rebase from live enviornment

wp/plugins/wordpress-seo/admin/class-collector.php

@@ -0,0 +1,52 @@
+<?php
+/**
+ * WPSEO plugin file.
+ *
+ * @package WPSEO\Admin
+ */
+
+/**
+ * Collects the data from the added collection objects.
+ */
+class WPSEO_Collector {
+
+	/**
+	 * Holds the collections.
+	 *
+	 * @var WPSEO_Collection[]
+	 */
+	protected $collections = [];
+
+	/**
+	 * Adds a collection object to the collections.
+	 *
+	 * @param WPSEO_Collection $collection The collection object to add.
+	 */
+	public function add_collection( WPSEO_Collection $collection ) {
+		$this->collections[] = $collection;
+	}
+
+	/**
+	 * Collects the data from the collection objects.
+	 *
+	 * @return array The collected data.
+	 */
+	public function collect() {
+		$data = [];
+
+		foreach ( $this->collections as $collection ) {
+			$data = array_merge( $data, $collection->get() );
+		}
+
+		return $data;
+	}
+
+	/**
+	 * Returns the collected data as a JSON encoded string.
+	 *
+	 * @return false|string The encode string.
+	 */
+	public function get_as_json() {
+		return WPSEO_Utils::format_json_encode( $this->collect() );
+	}
+}