they appear across all users
+          if (typeof acc[item] === 'undefined') {
+            acc[item] = 1;
+          } else {
+            acc[item] += 1;
+          }
+
+          return acc;
+        },
+        {} as Record<string, number>,
       );
+      // final map and sort to get X tags that appear the most
+      const tags = Object.entries(uniqueTagsMap)
+        .sort((a, b) => b[1] - a[1])
+        .slice(0, 16)
+        .map(([tag]) => tag);
 
       const companies = getShowcaseCompanies();