Merge pull request #39 from myDevicesIoT/feat--get-all-attribute-groups

Feat: get all attribute groups from cayenne api

Author: tdeleanu

lib/Services/cayenne.js

@@ -161,6 +161,18 @@ class Cayenne extends Request {
     return this.send('GET', path, { query });
   }
 
+  /**
+   * Gets all attribute groups and attributes for a user and app
+   * @param {string} applicationId
+   * @param {string} userId        The user id of the user that owns the parent device
+   * @param {Object} query
+   */
+  getAllAttributeGroups(applicationId, userId, query) {
+    const path = `/things/groups`;
+    query = this.setTenant(applicationId, userId);
+    return this.send('GET', path, { query });
+  }
+
   /**
    * Delete all groups and attributes for a user
    * @param {string} applicationId