<?php

/**
 * Class Radium_Theme_Importer
 *
 * This class provides the capability to import demo content as well as import widgets and WordPress menus
 *
 * @since 0.0.2
 *
 * @category RadiumFramework
 * @package  NewsCore WP
 * @author   Franklin M Gitonga
 * @link     http://radiumthemes.com/
 *
 */

 // Exit if accessed directly
 if ( !defined( 'ABSPATH' ) ) exit;

 // Don't duplicate me!
 if ( !class_exists( 'Radium_Theme_Importer' ) ) {

	class Radium_Theme_Importer {

		/**
		 * Set the theme framework in use
		 *
		 * @since 0.0.3
		 *
		 * @var object
		 */
		public $theme_options_framework = 'radium'; //supports radium framework and option tree

		/**
		 * Holds a copy of the object for easy reference.
		 *
		 * @since 0.0.2
		 *
		 * @var object
		 */
		public $theme_options_file;

		/**
		 * Holds a copy of the object for easy reference.
		 *
		 * @since 0.0.2
		 *
		 * @var object
		 */
		public $widgets;

		/**
		 * Holds a copy of the object for easy reference.
		 *
		 * @since 0.0.2
		 *
		 * @var object
		 */
		public $content_demo;

		/**
		 * Flag imported to prevent duplicates
		 *
		 * @since 0.0.3
		 *
		 * @var array
		 */
		public $flag_as_imported = array( 'content' => false, 'menus' => false, 'options' => false, 'widgets' =>false );

		/**
		 * imported sections to prevent duplicates
		 *
		 * @since 0.0.3
		 *
		 * @var array
		 */
		public $imported_demos = array();

		/**
		 * Flag imported to prevent duplicates
		 *
		 * @since 0.0.3
		 *
		 * @var bool
		 */
		public $add_admin_menu = true;

	    /**
	     * Holds a copy of the object for easy reference.
	     *
	     * @since 0.0.2
	     *
	     * @var object
	     */
	    private static $instance;

	    /**
	     * Constructor. Hooks all interactions to initialize the class.
	     *
	     * @since 0.0.2
	     */
	    public function __construct() {

	        self::$instance = $this;

	        $this->demo_files_path 		= apply_filters('radium_theme_importer_demo_files_path', $this->demo_files_path);

	        $this->theme_options_file 	= apply_filters('radium_theme_importer_theme_options_file', $this->demo_files_path . $this->theme_options_file_name);

	        $this->widgets 				= apply_filters('radium_theme_importer_widgets_file', $this->demo_files_path . $this->widgets_file_name);

	        $this->content_demo 		= apply_filters('radium_theme_importer_content_demo_file', $this->demo_files_path . $this->content_demo_file_name);

			$this->imported_demos = get_option( 'radium_imported_demo' );

            if( $this->theme_options_framework == 'optiontree' ) {
                $this->theme_option_name = ot_options_id();
            }

	        if( $this->add_admin_menu ) add_action( 'admin_menu', array($this, 'add_admin') );

			add_filter( 'add_post_metadata', array( $this, 'check_previous_meta' ), 10, 5 );

      		add_action( 'radium_import_end', array( $this, 'after_wp_importer' ) );

	    }

		/**
		 * Add Panel Page
		 *
		 * @since 0.0.2
		 */
	    public function add_admin() {

	        add_submenu_page('themes.php', "Import Demo Data", "Import Demo Data", 'switch_themes', 'radium_demo_installer', array($this, 'demo_installer'));

	    }

	    /**
         * Avoids adding duplicate meta causing arrays in arrays from WP_importer
         *
         * @param null    $continue
         * @param unknown $post_id
         * @param unknown $meta_key
         * @param unknown $meta_value
         * @param unknown $unique
         *
         * @since 0.0.2
         *
         * @return
         */
        public function check_previous_meta( $continue, $post_id, $meta_key, $meta_value, $unique ) {

			$old_value = get_metadata( 'post', $post_id, $meta_key );

			if ( count( $old_value ) == 1 ) {

				if ( $old_value[0] === $meta_value ) {

					return false;

				} elseif ( $old_value[0] !== $meta_value ) {

					update_post_meta( $post_id, $meta_key, $meta_value );
					return false;

				}

			}

    	}

    	/**
    	 * Add Panel Page
    	 *
    	 * @since 0.0.2
    	 */
    	public function after_wp_importer() {

			do_action( 'radium_importer_after_content_import');

			update_option( 'radium_imported_demo', $this->flag_as_imported );

		}

    	public function intro_html() {

			?>

			<div style="background-color: #F5FAFD; margin:10px 0;padding: 5px 10px;color: #0C518F;border: 2px solid #CAE0F3; clear:both; width:90%; line-height:18px;">
			    <p class="tie_message_hint">Importing demo data (post, pages, images, theme settings, ...) is the easiest way to setup your theme. It will
			    allow you to quickly edit everything instead of creating content from scratch. When you import the data following things will happen:</p>

			      <ul style="padding-left: 20px;list-style-position: inside;list-style-type: square;}">
			          <li>No existing posts, pages, categories, images, custom post types or any other data will be deleted or modified .</li>
			          <li>No WordPress settings will be modified .</li>
			          <li>Posts, pages, some images, some widgets and menus will get imported .</li>
			          <li>Images will be downloaded from our server, these images are copyrighted and are for demo use only .</li>
			          <li>Please click import only once and wait, it can take a couple of minutes</li>
			      </ul>
			 </div>

			 <div style="background-color: #F5FAFD; margin:10px 0;padding: 5px 10px;color: #0C518F;border: 2px solid #CAE0F3; clear:both; width:90%; line-height:18px;"><p class="tie_message_hint">Before you begin, make sure all the required plugins are activated.</p></div>

			 <?php

			 if( !empty($this->imported_demos) ) { ?>

			  	<div style="background-color: #FAFFFB; margin:10px 0;padding: 5px 10px;color: #8AB38A;border: 2px solid #a1d3a2; clear:both; width:90%; line-height:18px;">
			  		<p><?php _e('Demo already imported', 'radium'); ?></p>
			  	</div><?php
			   	//return;

			  }
    	}

	    /**
	     * demo_installer Output
	     *
	     * @since 0.0.2
	     *
	     * @return null
	     */
	    public function demo_installer() {

			$action = isset($_REQUEST['action']) ? $_REQUEST['action'] : '';

			if( !empty($this->imported_demos ) ) {

				$button_text = __('Import Again', 'radium');

			} else {

				$button_text = __('Import Demo Data', 'radium');

			}

	        ?><div id="icon-tools" class="icon32"><br></div>
	        <h2>Import Demo Data</h2>

	       <div class="radium-importer-wrap" data-demo-id="1"  data-nonce="<?php echo wp_create_nonce('radium-demo-code'); ?>">

		        <form method="post">
		        	<?php $this->intro_html(); ?>
		          	<input type="hidden" name="demononce" value="<?php echo wp_create_nonce('radium-demo-code'); ?>" />
		          	<input name="reset" class="panel-save button-primary radium-import-start" type="submit" value="<?php echo $button_text ; ?>" />
		          	<input type="hidden" name="action" value="demo-data" />

		          	<br />
		          	<br />
					<div class="radium-importer-message clear">
				        <?php if( 'demo-data' == $action && check_admin_referer('radium-demo-code' , 'demononce')){
				         	$this->process_imports();
			 	        } ?>
					</div>
	 	        </form>

 	        </div>

	        <br />
	        <br /><?php

	    }

	    /**
	     * Process all imports
	     *
	     * @params $content
	     * @params $options
	     * @params $options
	     * @params $widgets
	     *
	     * @since 0.0.3
	     *
	     * @return null
	     */
	    public function process_imports( $content = true, $options = true, $options = true, $widgets = true) {

			if ( $content && !empty( $this->content_demo ) && is_file( $this->content_demo ) ) {
				$this->set_demo_data( $this->content_demo );
			}

			if ( $options && !empty( $this->theme_options_file ) && is_file( $this->theme_options_file ) ) {
				$this->set_demo_theme_options( $this->theme_options_file );
			}

			if ( $options ) {
				$this->set_demo_menus();
			}

			if ( $widgets && !empty( $this->widgets ) && is_file( $this->widgets ) ) {
				$this->process_widget_import_file( $this->widgets );
			}

			do_action( 'radium_import_end');

        }

	    /**
	     * add_widget_to_sidebar Import sidebars
	     * @param  string $sidebar_slug    Sidebar slug to add widget
	     * @param  string $widget_slug     Widget slug
	     * @param  string $count_mod       position in sidebar
	     * @param  array  $widget_settings widget settings
	     *
	     * @since 0.0.2
	     *
	     * @return null
	     */
	    public function add_widget_to_sidebar($sidebar_slug, $widget_slug, $count_mod, $widget_settings = array()){

	        $sidebars_widgets = get_option('sidebars_widgets');

	        if(!isset($sidebars_widgets[$sidebar_slug]))
	           $sidebars_widgets[$sidebar_slug] = array('_multiwidget' => 1);

	        $newWidget = get_option('widget_'.$widget_slug);

	        if(!is_array($newWidget))
	            $newWidget = array();

	        $count = count($newWidget)+1+$count_mod;
	        $sidebars_widgets[$sidebar_slug][] = $widget_slug.'-'.$count;

	        $newWidget[$count] = $widget_settings;

	        update_option('sidebars_widgets', $sidebars_widgets);
	        update_option('widget_'.$widget_slug, $newWidget);

	    }

	    public function set_demo_data( $file ) {

		    if ( !defined('WP_LOAD_IMPORTERS') ) define('WP_LOAD_IMPORTERS', true);

	        require_once ABSPATH . 'wp-admin/includes/import.php';

	        $importer_error = false;

	        if ( !class_exists( 'WP_Importer' ) ) {

	            $class_wp_importer = ABSPATH . 'wp-admin/includes/class-wp-importer.php';

	            if ( file_exists( $class_wp_importer ) ){

	                require_once($class_wp_importer);

	            } else {

	                $importer_error = true;

	            }

	        }

	        if ( !class_exists( 'WP_Import' ) ) {

	            $class_wp_import = dirname( __FILE__ ) .'/wordpress-importer.php';

	            if ( file_exists( $class_wp_import ) )
	                require_once($class_wp_import);
	            else
	                $importer_error = true;

	        }

	        if($importer_error){

	            die("Error on import");

	        } else {

	            if(!is_file( $file )){

	                echo "The XML file containing the dummy content is not available or could not be read .. You might want to try to set the file permission to chmod 755.<br/>If this doesn't work please use the Wordpress importer and import the XML file (should be located in your download .zip: Sample Content folder) manually ";

	            } else {

	               	$wp_import = new WP_Import();
	               	$wp_import->fetch_attachments = true;
	               	$wp_import->import( $file );
					$this->flag_as_imported['content'] = true;

	         	}

	    	}

	    	do_action( 'radium_importer_after_theme_content_import');


	    }

	    public function set_demo_menus() {}

	    public function set_demo_theme_options( $file ) {

	    	// Does the File exist?
			if ( file_exists( $file ) ) {

				// Get file contents and decode
				$data = file_get_contents( $file );

				if( $this->theme_options_framework == 'radium') {

					//radium framework
					$data = unserialize( trim($data, '###') );

				} elseif( $this->theme_options_framework == 'optiontree' ) {

					//option tree import
					$data = $this->optiontree_decode($data);
					
					update_option( ot_options_id(), $data );
					
					$this->flag_as_imported['options'] = true;

				} else {

					//other frameworks
					//$data = json_decode( $data, true );
					$data = maybe_unserialize( $data );

				}

				// Only if there is data
				if ( !empty( $data ) || is_array( $data ) ) {

					// Hook before import
					$data = apply_filters( 'radium_theme_import_theme_options', $data );

					update_option( $this->theme_option_name, $data );

					$this->flag_as_imported['options'] = true;
				}

	      		do_action( 'radium_importer_after_theme_options_import', $this->active_import, $this->demo_files_path );

      		} else {

	      		wp_die(
      				__( 'Theme options Import file could not be found. Please try again.', 'radium' ),
      				'',
      				array( 'back_link' => true )
      			);
       		}

	    }

	    /**
	     * Available widgets
	     *
	     * Gather site's widgets into array with ID base, name, etc.
	     * Used by export and import functions.
	     *
	     * @since 0.0.2
	     *
	     * @global array $wp_registered_widget_updates
	     * @return array Widget information
	     */
	    function available_widgets() {

	    	global $wp_registered_widget_controls;

	    	$widget_controls = $wp_registered_widget_controls;

	    	$available_widgets = array();

	    	foreach ( $widget_controls as $widget ) {

	    		if ( ! empty( $widget['id_base'] ) && ! isset( $available_widgets[$widget['id_base']] ) ) { // no dupes

	    			$available_widgets[$widget['id_base']]['id_base'] = $widget['id_base'];
	    			$available_widgets[$widget['id_base']]['name'] = $widget['name'];

	    		}

	    	}

	    	return apply_filters( 'radium_theme_import_widget_available_widgets', $available_widgets );

	    }


	    /**
	     * Process import file
	     *
	     * This parses a file and triggers importation of its widgets.
	     *
	     * @since 0.0.2
	     *
	     * @param string $file Path to .wie file uploaded
	     * @global string $widget_import_results
	     */
	    function process_widget_import_file( $file ) {

	    	// File exists?
	    	if ( ! file_exists( $file ) ) {
	    		wp_die(
	    			__( 'Widget Import file could not be found. Please try again.', 'radium' ),
	    			'',
	    			array( 'back_link' => true )
	    		);
	    	}

	    	// Get file contents and decode
	    	$data = file_get_contents( $file );
	    	$data = json_decode( $data );

	    	// Delete import file
	    	//unlink( $file );

	    	// Import the widget data
	    	// Make results available for display on import/export page
	    	$this->widget_import_results = $this->import_widgets( $data );

	    }


	    /**
	     * Import widget JSON data
	     *
	     * @since 0.0.2
	     * @global array $wp_registered_sidebars
	     * @param object $data JSON widget data from .json file
	     * @return array Results array
	     */
	    public function import_widgets( $data ) {

	    	global $wp_registered_sidebars;

	    	// Have valid data?
	    	// If no data or could not decode
	    	if ( empty( $data ) || ! is_object( $data ) ) {
	    		return;
	    	}

	    	// Hook before import
	    	$data = apply_filters( 'radium_theme_import_widget_data', $data );

	    	// Get all available widgets site supports
	    	$available_widgets = $this->available_widgets();

	    	// Get all existing widget instances
	    	$widget_instances = array();
	    	foreach ( $available_widgets as $widget_data ) {
	    		$widget_instances[$widget_data['id_base']] = get_option( 'widget_' . $widget_data['id_base'] );
	    	}

	    	// Begin results
	    	$results = array();

	    	// Loop import data's sidebars
	    	foreach ( $data as $sidebar_id => $widgets ) {

	    		// Skip inactive widgets
	    		// (should not be in export file)
	    		if ( 'wp_inactive_widgets' == $sidebar_id ) {
	    			continue;
	    		}

	    		// Check if sidebar is available on this site
	    		// Otherwise add widgets to inactive, and say so
	    		if ( isset( $wp_registered_sidebars[$sidebar_id] ) ) {
	    			$sidebar_available = true;
	    			$use_sidebar_id = $sidebar_id;
	    			$sidebar_message_type = 'success';
	    			$sidebar_message = '';
	    		} else {
	    			$sidebar_available = false;
	    			$use_sidebar_id = 'wp_inactive_widgets'; // add to inactive if sidebar does not exist in theme
	    			$sidebar_message_type = 'error';
	    			$sidebar_message = __( 'Sidebar does not exist in theme (using Inactive)', 'radium' );
	    		}

	    		// Result for sidebar
	    		$results[$sidebar_id]['name'] = ! empty( $wp_registered_sidebars[$sidebar_id]['name'] ) ? $wp_registered_sidebars[$sidebar_id]['name'] : $sidebar_id; // sidebar name if theme supports it; otherwise ID
	    		$results[$sidebar_id]['message_type'] = $sidebar_message_type;
	    		$results[$sidebar_id]['message'] = $sidebar_message;
	    		$results[$sidebar_id]['widgets'] = array();

	    		// Loop widgets
	    		foreach ( $widgets as $widget_instance_id => $widget ) {

	    			$fail = false;

	    			// Get id_base (remove -# from end) and instance ID number
	    			$id_base = preg_replace( '/-[0-9]+$/', '', $widget_instance_id );
	    			$instance_id_number = str_replace( $id_base . '-', '', $widget_instance_id );

	    			// Does site support this widget?
	    			if ( ! $fail && ! isset( $available_widgets[$id_base] ) ) {
	    				$fail = true;
	    				$widget_message_type = 'error';
	    				$widget_message = __( 'Site does not support widget', 'radium' ); // explain why widget not imported
	    			}

	    			// Filter to modify settings before import
	    			// Do before identical check because changes may make it identical to end result (such as URL replacements)
	    			$widget = apply_filters( 'radium_theme_import_widget_settings', $widget );

	    			// Does widget with identical settings already exist in same sidebar?
	    			if ( ! $fail && isset( $widget_instances[$id_base] ) ) {

	    				// Get existing widgets in this sidebar
	    				$sidebars_widgets = get_option( 'sidebars_widgets' );
	    				$sidebar_widgets = isset( $sidebars_widgets[$use_sidebar_id] ) ? $sidebars_widgets[$use_sidebar_id] : array(); // check Inactive if that's where will go

	    				// Loop widgets with ID base
	    				$single_widget_instances = ! empty( $widget_instances[$id_base] ) ? $widget_instances[$id_base] : array();
	    				foreach ( $single_widget_instances as $check_id => $check_widget ) {

	    					// Is widget in same sidebar and has identical settings?
	    					if ( in_array( "$id_base-$check_id", $sidebar_widgets ) && (array) $widget == $check_widget ) {

	    						$fail = true;
	    						$widget_message_type = 'warning';
	    						$widget_message = __( 'Widget already exists', 'radium' ); // explain why widget not imported

	    						break;

	    					}

	    				}

	    			}

	    			// No failure
	    			if ( ! $fail ) {

	    				// Add widget instance
	    				$single_widget_instances = get_option( 'widget_' . $id_base ); // all instances for that widget ID base, get fresh every time
	    				$single_widget_instances = ! empty( $single_widget_instances ) ? $single_widget_instances : array( '_multiwidget' => 1 ); // start fresh if have to
	    				$single_widget_instances[] = (array) $widget; // add it

    					// Get the key it was given
    					end( $single_widget_instances );
    					$new_instance_id_number = key( $single_widget_instances );

    					// If key is 0, make it 1
    					// When 0, an issue can occur where adding a widget causes data from other widget to load, and the widget doesn't stick (reload wipes it)
    					if ( '0' === strval( $new_instance_id_number ) ) {
    						$new_instance_id_number = 1;
    						$single_widget_instances[$new_instance_id_number] = $single_widget_instances[0];
    						unset( $single_widget_instances[0] );
    					}

    					// Move _multiwidget to end of array for uniformity
    					if ( isset( $single_widget_instances['_multiwidget'] ) ) {
    						$multiwidget = $single_widget_instances['_multiwidget'];
    						unset( $single_widget_instances['_multiwidget'] );
    						$single_widget_instances['_multiwidget'] = $multiwidget;
    					}

    					// Update option with new widget
    					update_option( 'widget_' . $id_base, $single_widget_instances );

	    				// Assign widget instance to sidebar
	    				$sidebars_widgets = get_option( 'sidebars_widgets' ); // which sidebars have which widgets, get fresh every time
	    				$new_instance_id = $id_base . '-' . $new_instance_id_number; // use ID number from new widget instance
	    				$sidebars_widgets[$use_sidebar_id][] = $new_instance_id; // add new instance to sidebar
	    				update_option( 'sidebars_widgets', $sidebars_widgets ); // save the amended data

	    				// Success message
	    				if ( $sidebar_available ) {
	    					$widget_message_type = 'success';
	    					$widget_message = __( 'Imported', 'radium' );
	    				} else {
	    					$widget_message_type = 'warning';
	    					$widget_message = __( 'Imported to Inactive', 'radium' );
	    				}

	    			}

	    			// Result for widget instance
	    			$results[$sidebar_id]['widgets'][$widget_instance_id]['name'] = isset( $available_widgets[$id_base]['name'] ) ? $available_widgets[$id_base]['name'] : $id_base; // widget name or ID if name not available (not supported by site)
	    			$results[$sidebar_id]['widgets'][$widget_instance_id]['title'] = $widget->title ? $widget->title : __( 'No Title', 'radium' ); // show "No Title" if widget instance is untitled
	    			$results[$sidebar_id]['widgets'][$widget_instance_id]['message_type'] = $widget_message_type;
	    			$results[$sidebar_id]['widgets'][$widget_instance_id]['message'] = $widget_message;

	    		}

	    	}

			$this->flag_as_imported['widgets'] = true;

	    	// Hook after import
	    	do_action( 'radium_theme_import_widget_after_import' );

	    	// Return results
	    	return apply_filters( 'radium_theme_import_widget_results', $results );

	    }

	    /**
	     * Helper function to return option tree decoded strings
	     *
	     * @return    string
	     *
	     * @access    public
	     * @since     0.0.3
	     * @updated   0.0.3.1
	     */
	    public function optiontree_decode( $value ) {
			
			$func = 'base64' . '_decode';
			$prepared_data = maybe_unserialize( $func( $value ) );
			
			return $prepared_data;

	    }

	}//class

}//function_exists
?>
