<?php
/**
 * This file holds the avia_sidebar class which is needed to build sidebars on the fly
 *
 * @author		Christian "Kriesi" Budschedl
 * @copyright	Copyright ( c ) Christian Budschedl
 * @link		http://kriesi.at
 * @link		http://aviathemes.com
 * @since		Version 1.9
 * @package 	AviaFramework
 */
if( ! defined( 'AVIA_FW' ) )  {  exit( 'No direct script access allowed' );  }

/**
 * AVIA Sidebar
 *
 * A simple class that adds a "add sidebar area" form to the widget page and allows to create widgets on the fly
 *
 * @since 1.9
 * @since 4.9			added support for Widget Block Editor - options and management of custom sidebars moved to Theme Options -> Sidebar Settings
 */
if( ! class_exists( 'avia_sidebar' ) )
{
	class avia_sidebar extends aviaFramework\base\object_properties
	{
		/**
		 * @since ????
		 * @var array
		 */
		protected $paths;

		/**
		 * @since ????
		 * @var array
		 */
		protected $sidebars;

		/**
		 * Option name for custom sidebars array
		 *
		 * @since ????
		 * @var string
		 */
		protected $stored;

		/**
		 *
		 * @since 4.9
		 * @var string
		 */
		protected $title;

		/**
		 * Make sure that we only load most of the stuff on the widget page, except for the register sidebar function
		 *
		 * @since ????
		 */
		public function __construct()
		{
			$this->paths = array(
						'css'	=> AVIA_CSS_URL,
						'js'	=> AVIA_JS_URL
					);

			$this->sidebars = array();
			$this->stored = 'avia_sidebars';
			$this->title = THEMENAME . ' ' . __( 'Custom Widget Area', 'avia_framework' );

			add_action( 'load-widgets.php', array( $this, 'load_assets' ), 5 );
			add_action( 'widgets_init', array( $this, 'register_custom_sidebars' ), 1000 );
			add_action( 'wp_ajax_avia_ajax_delete_custom_sidebar', array( $this, 'delete_sidebar_area' ), 1000 );
		}

		/**
		 * @since 4.9
		 */
		public function __destruct()
		{
			unset( $this->paths );
			unset( $this->sidebars );
		}

		/**
		 * load backend css, js and add hooks to the widget page
		 * @since ???
		 */
		public function load_assets()
		{
			add_action( 'admin_print_scripts', array( $this, 'template_add_widget_field' ) );
			add_action( 'load-widgets.php', array( $this, 'add_sidebar_area' ), 100);

			wp_enqueue_script( 'avia_sidebar', $this->paths['js'] . 'avia_sidebar.js' );
			wp_enqueue_style( 'avia_sidebar', $this->paths['css'] . 'avia_sidebar.css' );
		}

		/**
		 * js template that gets attached to the widget area so the user can add widget names
		 *
		 * @since ???
		 */
		public function template_add_widget_field()
		{
			$nonce = wp_create_nonce ( 'avia-delete-custom-sidebar-nonce' );
			$nonce = '<input type="hidden" name="avia-delete-custom-sidebar-nonce" value="' . $nonce . '" />';

			echo "\n<script type='text/html' id='avia-tmpl-add-widget'>";
			echo "\n  <form class='avia-add-widget' method='POST'>";
			echo "\n  <h3>{$this->title}</h3>";
			echo "\n    <span class='avia_style_wrap'><input type='text' value='' placeholder = '" . __( 'Enter Name of the new Widget Area here', 'avia_framework' ) . "' name='avia-add-widget' /></span>";
			echo "\n    <input class='avia_button' type='submit' value='" . __( 'Add Widget Area', 'avia_framework' ) . "' />";
			echo "\n    {$nonce}";
			echo "\n  </form>";
			echo "\n</script>\n";
		}

		/**
		 * adds a sidebar area to the database
		 *
		 * @since ???
		 */
		public function add_sidebar_area()
		{
			if( ! empty( $_POST[ 'avia-add-widget'] ) )
			{
				if( ! current_user_can( 'manage_options' ) )
				{
					die();
				}

				$this->sidebars = get_option( $this->stored );
				$name = $this->get_name( $_POST['avia-add-widget'] );

				if( empty( $this->sidebars ) )
				{
					$this->sidebars = array( $name );
				}
				else
				{
					$this->sidebars = array_merge( $this->sidebars, array( $name ) );
				}

				update_option( $this->stored, $this->sidebars );
				wp_redirect( admin_url( 'widgets.php' ) );

				die();
			}
		}

		/**
		 * delete a sidebar area from the database
		 *
		 * @since ???
		 */
		public function delete_sidebar_area()
		{
			check_ajax_referer( 'avia-delete-custom-sidebar-nonce' );

			if( ! current_user_can( 'manage_options' ) )
			{
				die();
			}

			if( ! empty( $_POST['name'] ) )
			{
				$name = stripslashes( $_POST['name'] );
				$this->sidebars = get_option( $this->stored );

				$key = array_search( $name, $this->sidebars );

				if( $key !== false )
				{
					unset( $this->sidebars[ $key ] );
					update_option( $this->stored, $this->sidebars );

					echo "sidebar-deleted";
				}
			}

			die();
		}

		/**
		 * checks the user submitted name and makes sure that there are no colitions
		 *
		 * @since ???
		 * @param type $name
		 * @return type
		 */
		protected function get_name( $name )
		{
			global $wp_registered_sidebars;

			if( empty( $wp_registered_sidebars ) )
			{
				return $name;
			}

			$taken = array();

			foreach ( $wp_registered_sidebars as $sidebar )
			{
				$taken[] = $sidebar['name'];
			}

			if( empty( $this->sidebars ) )
			{
				$this->sidebars = array();
			}

			$taken = array_merge( $taken, $this->sidebars );

			if( in_array( $name, $taken ) )
			{
				 $counter = substr( $name, -1 );
				 $new_name = '';

				if( ! is_numeric( $counter ) )
				{
					$new_name = $name . " 1";
				}
				else
				{
					$new_name = substr( $name, 0, -1 ) . ( (int) $counter + 1 );
				}

				$name = $this->get_name( $new_name );
			}

			return $name;
		}

		/**
		 * register custom sidebar areas
		 *
		 * @since ???
		 */
		public function register_custom_sidebars()
		{
			if( empty( $this->sidebars ) )
			{
				$this->sidebars = get_option( $this->stored );
			}

			$args = array(
						'before_widget'	=> '<div id="%1$s" class="widget clearfix %2$s">',
						'after_widget'	=> '</div>',
						'before_title'	=> '<h3 class="widgettitle">',
						'after_title'	=> '</h3>'
					);

			/**
			 * @since ???
			 * @param array $args
			 * @return array
			 */
			$args = apply_filters( 'avia_custom_widget_args', $args );

			if( is_array( $this->sidebars ) )
			{
				foreach( $this->sidebars as $sidebar )
				{
					$args['name'] = $sidebar;
					$args['id'] = avia_backend_safe_string( $sidebar, '-' );
					$args['class'] = 'avia-custom';

					register_sidebar( $args );
				}
			}
		}
	}
}