update grav et plugin

system/src/Grav/Common/Data/Data.php

@@ -32,6 +32,12 @@ class Data implements DataInterface, \ArrayAccess, \Countable, \JsonSerializable
     /** @var File */
     protected $storage;
 
+    /** @var bool */
+    private $missingValuesAsNull = false;
+
+    /** @var bool */
+    private $keepEmptyValues = true;
+
     /**
      * @param array $items
      * @param Blueprint|callable $blueprints
@@ -42,6 +48,28 @@ class Data implements DataInterface, \ArrayAccess, \Countable, \JsonSerializable
         $this->blueprints = $blueprints;
     }
 
+    /**
+     * @param bool $value
+     * @return $this
+     */
+    public function setKeepEmptyValues(bool $value)
+    {
+        $this->keepEmptyValues = $value;
+
+        return $this;
+    }
+
+    /**
+     * @param bool $value
+     * @return $this
+     */
+    public function setMissingValuesAsNull(bool $value)
+    {
+        $this->missingValuesAsNull = $value;
+
+        return $this;
+    }
+
     /**
      * Get value by using dot notation for nested arrays/objects.
      *
@@ -202,8 +230,8 @@ class Data implements DataInterface, \ArrayAccess, \Countable, \JsonSerializable
     public function filter()
     {
         $args = func_get_args();
-        $missingValuesAsNull = (bool)(array_shift($args) ?: false);
-        $keepEmptyValues = (bool)(array_shift($args) ?: false);
+        $missingValuesAsNull = (bool)(array_shift($args) ?? $this->missingValuesAsNull);
+        $keepEmptyValues = (bool)(array_shift($args) ?? $this->keepEmptyValues);
 
         $this->items = $this->blueprints()->filter($this->items, $missingValuesAsNull, $keepEmptyValues);