MOBILE-2178 database: Prefetch getFields WS call

Author: dpalou

www/addons/mod/data/services/data.js

@@ -829,11 +829,13 @@ angular.module('mm.addons.mod_data')
      * @module mm.addons.mod_data
      * @ngdoc method
      * @name $mmaModData#getFields
-     * @param   {Number}    dataId          Data ID.
-     * @param   {String}    [siteId]        Site ID. If not defined, current site.
-     * @return  {Promise}                   Promise resolved when the database is retrieved.
+     * @param  {Number} dataId         Data ID.
+     * @param  {Boolean} [forceCache]  True to always get the value from cache, false otherwise. Default false.
+     * @param  {Boolean} [ignoreCache] True if it should ignore cached data (it will always fail in offline or server down).
+     * @param  {String} [siteId]       Site ID. If not defined, current site.
+     * @return {Promise}               Promise resolved when the fields are retrieved.
      */
-    self.getFields = function(dataId, siteId) {
+    self.getFields = function(dataId, forceCache, ignoreCache, siteId) {
         return $mmSitesManager.getSite(siteId).then(function(site) {
             var params = {
                     databaseid: dataId
@@ -842,6 +844,13 @@ angular.module('mm.addons.mod_data')
                     cacheKey: getFieldsCacheKey(dataId)
                 };
 
+            if (forceCache) {
+                preSets.omitExpires = true;
+            } else if (ignoreCache) {
+                preSets.getFromCache = 0;
+                preSets.emergencyCache = 0;
+            }
+
             return site.read('mod_data_get_fields', params, preSets).then(function(response) {
                 if (response && response.fields) {
                     return response.fields;

www/addons/mod/data/services/prefetch_handler.js

@@ -323,6 +323,8 @@ angular.module('mm.addons.mod_data')
             var database = info.database,
                 promises = [];
 
+            promises.push($mmaModData.getFields(database.id, false, true, siteId));
+
             promises.push($mmFilepool.addFilesToQueueByUrl(siteId, info.files, self.component, module.id));
 
             angular.forEach(info.groups, function(group) {