<?php
/**
 * Elated Sidebar
 * Class for adding custom widget area and choose them on single pages/posts/portfolios
 * 
 */
 
if( ! class_exists( 'eltd_sidebar' ) ){
	
	class eltd_sidebar{
	
		var $sidebars  = array();
		var $stored    = "";
	    
		// load needed stuff on widget page
		function __construct(){
			$this->stored	= 'eltd_sidebars';
			$this->title = __('Custom Widget Area','eltd');
		    
			add_action('load-widgets.php', array(&$this, 'load_assets') , 5 );
			add_action('widgets_init', array(&$this, 'register_custom_sidebars') , 1000 );
			add_action('wp_ajax_eltd_ajax_delete_custom_sidebar', array(&$this, 'delete_sidebar_area') , 1000 );
		}
		
		//load css, js and add hooks to the widget page
		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('eltd_sidebar' , ELATED_ROOT . '/framework/admin/assets/js/eltdf-sidebar.js');
			wp_enqueue_style( 'eltd_sidebar' , ELATED_ROOT . '/framework/admin/assets/css/eltdf-sidebar.css');
		}
		
		//widget form template
		function template_add_widget_field(){
			$nonce =  wp_create_nonce ('eltd-delete-sidebar');
			$nonce = '<input type="hidden" name="eltd-delete-sidebar" value="'.$nonce.'" />';

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

		//add sidebar area to the db
		function add_sidebar_area(){
			if(!empty($_POST['eltd-add-widget'])){
				$this->sidebars = get_option($this->stored);
				$name = $this->get_name($_POST['eltd-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 sidebar area from the db
		function delete_sidebar_area(){
			check_ajax_referer('eltd-delete-sidebar');

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

				if(($key = array_search($name, $this->sidebars)) !== false){
					unset($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
		function get_name($name){
			if(empty($GLOBALS['wp_registered_sidebars'])) return $name;

			$taken = array();
			foreach ( $GLOBALS['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
		function register_custom_sidebars(){
		
			if(empty($this->sidebars)) $this->sidebars = get_option($this->stored);

			$args = array(
				'before_widget' => '<div class="widget %2$s">', 
				'after_widget'  => '</div>', 
				'before_title'  => '<h4>', 
				'after_title'   => '</h4>'
			);
				
			$args = apply_filters('eltd_custom_widget_args', $args);

			if(is_array($this->sidebars)){
				foreach ($this->sidebars as $sidebar){	
					$args['name']  = $sidebar;
					$args['id']  = sanitize_title($sidebar);
					$args['class'] = 'eltd-custom';
					register_sidebar($args);
				}
			}
		}
		
	}
}