/wp-content/plugins/ml-slider/ml-slider.php

<?php

/*

 * Meta Slider. Slideshow plugin for WordPress.

 *

 * Plugin Name: Meta Slider

 * Plugin URI:  https://www.metaslider.com

 * Description: Easy to use slideshow plugin. Create SEO optimised responsive slideshows with Nivo Slider, Flex Slider, Coin Slider and Responsive Slides.

 * Version:     3.3.6

 * Author:      Matcha Labs

 * Author URI:  https://www.metaslider.com

 * License:     GPL-2.0+

 * Copyright:   2014 Matcha Labs LTD

 *

 * Text Domain: ml-slider

 * Domain Path: /languages

 */



if ( ! defined( 'ABSPATH' ) ) {

    exit; // disable direct access

}



if ( ! class_exists( 'MetaSliderPlugin' ) ) :



/**

 * Register the plugin.

 *

 * Display the administration panel, insert JavaScript etc.

 */

class MetaSliderPlugin {



    /**

     * @var string

     */

    public $version = '3.3.6';





    /**

     * @var MetaSlider

     */

    public $slider = null;





    /**

     * Init

     */

    public static function init() {



        $metaslider = new self();



    }





    /**

     * Constructor

     */

    public function __construct() {



        $this->define_constants();

        $this->includes();

        $this->setup_actions();

        $this->setup_filters();

        $this->setup_shortcode();

        $this->register_slide_types();



    }





    /**

     * Define Meta Slider constants

     */

    private function define_constants() {



        define( 'METASLIDER_VERSION',    $this->version );

        define( 'METASLIDER_BASE_URL',   trailingslashit( plugins_url( 'ml-slider' ) ) );

        define( 'METASLIDER_ASSETS_URL', trailingslashit( METASLIDER_BASE_URL . 'assets' ) );

        define( 'METASLIDER_PATH',       plugin_dir_path( __FILE__ ) );



    }





    /**

     * All Meta Slider classes

     */

    private function plugin_classes() {



        return array(

            'metaslider'             => METASLIDER_PATH . 'inc/slider/metaslider.class.php',

            'metacoinslider'         => METASLIDER_PATH . 'inc/slider/metaslider.coin.class.php',

            'metaflexslider'         => METASLIDER_PATH . 'inc/slider/metaslider.flex.class.php',

            'metanivoslider'         => METASLIDER_PATH . 'inc/slider/metaslider.nivo.class.php',

            'metaresponsiveslider'   => METASLIDER_PATH . 'inc/slider/metaslider.responsive.class.php',

            'metaslide'              => METASLIDER_PATH . 'inc/slide/metaslide.class.php',

            'metaimageslide'         => METASLIDER_PATH . 'inc/slide/metaslide.image.class.php',

            'metasliderimagehelper'  => METASLIDER_PATH . 'inc/metaslider.imagehelper.class.php',

            'metaslidersystemcheck'  => METASLIDER_PATH . 'inc/metaslider.systemcheck.class.php',

            'metaslider_widget'      => METASLIDER_PATH . 'inc/metaslider.widget.class.php',

            'simple_html_dom'        => METASLIDER_PATH . 'inc/simple_html_dom.php'

        );



    }





    /**

     * Load required classes

     */

    private function includes() {



        $autoload_is_disabled = defined( 'METASLIDER_AUTOLOAD_CLASSES' ) && METASLIDER_AUTOLOAD_CLASSES === false;



        if ( function_exists( "spl_autoload_register" ) && ! ( $autoload_is_disabled ) ) {



            // >= PHP 5.2 - Use auto loading

            if ( function_exists( "__autoload" ) ) {

                spl_autoload_register( "__autoload" );

            }



            spl_autoload_register( array( $this, 'autoload' ) );



        } else {



            // < PHP5.2 - Require all classes

            foreach ( $this->plugin_classes() as $id => $path ) {

                if ( is_readable( $path ) && ! class_exists( $id ) ) {

                    require_once( $path );

                }

            }



        }



    }





    /**

     * Autoload Meta Slider classes to reduce memory consumption

     */

    public function autoload( $class ) {



        $classes = $this->plugin_classes();



        $class_name = strtolower( $class );



        if ( isset( $classes[$class_name] ) && is_readable( $classes[$class_name] ) ) {

            require_once( $classes[$class_name] );

        }



    }





    /**

     * Register the [metaslider] shortcode.

     */

    private function setup_shortcode() {



        add_shortcode( 'metaslider', array( $this, 'register_shortcode' ) );

        add_shortcode( 'ml-slider', array( $this, 'register_shortcode' ) ); // backwards compatibility



    }





    /**

     * Hook Meta Slider into WordPress

     */

    private function setup_actions() {



        add_action( 'admin_menu', array( $this, 'register_admin_menu' ), 9553 );

        add_action( 'init', array( $this, 'register_post_type' ) );

        add_action( 'init', array( $this, 'register_taxonomy' ) );

        add_action( 'init', array( $this, 'load_plugin_textdomain' ) );

        add_action( 'admin_footer', array( $this, 'admin_footer' ), 11 );

        add_action( 'widgets_init', array( $this, 'register_metaslider_widget' ) );



        add_action( 'admin_post_metaslider_preview', array( $this, 'do_preview' ) );

        add_action( 'admin_post_metaslider_hide_go_pro_page', array( $this, 'hide_go_pro_page' ) );

        add_action( 'admin_post_metaslider_switch_view', array( $this, 'switch_view' ) );

        add_action( 'admin_post_metaslider_delete_slide', array( $this, 'delete_slide' ) );

        add_action( 'admin_post_metaslider_delete_slider', array( $this, 'delete_slider' ) );

        add_action( 'admin_post_metaslider_create_slider', array( $this, 'create_slider' ) );

        add_action( 'admin_post_metaslider_update_slider', array( $this, 'update_slider' ) );



    }





    /**

     * Hook Meta Slider into WordPress

     */

    private function setup_filters() {



        add_filter( 'media_upload_tabs', array( $this, 'custom_media_upload_tab_name' ), 998 );

        add_filter( 'media_view_strings', array( $this, 'custom_media_uploader_tabs' ), 5 );

        add_filter( 'media_buttons_context', array( $this, 'insert_metaslider_button' ) );



        // add 'go pro' link to plugin options

        $plugin = plugin_basename( __FILE__ );



        add_filter( "plugin_action_links_{$plugin}", array( $this, 'upgrade_to_pro_link' ) );



        // html5 compatibility for stylesheets enqueued within <body>

        add_filter( 'style_loader_tag', array( $this, 'add_property_attribute_to_stylesheet_links' ), 11, 2 );



    }





    /**

     * Register Meta Slider widget

     */

    public function register_metaslider_widget() {



        register_widget( 'MetaSlider_Widget' );



    }





    /**

     * Register ML Slider post type

     */

    public function register_post_type() {



        register_post_type( 'ml-slider', array(

                'query_var' => false,

                'rewrite' => false,

                'public' => true,

                'exclude_from_search' => true,

                'publicly_queryable' => false,

                'show_in_nav_menus' => false,

                'show_ui' => false,

                'labels' => array(

                    'name' => 'Meta Slider'

                )

            )

        );



    }





    /**

     * Register taxonomy to store slider => slides relationship

     */

    public function register_taxonomy() {



        register_taxonomy( 'ml-slider', 'attachment', array(

                'hierarchical' => true,

                'public' => false,

                'query_var' => false,

                'rewrite' => false

            )

        );



    }





    /**

     * Register our slide types

     */

    private function register_slide_types() {



        $image = new MetaImageSlide();



    }





    /**

     * Add the menu page

     */

    public function register_admin_menu() {

        global $user_ID;



        $title = apply_filters( 'metaslider_menu_title', 'Meta Slider' );



        $capability = apply_filters( 'metaslider_capability', 'edit_others_posts' );



        $page = add_menu_page( $title, $title, $capability, 'metaslider', array(

                $this, 'render_admin_page'

            ), METASLIDER_ASSETS_URL . 'metaslider/matchalabs.png', 9501 );



        // ensure our JavaScript is only loaded on the Meta Slider admin page

        add_action( 'admin_print_scripts-' . $page, array( $this, 'register_admin_scripts' ) );

        add_action( 'admin_print_styles-' . $page, array( $this, 'register_admin_styles' ) );

        add_action( 'load-' . $page, array( $this, 'help_tab' ) );



        if ( ! is_plugin_active( 'ml-slider-pro/ml-slider-pro.php' ) && get_user_meta( $user_ID, "metaslider_hide_go_pro", true ) !== 'true' ) {



            $page = add_submenu_page(

                'metaslider',

                __( 'Go Pro!', 'ml-slider' ),

                __( 'Go Pro!', 'ml-slider' ),

                $capability,

                'metaslider-go-pro',

                array( $this, 'go_pro_page' )

            );



            add_action( 'admin_print_styles-' . $page, array( $this, 'register_admin_styles' ) );



        }



    }



    /**

     * Go Pro page content

     */

    public function go_pro_page() {



        $upgrade_link = esc_url( add_query_arg(

            array(

                'utm_source' => 'lite',

                'utm_medium' => 'nag',

                'utm_campaign' => 'pro'

            ), 'http://www.metaslider.com/upgrade/' ) );



        $link = apply_filters( 'metaslider_hoplink', $upgrade_link );



        $hide_link = '<a href="' . admin_url( "admin-post.php?action=metaslider_hide_go_pro_page" ) . '">Hide this page</a>';

        $gopro_link = "<a class='button button-primary' href='{$link}' target='_blank'>Find out more</a>";

        $support_link = '<a href="https://wordpress.org/support/plugin/ml-slider">Support</a>';

        $documentation_link = '<a href="http://www.metaslider.com/documentation/">Documentation</a>';



        ?>

            <h2>Supercharge Your Sliders with Meta Slider Pro!</h2>



            <ul class='metaslider_gopro'>

                <li>Create <b>animated HTML slides</b> using the drag &amp; drop layer editor (WYSIWYG)</li>

                <li>Insert <b>YouTube</b> and <b>Vimeo</b> videos into your slideshows</li>

                <li>Automatically populate your slideshows with your <b>latest blog posts</b> or custom post types</li>

                <li>Customize the look of your slideshows with the <b>Theme Editor</b> (25+ settings including custom arrow images, dot colors and caption styling)</li>

                <li>Give your slideshows a gallery feel with <b>thumbnail navigation</b></li>

                <li>Feature <b>WooCommerce</b> products in your slideshows</li>

                <li>Show your latest events from <b>The Events Calendar</b> plugin</li>

                <li><b>Easy to install</B> - Meta Slider Pro installs as a seperate plugin alongside Meta Slider and seamlessly adds in the new functionality</li>

                <li><b>Easy to update</b> - new updates will be displayed on your plugins page (just like your other plugins!)</li>

                <li>Upgrade with confidence with our <b>30 day no questions money back guarantee</b></li>

                <li>Meta Slider Pro users receive <b>priority support</b> from our dedicated team, we’re on hand to help you get the most of Meta Slider</li>

            </ul>



            <p><?php echo $gopro_link; ?></p>

            <p><?php echo $support_link; ?> <?php echo $documentation_link; ?></p>

            <p><em>Don't want to see this? <?php echo $hide_link; ?></em></p>

        <?php



    }



    /**

     *  Store the users preference to hide the go pro page.

     */

    public function hide_go_pro_page() {

        global $user_ID;



        if ( ! get_user_meta( $user_ID, "metaslider_hide_go_pro" ) ) {

            add_user_meta( $user_ID, "metaslider_hide_go_pro", "true" );

        }



        wp_redirect( admin_url( "admin.php?page=metaslider" ) );



    }





    /**

     * Shortcode used to display slideshow

     *

     * @return string HTML output of the shortcode

     */

    public function register_shortcode( $atts ) {



        extract( shortcode_atts( array(

            'id' => false,

            'restrict_to' => false

        ), $atts, 'metaslider' ) );





        if ( ! $id ) {

            return false;

        }



        // handle [metaslider id=123 restrict_to=home]

        if ($restrict_to && $restrict_to == 'home' && ! is_front_page()) {

            return;

        }



        if ($restrict_to && $restrict_to != 'home' && ! is_page( $restrict_to ) ) {

            return;

        }



        // we have an ID to work with

        $slider = get_post( $id );



        // check the slider is published and the ID is correct

        if ( ! $slider || $slider->post_status != 'publish' || $slider->post_type != 'ml-slider' ) {

            return "<!-- meta slider {$atts['id']} not found -->";

        }



        // lets go

        $this->set_slider( $id, $atts );

        $this->slider->enqueue_scripts();



        return $this->slider->render_public_slides();



    }





    /**

     * Initialise translations

     */

    public function load_plugin_textdomain() {



        load_plugin_textdomain( 'ml-slider', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );



    }





    /**

     * Add the help tab to the screen.

     */

    public function help_tab() {



        $screen = get_current_screen();



        // documentation tab

        $screen->add_help_tab( array(

                'id'    => 'documentation',

                'title' => __( 'Documentation', 'ml-slider' ),

                'content'   => "<p><a href='http://www.metaslider.com/documentation/' target='blank'>Meta Slider Documentation</a></p>",

            )

        );



    }





    /**

     * Rehister admin styles

     */

    public function register_admin_styles() {



        wp_enqueue_style( 'metaslider-admin-styles', METASLIDER_ASSETS_URL . 'metaslider/admin.css', false, METASLIDER_VERSION );

        wp_enqueue_style( 'metaslider-colorbox-styles', METASLIDER_ASSETS_URL . 'colorbox/colorbox.css', false, METASLIDER_VERSION );

        wp_enqueue_style( 'metaslider-tipsy-styles', METASLIDER_ASSETS_URL . 'tipsy/tipsy.css', false, METASLIDER_VERSION );



        do_action( 'metaslider_register_admin_styles' );



    }





    /**

     * Register admin JavaScript

     */

    public function register_admin_scripts() {



        // media library dependencies

        wp_enqueue_media();



        // plugin dependencies

        wp_enqueue_script( 'jquery-ui-core', array( 'jquery' ) );

        wp_enqueue_script( 'jquery-ui-sortable', array( 'jquery', 'jquery-ui-core' ) );

        wp_enqueue_script( 'metaslider-colorbox', METASLIDER_ASSETS_URL . 'colorbox/jquery.colorbox-min.js', array( 'jquery' ), METASLIDER_VERSION );

        wp_enqueue_script( 'metaslider-tipsy', METASLIDER_ASSETS_URL . 'tipsy/jquery.tipsy.js', array( 'jquery' ), METASLIDER_VERSION );

        wp_enqueue_script( 'metaslider-admin-script', METASLIDER_ASSETS_URL . 'metaslider/admin.js', array( 'jquery', 'metaslider-tipsy', 'media-upload' ), METASLIDER_VERSION );



        wp_dequeue_script( 'link' ); // WP Posts Filter Fix (Advanced Settings not toggling)

        wp_dequeue_script( 'ai1ec_requirejs' ); // All In One Events Calendar Fix (Advanced Settings not toggling)



        $this->localize_admin_scripts();



        do_action( 'metaslider_register_admin_scripts' );



    }





    /**

     * Localise admin script

     */

    public function localize_admin_scripts() {



        wp_localize_script( 'metaslider-admin-script', 'metaslider', array(

                'url' => __( "URL", "ml-slider" ),

                'caption' => __( "Caption", "ml-slider" ),

                'new_window' => __( "New Window", "ml-slider" ),

                'confirm' => __( "Are you sure?", "ml-slider" ),

                'ajaxurl' => admin_url( 'admin-ajax.php' ),

                'change_image' => __( "Select replacement image", "ml-slider"),

                'resize_nonce' => wp_create_nonce( 'metaslider_resize' ),

                'addslide_nonce' => wp_create_nonce( 'metaslider_addslide' ),

                'changeslide_nonce' => wp_create_nonce( 'metaslider_changeslide' ),

                'iframeurl' => admin_url( 'admin-post.php?action=metaslider_preview' ),

                'useWithCaution' => __( "Caution: This setting is for advanced developers only. If you're unsure, leave it checked.", "ml-slider" )

            )

        );



    }





    /**

     * Outputs a blank page containing a slideshow preview (for use in the 'Preview' iFrame)

     */

    public function do_preview() {



        remove_action('wp_footer', 'wp_admin_bar_render', 1000);



        if ( isset( $_GET['slider_id'] ) && absint( $_GET['slider_id'] ) > 0 ) {

            $id = absint( $_GET['slider_id'] );



            ?>

            <!DOCTYPE html>

            <html>

                <head>

                    <style type='text/css'>

                        body, html {

                            overflow: hidden;

                            margin: 0;

                            padding: 0;

                        }

                    </style>

                    <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />

                    <meta http-equiv="Pragma" content="no-cache" />

                    <meta http-equiv="Expires" content="0" />

                </head>

                <body>

                    <?php echo do_shortcode("[metaslider id={$id}]"); ?>

                    <?php wp_footer(); ?>

                </body>

            </html>

            <?php

        }



        die();



    }





    /**

     * Check our WordPress installation is compatible with Meta Slider

     */

    public function do_system_check() {



        $systemCheck = new MetaSliderSystemCheck();

        $systemCheck->check();



    }





    /**

     * Update the tab options in the media manager

     */

    public function custom_media_uploader_tabs( $strings ) {



        //update strings

        if ( ( isset( $_GET['page'] ) && $_GET['page'] == 'metaslider' ) ) {

            $strings['insertMediaTitle'] = __( "Image", "ml-slider" );

            $strings['insertIntoPost'] = __( "Add to slider", "ml-slider" );

            // remove options



            $strings_to_remove = array(

                'createVideoPlaylistTitle',

                'createGalleryTitle',

                'insertFromUrlTitle',

                'createPlaylistTitle'

            );



            foreach ($strings_to_remove as $string) {

                if (isset($strings[$string])) {

                    unset($strings[$string]);

                }

            }

        }



        return $strings;



    }





    /**

     * Add extra tabs to the default wordpress Media Manager iframe

     *

     * @var array existing media manager tabs

     */

    public function custom_media_upload_tab_name( $tabs ) {



        // restrict our tab changes to the meta slider plugin page

        if ( isset( $_GET['page'] ) && $_GET['page'] == 'metaslider' ) {



            if ( isset( $tabs['nextgen'] ) ) {

                unset( $tabs['nextgen'] );

            }



        }



        return $tabs;



    }





    /**

     * Set the current slider

     */

    public function set_slider( $id, $shortcode_settings = array() ) {



        $type = 'flex';



        if ( isset( $shortcode_settings['type'] ) ) {

            $type = $shortcode_settings['type'];

        } else if ( $settings = get_post_meta( $id, 'ml-slider_settings', true ) ) {

            if ( is_array( $settings ) && isset( $settings['type'] ) ) {

                $type = $settings['type'];

            }

        }



        if ( ! in_array( $type, array( 'flex', 'coin', 'nivo', 'responsive' ) ) ) {

            $type = 'flex';

        }



        $this->slider = $this->load_slider( $type, $id, $shortcode_settings );



    }





    /**

     * Create a new slider based on the sliders type setting

     */

    private function load_slider( $type, $id, $shortcode_settings ) {



        switch ( $type ) {

            case( 'coin' ):

                return new MetaCoinSlider( $id, $shortcode_settings );

            case( 'flex' ):

                return new MetaFlexSlider( $id, $shortcode_settings );

            case( 'nivo' ):

                return new MetaNivoSlider( $id, $shortcode_settings );

            case( 'responsive' ):

                return new MetaResponsiveSlider( $id, $shortcode_settings );

            default:

                return new MetaFlexSlider( $id, $shortcode_settings );



        }

    }





    /**

     *

     */

    public function update_slider() {



        check_admin_referer( "metaslider_update_slider" );



        $capability = apply_filters( 'metaslider_capability', 'edit_others_posts' );



        if ( ! current_user_can( $capability ) ) {

            return;

        }



        $slider_id = absint( $_POST['slider_id'] );



        if ( ! $slider_id ) {

            return;

        }



        // update settings

        if ( isset( $_POST['settings'] ) ) {



            $new_settings = $_POST['settings'];



            $old_settings = get_post_meta( $slider_id, 'ml-slider_settings', true );



            // convert submitted checkbox values from 'on' or 'off' to boolean values

            $checkboxes = apply_filters( "metaslider_checkbox_settings", array( 'noConflict', 'fullWidth', 'hoverPause', 'links', 'reverse', 'random', 'printCss', 'printJs', 'smoothHeight', 'center', 'carouselMode', 'autoPlay' ) );



            foreach ( $checkboxes as $checkbox ) {

                if ( isset( $new_settings[$checkbox] ) && $new_settings[$checkbox] == 'on' ) {

                    $new_settings[$checkbox] = "true";

                } else {

                    $new_settings[$checkbox] = "false";

                }

            }



            $settings = array_merge( (array)$old_settings, $new_settings );



            // update the slider settings

            update_post_meta( $slider_id, 'ml-slider_settings', $settings );



        }



        // update slideshow title

        if ( isset( $_POST['title'] ) ) {



            $slide = array(

                'ID' => $slider_id,

                'post_title' => esc_html( $_POST['title'] )

            );



            wp_update_post( $slide );



        }



        // update individual slides

        if ( isset( $_POST['attachment'] ) ) {



            foreach ( $_POST['attachment'] as $slide_id => $fields ) {

                do_action( "metaslider_save_{$fields['type']}_slide", $slide_id, $slider_id, $fields );

            }



        }



    }





    /**

     * Delete a slide. This doesn't actually remove the slide from WordPress, simply untags

     * it from the slide taxonomy.

     */

    public function delete_slide() {



        // check nonce

        check_admin_referer( "metaslider_delete_slide" );



        $capability = apply_filters( 'metaslider_capability', 'edit_others_posts' );



        if ( ! current_user_can( $capability ) ) {

            return;

        }



        $slide_id = absint( $_GET['slide_id'] );

        $slider_id = absint( $_GET['slider_id'] );



        // Get the existing terms and only keep the ones we don't want removed

        $new_terms = array();

        $current_terms = wp_get_object_terms( $slide_id, 'ml-slider', array( 'fields' => 'ids' ) );

        $term = get_term_by( 'name', $slider_id, 'ml-slider' );



        foreach ( $current_terms as $current_term ) {

            if ( $current_term != $term->term_id ) {

                $new_terms[] = absint( $current_term );

            }

        }



        wp_set_object_terms( $slide_id, $new_terms, 'ml-slider' );



        wp_redirect( admin_url( "admin.php?page=metaslider&id={$slider_id}" ) );



    }





    /**

     * Delete a slider (send it to trash)

     */

    public function delete_slider() {



        // check nonce

        check_admin_referer( "metaslider_delete_slider" );



        $capability = apply_filters( 'metaslider_capability', 'edit_others_posts' );



        if ( ! current_user_can( $capability ) ) {

            return;

        }



        $slider_id = absint( $_GET['slider_id'] );



        // send the post to trash

        $id = wp_update_post( array(

                'ID' => $slider_id,

                'post_status' => 'trash'

            )

        );



        $slider_id = $this->find_slider( 'modified', 'DESC' );



        wp_redirect( admin_url( "admin.php?page=metaslider&id={$slider_id}" ) );



    }





    /**

     *

     */

    public function switch_view() {

        global $user_ID;



        $view = $_GET['view'];



        $allowed_views = array('tabs', 'dropdown');



        if ( ! in_array( $view, $allowed_views ) ) {

            return;

        }



        delete_user_meta( $user_ID, "metaslider_view" );



        if ( $view == 'dropdown' ) {

            add_user_meta( $user_ID, "metaslider_view", "dropdown");

        }



        wp_redirect( admin_url( "admin.php?page=metaslider" ) );



    }





    /**

     * Create a new slider

     */

    public function create_slider() {



        // check nonce

        check_admin_referer( "metaslider_create_slider" );



        $capability = apply_filters( 'metaslider_capability', 'edit_others_posts' );



        if ( ! current_user_can( $capability ) ) {

            return;

        }



        $defaults = array();



        // if possible, take a copy of the last edited slider settings in place of default settings

        if ( $last_modified = $this->find_slider( 'modified', 'DESC' ) ) {

            $defaults = get_post_meta( $last_modified, 'ml-slider_settings', true );

        }



        // insert the post

        $id = wp_insert_post( array(

                'post_title' => __( "New Slider", "ml-slider" ),

                'post_status' => 'publish',

                'post_type' => 'ml-slider'

            )

        );



        // use the default settings if we can't find anything more suitable.

        if ( empty( $defaults ) ) {

            $slider = new MetaSlider( $id, array() );

            $defaults = $slider->get_default_parameters();

        }



        // insert the post meta

        add_post_meta( $id, 'ml-slider_settings', $defaults, true );



        // create the taxonomy term, the term is the ID of the slider itself

        wp_insert_term( $id, 'ml-slider' );



        wp_redirect( admin_url( "admin.php?page=metaslider&id={$id}" ) );



    }







    /**

     * Find a single slider ID. For example, last edited, or first published.

     *

     * @param string $orderby field to order.

     * @param string $order direction (ASC or DESC).

     * @return int slider ID.

     */

    private function find_slider( $orderby, $order ) {



        $args = array(

            'force_no_custom_order' => true,

            'post_type' => 'ml-slider',

            'num_posts' => 1,

            'post_status' => 'publish',

            'suppress_filters' => 1, // wpml, ignore language filter

            'orderby' => $orderby,

            'order' => $order

        );



        $the_query = new WP_Query( $args );



        while ( $the_query->have_posts() ) {

            $the_query->the_post();

            return $the_query->post->ID;

        }



        wp_reset_query();



        return false;



    }





    /**

     * Get sliders. Returns a nicely formatted array of currently

     * published sliders.

     *

     * @param string $sort_key

     * @return array all published sliders

     */

    public function all_meta_sliders( $sort_key = 'date' ) {



        $sliders = array();



        // list the tabs

        $args = array(

            'post_type' => 'ml-slider',

            'post_status' => 'publish',

            'orderby' => $sort_key,

            'suppress_filters' => 1, // wpml, ignore language filter

            'order' => 'ASC',

            'posts_per_page' => -1

        );



        $args = apply_filters( 'metaslider_all_meta_sliders_args', $args );



        // WP_Query causes issues with other plugins using admin_footer to insert scripts

        // use get_posts instead

        $all_sliders = get_posts( $args );



        foreach( $all_sliders as $slideshow ) {



            $active = $this->slider && ( $this->slider->id == $slideshow->ID ) ? true : false;



            $sliders[] = array(

                'active' => $active,

                'title' => $slideshow->post_title,

                'id' => $slideshow->ID

            );



        }



        return $sliders;



    }





    /**

     * Compare array values

     *

     * @param array $elem1

     * @param array $elem2

     * @return bool

     */

    private function compare_elems( $elem1, $elem2 ) {



        return $elem1['priority'] > $elem2['priority'];



    }





    /**

     *

     * @param array $aFields - array of field to render

     * @return string

     */

    public function build_settings_rows( $aFields ) {



        // order the fields by priority

        uasort( $aFields, array( $this, "compare_elems" ) );



        $return = "";



        // loop through the array and build the settings HTML

        foreach ( $aFields as $id => $row ) {

            // checkbox input type

            if ( $row['type'] == 'checkbox' ) {

                $return .= "<tr><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><input class='option {$row['class']} {$id}' type='checkbox' name='settings[{$id}]' {$row['checked']} />";



                if ( isset( $row['after'] ) ) {

                    $return .= "<span class='after'>{$row['after']}</span>";

                }



                $return .= "</td></tr>";

            }



            // navigation row

            if ( $row['type'] == 'navigation' ) {

                $navigation_row = "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><ul>";



                foreach ( $row['options'] as $k => $v ) {



                    if ( $row['value'] === true && $k === 'true' ) {

                        $checked = checked( true, true, false );

                    } else if ( $row['value'] === false && $k === 'false' ) {

                        $checked = checked( true, true, false );

                    } else {

                        $checked = checked( $k, $row['value'], false );

                    }



                    $disabled = $k == 'thumbnails' ? 'disabled' : '';

                    $navigation_row .= "<li><label><input type='radio' name='settings[{$id}]' value='{$k}' {$checked} {$disabled}/>{$v['label']}</label></li>";

                }



                $navigation_row .= "</ul></td></tr>";



                $return .= apply_filters( 'metaslider_navigation_options', $navigation_row, $this->slider );

            }



            // navigation row

            if ( $row['type'] == 'radio' ) {

                $navigation_row = "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><ul>";



                foreach ( $row['options'] as $k => $v ) {

                    $checked = checked( $k, $row['value'], false );

                    $class = isset( $v['class'] ) ? $v['class'] : "";

                    $navigation_row .= "<li><label><input type='radio' name='settings[{$id}]' value='{$k}' {$checked} class='radio {$class}'/>{$v['label']}</label></li>";

                }



                $navigation_row .= "</ul></td></tr>";



                $return .= apply_filters( 'metaslider_navigation_options', $navigation_row, $this->slider );

            }



            // header/divider row

            if ( $row['type'] == 'divider' ) {

                $return .= "<tr class='{$row['type']}'><td colspan='2' class='divider'><b>{$row['value']}</b></td></tr>";

            }



            // slideshow select row

            if ( $row['type'] == 'slider-lib' ) {

                $return .= "<tr class='{$row['type']}'><td colspan='2' class='slider-lib-row'>";



                foreach ( $row['options'] as $k => $v ) {

                    $checked = checked( $k, $row['value'], false );

                    $return .= "<input class='select-slider' id='{$k}' rel='{$k}' type='radio' name='settings[type]' value='{$k}' {$checked} />

                    <label for='{$k}'>{$v['label']}</label>";

                }



                $return .= "</td></tr>";

            }



            // number input type

            if ( $row['type'] == 'number' ) {

                $return .= "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><input class='option {$row['class']} {$id}' type='number' min='{$row['min']}' max='{$row['max']}' step='{$row['step']}' name='settings[{$id}]' value='" . absint( $row['value'] ) . "' /><span class='after'>{$row['after']}</span></td></tr>";

            }



            // select drop down

            if ( $row['type'] == 'select' ) {

                $return .= "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><select class='option {$row['class']} {$id}' name='settings[{$id}]'>";

                foreach ( $row['options'] as $k => $v ) {

                    $selected = selected( $k, $row['value'], false );

                    $return .= "<option class='{$v['class']}' value='{$k}' {$selected}>{$v['label']}</option>";

                }

                $return .= "</select></td></tr>";

            }



            // theme drop down

            if ( $row['type'] == 'theme' ) {

                $return .= "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><select class='option {$row['class']} {$id}' name='settings[{$id}]'>";

                $themes = "";



                foreach ( $row['options'] as $k => $v ) {

                    $selected = selected( $k, $row['value'], false );

                    $themes .= "<option class='{$v['class']}' value='{$k}' {$selected}>{$v['label']}</option>";

                }



                $return .= apply_filters( 'metaslider_get_available_themes', $themes, $this->slider->get_setting( 'theme' ) );



                $return .= "</select></td></tr>";

            }



            // text input type

            if ( $row['type'] == 'text' ) {

                $return .= "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><input class='option {$row['class']} {$id}' type='text' name='settings[{$id}]' value='" . esc_attr( $row['value'] ) . "' /></td></tr>";

            }



            // text input type

            if ( $row['type'] == 'textarea' ) {

                $return .= "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\" colspan='2'>{$row['label']}</td></tr><tr><td colspan='2'><textarea class='option {$row['class']} {$id}' name='settings[{$id}]' />{$row['value']}</textarea></td></tr>";

            }



            // text input type

            if ( $row['type'] == 'title' ) {

                $return .= "<tr class='{$row['type']}'><td class='tipsy-tooltip' title=\"{$row['helptext']}\">{$row['label']}</td><td><input class='option {$row['class']} {$id}' type='text' name='{$id}' value='" . esc_attr( $row['value'] ) . "' /></td></tr>";

            }

        }



        return $return;



    }





    /**

     * Return an indexed array of all easing options

     *

     * @return array

     */

    private function get_easing_options() {



        $options = array(

            'linear', 'swing', 'jswing', 'easeInQuad', 'easeOutQuad', 'easeInOutQuad',

            'easeInCubic', 'easeOutCubic', 'easeInOutCubic', 'easeInQuart',

            'easeOutQuart', 'easeInOutQuart', 'easeInQuint', 'easeOutQuint',

            'easeInOutQuint', 'easeInSine', 'easeOutSine', 'easeInOutSine',

            'easeInExpo', 'easeOutExpo', 'easeInOutExpo', 'easeInCirc', 'easeOutCirc',

            'easeInOutCirc', 'easeInElastic', 'easeOutElastic', 'easeInOutElastic',

            'easeInBack', 'easeOutBack', 'easeInOutBack', 'easeInBounce', 'easeOutBounce',

            'easeInOutBounce'

        );



        foreach ( $options as $option ) {

            $return[$option] = array(

                'label' => ucfirst( preg_replace( '/(\w+)([A-Z])/U', '\\1 \\2', $option ) ),

                'class' => ''

            );

        }



        return $return;



    }



    /**

     * Output the slideshow selector.

     *

     * Show tabs or a dropdown list depending on the users saved preference.

     */

    public function print_slideshow_selector() {

        global $user_ID;



        $add_url = wp_nonce_url( admin_url( "admin-post.php?action=metaslider_create_slider" ), "metaslider_create_slider" );



        if ( $tabs = $this->all_meta_sliders() ) {



            if ( $this->get_view() == 'tabs' ) {



                echo "<div style='display: none;' id='screen-options-switch-view-wrap'>

                <a class='switchview dashicons-before dashicons-randomize tipsy-tooltip' title='" . __("Switch to Dropdown view", "ml-slider") . "' href='" . admin_url( "admin-post.php?action=metaslider_switch_view&view=dropdown") . "'>" . __("Dropdown", "ml-slider") . "</a></div>";



                echo "<h3 class='nav-tab-wrapper'>";



                foreach ( $tabs as $tab ) {



                    if ( $tab['active'] ) {

                        echo "<div class='nav-tab nav-tab-active'><input type='text' name='title'  value='" . esc_attr( $tab['title'] ) . "' onfocus='this.style.width = ((this.value.length + 1) * 9) + \"px\"' /></div>";

                    } else {

                        echo "<a href='?page=metaslider&amp;id={$tab['id']}' class='nav-tab'>" . esc_html( $tab['title'] ) . "</a>";

                    }



                }



                echo "<a href='{$add_url}' id='create_new_tab' class='nav-tab'>+</a>";

                echo "</h3>";



            } else {



                if ( isset( $_GET['add'] ) && $_GET['add'] == 'true' ) {



                    echo "<div id='message' class='updated'><p>" . __( "New slideshow created. Click 'Add Slide' to get started!", "ml-slider" ) . "</p></div>";



                }



                echo "<div style='display: none;' id='screen-options-switch-view-wrap'><a class='switchview dashicons-before dashicons-randomize tipsy-tooltip' title='" . __("Switch to Tab view", "ml-slider") . "' href='" . admin_url( "admin-post.php?action=metaslider_switch_view&view=tabs") . "'>" . __("Tabs", "ml-slider") . "</a></div>";



                echo "<div class='dropdown_container'><label for='select-slider'>" . __("Select Slider", "ml-slider") . ": </label>";

                echo "<select name='select-slider' onchange='if (this.value) window.location.href=this.value'>";



                $tabs = $this->all_meta_sliders( 'title' );



                foreach ( $tabs as $tab ) {



                    $selected = $tab['active'] ? " selected" : "";



                    if ( $tab['active'] ) {



                        $title = $tab['title'];



                    }



                    echo "<option value='?page=metaslider&amp;id={$tab['id']}'{$selected}>{$tab['title']}</option>";



                }



                echo "</select> " . __( 'or', "ml-slider" ) . " ";

                echo "<a href='{$add_url}'>" . __( 'Add New Slideshow', "ml-slider" ) . "</a></div>";



            }

        } else {

            echo "<h3 class='nav-tab-wrapper'>";

            echo "<a href='{$add_url}' id='create_new_tab' class='nav-tab'>+</a>";

            echo "<div class='bubble'>" . __( "Create your first slideshow", "ml-slider" ) . "</div>";

            echo "</h3>";

        }

    }





    /**

     * Return the users saved view preference.

     */

    public function get_view() {

        global $user_ID;



        if ( get_user_meta( $user_ID, "metaslider_view", true ) ) {

            return get_user_meta( $user_ID, "metaslider_view", true );

        }



        return 'tabs';

    }





    /**

     * Render the admin page (tabs, slides, settings)

     */

    public function render_admin_page() {



        // default to the latest slider

        $slider_id = $this->find_slider( 'modified', 'DESC' );



        // load a slider by ID

        if ( isset( $_REQUEST['id'] ) ) {

            $temp_id = absint( $_REQUEST['id'] );



            // check valid post ID

            if ( get_post( $temp_id ) ) {

                $slider_id = $temp_id;

            }

        }



        // finally, set the slider

        if ( $slider_id > 0 ) {

            $this->set_slider( $slider_id );

        }



        $this->upgrade_to_pro_cta();

        $this->do_system_check();



        $slider_id = $this->slider ? $this->slider->id : 0;



        ?>



        <script type='text/javascript'>

            var metaslider_slider_id = <?php echo $slider_id; ?>;

        </script>



        <div class="wrap metaslider">

            <form accept-charset="UTF-8" action="<?php echo admin_url( 'admin-post.php'); ?>" method="post">

                <input type="hidden" name="action" value="metaslider_update_slider">

                <input type="hidden" name="slider_id" value="<?php echo $slider_id; ?>">

                <?php wp_nonce_field( 'metaslider_update_slider' ); ?>



                <?php $this->print_slideshow_selector(); ?>



                <?php if ( ! $this->slider ) return; ?>



                <div id='poststuff'>

                    <div id='post-body' class='metabox-holder columns-2'>



                        <div id='post-body-content'>

                            <div class="left">



                                <?php do_action( "metaslider_admin_table_before", $this->slider->id ); ?>



                                <table class="widefat sortable">

                                    <thead>

                                        <tr>

                                            <th style="width: 100px;">

                                                <h3><?php _e( "Slides", "ml-slider" ) ?></h3>

                                                <?php do_action( "metaslider_admin_table_header_left", $this->slider->id ); ?>

                                            </th>

                                            <th>

                                                <a href='#' class='button alignright add-slide' data-editor='content' title='<?php _e( "Add Slide", "ml-slider" ) ?>'>

                                                    <span class='wp-media-buttons-icon'></span> <?php _e( "Add Slide", "ml-slider" ) ?>

                                                </a>

                                                <?php do_action( "metaslider_admin_table_header_right", $this->slider->id ); ?>

                                            </th>

                                        </tr>

                                    </thead>



                                    <tbody>

                                        <?php

                                            $this->slider->render_admin_slides();

                                        ?>

                                    </tbody>

                                </table>



                                <?php do_action( "metaslider_admin_table_after", $this->slider->id ); ?>



                            </div>

                        </div>



                        <div id="postbox-container-1" class="postbox-container">

                            <div class='right'>

                                <div class="ms-postbox" id="metaslider_configuration">

                                    <div class='configuration'>

                                        <input class='alignright button button-primary' type='submit' name='save' id='ms-save' value='<?php _e( "Save", "ml-slider" ) ?>' />

                                        <input class='alignright button button-primary' type='submit' name='preview' id='ms-preview' value='<?php _e( "Save & Preview", "ml-slider" ) ?>' data-slider_id='<?php echo $this->slider->id ?>' data-slider_width='<?php echo $this->slider->get_setting( 'width' ) ?>' data-slider_height='<?php echo $this->slider->get_setting( 'height' ) ?>' />

                                        <span class="spinner"></span>

                                    </div>

                                    <div class="inside">

                                        <table class="settings">

                                            <tbody>

                                                <?php

                                                    $aFields = array(

                                                        'type' => array(

                                                            'priority' => 0,

                                                            'type' => 'slider-lib',

                                                            'value' => $this->slider->get_setting( 'type' ),

                                                            'options' => array(

                                                                'flex'       => array( 'label' => __( "Flex Slider", "ml-slider" ) ),

                                                                'responsive' => array( 'label' => __( "R. Slides", "ml-slider" ) ),

                                                                'nivo'       => array( 'label' => __( "Nivo Slider", "ml-slider" ) ),

                                                                'coin'       => array( 'label' => __( "Coin Slider", "ml-slider" ) )

                                                            )

                                                        ),

                                                        'width' => array(

                                                            'priority' => 10,

                                                            'type' => 'number',

                                                            'size' => 3,

                                                            'min' => 0,

                                                            'max' => 9999,

                                                            'step' => 1,

                                                            'value' => $this->slider->get_setting( 'width' ),

                                                            'label' => __( "Width", "ml-slider" ),

                                                            'class' => 'coin flex responsive nivo',

                                                            'helptext' => __( "Slideshow width", "ml-slider" ),

                                                            'after' => __( "px", "ml-slider" )

                                                        ),

                                                        'height' => array(

                                                            'priority' => 20,

                                                            'type' => 'number',

                                                            'size' => 3,

                                                            'min' => 0,

                                                            'max' => 9999,

                                                            'step' => 1,

                                                            'value' => $this->slider->get_setting( 'height' ),

                                                            'label' => __( "Height", "ml-slider" ),

                                                            'class' => 'coin flex responsive nivo',

                                                            'helptext' => __( "Slideshow height", "ml-slider" ),

                                                            'after' => __( "px", "ml-slider" )

                                                        ),

                                                        'effect' => array(

                                                            'priority' => 30,

                                                            'type' => 'select',

                                                            'value' => $this->slider->get_setting( 'effect' ),

                                                            'label' => __( "Effect", "ml-slider" ),

                                                            'class' => 'effect coin flex responsive nivo',

                                                            'helptext' => __( "Slide transition effect", "ml-slider" ),

                                                            'options' => array(

                                                                'random'             => array( 'class' => 'option coin nivo' , 'label' => __( "Random", "ml-slider" ) ),

                                                                'swirl'              => array( 'class' => 'option coin', 'label' => __( "Swirl",