feat(api-fields): change whitelist for blacklist

admin/wp-pwa-admin-page.php

@@ -411,7 +411,7 @@
 			 <div class="message-header">
 					<nav class="level">
 						<div class="level-left">
-							<strong>Whitelist WP API fields</strong>
+							<strong>Filter WP API fields</strong>
 						</div>
 						<div class="level-right">
 							<a href="#" class="close-api-fields" style="color:inherit"><i class="fa fa-times-circle" aria-hidden="true"></i></a>
@@ -436,7 +436,7 @@
 						?>
 						<textarea id="api-fields" class="textarea"><?php echo $api_fields_output; ?></textarea>
 					</p>
-					<p><em>* Delete all fields to deactivate the whitelisting.</em></p>
+					<p><em>* Use dot notation for nested fields (i.e: title.rendered).</em></p>
 					<br>
 					<p>
 						<a href="#" id="save-api-fields"class="button button-lg">Save</a>

libs/class-rest-api-filter-fields.php

@@ -97,8 +97,6 @@ public function filter_magic( $response, $post, $request ){
   $filters = isset($settings['wp_pwa_api_fields']) ? $settings['wp_pwa_api_fields'] : array();  
 
   if(sizeof($filters) !== 0){
-
-    $filters[] = '_embedded';
     // Create a new array
     $filtered_data = array();
 
@@ -126,7 +124,7 @@ public function filter_magic( $response, $post, $request ){
     // Foreach property inside the data, check if the key is in the filter.
     foreach ($data as $key => $value) {
       // If the key is in the $filters array, add it to the $filtered_data
-      if (in_array($key, $singleFilters)) {
+      if (!in_array($key, $singleFilters)) {
         $filtered_data[$key] = $value;
       }
     }
@@ -137,7 +135,7 @@ public function filter_magic( $response, $post, $request ){
     foreach ($childFilters as $childFilter) {
       $val = $this->array_path_value($data,$childFilter);
       if($val != null){
-        $this->set_array_path_value($filtered_data,$childFilter,$val);
+        $this->unset_array_path_value($filtered_data,$childFilter,$val);
       }
     }
 
@@ -165,6 +163,20 @@ function childValueFilterArray($var){
   return (strpos($var,'.') !=false);
 }
 
+function unset_array_path_value(&$array, $path) {
+  $path = explode('.', $path);
+  $temp = & $array;
+
+  foreach($path as $key) {
+      if(isset($temp[$key])){
+          if(!($key == end($path))) $temp = &$temp[$key];
+      } else {
+         return false; //invalid path
+      }
+  }
+  unset($temp[end($path)]);
+}
+
 // found on http://codeaid.net/php/get-values-of-multi-dimensional-arrays-using-xpath-notation
 function array_path_value(array $array, $path, $default = null)
 {