Yoast Notification Center setup

admin/class-yoast-notification-center.php

@@ -0,0 +1,78 @@
+<?php
+
+class Yoast_Notification_Center {
+
+	const COOKIE_KEY = 'yoast_notices';
+
+	/**
+	 * Get the notifications from cookie
+	 *
+	 * @return array
+	 */
+	private static function get_notifications_from_cookie() {
+
+		// The notifications array
+		$notifications = array();
+
+		// Check if cookie is set
+		if ( isset( $_COOKIE[ self::COOKIE_KEY ] ) ) {
+
+			// Get json notifications from cookie
+			$json_notifications = json_decode( $_COOKIE[ self::COOKIE_KEY ], true );
+
+			// Create Yoast_Notification objects
+			if ( count( $json_notifications ) > 0 ) {
+				foreach ( $json_notifications as $json_notification ) {
+					$notifications[] = new Yoast_Notification( $json_notification['message'], $json_notification['type'] );
+				}
+			}
+		}
+
+		return $notifications;
+	}
+
+	/**
+	 * Display the message
+	 */
+	public static function display_notices() {
+
+		// Get the messages
+		$notifications = self::get_notifications_from_cookie();
+
+		// Display notifications
+		if ( count( $notifications ) > 0 ) {
+			foreach ( $notifications as $notification ) {
+				add_action( 'all_admin_notices', array( $notification, 'output' ) );
+			}
+		}
+
+		// Remove the cookie
+		setcookie( self::COOKIE_KEY, null, -1 );
+	}
+
+	/**
+	 * Add notification to the cookie
+	 *
+	 * @param Yoast_Notification $notification
+	 */
+	public static function add_notice( Yoast_Notification $notification ) {
+
+		// Get the messages
+		$notifications = self::get_notifications_from_cookie();
+
+		// Add the message
+		$notifications[] = $notification;
+
+		// Create array with all notifications
+		$arr_notifications = array();
+
+		// Add each notification as array to $arr_notifications
+		foreach($notifications as $notification ) {
+			$arr_notifications[] = $notification->to_array();
+		}
+
+		// Set the cookie with notifications
+		setcookie( self::COOKIE_KEY, json_encode( $arr_notifications ), time() * 60 * 10 );
+	}
+
+}

admin/class-yoast-notification.php

@@ -0,0 +1,66 @@
+<?php
+
+class Yoast_Notification {
+
+	private $message;
+	private $type;
+
+	/**
+	 * The Constructor
+	 *
+	 * @param String $message
+	 * @param String $type
+	 */
+	public function __construct( $message, $type = 'updated' ) {
+		$this->message = $message;
+		$this->type    = $type;
+	}
+
+	/**
+	 * @return String
+	 */
+	public function get_message() {
+		return $this->message;
+	}
+
+	/**
+	 * @param String $message
+	 */
+	public function set_message( $message ) {
+		$this->message = $message;
+	}
+
+	/**
+	 * @return String
+	 */
+	public function get_type() {
+		return $this->type;
+	}
+
+	/**
+	 * @param String $type
+	 */
+	public function set_type( $type ) {
+		$this->type = $type;
+	}
+
+	/**
+	 * Return the object properties as an array
+	 *
+	 * @return array
+	 */
+	public function to_array() {
+		return array(
+			'message' => $this->get_message(),
+			'type'    => $this->get_type()
+		);
+	}
+
+	/**
+	 * Output the message
+	 */
+	public function output() {
+		echo '<div class="' . $this->get_type() . '"><p>' . $this->get_message() . '</p></div>' . PHP_EOL;
+	}
+
+}

wp-seo-main.php

@@ -76,6 +76,9 @@ function wpseo_auto_load( $class ) {
 			'yoast_plugin_license_manager'       =>	WPSEO_PATH . 'admin/license-manager/class-plugin-license-manager.php',
 			'yoast_product'                      =>	WPSEO_PATH . 'admin/license-manager/class-product.php',
 
+			'yoast_notification_center'          =>	WPSEO_PATH . 'admin/class-yoast-notification-center.php',
+			'yoast_notification'                 =>	WPSEO_PATH . 'admin/class-yoast-notification.php',
+
 			'wp_list_table'                      => ABSPATH . 'wp-admin/includes/class-wp-list-table.php',
 			'walker_category'                    => ABSPATH . 'wp-includes/category-template.php',
 			'pclzip'                             => ABSPATH . 'wp-admin/includes/class-pclzip.php',
@@ -262,6 +265,9 @@ function wpseo_admin_init() {
 	if ( $options['enablexmlsitemap'] === true ) {
 		$GLOBALS['wpseo_sitemaps_admin'] = new WPSEO_Sitemaps_Admin;
 	}
+
+	// Display Yoast notifications
+	Yoast_Notification_Center::display_notices();
 }
 
 add_action( 'plugins_loaded', 'wpseo_init', 14 );