fix: Switch converted to Object Literal (#940)

* updating a switch into object literal and fixed a couple linter errors

* added a comment about weird formatting

* style: use lodash get

* fix: pass eslint + puglint + jest

server/helpers/asset.js

@@ -1,7 +1,5 @@
 const crypto = require('crypto')
 
-/* global WIKI */
-
 module.exports = {
   /**
    * Generate unique hash from page

server/helpers/page.js

@@ -66,14 +66,11 @@ module.exports = {
       ['date', page.updatedAt],
       ['tags', '']
     ]
-    switch (page.contentType) {
-      case 'markdown':
-        return '---\n' + meta.map(mt => `${mt[0]}: ${mt[1]}`).join('\n') + '\n---\n\n' + page.content
-      case 'html':
-        return '<!--\n' + meta.map(mt => `${mt[0]}: ${mt[1]}`).join('\n') + '\n-->\n\n' + page.content
-      default:
-        return page.content
+    const inject = {
+      'markdown': '---\n' + meta.map(mt => `${mt[0]}: ${mt[1]}`).join('\n') + '\n---\n\n' + page.content,
+      'html': '<!--\n' + meta.map(mt => `${mt[0]}: ${mt[1]}`).join('\n') + '\n-->\n\n' + page.content
     }
+    return _.get(inject, page.contentType, page.content)
   },
   /**
    * Check if path is a reserved path