Common reorg (#8025)

* Re-organize common folder

* fix: Correct paths in tests

* fix: move new content to proper folder

* chore: Move audio folder to assets

* Move sprites to sprites assets directory

* Move css sprites to assets directory

* Split out readmes for common code and sprites

* Move images to assets directory

* Move destinatin of shared browserified file

* remove unused file

* move compiled js to client-old

* Fix karma tests

* fix: Correct paths for sprites

website/common/script/ops/openMysteryItem.js

@@ -0,0 +1,39 @@
+import content from '../content/index';
+import i18n from '../i18n';
+import {
+  BadRequest,
+} from '../libs/errors';
+import _ from 'lodash';
+
+module.exports = function openMysteryItem (user, req = {}, analytics) {
+  let item = user.purchased.plan.mysteryItems.shift();
+
+  if (!item) {
+    throw new BadRequest(i18n.t('mysteryItemIsEmpty', req.language));
+  }
+
+  item = _.cloneDeep(content.gear.flat[item]);
+  user.items.gear.owned[item.key] = true;
+
+  user.markModified('purchased.plan.mysteryItems');
+
+  if (analytics) {
+    analytics.track('open mystery item', {
+      uuid: user._id,
+      itemKey: item,
+      itemType: 'Subscriber Gear',
+      acquireMethod: 'Subscriber',
+      category: 'behavior',
+      headers: req.headers,
+    });
+  }
+
+  if (req.v2 === true) {
+    return user.items.gear.owned;
+  } else {
+    return [
+      item,
+      i18n.t('mysteryItemOpened', req.language),
+    ];
+  }
+};