<?php
// @codingStandardsIgnoreLine
/*
 * MetaSlider. Slideshow plugin for WordPress.
 *
 * Plugin Name: MetaSlider
 * 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:     3.6.8
 * Author:      Team Updraft
 * Author URI:  https://www.metaslider.com
 * License:     GPL-2.0+
 * Copyright:   2017 Simba Hosting 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 {

    /**
     * Meta slider version number
     *
     * @var string
     */
    public $version = '3.6.8';

    /**
     * The lowest tier price for upgrades
     *
     * @var string
     */
    public $pro_price = '39';

    /**
     * Specific SLider
     *
     * @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();
        $this->admin = new MetaSlider_Admin_Pages($this);
    }


    /**
     * Define MetaSlider 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_ADMIN_URL',  trailingslashit(METASLIDER_BASE_URL . 'admin'));
        define('METASLIDER_PATH',       plugin_dir_path(__FILE__));
        define('METASLIDER_PRO_PRICE',  $this->pro_price);
    }

    /**
     * All MetaSlider 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',
            'metaslider_notices'     => METASLIDER_PATH . 'admin/Notices.php',
            'metaslider_admin_pages' => METASLIDER_PATH . 'admin/Pages.php',
            'metaslider_tour'        => METASLIDER_PATH . 'admin/Tour.php'
        );
    }


    /**
     * Load required classes
     */
    private function includes() {
        require_once(METASLIDER_PATH . 'admin/lib/helpers.php');
        $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 MetaSlider classes to reduce memory consumption
     *
     * @param  string $class Class name
     */
    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 MetaSlider into WordPress
     */
    private function setup_actions() {
        add_action('admin_menu', array($this, 'register_admin_pages'), 9553);
        add_action('init', array($this, 'register_post_types'));
        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($this, 'do_preview'));
        add_action('admin_post_metaslider_switch_view', array($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'));

        add_action('media_upload_vimeo', array($this, 'upgrade_to_pro_tab'));
        add_action('media_upload_youtube', array($this, 'upgrade_to_pro_tab'));
        add_action('media_upload_post_feed', array($this, 'upgrade_to_pro_tab'));
        add_action('media_upload_layer', array($this, 'upgrade_to_pro_tab'));

        // TODO: Refactor to Slide class object
        add_action('wp_ajax_delete_slide', array($this, 'ajax_delete_slide'));
        add_action('wp_ajax_undelete_slide', array($this, 'ajax_undelete_slide'));

        // TODO: Make this work
        // register_activation_hook(plugin_basename(__FILE__), array($this, 'after_activation'));
    }


    /**
     * Hook MetaSlider 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($this, 'insert_metaslider_button'));
        add_filter("plugin_row_meta", array($this, 'get_extra_meta_links'), 10, 4);
        add_action('admin_head', array($this, 'add_star_styles'));
        add_action('admin_head', array($this, 'add_tour_nonce_to_activation_page'));

        // html5 compatibility for stylesheets enqueued within <body>
        add_filter('style_loader_tag', array($this, 'add_property_attribute_to_stylesheet_links'), 11, 2);
    }


    /**
     * Register MetaSlider widget
     */
    public function register_metaslider_widget() {
        register_widget('MetaSlider_Widget');
    }


    /**
     * Register ML Slider post type
     */
    public function register_post_types() {

        $show_ui = false;

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

        if ( is_admin() && current_user_can( $capability ) && ( isset($_GET['show_ui']) || defined("METASLIDER_DEBUG") && METASLIDER_DEBUG ) ) {
            $show_ui = true;
        }

        register_post_type( 'ml-slider', array(
                'query_var' => false,
                'rewrite' => false,
                'public' => false,
                'exclude_from_search' => true,
                'publicly_queryable' => false,
                'show_in_nav_menus' => false,
                'show_ui' => $show_ui,
                'labels' => array(
                    'name' => 'MetaSlider'
                )
            )
        );

        register_post_type( 'ml-slide', array(
                'query_var' => false,
                'rewrite' => false,
                'public' => false,
                'exclude_from_search' => true,
                'publicly_queryable' => false,
                'show_in_nav_menus' => false,
                'show_ui' => $show_ui,
                'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt'),
                'labels' => array(
                    'name' => 'Meta Slides'
                )
            )
        );

    }


    /**
     * Register taxonomy to store slider => slides relationship
     */
    public function register_taxonomy() {

        $show_ui = false;

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

        if (is_admin() && current_user_can( $capability ) && ( isset($_GET['show_ui']) || defined("METASLIDER_DEBUG") && METASLIDER_DEBUG ) ) {
            $show_ui = true;
        }

        register_taxonomy( 'ml-slider', array('attachment', 'ml-slide'), array(
                'hierarchical' => true,
                'public' => false,
                'query_var' => false,
                'rewrite' => false,
                'show_ui' => $show_ui,
                'label' => "Slider"
            )
        );

    }


    /**
     * Register our slide types
     */
    private function register_slide_types() {

        $image = new MetaImageSlide();

    }

   /**
    * Add the menu pages
    */
    public function register_admin_pages() {
        if (metaslider_is_pro_active()) {
            $this->admin->add_page('MetaSlider Pro', 'metaslider');
        } else {
            $this->admin->add_page('MetaSlider');
        }

        if (metaslider_sees_upgrade_page()) {
            $this->admin->add_page(__('Add-ons', 'ml-slider'), 'upgrade', 'metaslider');
        }   
    }

    /**
     * Shortcode used to display slideshow
     *
     * @param  string $atts attributes for short code
     * @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' || $slider->post_type != 'ml-slider' ) {
            return "<!-- MetaSlider {$atts['id']} not found -->";
        }

        // lets go
        $this->set_slider( $id, $atts );
        $this->slider->enqueue_scripts();

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

    }

    /**
     * Set first activation option to database
     */
    public function after_activation() {

        // Set date showing the first activation and redirect
        if (!get_option('ms_was_installed_on')) {
            update_option('ms_was_installed_on', time());
        }
    }

    /**
     * Initialise translations
     */
    public function load_plugin_textdomain() {

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

    }


    /**
     * 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 MetaSlider
     */
    public function do_system_check() {

        $systemCheck = new MetaSliderSystemCheck();
        $systemCheck->check();

    }


    /**
     * Update the tab options in the media manager
     *
     * @param  array $strings Array of settings for custom media tabs
     * @return array
     */
    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 slideshow", "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
     *
     * @param  array $tabs existing media manager tabs]
     * @return array
     */
    public function custom_media_upload_tab_name( $tabs ) {

        $metaslider_tabs = array( 'post_feed', 'layer', 'youtube', 'vimeo' );

        // restrict our tab changes to the MetaSlider plugin page
        if ( ( isset( $_GET['page'] ) && $_GET['page'] == 'metaslider' ) || ( isset( $_GET['tab'] ) && in_array( $_GET['tab'], $metaslider_tabs ) ) ) {
            $newtabs = array();

            if ( function_exists( 'is_plugin_active' ) && ! is_plugin_active( 'ml-slider-pro/ml-slider-pro.php' ) ) {
                $newtabs = array(
                    'post_feed' => __( "Post Feed", "metaslider" ),
                    'vimeo' => __( "Vimeo", "metaslider" ),
                    'youtube' => __( "YouTube", "metaslider" ),
                    'layer' => __( "Layer Slide", "metaslider" )
                );
            }

            if ( isset( $tabs['nextgen'] ) ) 
                unset( $tabs['nextgen'] );


            if ( is_array( $tabs ) ) {
                return array_merge( $tabs, $newtabs );
            } else {
                return $newtabs;
            }
            
        }

        return $tabs;


    }

    /**
     * Set the current slider
     *
     * @param int   $id                 ID for slider
     * @param array $shortcode_settings Settings for 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
     *
     * @param  string $type               Type of slide
     * @param  int    $id                 ID of slide
     * @param  string $shortcode_settings Shortcode settings
     * @return array
     */
    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 );

        }
    }

    /**
     * Update the slider
     *
     * @return null
     */
    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 via ajax.
     *
     * @return string Returns the status of the request
     */
    public function ajax_undelete_slide() {
        if (!wp_verify_nonce($_REQUEST['_wpnonce'], 'metaslider_undelete_slide')) {
			return wp_send_json_error(array(
					'message' => __('The security check failed. Please refresh the page and try again.', 'ml-slider')
			), 401);
        }
        
        $result = $this->undelete_slide(absint($_POST['slide_id']), absint($_POST['slider_id']));
        
		if (is_wp_error($result)) {
			return wp_send_json_error(array(
					'message' => $result->get_error_message()
			), 409);
		}
		
		return wp_send_json_success(array(
            'message' => __('The slide was successfully restored', 'ml-slider'),
        ), 200);
    }

    /**
     * Undeletes a slide.
     *
     * @param int $slide_id  The ID of the slide
     * @param int $slider_id The ID of the slider (for legacy purposes)
     * @return mixed 
     */
    public function undelete_slide($slide_id, $slider_id) {
        if ('ml-slide' === get_post_type($slide_id)) {
            return wp_update_post(array(
                'ID' => $slide_id,
                'post_status' => 'publish'
            ), new WP_Error('update_failed', __('The attempt to restore the slide failed.', 'ml-slider'), array('status' => 409)));
        }
        
        /*
         * Legacy: This removes the relationship between the slider and slide
         * This restores the relationship between a slide and slider.
         * If using a newer version, this relationship is never lost on delete.
         */

        // Get the slider's term and apply it to the slide.
        $term = get_term_by('name', $slider_id, 'ml-slider');
        return wp_set_object_terms($slide_id, $term->term_id, 'ml-slider');
    }
    
    /**
     * Delete a slide via ajax.
     */
    public function ajax_delete_slide() {
        if (!wp_verify_nonce($_REQUEST['_wpnonce'], 'metaslider_delete_slide')) {
			return wp_send_json_error(array(
					'message' => __('The security check failed. Please refresh the page and try again.', 'ml-slider')
			), 401);
        }
        
        $result = $this->delete_slide(absint($_POST['slide_id']), absint($_POST['slider_id']));
        
		if (is_wp_error($result)) {
			return wp_send_json_error(array(
					'message' => $result->get_error_message()
			), 409);
		}
		
		return wp_send_json_success(array(
            'message' => __('The slide was successfully trashed', 'ml-slider'),
        ), 200);
    }

    /**
     * Delete a slide by either trashing it or for 
     * legacy reasons removing the taxonomy relationship.
     *
     * @param int $slide_id  The ID of the slide
     * @param int $slider_id The ID of the slider
     * @return mixed Will return the terms or WP_Error
     */
    public function delete_slide($slide_id, $slider_id) {
        if ('ml-slide' === get_post_type($slide_id)) {
            return wp_update_post(array(
                'ID' => $slide_id,
                'post_status' => 'trash'
            ), new WP_Error('update_failed', 'The attempt to delete the slide failed.', array('status' => 409)));
        }
        
        /*
         * Legacy: This removes the relationship between the slider and slide
         * A slider with ID 216 might have a term_id of 7
         * A slide with ID 217 could have a term_taxonomy_id of 7
         * Multiple slides would have this term_taxonomy_id of 7
         */

        // This returns the term_taxonomy_id (7 from example)
        $current_terms = wp_get_object_terms($slide_id, 'ml-slider', array('fields' => 'ids'));
        
        // This returns the term object, named after the slider ID
        // The $term->term_id would be 7 in the example above
        // It also includes the count of slides attached to the slider
        $term = get_term_by('name', $slider_id, 'ml-slider');
        
        // I'm not sure why this is here. It seems this is only useful if
        // a slide was attached to multiple sliders. A slide should only
        // have one $current_terms (7 above)
        $new_terms = array();
        foreach ($current_terms as $current_term) {
            if ($current_term != $term->term_id) {
                $new_terms[] = absint($current_term);
            }
        }

        // This only works becasue $new_terms is an empty array, 
        // which deletes the relationship. I'm leaving the loop above
        // in case it's here for some legacy reason I'm unaware of.
        return wp_set_object_terms($slide_id, $new_terms, 'ml-slider');
    }


    /**
     * 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'] );

        if ( get_post_type( $slider_id ) != 'ml-slider' ) {
            wp_redirect( admin_url( "admin.php?page=metaslider" ) );
            wp_die();
        }

        // send the post to trash
        $id = wp_update_post( array(
                'ID' => $slider_id,
                'post_status' => 'trash'
            )
        );

        $this->delete_all_slides_from_slider($slider_id);

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

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

    }


    /**
     * Trashes all new format slides for a given slideshow ID
     *
     * @param int $slider_id Specified Slider ID
     * @return int - The ID of the slideshow from which the slides were removed
     */
    private function delete_all_slides_from_slider($slider_id) {
        // find slides and trash them
        $args = array(
            'force_no_custom_order' => true,
            'orderby' => 'menu_order',
            'order' => 'ASC',
            'post_type' => array('ml-slide'),
            'post_status' => array('publish'),
            'lang' => '', // polylang, ingore language filter
            'suppress_filters' => 1, // wpml, ignore language filter
            'posts_per_page' => -1,
            'tax_query' => array(
                array(
                    'taxonomy' => 'ml-slider',
                    'field' => 'slug',
                    'terms' => $slider_id
                )
            )
        );

        $query = new WP_Query( $args );

        while ( $query->have_posts() ) {
            $query->next_post();
            $id = $query->post->ID;

            $id = wp_update_post( array(
                    'ID' => $id,
                    'post_status' => 'trash'
                )
            );
        }

        return $slider_id;
    }


    /**
     * Switch view
     *
     * @return null
     */
    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 Slideshow", "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 Specified 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 The first element to comapre
     * @param array $elem2 The second element to comapr
     * @return bool
     */
    private function compare_elems( $elem1, $elem2 ) {

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

    }


    /**
     * Building setting rows
     *
     * @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 ) {
                    $tease = isset($v['addon_required']) ? 'disabled' : '';

                    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' : '';
                    $navigation_row .= "<li><label class='{$tease}'><input {$tease} type='radio' name='settings[{$id}]' value='{$k}' {$checked} {$disabled}/>{$v['label']}</label>";
                    
                    if (isset($v['addon_required']) && $v['addon_required']) {
                        $navigation_row .= sprintf(" <a target='_blank' class='get-addon' href='%s' title='%s'>%s</a>", metaslider_get_upgrade_link(), __('Get the add-on pack today!', 'ml-slider'), __('Learn More', 'ml-slider'));
                    }

                    $navigation_row .= "</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}' {$checked} />
                    <label tabindex='0' for='{$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;

        // First check if we have any slideshows yet
        if ($tabs = $this->all_meta_sliders()) {

            // Next check if they have the tabs view selected
            if ('tabs' == $this->get_view()) {

                // Render the tabs
                echo "<div class='nav-tab-wrapper'>";
                    foreach ($tabs as $tab) {
                        if ( $tab['active'] ) {
                            echo "<div class='nav-tab nav-tab-active'><input class='no_last_pass' type='text' name='title'  value='" . esc_attr($tab['title']) . "'></div>";
                        } else {
                            echo "<a href='?page=metaslider&amp;id={$tab['id']}' title= '" . esc_attr($tab['title']) . "' class='nav-tab'>" . esc_html( $tab['title'] ) . "</a>";
                        }
                    }
                    echo $this->get_add_slideshow_button("New", 'nav-tab');
                echo "</div>";

            // This will render the select dropdown view
            // TODO make this resemble the WP Nav menu UI perhaps
            } else {
                echo "<div class='manage-menus'><label for='select-slideshow' class='selected-menu'>" . __("Select Slideshow", "ml-slider") . ": </label>";
                echo "<select name='select-slideshow' 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>";
                echo "<span class='add-new-menu-action'> " . __( 'or', "ml-slider" ) . " ";
                echo "<a href='". wp_nonce_url(admin_url("admin-post.php?action=metaslider_create_slider"), "metaslider_create_slider") ."' id='create_new_tab' class='' title='" . __('Create a New Slideshow', 'ml-slider') . "'>create a new slideshow</a>";
                echo "</span></div>";
            }

        // This section is shown when there are no slideshows
        } else {
            echo "<div class='nav-tab-wrapper'>";
                echo "<div class='fake-tabs nav-tab nav-tab-active'><span class='blurred-out'>" . __('New Slideshow', 'ml-slider') ."</span></div>";
            echo $this->get_add_slideshow_button("New", 'nav-tab');
            echo "</div>";
        }
    }

    /**
     * Return a button to sadd a new slideshow.
     *
     * @param  string $text    text for the button
     * @param  string $classes Specify calsses for the button
     * @return sring           HTMl Button
     */
    protected function get_add_slideshow_button($text = '', $classes = '') {
        $add_url = wp_nonce_url(admin_url("admin-post.php?action=metaslider_create_slider"), "metaslider_create_slider");
        if ('' == $text) {
            $text = __('Add a New Slideshow', 'ml-slider');
        }
        return "<a href='{$add_url}' id='create_new_tab' class='ml-add-new {$classes}' title='" . __('Add a New Slideshow', 'ml-slider') . "'><i><svg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-plus-circle'><circle cx='12' cy='12' r='10'/><line x1='12' y1='8' x2='12' y2='16'/><line x1='8' y1='12' x2='16' y2='12'/></svg></i> {$text}</a>";
    }

    /**
     * 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 most recently modified slider
        $slider_id = $this->find_slider('modified', 'DESC');

        // If the id parameter exists, verify and use that. 
        if (isset($_REQUEST['id']) && $id = $_REQUEST['id']) {
            if (in_array(get_post_status(absint($id)), array('publish', 'inherit'))) {
                $slider_id = $id;
            }
        }

        // "Set the slider"
        // TODO figure out what this does and if it can be better stated
        // Perhaps maybe "apply_settings()" or something.
        if ($slider_id) {
            $this->set_slider($slider_id);
        }

        echo "<div class='wrap metaslider-ui-top' style='margin-top:0;'>";
        echo $this->documentation_button();
        echo $this->toggle_layout_button();
        
        if (metaslider_sees_call_to_action()) {
            echo $this->addons_page_button();
            echo $this->upgrade_to_pro_top_button();
        }
        echo "</div>";
        
        $this->do_system_check();

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

        ?>

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

        <div class="wrap metaslider metaslider-ui">
            <h1 class="wp-heading-inline metaslider-title">
                <img width=50 height=50 src="<?php echo METASLIDER_ADMIN_URL ?>images/metaslider_logo_large.png" alt="MetaSlider">
                MetaSlider
                <?php if (metaslider_is_pro_active()) {
                    echo ' Pro';
                } ?>
            </h1>
			<?php if (metaslider_sees_notices($this)) {
                echo $this->notices->do_notice(false, 'header', true); 
            } ?>
            <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' class="metaslider-inner wp-clearfix">
                    <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 metaslider-slides-container">
                                    <thead>
                                        <tr>
                                            <?php if (metaslider_viewing_trashed_slides($this->slider->id)) { 
                                                
                                                // If they are on the trash page, show them?>
                                                <th class="trashed-header">
                                                    <h3><i><svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-trash-2"><polyline points="3 6 5 6 21 6"/><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/><line x1="10" y1="11" x2="10" y2="17"/><line x1="14" y1="11" x2="14" y2="17"/></svg></i> <?php _e('Trashed Slides', 'ml-slider'); ?></h3>
                                                    <small> <?php printf(__('<a href="%s">view active</a>', 'ml-slider'), admin_url("?page=metaslider&id={$this->slider->id}")); ?></small>
                                                </th>
                                            <?php } else { ?>
                                                <th class="slider-title" colspan="2">
                                                <h3 class="alignleft"><?php echo get_the_title($this->slider->id) ?></h3>
                                                <?php if (!metaslider_viewing_trashed_slides($this->slider->id)) { 
                                                    
                                                    // Remove the actions on trashed view?>
                                                    <button class='ml-button ml-has-icon ml-skinless-button alignright add-slide' data-editor='content' title='<?php _e( "Add a New Slide", "ml-slider" ) ?>'>
                                                        <i style="top:0;"><svg xmlns="http://www.w3.org/2000/svg" width="17" height="17" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-plus-circle"><circle cx="12" cy="12" r="10"/><line x1="12" y1="8" x2="12" y2="16"/><line x1="8" y1="12" x2="16" y2="12"/></svg></i>
                                                        <span><?php _e("Add Slide", "ml-slider") ?></span>
                                                    </button>
                                                <?php } ?>
                                                    <?php do_action( "metaslider_admin_table_header_right", $this->slider->id ); ?>
                                                </th>
                                            <?php } ?>
                                        </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 ml-sidebar metaslider-settings-area">
                            <div class='right'>
                            <?php if (metaslider_viewing_trashed_slides($this->slider->id)) { 
                                
                                // Show a notice explaining the trash?>
                                <div class="ms-postbox trashed-notice">
                                    <div class="notice-info"><?php printf(__('You are viewing slides that have been trashed, which will be automatically deleted in %s days. Click <a href="%s">here</a> to view active slides.', 'ml-slider'), EMPTY_TRASH_DAYS, admin_url("?page=metaslider&id={$this->slider->id}")); ?></div>

                                    <?php 
                                        // TODO this is a temp fix to avoid a compatability check in pro
                                        echo "<input type='checkbox' style='display:none;' checked class='select-slider' rel='flex'></inpu>";
                                    ?>
                                </div>
                            <?php } else {?>
                                <div class="ms-postbox" id="metaslider_configuration">
                                    <div class='configuration metaslider-actions'>
                                        <button class='metaslider-preview ml-button ml-has-icon ml-skinless-button' type='submit' id='ms-preview' title='<?php _e("Preview Slideshow", "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") ?>'>
                                            <i><svg xmlns="http://www.w3.org/2000/svg" width="17" height="17" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-eye"><path d="M1 12s4-8 11-8 11 8 11 8-4 8-11 8-11-8-11-8z"/><circle cx="12" cy="12" r="3"/></svg></i>
                                            <span><?php _e("Preview", "ml-slider") ?></span>
                                        </button>
                                        <button class='alignright button button-primary' type='submit' name='save' id='ms-save'>
                                            <?php _e("Save", "ml-slider"); ?>
                                        </button>
                                        <span class="spinner"></span>
                                    </div>
                                    <div class="inside wp-clearfix">
                                        <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' => "FlexSlider"),
                                                                'responsive' => array('label' => "R. Slides"),
                                                                'nivo' => array('label' => "Nivo Slider"),
                                                                'coin' => array('label' => "Coin 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", "ml-slider" ) ),
                                                                'rain'               => array( 'class' => 'option coin', 'label' => __( "Rain", "ml-slider" ) ),
                                                                'straight'           => array( 'class' => 'option coin', 'label' => __( "Straight", "ml-slider" ) ),
                                                                'sliceDown'          => array( 'class' => 'option nivo', 'label' => __( "Slide Down", "ml-slider" ) ),
                                                                'sliceUp'            => array( 'class' => 'option nivo', 'label' => __( "Slice Up", "ml-slider" ) ),
                                                                'sliceUpLeft'        => array( 'class' => 'option nivo', 'label' => __( "Slide Up Left", "ml-slider" ) ),
                                                                'sliceUpDown'        => array( 'class' => 'option nivo', 'label' => __( "Slice Up Down", "ml-slider" ) ),
                                                                'slideUpDownLeft'    => array( 'class' => 'option nivo', 'label' => __( "Slide Up Down Left", "ml-slider" ) ),
                                                                'fold'               => array( 'class' => 'option nivo', 'label' => __( "Fold", "ml-slider" ) ),
                                                                'fade'               => array( 'class' => 'option nivo flex responsive', 'label' => __( "Fade", "ml-slider" ) ),
                                                                'slideInRight'       => array( 'class' => 'option nivo', 'label' => __( "Slide In Right", "ml-slider" ) ),
                                                                'slideInLeft'        => array( 'class' => 'option nivo', 'label' => __( "Slide In Left", "ml-slider" ) ),
                                                                'boxRandom'          => array( 'class' => 'option nivo', 'label' => __( "Box Random", "ml-slider" ) ),
                                                                'boxRain'            => array( 'class' => 'option nivo', 'label' => __( "Box Rain", "ml-slider" ) ),
                                                                'boxRainReverse'     => array( 'class' => 'option nivo', 'label' => __( "Box Rain Reverse", "ml-slider" ) ),
                                                                'boxRainGrowReverse' => array( 'class' => 'option nivo', 'label' => __( "Box Rain Grow Reverse", "ml-slider" ) ),
                                                                'slide'              => array( 'class' => 'option flex', 'label' => __( "Slide", "ml-slider" ) )
                                                            ),
                                                        ),
                                                        'theme' => array(
                                                            'priority' => 40,
                                                            'type' => 'theme',
                                                            'value' => $this->slider->get_setting( 'theme' ),
                                                            'label' => __( "Theme", "ml-slider" ),
                                                            'class' => 'effect coin flex responsive nivo',
                                                            'helptext' => __( "Slideshow theme", "ml-slider" ),
                                                            'options' => array(
                                                                'default' => array( 'class' => 'option nivo flex coin responsive' , 'label' => __( "Default", "ml-slider" ) ),
                                                                'dark'    => array( 'class' => 'option nivo', 'label' => __( "Dark (Nivo)", "ml-slider" ) ),
                                                                'light'   => array( 'class' => 'option nivo', 'label' => __( "Light (Nivo)", "ml-slider" ) ),
                                                                'bar'     => array( 'class' => 'option nivo', 'label' => __( "Bar (Nivo)", "ml-slider" ) ),
                                                            ),
                                                        ),
                                                        'links' => array(
                                                            'priority' => 50,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Arrows", "ml-slider" ),
                                                            'class' => 'option coin flex nivo responsive',
                                                            'checked' => $this->slider->get_setting( 'links' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Show the previous/next arrows", "ml-slider" )
                                                        ),
                                                        'navigation' => array(
                                                            'priority' => 60,
                                                            'type' => 'navigation',
                                                            'label' => __("Navigation", "ml-slider"),
                                                            'class' => 'option coin flex nivo responsive',
                                                            'value' => $this->slider->get_setting('navigation'),
                                                            'helptext' => __("Show the slide navigation bullets", "ml-slider"),
                                                            'options' => array(
                                                                'false' => array('label' => __("Hidden", "ml-slider")),
                                                                'true' => array('label' => __("Dots", "ml-slider")),
                                                                'thumbs' => array(
                                                                    'label' => __("Thumbnail", "ml-slider"),
                                                                    'addon_required' => true
                                                                ),
                                                                'filmstrip' => array(
                                                                    'label' => __("Filmstrip", "ml-slider"),
                                                                    'addon_required' => true
                                                                ),
                                                            )
                                                        ),
                                                    );
                        
                                                    if ( $this->get_view() == 'dropdown' ) {
                                                        $aFields['title'] = array(
                                                            'type' => 'title',
                                                            'priority' => 5,
                                                            'class' => 'option flex nivo responsive coin',
                                                            'value' => get_the_title($this->slider->id),
                                                            'label' => __( "Title", "ml-slider" ),
                                                            'helptext' => __( "Slideshow title", "ml-slider" )
                                                        );
                                                    }

                                                    $aFields = apply_filters( 'metaslider_basic_settings', $aFields, $this->slider );

                                                    echo $this->build_settings_rows( $aFields );
                                                ?>
                                            </tbody>
                                        </table>

                                        
                                        <?php 
                                        // Show the restore button if there are trashed posts
                                        // Also, render but hide the link in case we want to show
                                        // it when the user deletes their first slide
                                        $count = count(metaslider_has_trashed_slides($this->slider->id));
                                        if (!metaslider_viewing_trashed_slides($this->slider->id)) { ?>
                                            <a <?php echo $count ? '' : "style='display:none;'" ?> class="restore-slide-link" title="<?php _e('View trashed slides', 'ml-slider'); ?>" href="<?php echo admin_url("?page=metaslider&id={$this->slider->id}&show_trashed=true"); ?>">
                                                <i><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-trash-2"><polyline points="3 6 5 6 21 6"/><path d="M19 6v14a2 2 0 0 1-2 2H7a2 2 0 0 1-2-2V6m3 0V4a2 2 0 0 1 2-2h4a2 2 0 0 1 2 2v2"/><line x1="10" y1="11" x2="10" y2="17"/><line x1="14" y1="11" x2="14" y2="17"/></svg></i><?php echo __('Trash', 'ml-slider'); if ($count) echo " <span>({$count})</span>";?>
                                            </a>
                                        <?php } ?>
                                    </div>
                                </div>
                                <div class="ms-postbox"><h3 class="hndle"><span><?php _e("How to Use", "ml-slider" ) ?></span></h3>
                                    <div class="inside wp-clearfix metaslider-shortcode">
                                        <?php echo $this->shortcode_tip(); ?>
                                    </div>
                                </div>
                                <div class="ms-postbox ms-toggle closed" id="metaslider_advanced_settings">
                                    <div class="handlediv" title="<?php esc_attr_e('Click to toggle', 'ml-slider'); ?>"></div><h3 class="hndle"><span><?php _e("Advanced Settings", "ml-slider") ?></span></h3>
                                    <div class="inside">
                                        <table>
                                            <tbody>
                                                <?php
                                                    $aFields = array(
                                                        'fullWidth' => array(
                                                            'priority' => 5,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Stretch", "ml-slider" ),
                                                            'class' => 'option flex nivo responsive',
                                                            'after' => __( "100% wide output", "ml-slider" ),
                                                            'checked' => $this->slider->get_setting( 'fullWidth' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Stretch the slideshow output to fill it's parent container", "ml-slider" )
                                                        ),
                                                        'center' => array(
                                                            'priority' => 10,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Center align", "ml-slider" ),
                                                            'class' => 'option coin flex nivo responsive',
                                                            'checked' => $this->slider->get_setting( 'center' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Center align the slideshow", "ml-slider" )
                                                        ),
                                                        'autoPlay' => array(
                                                            'priority' => 20,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Auto play", "ml-slider" ),
                                                            'class' => 'option flex nivo responsive',
                                                            'checked' => $this->slider->get_setting( 'autoPlay' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Transition between slides automatically", "ml-slider" )
                                                        ),
                                                        'smartCrop' => array(
                                                            'priority' => 30,
                                                            'type' => 'select',
                                                            'label' => __( "Image Crop", "ml-slider" ),
                                                            'class' => 'option coin flex nivo responsive',
                                                            'value' => $this->slider->get_setting( 'smartCrop' ),
                                                            'options' => array(
                                                                'true' => array( 'label' => __( "Smart Crop", "ml-slider" ), 'class' => '' ),
                                                                'false' => array( 'label' => __( "Standard", "ml-slider" ), 'class' => '' ),
                                                                'disabled' => array( 'label' => __( "Disabled", "ml-slider" ), 'class' => '' ),
                                                                'disabled_pad' => array( 'label' => __( "Disabled (Smart Pad)", "ml-slider" ), 'class' => 'option flex' ),
                                                            ),
                                                            'helptext' => __( "Smart Crop ensures your responsive slides are cropped to a ratio that results in a consistent slideshow size", "ml-slider" )
                                                        ),
                                                        'carouselMode' => array(
                                                            'priority' => 40,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Carousel mode", "ml-slider" ),
                                                            'class' => 'option flex showNextWhenChecked',
                                                            'checked' => $this->slider->get_setting( 'carouselMode' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Display multiple slides at once. Slideshow output will be 100% wide.", "ml-slider" )
                                                        ),
                                                        'carouselMargin' => array(
                                                            'priority' => 45,
                                                            'min' => 0,
                                                            'max' => 9999,
                                                            'step' => 1,
                                                            'type' => 'number',
                                                            'label' => __( "Carousel margin", "ml-slider" ),
                                                            'class' => 'option flex',
                                                            'value' => $this->slider->get_setting( 'carouselMargin' ),
                                                            'helptext' => __( "Pixel margin between slides in carousel.", "ml-slider" ),
                                                            'after' => __( "px", "ml-slider" )
                                                        ),
                                                        'random' => array(
                                                            'priority' => 50,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Random", "ml-slider" ),
                                                            'class' => 'option coin flex nivo responsive',
                                                            'checked' => $this->slider->get_setting( 'random' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Randomise the order of the slides", "ml-slider" )
                                                        ),
                                                        'hoverPause' => array(
                                                            'priority' => 60,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Hover pause", "ml-slider" ),
                                                            'class' => 'option coin flex nivo responsive',
                                                            'checked' => $this->slider->get_setting( 'hoverPause' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Pause the slideshow when hovering over slider, then resume when no longer hovering.", "ml-slider" )
                                                        ),
                                                        'reverse' => array(
                                                            'priority' => 70,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Reverse", "ml-slider" ),
                                                            'class' => 'option flex',
                                                            'checked' => $this->slider->get_setting( 'reverse' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Reverse the animation direction", "ml-slider" )
                                                        ),
                                                        'delay' => array(
                                                            'priority' => 80,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 500,
                                                            'max' => 10000,
                                                            'step' => 100,
                                                            'value' => $this->slider->get_setting( 'delay' ),
                                                            'label' => __( "Slide delay", "ml-slider" ),
                                                            'class' => 'option coin flex responsive nivo',
                                                            'helptext' => __( "How long to display each slide, in milliseconds", "ml-slider" ),
                                                            'after' => __( "ms", "ml-slider" )
                                                        ),
                                                        'animationSpeed' => array(
                                                            'priority' => 90,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 0,
                                                            'max' => 2000,
                                                            'step' => 100,
                                                            'value' => $this->slider->get_setting( 'animationSpeed' ),
                                                            'label' => __( "Animation speed", "ml-slider" ),
                                                            'class' => 'option flex responsive nivo',
                                                            'helptext' => __( "Set the speed of animations, in milliseconds", "ml-slider" ),
                                                            'after' => __( "ms", "ml-slider" )
                                                        ),
                                                        'slices' => array(
                                                            'priority' => 100,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 0,
                                                            'max' => 20,
                                                            'step' => 1,
                                                            'value' => $this->slider->get_setting( 'slices' ),
                                                            'label' => __( "Number of slices", "ml-slider" ),
                                                            'class' => 'option nivo',
                                                            'helptext' => __( "Number of slices", "ml-slider" ),
                                                            'after' => __( "ms", "ml-slider" )
                                                        ),
                                                        'spw' => array(
                                                            'priority' => 110,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 0,
                                                            'max' => 20,
                                                            'step' => 1,
                                                            'value' => $this->slider->get_setting( 'spw' ),
                                                            'label' => __( "Number of squares", "ml-slider" ) . " (" . __( "Width", "ml-slider" ) . ")",
                                                            'class' => 'option nivo',
                                                            'helptext' => __( "Number of squares", "ml-slider" ),
                                                            'after' => ''
                                                        ),
                                                        'sph' => array(
                                                            'priority' => 120,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 0,
                                                            'max' => 20,
                                                            'step' => 1,
                                                            'value' => $this->slider->get_setting( 'sph' ),
                                                            'label' => __( "Number of squares", "ml-slider" ) . " (" . __( "Height", "ml-slider" ) . ")",
                                                            'class' => 'option nivo',
                                                            'helptext' => __( "Number of squares", "ml-slider" ),
                                                            'after' => ''
                                                        ),
                                                        'direction' => array(
                                                            'priority' => 130,
                                                            'type' => 'select',
                                                            'label' => __( "Slide direction", "ml-slider" ),
                                                            'class' => 'option flex',
                                                            'helptext' => __( "Select the sliding direction", "ml-slider" ),
                                                            'value' => $this->slider->get_setting( 'direction' ),
                                                            'options' => array(
                                                                'horizontal' => array( 'label' => __( "Horizontal", "ml-slider" ), 'class' => '' ),
                                                                'vertical' => array( 'label' => __( "Vertical", "ml-slider" ), 'class' => '' ),
                                                            )
                                                        ),
                                                        'easing' => array(
                                                            'priority' => 140,
                                                            'type' => 'select',
                                                            'label' => __( "Easing", "ml-slider" ),
                                                            'class' => 'option flex',
                                                            'helptext' => __( "Animation easing effect", "ml-slider" ),
                                                            'value' => $this->slider->get_setting( 'easing' ),
                                                            'options' => $this->get_easing_options()
                                                        ),
                                                        'prevText' => array(
                                                            'priority' => 150,
                                                            'type' => 'text',
                                                            'label' => __( "Previous text", "ml-slider" ),
                                                            'class' => 'option coin flex responsive nivo',
                                                            'helptext' => __( "Set the text for the 'previous' direction item", "ml-slider" ),
                                                            'value' => $this->slider->get_setting( 'prevText' ) == 'false' ? '' : $this->slider->get_setting( 'prevText' )
                                                        ),
                                                        'nextText' => array(
                                                            'priority' => 160,
                                                            'type' => 'text',
                                                            'label' => __( "Next text", "ml-slider" ),
                                                            'class' => 'option coin flex responsive nivo',
                                                            'helptext' => __( "Set the text for the 'next' direction item", "ml-slider" ),
                                                            'value' => $this->slider->get_setting( 'nextText' ) == 'false' ? '' : $this->slider->get_setting( 'nextText' )
                                                        ),
                                                        'sDelay' => array(
                                                            'priority' => 170,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 0,
                                                            'max' => 500,
                                                            'step' => 10,
                                                            'value' => $this->slider->get_setting( 'sDelay' ),
                                                            'label' => __( "Square delay", "ml-slider" ),
                                                            'class' => 'option coin',
                                                            'helptext' => __( "Delay between squares in ms", "ml-slider" ),
                                                            'after' => __( "ms", "ml-slider" )
                                                        ),
                                                        'opacity' => array(
                                                            'priority' => 180,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 0,
                                                            'max' => 1,
                                                            'step' => 0.1,
                                                            'value' => $this->slider->get_setting( 'opacity' ),
                                                            'label' => __( "Opacity", "ml-slider" ),
                                                            'class' => 'option coin',
                                                            'helptext' => __( "Opacity of title and navigation", "ml-slider" ),
                                                            'after' => ''
                                                        ),
                                                        'titleSpeed' => array(
                                                            'priority' => 190,
                                                            'type' => 'number',
                                                            'size' => 3,
                                                            'min' => 0,
                                                            'max' => 10000,
                                                            'step' => 100,
                                                            'value' => $this->slider->get_setting( 'titleSpeed' ),
                                                            'label' => __( "Caption speed", "ml-slider" ),
                                                            'class' => 'option coin',
                                                            'helptext' => __( "Set the fade in speed of the caption", "ml-slider" ),
                                                            'after' => __( "ms", "ml-slider" )
                                                        ),
                                                        'developerOptions' => array(
                                                            'priority' => 195,
                                                            'type' => 'divider',
                                                            'class' => 'option coin flex responsive nivo',
                                                            'value' => __( "Developer options", "ml-slider" )
                                                        ),
                                                        'cssClass' => array(
                                                            'priority' => 200,
                                                            'type' => 'text',
                                                            'label' => __( "CSS classes", "ml-slider" ),
                                                            'class' => 'option coin flex responsive nivo',
                                                            'helptext' => __( "Specify any custom CSS Classes you would like to be added to the slider wrapper", "ml-slider" ),
                                                            'value' => $this->slider->get_setting( 'cssClass' ) == 'false' ? '' : $this->slider->get_setting( 'cssClass' )
                                                        ),
                                                        'printCss' => array(
                                                            'priority' => 210,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Print CSS", "ml-slider" ),
                                                            'class' => 'option coin flex responsive nivo useWithCaution',
                                                            'checked' => $this->slider->get_setting( 'printCss' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Uncheck this is you would like to include your own CSS", "ml-slider" )
                                                        ),
                                                        'printJs' => array(
                                                            'priority' => 220,
                                                            'type' => 'checkbox',
                                                            'label' => __( "Print JS", "ml-slider" ),
                                                            'class' => 'option coin flex responsive nivo useWithCaution',
                                                            'checked' => $this->slider->get_setting( 'printJs' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Uncheck this is you would like to include your own Javascript", "ml-slider" )
                                                        ),
                                                        'noConflict' => array(
                                                            'priority' => 230,
                                                            'type' => 'checkbox',
                                                            'label' => __( "No conflict mode", "ml-slider" ),
                                                            'class' => 'option flex',
                                                            'checked' => $this->slider->get_setting( 'noConflict' ) == 'true' ? 'checked' : '',
                                                            'helptext' => __( "Delay adding the flexslider class to the slideshow", "ml-slider" )
                                                        ),
                                                    );

                                                    $aFields = apply_filters( 'metaslider_advanced_settings', $aFields, $this->slider );

                                                    echo $this->build_settings_rows( $aFields );
                                                ?>
                                            </tbody>
                                        </table>
                                    </div>
                                </div>

                                <?php $url = wp_nonce_url(admin_url("admin-post.php?action=metaslider_delete_slider&amp;slider_id={$this->slider->id}"), "metaslider_delete_slider"); ?>

                                <a class='delete-slider alignright ml-has-icon ml-button ml-delete-button' href='<?php echo $url ?>'><i><svg xmlns="http://www.w3.org/2000/svg" width="17" height="17" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-x"><line x1="18" y1="6" x2="6" y2="18"/><line x1="6" y1="6" x2="18" y2="18"/></svg></i><span><?php _e( "Delete Slideshow", "ml-slider" ) ?></span></a>
                            </div>
                            <?php } ?>
                        </div>
                    </div>
                </div>
            </form>
        </div>
        <?php
    }

    /**
     * Append the 'Add Slider' button to selected admin pages
     *
     * @param  string $context HTML being passed to amend HTML button
     * @return string          HTML button
     */
    public function insert_metaslider_button($context) {

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

        if ( ! current_user_can( $capability ) ) {
            return $context;
        }

        global $pagenow;

        if ( in_array( $pagenow, array( 'post.php', 'page.php', 'post-new.php', 'post-edit.php' ) ) ) {
            $context .= '<a href="#TB_inline?&inlineId=choose-meta-slider" class="thickbox button" title="' .
                __( "Select slideshow to insert into post", "ml-slider" ) .
                '"><span class="wp-media-buttons-icon" style="background: url(' . METASLIDER_ASSETS_URL .
                '/metaslider/matchalabs.png); background-repeat: no-repeat; background-position: left bottom;"></span> ' .
                __( "Add slider", "ml-slider" ) . '</a>';
        }

        return $context;

    }


    /**
     * Append the 'Choose MetaSlider' thickbox content to the bottom of selected admin pages
     */
    public function admin_footer() {

        global $pagenow;

        // Only run in post/page creation and edit screens
        if ( in_array( $pagenow, array( 'post.php', 'page.php', 'post-new.php', 'post-edit.php' ) ) ) {
            $sliders = $this->all_meta_sliders( 'title' );
            ?>

            <script>
                jQuery(document).ready(function() {
                  jQuery('#insertMetaSlider').on('click', function() {
                    var id = jQuery('#metaslider-select option:selected').val();
                    window.send_to_editor('[metaslider id=' + id + ']');
                    tb_remove();
                  })
                });
            </script>

            <div id="choose-meta-slider" style="display: none;">
                <div class="wrap">
                    <?php
                        if ( count( $sliders ) ) {
                            echo "<h3 style='margin-bottom: 20px;'>" . __( "Insert MetaSlider", "ml-slider" ) . "</h3>";
                            echo "<select id='metaslider-select'>";
                            echo "<option disabled=disabled>" . __( "Choose slideshow", "ml-slider" ) . "</option>";
                            foreach ( $sliders as $slider ) {
                                echo "<option value='{$slider['id']}'>{$slider['title']}</option>";
                            }
                            echo "</select>";
                            echo "<button class='button primary' id='insertMetaSlider'>" . __( "Insert slideshow", "ml-slider" ) . "</button>";
                        } else {
                            _e( "No slideshows found", "ml-slider" );
                        }
                    ?>
                </div>
            </div>

            <?php
        }
    }


    /**
     * Return the MetaSlider pro upgrade iFrame
     */
    public function upgrade_to_pro_tab() {

        if ( function_exists( 'is_plugin_active' ) && ! is_plugin_active( 'ml-slider-pro/ml-slider-pro.php' ) ) {
            return wp_iframe( array( $this, 'upgrade_to_pro_iframe' ) );
        }

    }

    /**
     * Provide a tip so the user can add the slideshow to thier site
     * 
     * @return string the tip
     */
    public function shortcode_tip() {
        return "<p>" . __("To display your slideshow, add the following shortcode (in orange) to your page. If adding the slideshow to your theme files, additionally include the surrounding PHP function (in gray).", "ml-slider") . "</p><pre id=\"ms-entire-code\">&lt;?php echo do_shortcode('<br>&emsp;&emsp;<span class=\"ms-shortcode\">[metaslider id=\"" . $this->slider->id . "\"]</span><br>'); ?&gt;</pre><button class=\"ms-copy-all ml-button ml-skinless-button\"><i><svg xmlns=\"http://www.w3.org/2000/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-copy\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"/><path d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"/></svg></i>" . __('copy all', 'ml-slider') . "</button>";
    }

    /**
     * Media Manager iframe HTML
     */
    public function upgrade_to_pro_iframe() {

        wp_enqueue_style('metaslider-admin-styles', METASLIDER_ADMIN_URL . 'assets/css/admin.css', false, METASLIDER_VERSION);
        wp_enqueue_script('google-font-api', 'https://fonts.googleapis.com/css?family=PT+Sans:400,700' , false, METASLIDER_VERSION);

        $link = apply_filters( 'metaslider_hoplink', 'https://www.metaslider.com/upgrade/' );
        $link .= '?utm_source=lite&amp;utm_medium=more-slide-types&amp;utm_campaign=pro';

        echo implode("", array(
            "<div class='metaslider_pro'>",
                "<p>Get the Pro Addon pack to add support for: <b>Post Feed</b> Slides, <b>YouTube</b> Slides, <b>HTML</b> Slides & <b>Vimeo</b> Slides</p>",
                "<a class='probutton' href='{$link}' target='_blank'>Get <span class='logo'><strong>Meta</strong>Slider</span><span class='super'>Pro</span></a>",
                "<span class='subtext'>Opens in a new window</span>",
            "</div>"
        ));

    }

    /**
     * Adds extra links to the plugin activation page
     *
     * @param  array  $meta   Extra meta links
     * @param  string $file   Specific file to compare against the base plugin
     * @param  string $data   Data for the meat links
     * @param  string $status Staus of the meta links
     * @return array          Return the meta links array
     */
    public function get_extra_meta_links($meta, $file, $data, $status) {

        if (plugin_basename(__FILE__) == $file) {
            $plugin_page = admin_url('admin.php?page=metaslider');
            $meta[] = "<a href='{$plugin_page}' onclick=\"event.preventDefault();var link = jQuery(this);jQuery.post(ajaxurl, {action: 'reset_tour_status', _wpnonce: metaslider_tour_nonce }, function(data) {window.location = link.attr('href');});\">" . __('Take a tour', 'ml-slider') . "</a>";
            if (metaslider_is_pro_installed()) {
                $upgrade_link = apply_filters('metaslider_hoplink', 'https://www.metaslider.com/upgrade/');
                $meta[] = "<a href='{$upgrade_link}' target='_blank'>" . __('Add-ons', 'ml-slider') . "</a>";
                $meta[] = "<a href='https://wordpress.org/support/plugin/ml-slider/' target='_blank'>" . __('Support', 'ml-slider') . "</a>";
            } else {
                $meta[] = "<a href='https://www.metaslider.com/support/' target='_blank'>" . __('Premium Support', 'ml-slider') . "</a>";
            }
            $meta[] = "<a href='https://www.metaslider.com/documentation/' target='_blank'>" . __('Documentation', 'ml-slider') . "</a>";
            $meta[] = "<a href='https://wordpress.org/support/plugin/ml-slider/reviews#new-post' target='_blank' title='" . __('Leave a review', 'ml-slider') . "'><i class='ml-stars'><svg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-star'><polygon points='12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2'/></svg><svg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-star'><polygon points='12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2'/></svg><svg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-star'><polygon points='12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2'/></svg><svg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-star'><polygon points='12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2'/></svg><svg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-star'><polygon points='12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2'/></svg></i></a>";
        }
        return $meta;
    }

   /**
    * Adds styles to admin head to allow for stars animation and coloring
    */
    public function add_star_styles() {
        if (metaslider_is_on_admin_page('plugins.php')) {?>
            <style>
                .ml-stars{display:inline-block;color:#ffb900;position:relative;top:3px}
                .ml-stars svg{fill:#ffb900}
                .ml-stars svg:hover{fill:#ffb900}
                .ml-stars svg:hover ~ svg{fill:none}
            </style>
    <?php }
    }

   /**
    * Add nonce to activation pa
    */
    public function add_tour_nonce_to_activation_page() {
        if (metaslider_is_on_admin_page('plugins.php')) {?>
            <script>
                var metaslider_tour_nonce = "<?php echo wp_create_nonce('metaslider_tour_nonce'); ?>";
            </script>
    <?php }
    }

    /**
     * Upgrade To Pro Button.
     *
     * @return string Returns a HTMl button
     */
     public function upgrade_to_pro_top_button() {
        $text = __('Upgrade Now', "ml-slider");
        $link = metaslider_get_upgrade_link();
        $upgrade_text = __("Get The Pro Pack Today!", "ml-slider");
        return "<a target='_blank' title='{$upgrade_text}' class='ml-has-icon ml-hanging-button' href='{$link}'><i class='brand-color'><svg xmlns='http://www.w3.org/2000/svg' width='17' height='17' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-star'><polygon points='12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2'/></svg></i><span>{$text}</span></a>";
    }
    
    /**
     * Toggle Layout Buttons.
     *
     * @return string returns html button
     */
    public function toggle_layout_button() {
        
        // Don't show this if there are no slideshows
        if (!count($this->all_meta_sliders())) {
            return '';
        }

        $view = ('tabs' == $this->get_view()) ? 'tabs' : 'dropdown';
        $view_opposite = ('dropdown' == $this->get_view()) ? 'tabs' : 'dropdown';
        $view_text = ($this->get_view() == 'tabs') ? __("Switch to Dropdown view", "ml-slider") : __("Switch to Tab view", "ml-slider");
        return "<a class='ml-has-icon ml-hanging-button' title='" . $view_text . "' 
        href='" . admin_url( "admin-post.php?action=metaslider_switch_view&view=".$view_opposite) . "'><i><svg xmlns=\"http://www.w3.org/2000/svg\" width=\"17\" height=\"17\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-shuffle\"><polyline points=\"16 3 21 3 21 8\"/><line x1=\"4\" y1=\"20\" x2=\"21\" y2=\"3\"/><polyline points=\"21 16 21 21 16 21\"/><line x1=\"15\" y1=\"15\" x2=\"21\" y2=\"21\"/><line x1=\"4\" y1=\"4\" x2=\"9\" y2=\"9\"/></svg></i><span>" . __("Layout", "ml-slider") . "</span></a>";
    }

    /**
     * Link to the comparison page button
     *
     * @return string returns html button
     */
    public function addons_page_button() {
        $link = admin_url('admin.php?page=upgrade');
        return "<a class='ml-has-icon ml-hanging-button' title='" . __('View Add-ons / Other Plugins', 'ml-slider') . "' href='{$link}'><i><svg xmlns=\"http://www.w3.org/2000/svg\" width=\"17\" height=\"17\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-clipboard\"><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"/><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"/></svg></i><span>" . __("Add-ons / Other Plugins", "ml-slider") . "</span></a>";
    }

    /**
     * Support and Docs Button
     *
     * @return string returns html button
     */
    public function documentation_button() {
        return "<a class='ml-has-icon ml-hanging-button' target='_blank' title='" . __('View The Documentation', 'ml-slider') . "' href='https://www.metaslider.com/documentation/'><i><svg xmlns=\"http://www.w3.org/2000/svg\" width=\"17\" height=\"17\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"feather feather-book\"><path d=\"M4 19.5A2.5 2.5 0 0 1 6.5 17H20\"/><path d=\"M6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15A2.5 2.5 0 0 1 6.5 2z\"/></svg></i><span>" . __("Documentation", "ml-slider") . "</span></a>";
    }

    /**
     * Add a 'property=stylesheet' attribute to the MetaSlider CSS links for HTML5 validation
     *
     * @since 3.3.4
     * @param string $tag    Specifies tag
     * @param string $handle Checks for the handle to add property to
     * @return string
     */
    public function add_property_attribute_to_stylesheet_links( $tag, $handle ) {

        if ( strpos( $handle, 'metaslider' ) !== FALSE && strpos( $tag, "property='" ) === FALSE ) {
            // we're only filtering tags with metaslider in the handle, and links which don't already have a property attribute
            $tag = str_replace( "/>", "property='stylesheet' />", $tag );
        }

        return $tag;

    }

}

endif;

add_action( 'plugins_loaded', array( 'MetaSliderPlugin', 'init' ), 10 );
