Discovery API: add slug to category options

Author: patrickkfkan

examples/discovery/getAvailableOptions_output.txt

@@ -2,27 +2,33 @@
   "categories": [
     {
       "name": "all categories",
-      "value": 0
+      "value": 0,
+      "slug": "all"
     },
     {
       "name": "digital",
-      "value": 1
+      "value": 1,
+      "slug": "digital"
     },
     {
       "name": "vinyl",
-      "value": 2
+      "value": 2,
+      "slug": "vinyl"
     },
     {
       "name": "compact discs",
-      "value": 3
+      "value": 3,
+      "slug": "cd"
     },
     {
       "name": "cassettes",
-      "value": 4
+      "value": 4,
+      "slug": "cassette"
     },
     {
       "name": "t-shirts",
-      "value": 5
+      "value": 5,
+      "slug": "tshirt"
     }
   ],
   "genres": [

src/lib/discovery/DiscoverOptionsParser.ts

@@ -35,7 +35,7 @@ export default class DiscoverOptionsParser {
         result.genres = options.genres.map((genre: any) => ({ name: genre.label, value: genre.slug, id: genre.id }));
       }
       if (Array.isArray(options.categories)) {
-        result.categories = options.categories.map((cat: any) => ({ name: cat.label, value: cat.id }));
+        result.categories = options.categories.map((cat: any) => ({ name: cat.label, value: cat.id, slug: cat.slug }));
       }
       if (Array.isArray(options.slices)) {
         result.sortBys = options.slices.map((s: any) => ({ name: s.label, value: s.slug }));