first commit

wp-content/plugins/elementor-pro/core/utils/collection.php

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+<?php
+namespace ElementorPro\Core\Utils;
+
+use \Elementor\Core\Utils\Collection as Collection_Base;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
+// TODO: Move to Core.
+class Collection extends Collection_Base implements \JsonSerializable {
+
+	/**
+	 * Change the items key by an item field.
+	 *
+	 * @param string $key
+	 *
+	 * @return Collection
+	 */
+	public function key_by( $key ) {
+		return $this->map_with_keys( function ( $item ) use ( $key ) {
+			return [ $item->{$key} => $item ];
+		} );
+	}
+
+	/**
+	 * Flatten the items recursively.
+	 *
+	 * @return array
+	 */
+	public function flatten_recursive() {
+		$output = [];
+		$items = $this->all();
+
+		array_walk_recursive($items, function( $item ) use ( &$output ) {
+			$output[] = $item;
+		} );
+
+		return $output;
+	}
+
+	/**
+	 * Run array_diff between the collection and other array or collection.
+	 *
+	 * @param $filter
+	 *
+	 * @return $this
+	 */
+	public function diff( $filter ) {
+		if ( $filter instanceof Collection_Base ) {
+			$filter = $filter->all();
+		}
+
+		return new static( array_diff( $this->all(), $filter ) );
+	}
+
+	/**
+	 * Reverse the array
+	 *
+	 * @param false $preserve_keys
+	 *
+	 * @return $this
+	 */
+	public function reverse( $preserve_keys = false ) {
+		return new static(
+			array_reverse( $this->all(), $preserve_keys )
+		);
+	}
+
+	/**
+	 * Return a JSON serialized representation of the Collection.
+	 *
+	 * @return array
+	 */
+	#[\ReturnTypeWillChange]
+	public function jsonSerialize() {
+		return $this->all();
+	}
+}

wp-content/plugins/elementor-pro/core/utils/registrar.php

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+<?php
+
+namespace ElementorPro\Core\Utils;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit; // Exit if accessed directly.
+}
+
+/**
+ * Basic items registrar.
+ *
+ * TODO: Move to Core.
+ */
+class Registrar {
+
+	/**
+	 * @var array
+	 */
+	private $items;
+
+	/**
+	 * Registrar constructor.
+	 *
+	 * @return void
+	 */
+	public function __construct() {
+		$this->items = [];
+	}
+
+	/**
+	 * Register a new item.
+	 *
+	 * @param           $instance - Item instance.
+	 * @param string    $id - Optional - For BC - Deprecated.
+	 *
+	 * @return boolean - Whether the item was registered.
+	 */
+	public function register( $instance, $id = null ) {
+		// TODO: For BC. Remove in the future.
+		if ( ! $id ) {
+			// Get the ID or default to the class name.
+			$id = ( method_exists( $instance, 'get_id' ) ) ? $instance->get_id() : get_class( $instance );
+		}
+
+		if ( $this->get( $id ) ) {
+			return false;
+		}
+
+		$this->items[ $id ] = $instance;
+
+		return true;
+	}
+
+	/**
+	 * Get an item by ID.
+	 *
+	 * @param string $id
+	 *
+	 * @return array|null
+	 */
+	public function get( $id = null ) {
+		if ( ! $id ) {
+			return $this->items;
+		}
+
+		return isset( $this->items[ $id ] ) ? $this->items[ $id ] : null;
+	}
+}