<?php

if (!defined('ABSPATH')) {
    die('No direct access.');
}

/**
 * Class to handle ajax endpoints, specifically used by vue components
 * If possible, keep logic here to a minimum.
 */
class MetaSlider_Api
{
    /**
     * Theme instance
     *
     * @var object
     * @see get_instance()
     */
    protected static $instance = null;

    /**
     * Constructor
     */
    public function __construct()
    {
    }

    /**
     * Setup
     */
    public function setup()
    {
        $this->slideshows = new MetaSlider_Slideshows();
        $this->themes = MetaSlider_Themes::get_instance();
    }

    /**
     * Used to access the instance
     */
    public static function get_instance()
    {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    /**
     * Register routes for admin ajax. Even if not used these can still be available.
     */
    public function register_admin_ajax_hooks()
    {

        // Slideshows
        add_action('wp_ajax_ms_get_slideshows', array(self::$instance, 'get_slideshows'));
        add_action('wp_ajax_ms_list_slideshows', array(self::$instance, 'list_slideshows'));
        add_action('wp_ajax_ms_get_single_slideshow', array(self::$instance, 'get_single_slideshow'));
        add_action('wp_ajax_ms_get_preview', array(self::$instance, 'get_preview'));
        add_action('wp_ajax_ms_delete_slideshow', array(self::$instance, 'delete_slideshow'));
        add_action('wp_ajax_ms_duplicate_slideshow', array(self::$instance, 'duplicate_slideshow'));
        add_action('wp_ajax_ms_save_slideshow', array(self::$instance, 'save_slideshow'));
        add_action('wp_ajax_ms_search_slideshows', array(self::$instance, 'search_slideshows'));
        add_action('wp_ajax_ms_export_slideshows', array(self::$instance, 'export_slideshows'));
        add_action('wp_ajax_ms_import_slideshows', array(self::$instance, 'import_slideshows'));

        // Themes
        add_action('wp_ajax_ms_get_all_free_themes', array(self::$instance, 'get_all_free_themes'));
        add_action('wp_ajax_ms_get_custom_themes', array(self::$instance, 'get_custom_themes'));
        add_action('wp_ajax_ms_set_theme', array(self::$instance, 'set_theme'));

        // Slides
        add_action('wp_ajax_ms_import_images', array(self::$instance, 'import_images'));

        // Settings
        add_action('wp_ajax_ms_update_user_setting', array(self::$instance, 'save_user_setting'));
        add_action('wp_ajax_ms_update_all_slideshow_settings', array(self::$instance, 'save_all_slideshow_settings'));
        add_action('wp_ajax_ms_update_single_slideshow_setting', array(self::$instance, 'save_single_slideshow_setting'));
        add_action('wp_ajax_ms_get_slideshow_default_settings', array(self::$instance, 'get_slideshow_default_settings'));
        add_action('wp_ajax_ms_save_slideshow_default_settings', array(self::$instance, 'save_slideshow_default_settings'));

        // Global settings
        add_action('wp_ajax_ms_get_single_setting', array(self::$instance, 'get_single_setting'));
        add_action('wp_ajax_ms_get_global_settings', array(self::$instance, 'get_global_settings'));
        add_action('wp_ajax_ms_update_global_settings', array(self::$instance, 'save_global_settings'));
        add_action('wp_ajax_ms_update_global_settings_single', array(self::$instance, 'save_global_settings_single'));

        // Other
        add_action('wp_ajax_set_tour_status', array(self::$instance, 'set_tour_status'));
        add_action('wp_ajax_ms_get_image_ids_from_filenames', array(self::$instance, 'get_image_ids_from_file_name'));
    }

    /**
     * Helper function to verify access
     *
     * @return boolean
     */
    public function can_access()
    {
        $capability = apply_filters('metaslider_capability', MetaSliderPlugin::DEFAULT_CAPABILITY_EDIT_SLIDES);

        // Check for the nonce on the server (used by WP REST)
        if (isset($_SERVER['HTTP_X_WP_NONCE']) && wp_verify_nonce(sanitize_key($_SERVER['HTTP_X_WP_NONCE']), 'wp_rest')) {
            return current_user_can($capability);
        }

        // This is for when not using Axios (example: callout.php)
        if (isset($_REQUEST['METASLIDER_NONCE']) && wp_verify_nonce(sanitize_key($_REQUEST['METASLIDER_NONCE']), 'metaslider_request')) {
            return current_user_can($capability);
        }

        return false;
    }

    /**
     * Helper function to return an access denied response
     */
    public function deny_access()
    {
        wp_send_json_error(array(
            'message' => __('You do not have access to this resource.', 'ml-slider')
        ), 401);
    }

    /**
     * Helper function to get data from the request
     * (supports rest & admin-ajax)
     * Does not handle any validation
     *
     * @param object $request    The request
     * @param array  $parameters The wanted parameters
     * @return array
     */
    public function get_request_data($request, $parameters)
    {
        $results = array();
        foreach ($parameters as $param) {
            if (method_exists($request, 'get_param')) {
                $results[$param] = $request->get_param($param);
            } else {
                $results[$param] = isset($_REQUEST[$param]) ? stripslashes_deep(sanitize_text_field($_REQUEST[$param])) : null;
            }
        }

        return $results;
    }

    /**
     * Returns all slideshows
     *
     * @param object|null $request The request
     */
    public function get_slideshows($request = null)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('page', 'count'));
        $page = isset($data['page']) ? intval($data['page']) : 1;
        $count = isset($data['count']) ? intval($data['count']) : 25;

        $slideshows = $this->slideshows->get($count, $page);

        $slideshows = array_map(array($this, 'get_slide_data'), $slideshows);

        if (is_wp_error($slideshows)) {
            wp_send_json_error(array(
                'message' => $slideshows->get_error_message()
            ), 400);
        }

        wp_send_json_success($slideshows, 200);
    }

    /**
     * Returns all slideshows
     *
     * @param object|null $request The request
     */
    public function search_slideshows($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('term', 'count'));

        $slideshows = $this->slideshows->search((string) $data['term'], (string) $data['count']);

        $slideshows = array_map(array($this, 'get_slide_data'), $slideshows);

        if (is_wp_error($slideshows)) {
            wp_send_json_error(array(
                'message' => $slideshows->get_error_message()
            ), 400);
        }

        wp_send_json_success($slideshows, 200);
    }

    /**
     * Returns a list of all slideshows
     *
     * @param object|null $request The request
     */
    public function list_slideshows($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $slideshows = $this->slideshows->get_all_slideshows();

        if (is_wp_error($slideshows)) {
            wp_send_json_error(array(
                'message' => $slideshows->get_error_message()
            ), 400);
        }

        wp_send_json_success($slideshows, 200);
    }

    /**
     * Returns a single slideshow
     *
     * @param object $request The request
     */
    public function get_single_slideshow($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('id'));

        $slideshow = $this->slideshows->get_single($data['id']);

        $slideshow = array_map(array($this, 'get_slide_data'), $slideshow);

        if (is_wp_error($slideshow)) {
            wp_send_json_error(array(
                'message' => $slideshow->get_error_message()
            ), 400);
        }

        wp_send_json_success($slideshow, 200);
    }

    /**
     * Maps some slide data to the slideshow
     *
     * @param array $slideshow - a slideshow
     *
     * @return array
     */
    private function get_slide_data($slideshow)
    {
        if (isset($slideshow['slides'])) {
            foreach ($slideshow['slides'] as $order => $slide_id) {
                $thumbnail_id = 'attachment' === get_post_type($slide_id) ? $slide_id : get_post_thumbnail_id($slide_id);
                $thumbnail_data = wp_get_attachment_image_src($thumbnail_id);

                unset($slideshow['slides'][$order]);
                $slideshow['slides'][$order] = array(
                    'id' => $slide_id,
                    'thumbnail' => isset($thumbnail_data[0]) ? $thumbnail_data['0'] : '',
                    'post_excerpt' => get_post_field('post_excerpt', $slide_id),
                    'order' => $order,
                    'meta' =>  array()
                );
                foreach (get_post_meta($slide_id) as $metakey => $value) {
                    $slideshow['slides'][$order]['meta'][$metakey] = $value[0];
                }
            }
            $slideshow['slides'] = array_values($slideshow['slides']);
        }

        return $slideshow;
    }

    /**
     * Returns all custom themes
     */
    public function get_custom_themes()
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $themes = $this->themes->get_custom_themes();

        if (is_wp_error($themes)) {
            wp_send_json_error(array(
                'message' => $themes->get_error_message()
            ), 400);
        }

        wp_send_json_success($themes, 200);
    }

    /**
     * Returns all themes
     */
    public function get_all_free_themes()
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $themes = $this->themes->get_all_free_themes();

        if (is_wp_error($themes)) {
            wp_send_json_error(array(
                'message' => $themes->get_error_message()
            ), 400);
        }

        wp_send_json_success($themes, 200);
    }

    /**
     * Sets a specific theme
     *
     * @param object $request The request
     */
    public function set_theme($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id', 'theme'));

        $response = $this->themes->set(absint($data['slideshow_id']), (array) $data['theme']);

        if (!$response) {
            wp_send_json_error(array(
                'message' => 'There was an issue while attempting to save the theme. Please refresh and try again.'
            ), 400);
        }

        // If we made it this far, return the theme data
        wp_send_json_success((array) $data['theme'], 200);
    }

    /**
     * Returns the preview HTML
     *
     * @param object $request The request
     */
    public function get_preview($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id', 'theme_id'));

        // The theme id can be either a string or null, exit if it's something else
        if (!is_null($data['theme_id']) && !is_string($data['theme_id'])) {
            wp_send_json_error(array(
                'message' => __('The request format was not valid.', 'ml-slider')
            ), 415);
        }

        // If the slideshow was deleted
        $slideshow = get_post($data['slideshow_id']);
        if ('publish' !== $slideshow->post_status) {
            wp_send_json_error(array(
                'message' => __('This slideshow is no longer available.', 'ml-slider')
            ), 410);
        }

        $html = $this->slideshows->preview(
            absint($data['slideshow_id']),
            $data['theme_id']
        );

        if (is_wp_error($html)) {
            wp_send_json_error(array(
                'message' => $html->get_error_message()
            ), 400);
        }

        wp_send_json_success($html, 200);
    }

    /**
     * Duplicate a slideshow
     *
     * @param object $request The request
     */
    public function duplicate_slideshow($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id'));

        $new_slideshow = $this->slideshows->duplicate(absint($data['slideshow_id']));

        if (is_wp_error($new_slideshow)) {
            wp_send_json_error(array(
                'message' => $new_slideshow->get_error_message()
            ), 400);
        }

        wp_send_json_success($new_slideshow, 200);
    }

    /**
     * Export slideshows
     *
     * @param object $request The request
     */
    public function export_slideshows($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_ids'));

        $export = $this->slideshows->export((array) json_decode($data['slideshow_ids'], true));

        if (is_wp_error($export)) {
            wp_send_json_error(array(
                'message' => $export->get_error_message()
            ), 400);
        }

        if (defined('SCRIPT_DEBUG') && SCRIPT_DEBUG) {
            // @codingStandardsIgnoreLine
            echo wp_json_encode($export, JSON_PRETTY_PRINT);
            die;
        }

        wp_send_json($export, 200);
    }

    /**
     * Import slideshows
     *
     * @param object $request The request
     */
    public function import_slideshows($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshows'));

        if (!$data['slideshows']) {
            wp_send_json_error(array(
                'message' => __('Nothing to import.', 'ml-slider')
            ), 400);
        }

        $status = $this->slideshows->import((array) json_decode($data['slideshows'], true));

        if (is_wp_error($status)) {
            wp_send_json_error(array(
                'message' => $status->get_error_message()
            ), 400);
        }

        wp_send_json_success($status, 200);
    }

    /**
     * Delete a slideshow
     *
     * @param object $request The request
     */
    public function delete_slideshow($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id', 'slider_id'));

        // Backwards compatability for slider_id param
        $slideshow_id = is_null($data['slideshow_id']) ? $data['slider_id'] : $data['slideshow_id'];

        // If the slideshow was deleted
        $slideshow = get_post($slideshow_id);
        if ('publish' !== $slideshow->post_status) {
            wp_send_json_error(array(
                'message' => __('This slideshow is no longer available.', 'ml-slider')
            ), 410);
        }

        // Confirm it's one of ours
        if ('ml-slider' !== get_post_type($slideshow_id)) {
            wp_send_json_error(array(
                'message' => __('This was not a slideshow, so we cannot delete it.', 'ml-slider')
            ), 409);
        }

        $next_slideshow = $this->slideshows->delete(absint($slideshow_id));

        if (is_wp_error($next_slideshow)) {
            wp_send_json_error(array(
                'message' => 'There was an issue while attempting delete the slideshow. Please refresh and try again.'
            ), 400);
        }

        wp_send_json_success($next_slideshow, 200);
    }

    /**
     * Save a slideshow
     *
     * @param object $request The request
     */
    public function save_slideshow($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id', 'attachment', 'count'));

        // If we are missing the count, then it's likely the payload was truncated
        if (!$data['count'] && version_compare(phpversion(), '5.3.9', '>=')) {
            // If the input vars count is close to the max allowed, assume that the data was truncated and inform the user to increase the value
            // phpcs:ignore WordPress.Security.NonceVerification.Missing
            $current_vars = count($_POST, COUNT_RECURSIVE);
            if (($current_vars + 50) > ini_get('max_input_vars')) { // phpcs:ignore PHPCompatibility.IniDirectives.NewIniDirectives.max_input_varsFound
                wp_send_json_error(array(
                    'current_input_vars' => $current_vars
                ), 400);
            }
        }

        try {
            // phpcs:ignore WordPress.Security.NonceVerification.Missing
            if (isset($data['attachment'])) {
                foreach ($data['attachment'] as $slide_id => $fields) {
                    $fields = $this->sanitize_files_array($fields);

                    $slide_id = (int)$slide_id;

                    // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
                    do_action("metaslider_save_{$fields['type']}_slide", $slide_id, $data['slideshow_id'], $fields);
                }
            }
        } catch (Exception $e) {
            wp_send_json_error(array('message' => $e->getMessage()), 400);
        }

        wp_send_json_success('OK', 200);
    }

    private function sanitize_files_array($fields)
    {
        if (isset($fields['caption_source'])) {
            $fields['caption_source'] = sanitize_text_field($fields['caption_source']);
        }

        if (isset($fields['post_excerpt'])) {
            $fields['post_excerpt'] = wp_filter_post_kses($fields['post_excerpt']);
        }

        if (isset($fields['url'])) {
            $fields['url'] = sanitize_url($fields['url']);
        }

        if (isset($fields['inherit_image_title'])) {
            $fields['inherit_image_title'] = sanitize_text_field($fields['inherit_image_title']);
        }

        if (isset($fields['title'])) {
            $fields['title'] = sanitize_text_field($fields['title']);
        }

        if (isset($fields['inherit_image_alt'])) {
            $fields['inherit_image_alt'] = sanitize_text_field($fields['inherit_image_alt']);
        }

        if (isset($fields['alt'])) {
            $fields['alt'] = sanitize_text_field($fields['alt']);
        }

        if (isset($fields['crop_position'])) {
            $fields['crop_position'] = sanitize_text_field($fields['crop_position']);
        }

        if (isset($fields['type'])) {
            $fields['type'] = sanitize_text_field($fields['type']);
        }

        if (isset($fields['menu_order'])) {
            $fields['menu_order'] = sanitize_text_field($fields['menu_order']);
        }

        if (isset($fields['new_window'])) {
            $fields['new_window'] = sanitize_text_field($fields['new_window']);
        }

        return $fields;
    }

    /**
     * Update tour status
     *
     * @param object $request The request
     */
    public function set_tour_status($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('current_step'));

        // This wont provide a useful return
        update_option('metaslider_tour_cancelled_on', $data['current_step']);

        wp_send_json_success('OK', 200);
    }

    /**
     * Update a single seting specific to a slideshow
     *
     * @param object $request The request
     */
    public function save_single_slideshow_setting($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id', 'setting_key', 'setting_value'));

        // Confirm it's one of ours
        if ('ml-slider' !== get_post_type($data['slideshow_id'])) {
            wp_send_json_error(array(
                'message' => __('This was not a slideshow, so we cannot update the setting.', 'ml-slider')
            ), 409);
        }

        // If it's the title, process
        if ('title' === $data['setting_key']) {
            wp_update_post(array(
                'ID' => absint($data['slideshow_id']),
                'post_title'  => (string) $data['setting_value']
            ));
            return wp_send_json_success('OK', 200);
        }

        // This wont provide a useful return
        update_post_meta($data['slideshow_id'], $data['setting_key'], $data['setting_value']);

        wp_send_json_success('OK', 200);
    }

    /**
     * Update all settings on a slideshow
     *
     * @param object $request The request
     */
    public function save_all_slideshow_settings($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id', 'settings'));

        $result = $this->slideshows->save(
            absint($data['slideshow_id']),
            (array) $data['settings']
        );

        if (is_wp_error($result)) {
            wp_send_json_error(array(
                'message' => 'There was an issue while attempting delete the slideshow. Please refresh and try again.'
            ), 400);
        }

        wp_send_json_success($result, 200);
    }

    /**
     * Update a global user setting
     *
     * @param object $request The request
     */
    public function save_user_setting($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('setting_key', 'setting_value'));

        // Ensure the key is prefixed
        $key = $data['setting_key'];
        $key = (0 === strpos($key, 'metaslider_')) ? $key : 'metaslider_' . $key;

        // This will not provide a useful return (reminder, key is prefixed)
        update_user_option(get_current_user_id(), $key, $data['setting_value']);

        wp_send_json_success('OK', 200);
    }

    /**
     * Get default settings
     */
    public function get_slideshow_default_settings()
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }
        wp_send_json_success(MetaSlider_Slideshow_Settings::defaults(), 200);
    }

    /**
     * Save setting defaults
     *
     * @param object $request The request
     */
    public function save_slideshow_default_settings($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('settings'));
        $settings = json_decode($data['settings'], true);

        // These settings should include a title and not be empty
        if (!isset($settings['title'])) {
            wp_send_json_error(array('message' => __('The title cannot be empty.', 'ml-slider')), 422);
        }
        foreach ($settings as $key => $value) {
            if ($value === '') {
                wp_send_json_error(array('message' => sprintf(__('The field (%s) cannot be empty', 'ml-slider'), $key)), 422);
            }
        }

        // This will not provide a useful return
        update_option('metaslider_default_settings', $settings);

        wp_send_json_success($settings, 200);
    }

    /**
     * Get a single setting
     *
     * @param object $request The request
     */
    public function get_single_setting($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }
        $data = $this->get_request_data($request, array('setting'));

        $key = (0 === strpos($data['setting'], 'metaslider_')) ? $data['setting'] : 'metaslider_' . $data['setting'];
        if ($setting = get_option($key)) {
            return wp_send_json_success($setting, 200);
        }

        wp_send_json_success(array(), 200);
    }

    /**
     * Get global settings whether multisite or not
     */
    public function get_global_settings()
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        if (is_multisite() && $settings = get_site_option('metaslider_global_settings')) {
            return wp_send_json_success($settings, 200);
        }

        if ($settings = get_option('metaslider_global_settings')) {
            return wp_send_json_success($settings, 200);
        }

        wp_send_json_success(array(), 200);
    }

    /**
     * Save global settings whether multisite or other
     *
     * @param object $request The request
     */
    public function save_global_settings($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('settings'));
        $settings = json_decode($data['settings'], true);

        // TODO: validate the license if not ''

        // If the user has opted out, clean up. If they opt in, that will load on next WP reload
        if (!isset($settings['optIn']) || (isset($settings['optIn']) && !filter_var($settings['optIn'], FILTER_VALIDATE_BOOLEAN))) {
            if (!class_exists('MetaSlider_Analytics')) {
                require_once(METASLIDER_PATH . 'admin/support/Analytics.php');
            }
            $analytics = new MetaSlider_Analytics();
            $analytics->optout();

            // This includes a setting "metaslider_user_explicitly_opted_out" which can be used elsewhere to
            // say "Hey, this user actually pressed the button to enable or disable their 'opt' preference"
            update_option('metaslider_user_explicitly_opted_out', get_current_user_id() . ':' . time(), true);
        }

        update_option('metaslider_global_settings', $settings, true);

        // This is meant to keep track of the user who opted in last. This is so that the user is
        // able to understand exactly when the optin occured and by whom exactly.
        if (isset($settings['optIn']) && filter_var($settings['optIn'], FILTER_VALIDATE_BOOLEAN)) {
            $analytics = new MetaSlider_Analytics();
            $analytics->optin();
        }

        wp_send_json_success($settings, 200);
    }

    /**
     * Update a global single setting
     *
     * @param object $request The request
     */
    public function save_global_settings_single($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('setting_key', 'setting_value'));

        // Ensure the key is prefixed (ie only allow access to metaslider_ settings)
        $key = $data['setting_key'];
        $key = (0 === strpos($key, 'metaslider_')) ? $key : 'metaslider_' . $key;

        // This will not provide a useful return (reminder, key is prefixed)
        update_option($key, $data['setting_value'], true);

        wp_send_json_success('OK', 200);
    }

    /**
     * Get ids of images based on filename. Used during import
     *
     * @param object $request The request
     */
    public function get_image_ids_from_file_name($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('filenames'));
        $images = MetaSlider_Image::get_image_ids_from_file_name(json_decode($data['filenames'], true));
        wp_send_json_success($images, 200);
    }

    /**
     * Import theme images
     *
     * @param object $request The request
     */
    public function import_images($request)
    {
        if (!$this->can_access()) {
            $this->deny_access();
        }

        $data = $this->get_request_data($request, array('slideshow_id', 'theme_id', 'slide_id', 'image_data'));

        // Create a slideshow if one doesn't exist
        if (is_null($data['slideshow_id']) || !absint($data['slideshow_id'])) {
            $data['slideshow_id'] = MetaSlider_Slideshows::create();
            if (is_wp_error($data['slideshow_id'])) {
                wp_send_json_error(array('message' => $data['slideshow_id']->getMessage()), 400);
            }
        }

        // If there are files here, then we need to prepare them
        // Dont use get_file_params() as it's WP4.4
        // phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized
        $images = isset($_FILES['files']) ? $this->process_uploads($_FILES['files'], $data['image_data']) : array();

        // $images should be an array of image data at this point
        // Capture the slide markup that is typically echoed from legacy code
        ob_start();

        $image_ids = MetaSlider_Image::instance()->import($images, $data['theme_id']);
        if (is_wp_error($image_ids)) {
            wp_send_json_error(array(
                'message' => $image_ids->get_error_message()
            ), 400);
        }

        $errors = array();
        $method = is_null($data['slide_id']) ? 'create_slide' : 'update';
        foreach ($image_ids as $image_id) {
            $slide = new MetaSlider_Slide(absint($data['slideshow_id']), $data['slide_id']);
            $slide->add_image($image_id)->$method();
            if (is_wp_error($slide->error)) {
                array_push($errors, $slide->error);
            }
        }

        // Disregard the output. It's not needed for imports
        ob_end_clean();

        // Send back the first error, if any
        if (isset($errors[0])) {
            wp_send_json_error(array(
                'message' => $errors[0]->get_error_message()
            ), 400);
        }

        wp_send_json_success(wp_get_attachment_thumb_url($slide->slide_data['id']), 200);
    }

    /**
     * Verify uploads are useful and return an array with metadata
     * For now only handles images.
     *
     * @param array $files An array of the images
     * @param array $data  Data for the image, keys should match
     *
     * @return array An array with image data
     */
    public function process_uploads($files, $data = null)
    {
        $images = array();
        foreach ($files['tmp_name'] as $index => $tmp_name) {
            // If there was an error, skip this file
            // TODO: consider reporting an error back to the user, but skipping might be best
            if (!empty($files['error'][$index])) {
                continue;
            }

            // If the name is empty or isn't an uploaded file, skip it
            if (empty($tmp_name) || !is_uploaded_file($tmp_name)) {
                continue;
            }

            // For now there's no reason to import anything but images
            if (!strstr(mime_content_type($tmp_name), "image/")) {
                continue;
            }

            // Ignore images too large for the server (According to WP)
            // The server probably handles this already
            // TODO: possibly provide user feedback, but skipping moves forward
            $max_upload_size = wp_max_upload_size();
            if (!$max_upload_size) {
                $max_upload_size = 0;
            }
            $file_size = $files['size'][$index];
            if ($file_size > $max_upload_size) {
                continue;
            }

            // Tests were passed, so move forward with this image
            $filename = $files['name'][$index];
            $images[$filename] = array(
                'source' => sanitize_text_field($tmp_name),
                'caption' => isset($data[$filename]['caption']) ? sanitize_text_field($data[$filename]['caption']) : '',
                'title' => isset($data[$filename]['title']) ? sanitize_text_field($data[$filename]['title']) : '',
                'description' => isset($data[$filename]['description']) ? sanitize_text_field($data[$filename]['description']) : '',
                'alt' => isset($data[$filename]['alt']) ? sanitize_text_field($data[$filename]['alt']) : ''
            );
        }
        return $images;
    }
}

if (class_exists('WP_REST_Controller')) :
    /**
     * Class to handle REST route api endpoints.
     */
    class MetaSlider_REST_Controller extends WP_REST_Controller
    {
        /**
         * Namespace and version for the API
         *
         * @var string
         */
        protected $namespace = 'metaslider/v1';

        /**
         * Constructor
         */
        public function __construct()
        {
            add_action('rest_api_init', array($this, 'register_routes'));
            $this->api = MetaSlider_Api::get_instance();
            $this->api->setup();
        }

        /**
         * Register routes
         */
        public function register_routes()
        {
            register_rest_route($this->namespace, '/slideshow/all', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_slideshows'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/list', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'list_slideshows'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/single', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_single_slideshow'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/preview', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_preview'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/save', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'save_slideshow'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/delete', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'delete_slideshow'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/duplicate', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'duplicate_slideshow'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/search', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'search_slideshows'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/export', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'export_slideshows'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/slideshow/import', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'import_slideshows'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/themes/all', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_all_free_themes'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/themes/custom', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_custom_themes'),
                'permission_callback' => array($this->api, 'can_access')
            )));
            register_rest_route($this->namespace, '/themes/set', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'set_theme'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/import/images', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'import_images'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/tour/status', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'set_tour_status'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/user/save', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'save_user_setting'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/global/save', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'save_global_settings'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/global/single/save', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'save_global_settings_single'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/single', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_single_setting'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/global', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_global_settings'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/slideshow/save', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'save_all_slideshow_settings'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/slideshow/save-single', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'save_single_slideshow_setting'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/slideshow/defaults', array(array(
                'methods' => 'GET',
                'callback' => array($this->api, 'get_slideshow_default_settings'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/settings/slideshow/defaults/save', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'save_slideshow_default_settings'),
                'permission_callback' => array($this->api, 'can_access')
            )));

            register_rest_route($this->namespace, '/images/ids-from-filenames', array(array(
                'methods' => 'POST',
                'callback' => array($this->api, 'get_image_ids_from_file_name'),
                'permission_callback' => array($this->api, 'can_access')
            )));
        }
    }
endif;
