cleverpush.php

<?php
/*
Plugin Name: CleverPush
Plugin URI: https://cleverpush.com
Description: Send push notifications to your users right through your website. Visit <a href="https://cleverpush.com">CleverPush</a> for more details.
Author: CleverPush
Version: 1.9.8
Author URI: https://cleverpush.com
Text Domain: cleverpush
Domain Path: /languages
*/

if (!defined('ABSPATH')) {
    exit;
}

require_once 'cleverpush-api.php';

if (! class_exists('CleverPush') ) :
    class CleverPush
    {
        /**
         * Version of the capabilities
         * 
         * @var string
         */
        private $capabilities_version;

        /**
         * Construct the plugin.
         */
        public function __construct()
        {
            $this->capabilities_version = '1.0';

            add_site_option('cleverpush_capabilities_version', '0');

            add_action('plugins_loaded', array($this, 'init'));
            add_action('wp_head', array($this, 'javascript'), 20);
            add_action('admin_menu', array($this, 'plugin_menu'));
            add_action('admin_init', array($this, 'register_settings'));
            add_action('init', array($this, 'register_post_types'));
            add_action('admin_notices', array($this, 'warn_nosettings'));
            add_action('add_meta_boxes', array($this, 'create_metabox'));
            add_action('save_post', array($this, 'save_post'), 10, 2);
            add_action('admin_notices', array($this, 'notices'));

            add_action('publish_post', array($this, 'publish_post'), 10, 1);
            $post_types = get_option('cleverpush_post_types');
            if (!empty($post_types)) {
                foreach ($post_types as $post_type) {
                    add_action('publish_' . $post_type, array($this, 'publish_post'), 10, 1);
                }
            }

            add_action('admin_enqueue_scripts', array($this, 'load_admin_style'));

            add_action('wp_ajax_cleverpush_send_options', array($this, 'ajax_load_options'));

            add_action('wp_ajax_cleverpush_subscription_id', array($this, 'set_subscription_id'));
            add_action('wp_ajax_nopriv_cleverpush_subscription_id', array($this, 'set_subscription_id'));

            add_action('wp_ajax_cleverpush_users_plan', array($this, 'get_users_plan'));
            add_action('wp_ajax_cleverpush_ai_generation', array($this, 'get_ai_generation'));

            add_action('single_template', array($this, 'cleverpush_story_template' ), 20, 1);
            add_action('frontpage_template', array($this, 'cleverpush_story_template' ), 11);

            add_filter('plugin_action_links_' . plugin_basename(__FILE__), array($this, 'plugin_add_settings_link'));

            add_action('rss2_item', array($this, 'cleverpush_rss_item'));

            if (!is_admin() 
                && get_option('cleverpush_preview_access_enabled') == 'on' 
                && !empty(get_option('cleverpush_apikey_private'))
            ) {
                add_filter('pre_get_posts', array($this, 'show_public_preview'));
                add_filter('query_vars', array($this, 'add_query_var'));
                add_filter('wpseo_whitelist_permalink_vars', array($this, 'add_query_var'));
            }

            if (get_option('cleverpush_amp_enabled') == 'on'
            ) {
                // Standard mode
                add_action('wp_head', array($this, 'amp_head_css'));
                if (function_exists('wp_body_open')) {
                    add_action('wp_body_open', array($this, 'amp_post_template_body_open'));
                } else {
                    add_action('wp_footer', array($this, 'amp_post_template_body_open'));
                }
                add_action('wp_footer', array($this, 'amp_post_template_footer'));
                // Classic mode
                add_action('amp_post_template_css', array($this, 'amp_post_template_css'));
                add_action('amp_post_template_body_open', array($this, 'amp_post_template_body_open'));
                add_action('amp_post_template_footer', array($this, 'amp_post_template_footer'));
            }

            load_plugin_textdomain(
                'cleverpush',
                false,
                dirname(plugin_basename(__FILE__)) . '/languages/'
            );

            register_activation_hook(__FILE__, array($this, 'cleverpush_activate'));
            register_deactivation_hook(__FILE__, array($this, 'cleverpush_deactivate'));
        }

        function cleverpush_activate()
        {
            if (! get_option('cleverpush_flush_rewrite_rules_flag') ) {
                add_option('cleverpush_flush_rewrite_rules_flag', true);
            }

            $this->add_capabilities();
        }

        function cleverpush_deactivate()
        {
            flush_rewrite_rules(); // phpcs:ignore

            $this->remove_capabilities();
        }

        function add_capabilities()
        {
            if (! function_exists('get_editable_roles') ) {
                include_once ABSPATH . 'wp-admin/includes/user.php';
            }
            $roles = get_editable_roles();
            foreach ($GLOBALS['wp_roles']->role_objects as $key => $role) {
                if (isset($roles[$key]) && $role->has_cap('edit_posts')) {
                    $role->add_cap('cleverpush_send');
                }
                if (isset($roles[$key]) && $role->has_cap('create_users')) {
                    $role->add_cap('cleverpush_settings');
                }
            }

            update_site_option('cleverpush_capabilities_version', $this->capabilities_version);
        }

        function remove_capabilities()
        {
            if (! function_exists('get_editable_roles') ) {
                include_once ABSPATH . 'wp-admin/includes/user.php';
            }
            $roles = get_editable_roles();
            foreach ($GLOBALS['wp_roles']->role_objects as $key => $role) {
                if (isset($roles[$key]) && $role->has_cap('cleverpush_send')) {
                    $role->remove_cap('cleverpush_send');
                }
                if (isset($roles[$key]) && $role->has_cap('cleverpush_settings')) {
                    $role->remove_cap('cleverpush_settings');
                }
            }
        }

        function load_admin_style()
        {
            wp_enqueue_style('admin_css', plugin_dir_url(__FILE__) . 'cleverpush-admin.css', false, '1.0.0');
        }

        /**
         * Initialize the plugin.
         */
        public function init()
        {
            if (get_site_option('cleverpush_capabilities_version') != $this->capabilities_version) {
                $this->add_capabilities();
            }
        }

        function get_users_plan()
        {
            $api_key_private = get_option('cleverpush_apikey_private');

            if (empty($api_key_private)) {
                wp_send_json_error(array('message' => 'No API key found'), 403);
            }

            $response = wp_remote_get(
                CLEVERPUSH_API_ENDPOINT . '/user',
                array(
                    'timeout' => 20, // phpcs:ignore
                    'headers' => array(
                        'authorization' => $api_key_private
                    )
                )
            );

            if (is_wp_error($response)) {
                wp_send_json_error($response->get_error_message());
            }
            else {
                $body = wp_remote_retrieve_body($response);
                $data = json_decode($body);

                if (isset($data->user) && isset($data->user->plan)) {
                    wp_send_json($data->user->plan);
                }
                else {
                    wp_send_json_error(array('message' => 'No plan found'), 500);
                }
            }

            wp_die();
        }

        function get_ai_generation()
        {
            if (empty($_POST['post_id']) || empty($_POST['title']) || empty($_POST['text'])) {
                wp_send_json_error(array('message' => 'Invalid request'), 400);
            }

            $post_id = sanitize_text_field(wp_unslash($_POST['post_id']));
            $title = sanitize_text_field(wp_unslash($_POST['title']));
            $text = sanitize_text_field(wp_unslash($_POST['text']));
            $permalink = get_permalink($post_id);

            $api_key_private = get_option('cleverpush_apikey_private');

            if (empty($api_key_private)) {
                wp_send_json_error(array('message' => 'No API key found'), 403);
            }

            $response = wp_remote_post(
                CLEVERPUSH_API_ENDPOINT . '/ai-generation',
                array(
                    'timeout' => 20, // phpcs:ignore
                    'headers' => array(
                        'authorization' => $api_key_private,
                        'content-type' => 'application/json'
                    ),
                    'body' => wp_json_encode(array(
                        'title' => $title,
                        'text' => $text,
                        'url' => $permalink
                    ))
                )
            );

            if (is_wp_error($response)) {
                wp_send_json_error($response->get_error_message());
            }
            else {
                $body = wp_remote_retrieve_body($response);
                wp_send_json(json_decode($body));
            }

            wp_die();
        }

        public function warn_nosettings()
        {
            if (!is_admin()) {
                return;
            }

            if (empty(get_option('cleverpush_channel_id'))) {
                echo wp_kses(
                    '<div class="updated fade"><p><strong>' . __('CleverPush is almost ready.', 'cleverpush') . '</strong> ' . sprintf(__('You have to select a channel in the %s to get started.', 'cleverpush'), '<a href="options-general.php?page=cleverpush_options">' . __('settings', 'cleverpush') . '</a>') . '</p></div>',
                    array(
                      'div' => array(
                        'class' => array()
                      ),
                      'p' => array(),
                      'strong' => array(),
                      'a' => array(
                        'href' => array()
                      )
                    )
                );
            }
        }

        public function register_post_types()
        {
            if (get_option('cleverpush_stories_enabled') == 'on') {
                $labels = array(
                'menu_name' => _x('CP Stories', 'post type general name', 'cleverpush'),
                'name' => _x('CleverPush Stories', 'post type general name', 'cleverpush'),
                'singular_name' => _x('Story', 'post type singular name', 'cleverpush'),
                'add_new' => _x('Neue Story', 'portfolio item', 'cleverpush'),
                'add_new_item' => __('Neue Story hinzufügen', 'cleverpush'),
                'edit_item' => __('Story bearbeiten', 'cleverpush'),
                'new_item' => __('Neue Story', 'cleverpush'),
                'view_item' => __('Story ansehen', 'cleverpush'),
                'search_items' => __('Stories suchen', 'cleverpush'),
                'not_found' =>  __('Nichts gefunden', 'cleverpush'),
                'not_found_in_trash' => __('Nichts gefunden', 'cleverpush'),
                'parent_item_colon' => '',
                'all_items' =>  __('Stories', 'cleverpush'),
                );

                $args = array(
                'labels' => $labels,
                'public' => true,
                'show_ui' => true,
                'capability_type' => 'post',
                'hierarchical' => false,
                'menu_position' => null,
                'supports' => false,
                'rewrite' => array('slug' => 'cleverpush-stories','with_front' => false),
                );

                register_post_type('cleverpush_story', $args);
            }

            if (get_option('cleverpush_flush_rewrite_rules_flag') ) {
                flush_rewrite_rules(); // phpcs:ignore
                delete_option('cleverpush_flush_rewrite_rules_flag');
            }
        }

        public function cleverpush_story_id_meta()
        {
            ?>

            <div class="wrap">
                <table class="form-table">

            <?php
            global $post;
            $custom = get_post_custom($post->ID);
            $apiKey = get_option('cleverpush_apikey_private');
            $channelId = get_option('cleverpush_channel_id');
            $cleverpushStoryId = $custom['cleverpush_story_id'][0];
            $fetchTime = get_transient('cleverpush_story_' . $cleverpushStoryId . '_time');

            if (!empty($apiKey)) {
                $response = wp_remote_get('https://api.cleverpush.com/channel/' . $channelId . '/stories', array( 'headers' => array( 'Authorization' => $apiKey ) ));
                if (is_wp_error($response)) {
                    ?>
                            <div class="error notice">
                                <p><?php echo esc_html($response->get_error_message()); ?></p>
                            </div>
                         <?php
                }
                else if ($response['response']['code'] == 200 && isset($response['body'])) {
                        $stories = json_decode($response['body'])->stories;
                    if ($stories && count($stories) > 0) {
                        ?>

                                <tr valign="top">
                                    <th scope="row">Story auswählen</th>
                                    <td>
                                        <select name="cleverpush_story_id">
                                            <option value="" disabled<?php echo esc_attr(empty($cleverpushStoryId) ? ' selected' : ''); ?>>Bitte Story auswählen…</option>
                                            <?php
                                            foreach ( $stories as $story ) {
                                                ?>
                                                <option value="<?php echo esc_attr($story->_id); ?>"<?php echo esc_attr($cleverpushStoryId == $story->_id ? ' selected' : ''); ?>>
                                                  <?php echo esc_html($story->title); ?>
                                                </option>
                                                <?php
                                            }
                                            ?>
                                        </select>
                                    </td>
                                </tr>

                        <?php
                    } else {
                        ?>
                        <div class="error notice"><p>Es wurden keine CleverPush Stories gefunden.</p></div>
                        <?php
                    }
                } else if (!empty($response['response'])) {
                    ?>
                    <div class="error notice"><p>API Error: <?php echo esc_html($response['response']['message']); ?></p></div>
                    <?php
                }
            }

            ?>

                    <tr valign="top">
                        <th scope="row">Story Path</th>
                        <td>
                            <input type="text" name="post_name" value="<?php echo esc_attr($post->post_name); ?>" class="regular-text" />
                        </td>
                    </tr>

                    <tr valign="top">
                        <th scope="row">Zwischenspeicher</th>
                        <td>
                            <p class="text-muted">Die Inhalte deiner Stories werden alle 30 Minuten neu von den CleverPush Servern geladen. Hier kannst du den Zwischenspeicher dafür leeren:</p>

                            <br />
                            <p><?php submit_button('Zwischenspeicher leeren', 'primary', 'clear_cache', false); ?></p>
                        </td>
                    </tr>

                </table>
            </div>

            <?php
        }

        public function plugin_add_settings_link($links)
        {
            $settings_link = '<a href="options-general.php?page=cleverpush_options">' . __('Settings') . '</a>';
            array_unshift($links, $settings_link);
            return $links;
        }

        function ajax_load_options()
        {
            $selected_channel_id = get_option('cleverpush_channel_id');
            $api_key_private = get_option('cleverpush_apikey_private');
            $cleverpush_topics_required = false;
            $cleverpush_tags_required = false;
            $cleverpush_segments_required = false;
            $hidden_notification_settings = get_option('cleverpush_channel_hidden_notification_settings');

            if (!empty($api_key_private) && !empty($selected_channel_id)) {
                $cleverpush_segments = array();

                if (empty($hidden_notification_settings) || strpos($hidden_notification_settings, 'segments') === false) {
                    $response = wp_remote_get(
                        CLEVERPUSH_API_ENDPOINT . '/channel/' . $selected_channel_id . '/segments', array(
                         'timeout' => 10, // phpcs:ignore
                         'headers' => array(
                             'authorization' => $api_key_private
                         )
                        )
                    );

                    if (is_wp_error($response)) {
                        $segments_data = get_transient('cleverpush_segments_response');

                        if (empty($segments_data)) {
                            ?>
                            <div class="error notice">
                                <p><?php echo esc_html($response->get_error_message()); ?></p>
                            </div>
                               <?php
                        }
                    } else {
                        $body = wp_remote_retrieve_body($response);
                        $segments_data = json_decode($body);

                        set_transient('cleverpush_segments_response', $segments_data, 60 * 60 * 24 * 30);
                    }

                    if (isset($segments_data)) {
                        if (isset($segments_data->segments)) {
                            $cleverpush_segments = $segments_data->segments;
                        }
                        if (isset($segments_data->segmentsRequiredField) && $segments_data->segmentsRequiredField) {
                            $cleverpush_segments_required = true;
                        }
                    }
                }

                $cleverpush_topics = array();

                if (empty($hidden_notification_settings) || strpos($hidden_notification_settings, 'topics') === false) {
                    $response = wp_remote_get(
                        CLEVERPUSH_API_ENDPOINT . '/channel/' . $selected_channel_id . '/topics', array(
                        'timeout' => 10, // phpcs:ignore
                        'headers' => array(
                        'authorization' => $api_key_private
                          )
                        )
                    );

                    if (is_wp_error($response)) {
                        $topics_data = get_transient('cleverpush_topics_response');

                        if (empty($topics_data)) {
                            ?>
                <div class="error notice">
                    <p><?php echo esc_html($response->get_error_message()); ?></p>
                </div>
                               <?php
                        }
                    } else {
                        $body = wp_remote_retrieve_body($response);
                        $topics_data = json_decode($body);

                        set_transient('cleverpush_topics_response', $topics_data, 60 * 60 * 24 * 30);
                    }

                    if (isset($topics_data)) {
                        if (isset($topics_data->topics)) {
                            $cleverpush_topics = $topics_data->topics;
                        }
                        if (isset($topics_data->topicsRequiredField) && $topics_data->topicsRequiredField) {
                            $cleverpush_topics_required = true;
                        }
                    }
                }

                $cleverpush_tags = array();

                if (empty($hidden_notification_settings) || strpos($hidden_notification_settings, 'tags') === false) {
                    $response = wp_remote_get(
                        CLEVERPUSH_API_ENDPOINT . '/channel/' . $selected_channel_id . '/tags', array(
                        'timeout' => 10, // phpcs:ignore
                        'headers' => array(
                        'authorization' => $api_key_private
                          )
                        )
                    );

                    if (is_wp_error($response)) {
                        $tags_data = get_transient('cleverpush_tags_response');

                        if (empty($tags_data)) {
                            ?>
                <div class="error notice">
                    <p><?php echo esc_html($response->get_error_message()); ?></p>
                </div>
                               <?php
                        }
                    } else {
                        $body = wp_remote_retrieve_body($response);
                        $tags_data = json_decode($body);

                        set_transient('cleverpush_tags_response', $tags_data, 60 * 60 * 24 * 30);
                    }

                    if (isset($tags_data)) {
                        if (isset($tags_data->tags)) {
                            $cleverpush_tags = $tags_data->tags;
                        }
                        if (isset($tags_data->tagsRequiredField) && $tags_data->tagsRequiredField) {
                            $cleverpush_tags_required = true;
                        }
                    }
                }

                ?>

                <?php
                if (!empty($cleverpush_topics) && count($cleverpush_topics) > 0) {
                    ?>
                    <div class="components-base-control__field">
                        <label class="components-base-control__label"><?php _e('Topics', 'cleverpush'); ?>:</label>
                        <div>
                            <div>
                                <label><input name="cleverpush_use_topics" type="radio" value="0"
                                              checked> <?php _e('All subscriptions', 'cleverpush'); ?></label>
                            </div>
                            <div>
                                <label><input name="cleverpush_use_topics" type="radio"
                                              value="1"> <?php _e('Select topics', 'cleverpush'); ?></label>
                            </div>
                        </div>
                    </div>
                    <div class="components-base-control__field cleverpush-topics"
                         style="display: none; margin-left: 30px;" data-required="<?php echo esc_attr($cleverpush_topics_required ? 'true' : 'false'); ?>">
                    <?php
                    foreach ($cleverpush_topics as $topic) {
                        ?>
                            <div>
                                <label>
                                    <input type="checkbox" name="cleverpush_topics[]"
                                           value="<?php echo esc_attr($topic->_id); ?>"><?php echo esc_html($topic->name); ?></input>
                                </label>
                            </div>
                        <?php
                    }
                    ?>
                    </div>
                    <?php
                }
                ?>

                <?php
                if (!empty($cleverpush_tags) && count($cleverpush_tags) > 0) {
                    ?>
                    <div class="components-base-control__field">
                        <label class="components-base-control__label"><?php _e('Tags', 'cleverpush'); ?>:</label>
                        <div>
                            <div>
                                <label><input name="cleverpush_use_tags" type="radio" value="0"
                                              checked> <?php _e('All subscriptions', 'cleverpush'); ?></label>
                            </div>
                            <div>
                                <label><input name="cleverpush_use_tags" type="radio"
                                              value="1"> <?php _e('Select tags', 'cleverpush'); ?></label>
                            </div>
                        </div>
                    </div>
                    <div class="components-base-control__field cleverpush-tags"
                         style="display: none; margin-left: 30px;" data-required="<?php echo esc_attr($cleverpush_tags_required ? 'true' : 'false'); ?>">
                    <?php
                    foreach ($cleverpush_tags as $tag) {
                        ?>
                            <div>
                                <label>
                                    <input type="checkbox" name="cleverpush_tags[]"
                                           value="<?php echo esc_attr($tag->_id); ?>"><?php echo esc_html($tag->name); ?></input>
                                </label>
                            </div>
                        <?php
                    }
                    ?>
                    </div>
                    <?php
                }
                ?>

                <?php
                if (!empty($cleverpush_segments) && count($cleverpush_segments) > 0) {
                    ?>
                    <div class="components-base-control__field">
                        <label class="components-base-control__label"><?php _e('Segments', 'cleverpush'); ?>:</label>
                        <div>
                            <div>
                                <label><input name="cleverpush_use_segments" type="radio" value="0"
                                              checked> <?php _e('All subscriptions', 'cleverpush'); ?></label>
                            </div>
                            <div>
                                <label><input name="cleverpush_use_segments" type="radio"
                                              value="1"> <?php _e('Select segments', 'cleverpush'); ?></label>
                            </div>
                        </div>
                    </div>
                    <div class="components-base-control__field cleverpush-segments"
                         style="display: none; margin-left: 30px;" data-required="<?php echo esc_attr($cleverpush_segments_required ? 'true' : 'false'); ?>">
                    <?php
                    foreach ($cleverpush_segments as $segment) {
                        ?>
                            <div>
                                <label>
                                    <input type="checkbox" name="cleverpush_segments[]"
                                           value="<?php echo esc_attr($segment->_id); ?>"><?php echo esc_html($segment->name); ?></input>
                                </label>
                            </div>
                        <?php
                    }
                    ?>
                    </div>
                    <?php
                }
                ?>

                <?php

            } else {

                ?>

                <div><?php _e('Please enter your API keys first', 'cleverpush'); ?></div>

                <?php

            }

            wp_die();
        }


        //------------------------------------------------------------------------//
        //---Metabox--------------------------------------------------------------//
        //------------------------------------------------------------------------//
        public function create_metabox()
        {
            if (!current_user_can('cleverpush_send')) {
                return;
            }

            add_meta_box('cleverpush-metabox', 'CleverPush', array($this, 'metabox'), 'post', 'side', 'high');

            $post_types = get_option('cleverpush_post_types');
            if (!empty($post_types)) {
                foreach ($post_types as $post_type) {
                    add_meta_box('cleverpush-metabox', 'CleverPush', array($this, 'metabox'), $post_type, 'side', 'high');
                }
            }

            add_meta_box('cleverpush_story_id_meta', 'CleverPush Story', array(&$this, 'cleverpush_story_id_meta'), 'cleverpush_story', 'normal', 'default');
        }

        public function metabox($post)
        {
            $notification_sent = get_post_meta($post->ID, 'cleverpush_notification_sent', true);
            $notification_already_sent = ! empty($notification_sent);

            $selected_channel_id = get_option('cleverpush_channel_id');
            $api_key_private = get_option('cleverpush_apikey_private');

            if (!empty($api_key_private) && !empty($selected_channel_id)) {

                ?>
                <?php if ($notification_already_sent) : ?>
                <p class="cleverpush-notification-sent-message">✅ <?php esc_html_e('A notification has been sent for this post.', 'cleverpush'); ?></p>
                <?php endif; ?>

                <input type="hidden" name="cleverpush_metabox_form_data_available" value="1">
                
        <div>
          <label><input name="cleverpush_send_notification" type="checkbox"
                  value="1" <?php
                            if (!$notification_already_sent && get_post_meta($post->ID, 'cleverpush_send_notification', true)) {
                                echo ' checked';
                            }
                            ?>> <?php echo $notification_already_sent ? esc_html__('Send again', 'cleverpush') : esc_html__('Send push notification', 'cleverpush'); ?>
          </label>
        </div>

                <div class="cleverpush-content components-base-control" style="display: none; margin-top: 15px;">
                    <div class="components-base-control__field">
                        <label class="components-base-control__label"
                               for="cleverpush_title"><?php _e('Custom headline', 'cleverpush'); ?><?php echo esc_html(get_option('cleverpush_notification_title_required') == 'on' ? (' (' . __('required', 'cleverpush') . ')') : '') ?>:</label>
                        <div><input type="text" name="cleverpush_title" id="cleverpush_title"
                                    value="<?php echo esc_attr(!empty(get_post_meta($post->ID, 'cleverpush_title', true)) ? get_post_meta($post->ID, 'cleverpush_title', true) : ''); ?>"
                                    style="width: 100%"
                                    ></div>
                    </div>

                    <div class="components-base-control__field">
                        <label class="components-base-control__label"
                               for="cleverpush_text"><?php _e('Custom text', 'cleverpush'); ?>:</label>
                        <div><input type="text" name="cleverpush_text" id="cleverpush_text"
                                    value="<?php echo esc_attr(!empty(get_post_meta($post->ID, 'cleverpush_text', true)) ? get_post_meta($post->ID, 'cleverpush_text', true) : ''); ?>"
                                    style="width: 100%"></div>
                    </div>

                    <div class="components-base-control__field">
                        <label class="components-base-control__label"
                               for="cleverpush_notification_delay"><?php _e('Notification delay (optional)', 'cleverpush'); ?>:</label>
                        <div>
                            <select name="cleverpush_notification_delay" id="cleverpush_notification_delay" style="width: 100%">
                                <option value="" <?php selected(get_post_meta($post->ID, 'cleverpush_notification_delay', true), ''); ?>><?php _e('Send immediately (no delay)', 'cleverpush'); ?></option>
                                <option value="15" <?php selected(get_post_meta($post->ID, 'cleverpush_notification_delay', true), '15'); ?>><?php _e('15 minutes after publication', 'cleverpush'); ?></option>
                                <option value="30" <?php selected(get_post_meta($post->ID, 'cleverpush_notification_delay', true), '30'); ?>><?php _e('30 minutes after publication', 'cleverpush'); ?></option>
                                <option value="60" <?php selected(get_post_meta($post->ID, 'cleverpush_notification_delay', true), '60'); ?>><?php _e('1 hour after publication', 'cleverpush'); ?></option>
                                <option value="120" <?php selected(get_post_meta($post->ID, 'cleverpush_notification_delay', true), '120'); ?>><?php _e('2 hours after publication', 'cleverpush'); ?></option>
                                <option value="240" <?php selected(get_post_meta($post->ID, 'cleverpush_notification_delay', true), '240'); ?>><?php _e('4 hours after publication', 'cleverpush'); ?></option>
                                <option value="custom" <?php selected(get_post_meta($post->ID, 'cleverpush_notification_delay', true), 'custom'); ?>><?php _e('Custom scheduled date & time', 'cleverpush'); ?></option>
                            </select>
                        </div>
                    </div>

                    <div class="components-base-control__field cleverpush-scheduled-date-row" style="display: none;">
                        <label class="components-base-control__label"
                               for="cleverpush_scheduled_at_picker"><?php _e('Select date & time', 'cleverpush'); ?>:</label>
                        <div><input type="datetime-local" name="cleverpush_scheduled_at_picker" id="cleverpush_scheduled_at_picker"
                                    style="width: 100%"></div>
                        <input type="hidden" name="cleverpush_scheduled_at" id="cleverpush_scheduled_at"
                                    value="<?php echo esc_attr(!empty(get_post_meta($post->ID, 'cleverpush_scheduled_at', true)) ? get_post_meta($post->ID, 'cleverpush_scheduled_at', true) : ''); ?>"
                                    style="width: 100%">
                    </div>

                    <div class="cleverpush-loading-container">
                        <div class="cleverpush-loading"></div>
                    </div>

                    <div style="margin-top: 15px; display:none; justify-content: center;" id="cleverpush_ai_generation">
                        <button id="cleverpush_ai_generation_button" class="button" disabled>
                            Generate Content with AI
                        </button>
                    </div>
                </div>

                <div style="margin-top: 15px;">
          <label><input name="cleverpush_disable_feed" type="checkbox"
                  value="1" <?php if (get_post_meta($post->ID, 'cleverpush_disable_feed', true)) { echo esc_html('checked');
                            } ?>> <?php _e('Do not push via feed', 'cleverpush'); ?>
          </label>
        </div>

                <script>
                    try {
                        var cpCheckbox = document.querySelector('input[name="cleverpush_send_notification"]');
                        var cpContent = document.querySelector('.cleverpush-content');
                        var cpLoading = document.querySelector('.cleverpush-loading-container');
                        var cpScheduledAtInput = document.querySelector('input[name="cleverpush_scheduled_at"]');
                        var cpScheduledAtPicker = document.querySelector('input[name="cleverpush_scheduled_at_picker"]');
                        if (cpCheckbox && cpContent) {
                            cpContent.style.display = cpCheckbox.checked ? 'block' : 'none';
                            cpCheckbox.addEventListener('change', function (e) {
                                cpContent.style.display = e.target.checked ? 'block' : 'none';

                                if (!e.target.checked && cpScheduledAtPicker) {
                                  cpScheduledAtPicker.value = '';
                                }
                            });
                            var cpDelaySelect = document.querySelector('select[name="cleverpush_notification_delay"]');
                            var cpScheduledDateRow = document.querySelector('.cleverpush-scheduled-date-row');
                            function updateScheduledDateRowVisibility() {
                                if (cpScheduledDateRow && cpDelaySelect) {
                                    cpScheduledDateRow.style.display = cpDelaySelect.value === 'custom' ? 'block' : 'none';
                                    if (cpDelaySelect.value !== 'custom' && cpScheduledAtPicker) {
                                        cpScheduledAtPicker.value = '';
                                        if (cpScheduledAtInput) cpScheduledAtInput.value = '';
                                    }
                                }
                            }
                            if (cpDelaySelect) {
                                cpDelaySelect.addEventListener('change', updateScheduledDateRowVisibility);
                                updateScheduledDateRowVisibility();
                            }


                            var initCleverPush = function () {
                                if (typeof wp !== 'undefined' && wp.data && wp.data.subscribe && wp.data.select) {
                                    var hasNotice = false;

                                    var coreEditor = wp.data.select('core/editor');

                                    if (coreEditor) {
                                        var wasSavingPost = coreEditor.isSavingPost();
                                        var wasAutosavingPost = coreEditor.isAutosavingPost();
                                        var wasPreviewingPost = coreEditor.isPreviewingPost();
                                        // determine whether to show notice
                                        wp.data.subscribe(function () {
                                            if (typeof wp !== 'undefined' && wp.data && wp.data.subscribe && wp.data.select) {
                                                if (!coreEditor) {
                                                    coreEditor = wp.data.select('core/editor');
                                                }
                                                if (coreEditor) {
                                                    var isSavingPost = coreEditor.isSavingPost();
                                                    var isAutosavingPost = coreEditor.isAutosavingPost();
                                                    var isPreviewingPost = coreEditor.isPreviewingPost();
                                                    var postStatus = coreEditor.getEditedPostAttribute('status');

                                                    // Save metaboxes on save completion, except for autosaves that are not a post preview.
                                                    var shouldTriggerTemplateNotice = (
                                                        (wasSavingPost && !isSavingPost && !wasAutosavingPost) ||
                                                        (wasAutosavingPost && wasPreviewingPost && !isPreviewingPost)
                                                    );

                                                    // Save current state for next inspection.
                                                    wasSavingPost = isSavingPost;
                                                    wasAutosavingPost = isAutosavingPost;
                                                    wasPreviewingPost = isPreviewingPost;

                                                    if (shouldTriggerTemplateNotice && postStatus === 'publish') {
                                                        if (cpCheckbox && cpCheckbox.checked) {
                                                            setTimeout(function () {
                                                                cpCheckbox.checked = false;
                                                            }, 30 * 1000);

                                                            hasNotice = true;

                                                            wp.data.dispatch('core/notices').createNotice(
                                                                'info', // Can be one of: success, info, warning, error.
                                                                '<?php echo esc_html(__('The push notification for this post has been successfully sent.', 'cleverpush')); ?>', // Text string to display.
                                                                {
                                                                    id: 'cleverpush-notification-status', //assigning an ID prevents the notice from being added repeatedly
                                                                    isDismissible: true, // Whether the user can dismiss the notice.
                                                                    // Any actions the user can perform.
                                                                    actions: []
                                                                }
                                                            );
                                                        } else if (hasNotice) {
                                                            var coreNotices = wp.data.dispatch('core/notices');
                                                            if (coreNotices) {
                                                                coreNotices.removeNotice('cleverpush-notification-status');
                                                            }
                                                        }
                                                    }
                                                }
                                            }
                                        });
                                    }
                                }

                                var request = new XMLHttpRequest();
                                request.onreadystatechange = function() {
                                    if (request.readyState === XMLHttpRequest.DONE) {
                                        if (cpContent) {
                                            var ajaxContent = document.createElement('div');
                                            ajaxContent.innerHTML = request.responseText;
                                            cpContent.appendChild(ajaxContent);

                                            if (cpLoading) {
                                                cpLoading.style.display = 'none';
                                            }

                                            var cpTopicsRadios = document.querySelectorAll('input[name="cleverpush_use_topics"]');
                                            var cpTopics = document.querySelector('.cleverpush-topics');
                                            var topicsRequired = false;
                                            if (cpTopicsRadios && cpTopics) {
                                                topicsRequired = cpTopics.dataset.required === 'true';
                                                for (var cpTopicsRadioIndex = 0; cpTopicsRadioIndex < cpTopicsRadios.length; cpTopicsRadioIndex++) {
                                                    cpTopicsRadios[cpTopicsRadioIndex].addEventListener('change', function (e) {
                                                        cpTopics.style.display = e.currentTarget.value === '1' ? 'block' : 'none';
                                                    });
                                                }
                                            }

                                            var cpTagsRadios = document.querySelectorAll('input[name="cleverpush_use_tags"]');
                                            var cpTags = document.querySelector('.cleverpush-tags');
                                            var tagsRequired = false;
                                            if (cpTagsRadios && cpTags) {
                                                tagsRequired = cpTags.dataset.required === 'true';
                                                for (var cpTagsRadioIndex = 0; cpTagsRadioIndex < cpTagsRadios.length; cpTagsRadioIndex++) {
                                                  cpTagsRadios[cpTagsRadioIndex].addEventListener('change', function (e) {
                                                        cpTags.style.display = e.currentTarget.value === '1' ? 'block' : 'none';
                                                    });
                                                }
                                            }

                                            var cpSegmentsRadios = document.querySelectorAll('input[name="cleverpush_use_segments"]');
                                            var cpSegments = document.querySelector('.cleverpush-segments');
                                            var segmentsRequired = false;
                                            if (cpSegmentsRadios && cpSegments) {
                                                segmentsRequired = cpSegments.dataset.required === 'true';
                                                for (var cpSegmentRadioIndex = 0; cpSegmentRadioIndex < cpSegmentsRadios.length; cpSegmentRadioIndex++) {
                                                    cpSegmentsRadios[cpSegmentRadioIndex].addEventListener('change', function (e) {
                                                        cpSegments.style.display = e.currentTarget.value === '1' ? 'block' : 'none';
                                                    });
                                                }
                                            }

                                            if (topicsRequired || segmentsRequired) {
                                                if (typeof wp !== 'undefined' && wp.plugins && wp.plugins.registerPlugin && wp.editPost && wp.editPost.PluginPrePublishPanel) {
                                                    var topicsLocked = false;
                                                    var segmentsLocked = false;

                                                    var registerPlugin = wp.plugins.registerPlugin;
                                                    var PluginPrePublishPanel = wp.editPost.PluginPrePublishPanel;

                                                    var PrePublishCleverPush = function() {
                                                        if ( cpCheckbox && cpCheckbox.checked ) {
                                                            var topicsChecked = false;
                                                            if (topicsRequired) {
                                                                var topics = cpTopics.querySelectorAll('input[type="checkbox"]');
                                                                for (var i = 0; i < topics.length; i++) {
                                                                    if (topics[i].checked) {
                                                                        topicsChecked = true;
                                                                    }
                                                                }
                                                                if (!topicsChecked && !topicsLocked) {
                                                                    topicsLocked = true;
                                                                    wp.data.dispatch( 'core/editor' ).lockPostSaving( 'cleverpushTopics' );
                                                                } else if (topicsChecked && topicsLocked) {
                                                                    topicsLocked = false;
                                                                    wp.data.dispatch( 'core/editor' ).unlockPostSaving( 'cleverpushTopics' );
                                                                }
                                                            }

                                                            var segmentsChecked = false;
                                                            if (segmentsRequired) {
                                                                var segments = cpSegments.querySelectorAll('input[type="checkbox"]');
                                                                for (var i = 0; i < segments.length; i++) {
                                                                    if (segments[i].checked) {
                                                                        segmentsChecked = true;
                                                                    }
                                                                }
                                                                if (!segmentsChecked && !segmentsLocked) {
                                                                    segmentsLocked = true;
                                                                    wp.data.dispatch( 'core/editor' ).lockPostSaving( 'cleverpushSegments' );
                                                                } else if (segmentsChecked && segmentsLocked) {
                                                                    segmentsLocked = false;
                                                                    wp.data.dispatch( 'core/editor' ).unlockPostSaving( 'cleverpushSegments' );
                                                                }
                                                            }
                                                        }

                                                        return React.createElement(PluginPrePublishPanel, {
                                                            title: 'CleverPush'
                                                        }, topicsRequired && !topicsChecked ? React.createElement("p", null, "Bitte Themenbereiche ausw\xE4hlen") : null, segmentsRequired && !segmentsChecked ? React.createElement("p", null, "Bitte Segmente ausw\xE4hlen") : null);
                                                    };

                                                    registerPlugin( 'pre-publish-checklist', { render: PrePublishCleverPush } );
                                                } else {
                                                    var publish = document.getElementById('publish');
                                                    if (publish) {
                                                        publish.addEventListener('click', function(e) {
                                                            if ( cpCheckbox && cpCheckbox.checked ) {
                                                                var topicsChecked = false;
                                                                if (topicsRequired) {
                                                                    var topics = cpTopics.querySelectorAll('input[type="checkbox"]');
                                                                    for (var i = 0; i < topics.length; i++) {
                                                                        if (topics[i].checked) {
                                                                            topicsChecked = true;
                                                                        }
                                                                    }
                                                                    if (!topicsChecked) {
                                                                        e.preventDefault();
                                                                        alert('CleverPush: Bitte Themenbereiche auswählen');
                                                                        return;
                                                                    }
                                                                }

                                                                var segmentsChecked = false;
                                                                if (segmentsRequired) {
                                                                    var segments = cpSegments.querySelectorAll('input[type="checkbox"]');
                                                                    for (var i = 0; i < segments.length; i++) {
                                                                        if (segments[i].checked) {
                                                                            segmentsChecked = true;
                                                                        }
                                                                    }
                                                                    if (!segmentsChecked) {
                                                                        e.preventDefault();
                                                                        alert('CleverPush: Bitte Segmente auswählen');
                                                                        return;
                                                                    }
                                                                }
                                                            }
                                                        });
                                                    }
                                                }
                                            }

                                            if (cpScheduledAtInput && cpScheduledAtPicker) {
                                                var getLocalDateString = function(date) {
                                                    return date.getFullYear() + '-' + ((date.getMonth() + 1) + '').padStart(2, '0') + '-' + (date.getDate() + '') + "T" + (date.getHours() + '').padStart(2, '0') + ":" + (date.getMinutes() + '').padStart(2, '0')
                                                };
                                                var date = new Date();
                                                cpScheduledAtPicker.min = getLocalDateString(date);
                                                if (cpScheduledAtInput.value && new Date(cpScheduledAtInput.value) > new Date()) {
                                                    cpScheduledAtPicker.value = getLocalDateString(new Date(cpScheduledAtInput.value));
                                                }
                                                cpScheduledAtPicker.addEventListener('change', function() {
                                                    if (!cpScheduledAtPicker.value) {
                                                        cpScheduledAtInput.value = '';
                                                        return;
                                                    }
                                                    cpScheduledAtInput.value = new Date(cpScheduledAtPicker.value).toISOString();
                                                });
                                            }
                                        }
                                    }
                                };
                                request.open('POST', ajaxurl, true);
                                request.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8');
                                request.send('action=cleverpush_send_options');
                            };

                            if (document.readyState === 'complete') {
                                initCleverPush();
                            } else {
                                window.addEventListener('load', initCleverPush);
                            }
                        }
                    } catch (err) {
                        console.error(err);
                    }
                </script>

                <script>
                    const getUserPlan = async () => {
                        const response = await fetch(ajaxurl, {
                            method: 'POST',
                            headers: {
                                'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
                            },
                            body: 'action=cleverpush_users_plan'
                        });
                        return await response.json();
                    };

                    const getAiGeneration = async ({postId, title, text}) => {
                        const response = await fetch(ajaxurl, {
                            method: 'POST',
                            headers: {
                                'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'
                            },
                            body: `action=cleverpush_ai_generation&post_id=${postId}&title=${title}&text=${text}`
                        });
                        return await response.json();
                    };

                    const initAIGeneration = async () => {
                        const plan = await getUserPlan();

                        const debounce = (callback, wait) => {
                            let timeoutId = null;
                            return (...args) => {
                                window.clearTimeout(timeoutId);
                                timeoutId = window.setTimeout(() => {
                                    callback.apply(null, args);
                                }, wait);
                            };
                        }

                        if (plan.aiGeneration) {
                            const aiGenerationButton = document.querySelector('#cleverpush_ai_generation_button');
                            const aiGenerationDiv = document.querySelector('#cleverpush_ai_generation');
                            aiGenerationDiv.style.display = 'flex';

                            var editingPostData = {
                                title: undefined,
                                text: undefined,
                            };
                            wp.data.subscribe(debounce(() => {
                                const coreEditor = wp.data.select('core/editor');

                                if (coreEditor) {
                                    editingPostData.title = coreEditor.getEditedPostAttribute('title');
                                    editingPostData.text = coreEditor.getEditedPostAttribute('content');
                                } else {
                                    // In case the editor is not available, we can still try to get the data from the DOM
                                    const titleField = document.querySelector('#title');
                                    const contentField = document.querySelector('#content');
                                    if (tinymce) {
                                        editingPostData.title = titleField.value;
                                        editingPostData.text = tinymce.activeEditor.getContent() || contentField.value;
                                    }
                                }

                                if (aiGenerationDiv.style.display !== 'none') {
                                    if (Object.values(editingPostData).some(value => value === undefined || value.length === 0)) {
                                        aiGenerationButton.setAttribute('disabled', 'disabled');
                                    } else {
                                        aiGenerationButton.removeAttribute('disabled');
                                    }
                                }
                            }, 1000));


                            aiGenerationButton.addEventListener('click', async (e) => {
                                e.preventDefault();
                                const postIdField = document.querySelector('#post_ID');
                                const postId = postIdField.value;

                                aiGenerationButton.setAttribute('disabled', 'disabled');
                                aiGenerationButton.innerHTML = 'Generating...';

                                const response = await getAiGeneration({postId, ...editingPostData});

                                const cpTitleField = document.querySelector('#cleverpush_title');
                                const cpTextField = document.querySelector('#cleverpush_text');

                                cpTitleField.value = response.title;
                                cpTextField.value = response.text;

                                aiGenerationButton.removeAttribute('disabled');
                                aiGenerationButton.innerHTML = 'Generate Content with AI';
                            });
                        }
                    };

                    try {
                        initAIGeneration();
                    } catch (err) {
                        console.error(err);
                    }
                </script>

                <?php

            } else {

                ?>

                <div><?php _e('Please enter your API keys first', 'cleverpush'); ?></div>

                <?php

            }
        }

        /**
         * Sends push notification for a post. Used on first publish and on "Send again".
         *
         * @param int $post_id Post ID.
         */
        private function do_send_push_for_post($post_id)
        {
            $title = html_entity_decode(get_the_title($post_id));
            if (get_option('cleverpush_notification_title_required') == 'on') {
                $title = null;
            }
            $post_obj = get_post($post_id);
            $text = !empty($post_obj->post_excerpt) ? html_entity_decode($post_obj->post_excerpt) : '';
            $url = get_permalink($post_id);

            if (!empty($_POST['cleverpush_title'])) {
                $title = sanitize_text_field(wp_unslash($_POST['cleverpush_title']));
                $text = '';
            }
            if (!empty($_POST['cleverpush_text'])) {
                $text = sanitize_text_field(wp_unslash($_POST['cleverpush_text']));
            }

            if (empty($title)) {
                return;
            }

            $options = array();
            if (isset($_POST['cleverpush_use_segments']) && $_POST['cleverpush_use_segments'] == '1' && !empty($_POST['cleverpush_segments'])) {
                $options['segments'] = array_map('sanitize_text_field', wp_unslash($_POST['cleverpush_segments']));
            }
            if (isset($_POST['cleverpush_use_topics']) && $_POST['cleverpush_use_topics'] == '1' && !empty($_POST['cleverpush_topics'])) {
                $options['topics'] = array_map('sanitize_text_field', wp_unslash($_POST['cleverpush_topics']));
            }
            if (isset($_POST['cleverpush_use_tags']) && $_POST['cleverpush_use_tags'] == '1' && !empty($_POST['cleverpush_tags'])) {
                $options['tags'] = array_map('sanitize_text_field', wp_unslash($_POST['cleverpush_tags']));
            }
            $thumbnail_url = get_the_post_thumbnail_url($post_id);
            if (!empty($thumbnail_url)) {
                $options['mediaUrl'] = $thumbnail_url;
            }

            $notification_delay = isset($_POST['cleverpush_notification_delay']) ? sanitize_text_field(wp_unslash($_POST['cleverpush_notification_delay'])) : get_post_meta($post_id, 'cleverpush_notification_delay', true);
            $delay_minutes = array('15' => 15, '30' => 30, '60' => 60, '120' => 120, '240' => 240);
            if (!empty($notification_delay) && isset($delay_minutes[ $notification_delay ])) {
                $options['scheduledAt'] = time() + ( $delay_minutes[ $notification_delay ] * 60 );
            } elseif ($notification_delay === 'custom') {
                $scheduled_at = isset($_POST['cleverpush_scheduled_at']) ? sanitize_text_field(wp_unslash($_POST['cleverpush_scheduled_at'])) : get_post_meta($post_id, 'cleverpush_scheduled_at', true);
                if (!empty($scheduled_at)) {
                    $options['scheduledAt'] = is_numeric($scheduled_at) ? (int) $scheduled_at : strtotime($scheduled_at);
                }
            } elseif (!isset($_POST['cleverpush_notification_delay']) && !empty($_POST['cleverpush_scheduled_at'])) {
                $scheduled_at = sanitize_text_field(wp_unslash($_POST['cleverpush_scheduled_at']));
                if (!empty($scheduled_at)) {
                    $options['scheduledAt'] = is_numeric($scheduled_at) ? (int) $scheduled_at : strtotime($scheduled_at);
                }
            }

            delete_post_meta($post_id, 'cleverpush_send_notification');

            try {
                CleverPush_Api::send_notification($title, $text, $url, $options);
                update_option('cleverpush_notification_result', array('status' => 'success'));
                update_option('cleverpush_notification_error', null);
                update_post_meta($post_id, 'cleverpush_notification_sent', true);
                update_post_meta($post_id, 'cleverpush_notification_sent_at', time());
            } catch (Exception $ex) {
                update_option('cleverpush_notification_result', array('status' => 'error', 'message' => $ex->getMessage()));
                update_option('cleverpush_notification_error', $ex->getMessage());
            }
        }

        public function publish_post($post_id)
        {
            if (isset($_POST['action']) && 'inline-save' == $_POST['action']) {
                return;
            }

            if (!current_user_can('cleverpush_send')) {
                return;
            }

            if (isset($_POST['cleverpush_metabox_form_data_available']) ? !isset($_POST['cleverpush_send_notification']) : !get_post_meta($post_id, 'cleverpush_send_notification', true)) {
                return;
            }

            $this->do_send_push_for_post($post_id);
        }

        public function save_post($post_id, $post)
        {
            if (!current_user_can('cleverpush_send')) {
                return;
            }

            if (!current_user_can('edit_post', $post_id)) {
                return;
            }

            if (isset($_POST['action']) && 'inline-save' == $_POST['action']) {
                return;
            }

            $should_send = get_post_status($post_id) != 'publish' ? isset($_POST['cleverpush_send_notification']) : false;
            update_post_meta($post_id, 'cleverpush_send_notification', $should_send);

            // "Send again": post is already published, notification was sent before, user checked the box.
            if (get_post_status($post_id) === 'publish'
                && get_post_meta($post_id, 'cleverpush_notification_sent', true)
                && isset($_POST['cleverpush_metabox_form_data_available'])
                && isset($_POST['cleverpush_send_notification'])
            ) {
                $this->do_send_push_for_post($post_id);
            }

            update_post_meta($post_id, 'cleverpush_disable_feed', isset($_POST['cleverpush_disable_feed']));

            if (isset($_POST['cleverpush_title'])) {
                update_post_meta($post_id, 'cleverpush_title', sanitize_text_field($_POST['cleverpush_title']));
            }
            if (isset($_POST['cleverpush_text'])) {
                update_post_meta($post_id, 'cleverpush_text', sanitize_text_field($_POST['cleverpush_text']));
            }
            if (isset($_POST['cleverpush_scheduled_at'])) {
                update_post_meta($post_id, 'cleverpush_scheduled_at', sanitize_text_field($_POST['cleverpush_scheduled_at']));
            }
            if (isset($_POST['cleverpush_notification_delay'])) {
                $delay = sanitize_text_field($_POST['cleverpush_notification_delay']);
                update_post_meta($post_id, 'cleverpush_notification_delay', in_array($delay, array('', '15', '30', '60', '120', '240', 'custom'), true) ? $delay : '');
            }

            if (!empty($_POST['cleverpush_story_id'])) {
                if (isset($_POST['clear_cache']) && !empty($_POST['cleverpush_story_id'])) {
                    delete_transient('cleverpush_story_' . sanitize_text_field($_POST['cleverpush_story_id']) . '_content');
                    delete_transient('cleverpush_story_' . sanitize_text_field($_POST['cleverpush_story_id']) . '_time');
                }

                $meta = array(
                'cleverpush_story_id' => sanitize_text_field($_POST['cleverpush_story_id']),
                );

                foreach ($meta as $key => $value) { // Cycle through the $events_meta array!
                    if ($post->post_type == 'revision' ) { return; // Don't store custom data twice
                    }
                    $value = implode(',', (array)$value); // If $value is an array, make it a CSV (unlikely)
                    if (get_post_meta($post->ID, $key, false)) { // If the custom field already has a value
                        update_post_meta($post->ID, $key, $value);
                    } else { // If the custom field doesn't have a value
                        add_post_meta($post->ID, $key, $value);
                    }
                    if (!$value) { delete_post_meta($post->ID, $key); // Delete if blank
                    }
                }
                remove_action('save_post', array( $this, 'save_post' ), 1);
            }
        }

        public function show_public_preview( $query )
        {
            if ($query->is_main_query() 
                && $query->is_preview() 
                && $query->is_singular() 
                && $query->get('_cp_token')
            ) {
                if (! headers_sent() ) {
                    nocache_headers();
                    header('X-Robots-Tag: noindex');
                }
                add_action('wp_head', 'wp_no_robots');

                add_filter('posts_results', array($this, 'set_post_to_publish'), 10, 2);
            }

            return $query;
        }

        public function set_post_to_publish( $posts )
        {
            remove_filter('posts_results', array( $this, 'set_post_to_publish' ), 10);

            if (empty($posts) ) {
                return $posts;
            }

            $post_id = (int) $posts[0]->ID;

            if (get_query_var('_cp_token') != hash('sha256', get_option('cleverpush_apikey_private')) ) {
                wp_die(esc_attr(__('This link is not valid!', 'cleverpush')), 403);
            }

            $posts[0]->post_status = 'publish';

            return $posts;
        }

        public function add_query_var( $qv )
        {
            $qv[] = '_cp_token';
            return $qv;
        }

        public function notices()
        {
            $result = get_option('cleverpush_notification_result', null);
            if ($result) {
                if ($result['status'] === 'success') {
                    ?>
                    <div class="notice notice-success is-dismissible"><p><?php echo esc_html(__('The push notification for this post has been successfully sent.', 'cleverpush')); ?></p></div>
                    <?php
                }
                else if ($result['status'] === 'error') {
                    ?>
                    <div class="error is-dismissible"><p>CleverPush API Error:<br>' . <?php echo esc_html($result['message']); ?></p></div>
                    <?php
                }
            }
            update_option('cleverpush_notification_result', null);
        }

        public function plugin_menu()
        {
            add_options_page('CleverPush', 'CleverPush', 'cleverpush_settings', 'cleverpush_options', array($this, 'plugin_options'));
        }

        public function register_settings()
        {
            register_setting('cleverpush_options', 'cleverpush_channel_config');
            register_setting('cleverpush_options', 'cleverpush_channel_id');
            register_setting('cleverpush_options', 'cleverpush_channel_subdomain');
            register_setting('cleverpush_options', 'cleverpush_channel_hidden_notification_settings');
            register_setting('cleverpush_options', 'cleverpush_channel_worker_file');
            register_setting('cleverpush_options', 'cleverpush_apikey_private');
            register_setting('cleverpush_options', 'cleverpush_apikey_public');
            register_setting('cleverpush_options', 'cleverpush_notification_title_required');
            register_setting('cleverpush_options', 'cleverpush_stories_enabled');
            register_setting('cleverpush_options', 'cleverpush_feed_enabled');
            register_setting('cleverpush_options', 'cleverpush_feed_maximum_days');
            register_setting('cleverpush_options', 'cleverpush_feed_maximum_articles');
            register_setting('cleverpush_options', 'cleverpush_post_types');
            register_setting('cleverpush_options', 'cleverpush_preview_access_enabled');
            register_setting('cleverpush_options', 'cleverpush_enable_domain_replacement');
            register_setting('cleverpush_options', 'cleverpush_replacement_domain');
            register_setting('cleverpush_options', 'cleverpush_script_disabled');
            register_setting('cleverpush_options', 'cleverpush_script_blocked_consentmanager_enabled');
            register_setting('cleverpush_options', 'cleverpush_amp_enabled');
            register_setting('cleverpush_options', 'cleverpush_amp_widget_position');
        }

        public function get_static_endpoint()
        {
            $channel = get_option('cleverpush_channel_config');
            $static_subdomain_suffix = '';
            if (!empty($channel) && !empty($channel->hostingLocation)) {
                $static_subdomain_suffix = '-' . $channel->hostingLocation;
            }
            return "https://static" . $static_subdomain_suffix . ".cleverpush.com";
        }

        public function javascript()
        {
            $cleverpush_id = get_option('cleverpush_channel_id');
            $wp_worker_file = get_option('cleverpush_channel_worker_file') == true;
            if (!$this->is_amp_request()
                && !empty($cleverpush_id)
                && get_option('cleverpush_script_disabled') != 'on'
            ) {
                 $plugin_data = get_file_data(__FILE__, array('Version' => 'Version'), false);
                 $plugin_version = $plugin_data['Version'];

                if ($wp_worker_file) {
                    ?>
                    <script>window.cleverPushConfig = { serviceWorkerFile: '<?php echo esc_url_raw($this->get_worker_url()); ?>' };</script>
                    <?php
                }

                $scriptSrc = $this->get_static_endpoint(). "/channel/loader/" . $cleverpush_id . ".js?ver=" . $plugin_version;
                $iabVendorId = 1139;

                if (get_option('cleverpush_script_blocked_consentmanager_enabled') == 'on') {
                    ?>
                    <script
                      type="text/plain"
                      data-cmp-src="<?php echo esc_url_raw($scriptSrc); ?>"
                      class="cmplazyload"
                      data-cmp-vendor="<?php echo esc_attr($iabVendorId); ?>"
                      async
                    ></script>
                    <?php
                } else {
                    ?>
                    <script src="<?php echo esc_url_raw($scriptSrc); ?>" async></script>
                    <?php
                }
            }
        }

        public function get_plugin_path()
        {
            return rtrim(parse_url(plugin_dir_url(__FILE__), PHP_URL_PATH), '/');
        }

        public function get_worker_url()
        {
            $cleverpush_id = get_option('cleverpush_channel_id');
            return $this->get_plugin_path() . '/cleverpush-worker.js.php?channel=' . $cleverpush_id;
        }

        public function plugin_options()
        {
            if (!current_user_can('cleverpush_settings')) {
                return;
            }

            $channels = array();
            $selected_channel = null;
            $selected_channel_id = get_option('cleverpush_channel_id');
            $api_key_private = get_option('cleverpush_apikey_private');

            if (!empty($api_key_private)) {
                $response = wp_remote_get(
                    CLEVERPUSH_API_ENDPOINT . '/channels', array(
                    'timeout' => 10,
                    'headers' => array(
                    'authorization' => $api_key_private
                    )
                    )
                );

                if (is_wp_error($response) ) {
                    ?>
            <div class="error notice">
              <p><?php echo esc_html($response->get_error_message()); ?></p>
            </div>
                    <?php

                } else {
                    $body = wp_remote_retrieve_body($response);
                    $data = json_decode($body);
                    if (isset($data->channels)) {
                        foreach ($data->channels as $channel) {
                            if (empty($channel->type) || $channel->type !== 'web') {
                                continue;
                            }

                            $channels[] = $channel;

                            if (!empty($channel) && $channel->_id == $selected_channel_id) {
                                $selected_channel = $channel;

                                update_option('cleverpush_channel_config', $channel);
                                update_option('cleverpush_channel_subdomain', $channel->identifier);
                                update_option('cleverpush_channel_hidden_notification_settings', isset($channel->hiddenNotificationSettings) && is_array($channel->hiddenNotificationSettings) ? implode($channel->hiddenNotificationSettings) : '');

                                if (!empty($channel->serviceWorkerPath)) {
                                    update_option('cleverpush_channel_worker_file', false);
                                } else {
                                    $worker_file = !empty($channel->serviceWorkerPath) ? $channel->serviceWorkerPath : '/cleverpush-worker.js';
                                    $response = wp_remote_get(
                                        get_home_url() . $worker_file, [
                                        'timeout' => 3,
                                        ]
                                    );
                                    $response_code = wp_remote_retrieve_response_code($response);
                                    $response_successful = !empty($response_code) && $response_code == 200;
    
                                    update_option('cleverpush_channel_worker_file', !$response_successful);
                                }
                            }
                        }
                    }

                    usort(
                        $channels, function ($a, $b) {
                            return strcmp($a->name, $b->name);
                        }
                    );
                }

                if ($_SERVER['REQUEST_METHOD'] === 'POST' && $_POST['cleverpush_action'] == 'synchronize_stories') {
                    $response = wp_remote_get('https://api.cleverpush.com/channel/' . $selected_channel_id . '/stories', array('headers' => array('Authorization' => $api_key_private)));
                    if (is_wp_error($response) ) {
                        ?>
                        <div class="error notice">
                            <p><?php echo esc_html($response->get_error_message()); ?></p>
                        </div>
                        <?php
                    } else if ($response['response']['code'] == 200 && isset($response['body'])) {
                        $stories = json_decode($response['body'])->stories;
                        if ($stories && count($stories) > 0) {
                            foreach ($stories as $story) {
                                $args = array(
                                 'meta_query' => array(
                                  array(
                                   'key' => 'cleverpush_story_id',
                                   'value' => $story->_id
                                  )
                                 ),
                                 'post_type' => 'cleverpush_story'
                                );
                                $existing_posts = get_posts($args);

                                if (count($existing_posts) < 1) {
                                    $post_id = wp_insert_post(
                                        array(
                                        'post_title' => $story->title,
                                        'post_name' => $story->title,
                                        'post_type' => 'cleverpush_story',
                                        'post_status' => 'publish'
                                        )
                                    );
                                    if ($post_id) {
                                        add_post_meta($post_id, 'cleverpush_story_id', $story->_id);
                                    }
                                } else {
                                    foreach ( $existing_posts as $post ) {
                                                    wp_update_post(
                                                        array(
                                                        'ID'           => $post->ID,
                                                        'post_title' => $story->title,
                                                        'post_name' => $story->title,
                                                        ) 
                                                    );
                                    }
                                }

                                delete_transient('cleverpush_story_' . $story->_id . '_content');
                                delete_transient('cleverpush_story_' . $story->_id . '_time');
                            }

                            ?>

                            <div class="notice updated"><p>Die Stories wurden erfolgreich synchronisiert.</p></div>

                            <?php
                        } else {
                            ?>
                            <div class="error notice"><p>Es wurden keine CleverPush Stories gefunden.</p></div>
                            <?php
                        }
                    } else if (!empty($response['response'])) {
                        ?>
                          <div class="error notice"><p>API Error: <?php echo esc_html($response['response']['message']); ?></p></div>
                          <?php
                    }
                }

                if (!empty($selected_channel_id) 
                    && !empty($api_key_private) 
                    && get_option('cleverpush_preview_access_enabled') == 'on' 
                    && !empty($selected_channel) 
                    && (empty($selected_channel->wordpressPreviewAccessEnabled) || $selected_channel->wordpressPreviewAccessEnabled == false)
                ) {
                    try {
                        CleverPush_Api::update_channel(
                            $selected_channel_id, array(
                            'wordpressPreviewAccessEnabled' => true
                            )
                        );
                    } catch (Exception $ex) {

                    }
                }
            }

            ?>

            <div class="wrap">
                <h2>CleverPush</h2>
                <p>
                    <?php
                    echo wp_kses(
                        sprintf(
                            __('You need to have a %s account with an already set up channel to use this plugin. Please then select your channel below.', 'cleverpush'),
                            '<a target="_blank" href="https://cleverpush.com/">CleverPush</a>'
                        ),
                        array(
                          'a' => array(
                            'href' => array(),
                            'target' => array()
                          )
                        )
                    );
                    ?>
                </p>
                <p>
                    <?php
                    echo wp_kses(
                        sprintf(
                            __('The API key can be found in the %s.', 'cleverpush'),
                            '<a href="https://cleverpush.com/app/settings/api" target="_blank">' . __('API settings', 'cleverpush') . '</a>'
                        ),
                        array(
                          'a' => array(
                            'href' => array(),
                            'target' => array()
                          )
                        )
                    );
                    ?>
                </p>

                <form method="post" action="options.php">
                    <?php settings_fields('cleverpush_options'); ?>

                    <table class="form-table">

                        <tr valign="top">
                            <th scope="row"><?php _e('Private API-Key', 'cleverpush'); ?></th>
                            <td><input type="text" name="cleverpush_apikey_private"
                                    value="<?php echo esc_attr(get_option('cleverpush_apikey_private')); ?>" style="width: 320px; font-family: monospace;"/></td>
                        </tr>

                        <tr valign="top">
                            <th scope="row"><?php _e('Select Channel', 'cleverpush'); ?></th>
                            <td>
                                <?php if (!empty($api_key_private)) {
                                    if (!empty($channels) && count($channels) > 0) {
                                        ?>
                                        <select name="cleverpush_channel_id">
                                            <option value="" <?php echo esc_attr(empty($selected_channel_id) ? 'selected' : ''); ?>><?php echo esc_html(__('Select Channel', 'cleverpush')); ?>...</option>
                                        <?php
                                        foreach ($channels as $channel) {
                                            ?>
                                                <option
                                                    value="<?php echo esc_attr($channel->_id); ?>"
                                            <?php echo esc_attr($selected_channel_id == $channel->_id ? 'selected' : ''); ?>
                                                >
                                            <?php echo esc_html($channel->name); ?>
                                                </option>
                                            <?php
                                        }
                                        ?>
                                        </select>
                                        <?php
                                    } else {
                                        ?>
                                        <?php _e('No channels available', 'cleverpush'); ?>
                                        <?php
                                    }
                                } else { ?>
                                    <?php _e('Please enter your API keys first', 'cleverpush'); ?>
                                <?php } ?>
                            </td>
                        </tr>

                        <tr valign="top">
                            <th scope="row"><?php _e('Notification headlines', 'cleverpush'); ?></th>
                            <td>
                                <input type="checkbox" name="cleverpush_notification_title_required" id="cleverpush_notification_title_required" <?php echo esc_attr(get_option('cleverpush_notification_title_required') == 'on' ? 'checked' : ''); ?> />
                <label for="cleverpush_notification_title_required"><?php _e('Custom notification headline required', 'cleverpush'); ?></label>
                            </td>
                        </tr>

                        <tr valign="top">
                            <th scope="row"><?php _e('Post types', 'cleverpush'); ?></th>
                            <td>
                                    <?php foreach ( get_post_types([ 'public' => true ], 'objects') as $post_type ): ?>
                                        <?php if ($post_type->name !== 'post') : ?>
                                        <div style="margin-bottom: 5px;">
                                            <input type="checkbox" name="cleverpush_post_types[]" id="cleverpush_post_types-<?php echo $post_type->name; ?>" value="<?php echo esc_attr($post_type->name); ?>" <?php echo esc_attr(!empty(get_option('cleverpush_post_types')) && in_array($post_type->name, get_option('cleverpush_post_types')) ? 'checked' : ''); ?> />
                      <label for="cleverpush_post_types-<?php echo esc_attr($post_type->name); ?>"><?php echo esc_html($post_type->labels->singular_name); ?></label>
                                        </div>
                                        <?php endif; ?>

                                    <?php endforeach; ?>
                            </td>
                        </tr>

                        <tr valign="top">
                            <th scope="row"><?php _e('CleverPush stories', 'cleverpush'); ?></th>
                            <td>
                                <input type="checkbox" name="cleverpush_stories_enabled" id="cleverpush_stories_enabled" <?php echo esc_attr(get_option('cleverpush_stories_enabled') == 'on' ? 'checked' : ''); ?> />
                <label for="cleverpush_stories_enabled"><?php _e('CleverPush stories enabled', 'cleverpush'); ?></label>
                            </td>
                        </tr>

                        <tr valign="top">
                            <th scope="row"><?php _e('Unpublished posts', 'cleverpush'); ?></th>
                            <td>
                                <input type="checkbox" name="cleverpush_preview_access_enabled" id="cleverpush_preview_access_enabled" <?php echo esc_attr(get_option('cleverpush_preview_access_enabled') == 'on' ? 'checked' : ''); ?> />
                <label for="cleverpush_preview_access_enabled"><?php _e('Allow CleverPush to access unpublished posts in order to load preview data', 'cleverpush'); ?></label>
                            </td>
                        </tr>

                        <tr valign="top">
                            <th scope="row"><?php _e('Domain Replacement', 'cleverpush'); ?></th>
                            <td>
                                <input type="checkbox" name="cleverpush_enable_domain_replacement" id="cleverpush_enable_domain_replacement" <?php echo esc_attr(get_option('cleverpush_enable_domain_replacement') == 'on' ? 'checked' : ''); ?> id="cleverpush_enable_domain_replacement" />
                <label for="cleverpush_enable_domain_replacement"><?php _e('Domain Replacement enabled', 'cleverpush'); ?></label>
                            </td>
                        </tr>
            <tr valign="top" class="cleverpush-replacement-domain">
              <th scope="row"><?php _e('Replacement Domain', 'cleverpush'); ?></th>
              <td><input type="text" name="cleverpush_replacement_domain"
                        value="<?php echo esc_attr(get_option('cleverpush_replacement_domain')); ?>" style="width: 320px;"/></td>
            </tr>

            <tr valign="top">
              <th scope="row"><?php _e('CleverPush Script', 'cleverpush'); ?></th>
              <td>
                <input type="checkbox" name="cleverpush_script_disabled" id="cleverpush_script_disabled" <?php echo esc_attr(get_option('cleverpush_script_disabled') == 'on' ? 'checked' : ''); ?> id="cleverpush_script_disabled" />
                <label for="cleverpush_script_disabled"><?php _e('Do not output CleverPush script', 'cleverpush'); ?></label>
              </td>
            </tr>

            <tr valign="top">
              <th scope="row"></th>
              <td>
                <input type="checkbox" name="cleverpush_script_blocked_consentmanager_enabled" id="cleverpush_script_blocked_consentmanager_enabled" <?php echo esc_attr(get_option('cleverpush_script_blocked_consentmanager_enabled') == 'on' ? 'checked' : ''); ?> />
                <label for="cleverpush_script_blocked_consentmanager_enabled"><?php _e('Output CleverPush script in blocked mode (Consentmanager)', 'cleverpush'); ?></label>
              </td>
            </tr>

            <tr valign="top">
              <th scope="row"><?php _e('Feed', 'cleverpush'); ?></th>
              <td>
                <input type="checkbox" name="cleverpush_feed_enabled" id="cleverpush_feed_enabled" <?php echo esc_attr(get_option('cleverpush_feed_enabled') == 'on' ? 'checked' : ''); ?> />
                <label for="cleverpush_feed_enabled"><?php _e('Enable RSS Feed for old articles', 'cleverpush'); ?></label>

                <?php if (get_option('cleverpush_feed_enabled') == 'on') : ?>

                  <div style="margin: 10px 0;">Show articles with a maximum age of <input type="number" name="cleverpush_feed_maximum_days" id="cleverpush_feed_maximum_days" value="<?php echo esc_attr(get_option('cleverpush_feed_maximum_days')); ?>" style="width: 100px;" min="0" step="1" /> days in the feed</div>

                  <div style="margin: 10px 0;">Show maximum <input type="number" name="cleverpush_feed_maximum_articles" id="cleverpush_feed_maximum_articles" value="<?php echo esc_attr(get_option('cleverpush_feed_maximum_articles')); ?>" style="width: 100px;" min="0" step="1" /> articles in the feed</div>

                  <div style="margin: 10px 0;">Feed URL: <a href="<?php echo get_home_url() . $this->get_plugin_path() . '/cleverpush-feed.php'; ?>" target="_blank"><?php echo get_home_url() . $this->get_plugin_path() . '/cleverpush-feed.php'; ?></a></div>

                <?php endif; ?>
              </td>
            </tr>

            <?php if (function_exists('amp_is_request')) : ?>
              <tr valign="top">
                <th scope="row"><?php _e('AMP Integration', 'cleverpush'); ?></th>
                <td>
                  <input type="checkbox" name="cleverpush_amp_enabled" id="cleverpush_amp_enabled" <?php echo esc_attr(get_option('cleverpush_amp_enabled') == 'on' ? 'checked' : ''); ?> id="cleverpush_amp_enabled" />
                  <label for="cleverpush_amp_enabled"><?php _e('AMP Integration enabled', 'cleverpush'); ?></label>
                </td>
              </tr>
              <tr valign="top">
                <th scope="row"><?php _e('AMP Widget Position', 'cleverpush'); ?></th>
                <td>
                  <input type="radio" name="cleverpush_amp_widget_position" id="cleverpush_amp_widget_position" <?php echo esc_attr(empty(get_option('cleverpush_amp_widget_position')) || get_option('cleverpush_amp_widget_position') == 'bottom' ? 'checked' : ''); ?> value="bottom" id="cleverpush_amp_widget_position_bottom" />
                  <label for="cleverpush_amp_widget_position_bottom"><?php _e('Bottom', 'cleverpush'); ?></label>
                  <input type="radio" name="cleverpush_amp_widget_position" id="cleverpush_amp_widget_position" <?php echo esc_attr(get_option('cleverpush_amp_widget_position') == 'top' ? 'checked' : ''); ?> value="top" id="cleverpush_amp_widget_position_top" style="margin-left: 10px;" />
                  <label for="cleverpush_amp_widget_position_top"><?php _e('Top', 'cleverpush'); ?></label>
                </td>
              </tr>
            <?php endif; ?>
                    </table>

                    <p class="submit">
            <input type="submit" class="button-primary" value="<?php _e('Save Changes', 'cleverpush') ?>"/>
          </p>
                </form>

                <script>
                jQuery(document).ready(function() {
            <?php if (get_option('cleverpush_enable_domain_replacement') == 'on') { ?>
                        jQuery('.cleverpush-replacement-domain').show();
            <?php } else { ?>
                        jQuery('.cleverpush-replacement-domain').hide();
            <?php } ?>

                    jQuery('#cleverpush_enable_domain_replacement').change(function() {
                        if (this.checked) {
                            jQuery('.cleverpush-replacement-domain').show();
                        } else {
                            jQuery('.cleverpush-replacement-domain').hide();
                        }
                    });
                });
                </script>

            <?php if (!empty($api_key_private) && get_option('cleverpush_stories_enabled') == 'on') : ?>
                    <hr />
                    <br />

                    <form method="post" action="">
                        <input type="hidden" name="cleverpush_action" value="synchronize_stories">
                        <p class="submit"><input type="submit" class="button-secondary" value="CleverPush Stories synchronisieren" /></p>
                    </form>
            <?php endif; ?>
            </div>

            <?php
            $last_error = get_option('cleverpush_notification_error');
            update_option('cleverpush_notification_error', null);

            if (!empty($last_error)) {
                ?>

          <div class="error notice">
                <?php
                echo esc_html($last_error);
                ?>
          </div>

                <?php
            }
        }

        public function cleverpush_story_template($single)
        {
            global $post;

            if (!empty($post) && $post->post_type == 'cleverpush_story') {
                remove_action('wp_head', 'print_emoji_detection_script', 7);
                remove_action('wp_print_styles', 'print_emoji_styles');
                remove_action('wp_head', 'rest_output_link_wp_head');
                remove_action('wp_head', 'wp_oembed_add_discovery_links');
                remove_action('template_redirect', 'rest_output_link_header', 11, 0);
                remove_action('wp_head', 'wp_generator');
                remove_action('wp_head', 'rsd_link');
                remove_action('wp_head', 'wlwmanifest_link');
                remove_theme_support('automatic-feed-links');
                add_theme_support('title-tag');
                add_filter('show_admin_bar', '__return_false');

                $cleverpushId = get_post_meta($post->ID, 'cleverpush_story_id', true);
                $cleverpushContent = get_transient('cleverpush_story_' . $cleverpushId . '_content');
                $cleverpushTime = get_transient('cleverpush_story_' . $cleverpushId . '_time');
                $apiKey = get_option('cleverpush_apikey_private');
                $channelId = get_option('cleverpush_channel_id');

                if (false === $cleverpushContent || ($cleverpushTime < (time() - (60 * 30))) ) {
                    $response = wp_remote_get('https://api.cleverpush.com/channel/' . $channelId . '/story/' . $cleverpushId, array( 'headers' => array( 'Authorization' => $apiKey )));
                    if ($response['response']['code'] == 200 && isset($response['body'])) {
                           $story = json_decode($response['body']);
                           $cleverpushTime = time();
                           $cleverpushContent = $story->code . "\n<!-- cache time: " . date('Y-m-d H:m:s', $cleverpushTime) . " -->";
                           set_transient('cleverpush_story_' . $cleverpushId . '_content', $cleverpushContent, 60 * 60 * 24 * 3);
                           set_transient('cleverpush_story_' . $cleverpushId . '_time', $cleverpushTime, 60 * 30);
                    }
                }

                add_action(
                    'wp_head', function () use ($cleverpushContent) {
                        echo preg_replace("#</?(head)[^>]*>#i", "", $cleverpushContent);
                    }
                );

                $path = plugin_dir_path(__FILE__) . 'cleverpush-story.php';
                if (file_exists($path)) {
                    return $path;
                }
            }
            return $single;
        }

        public function is_amp_request()
        {
            if (function_exists('amp_is_request')) {
                return amp_is_request();
            }
            return false;
        }

        public function amp_post_template_css()
        {
            include 'cleverpush-amp-styles.php';
            echo cleverpush_amp_styles();
        }

        public function amp_head_css()
        {
            if ($this->is_amp_request()) {
                include 'cleverpush-amp-styles.php';
                echo '<style>';
                echo cleverpush_amp_styles();
                echo '</style>';
            }
        }

        public function amp_post_template_body_open()
        {
            if ($this->is_amp_request()) {
                $confirm_title = 'Push Nachrichten aktivieren';
                $confirm_text = 'Kann jederzeit in den Browser Einstellungen deaktiviert werden';
                $allow_text = 'Aktivieren';
                $deny_text = 'Nein, danke';

                $channel = get_option('cleverpush_channel_config');
                if (!empty($channel) && !empty($channel->alertLocalization)) {
                    if (!empty($channel->alertLocalization->title)) {
                        $confirm_title = $channel->alertLocalization->title;
                    }
                    if (!empty($channel->alertLocalization->info)) {
                        $confirm_text = $channel->alertLocalization->info;
                    }
                    if (!empty($channel->alertLocalization->allow)) {
                        $allow_text = $channel->alertLocalization->allow;
                    }
                    if (!empty($channel->alertLocalization->deny)) {
                        $deny_text = $channel->alertLocalization->deny;
                    }
                }

                ?>
          <amp-script layout="fixed-height" height="1" src="<?php echo get_site_url() . $this->get_plugin_path(); ?>/cleverpush-amp.js.php">
            <div>&nbsp;</div>

            <amp-web-push-widget visibility="unsubscribed" layout="fixed" width="300" height="300" hidden data-amp-bind-hidden="cleverpushConfirmVisible != true">
              <div class="cleverpush-confirm">
                <div class="cleverpush-confirm-title"><?php echo $confirm_title; ?></div>

                <div class="cleverpush-confirm-text"><?php echo $confirm_text; ?></div>

                <div class="cleverpush-confirm-buttons">
                  <button id="cleverpush-button-deny" class="cleverpush-confirm-button" on="tap:AMP.setState({cleverpushConfirmVisible: false})">
                    <?php echo $deny_text; ?>
                  </button>

                  <button id="cleverpush-button-allow" class="cleverpush-confirm-button cleverpush-confirm-button-allow" on="tap:amp-web-push.subscribe">
                    <?php echo $allow_text; ?>
                  </button>
                </div>
              </div>
            </amp-web-push-widget>
          </amp-script>
                <?php
            }
        }

        public function amp_post_template_footer()
        {
            if ($this->is_amp_request()) {
                ?>
          <amp-web-push
            id="amp-web-push"
            layout="nodisplay"
            helper-iframe-url="<?php echo get_site_url() . $this->get_plugin_path(); ?>/cleverpush-amp-helper-frame.html"
            permission-dialog-url="<?php echo get_site_url() . $this->get_plugin_path(); ?>/cleverpush-amp-permission-dialog.html"
            service-worker-url="<?php echo get_site_url() . $this->get_worker_url(); ?>"
          >
          </amp-web-push>
                <?php
            }
        }

        public function cleverpush_rss_item()
        {
            global $post;
            $metaValue = get_post_meta($post->ID, 'cleverpush_disable_feed', true);
            if ($metaValue) {
                echo "<dc:contributor>cleverpush:disabled</dc:contributor>";
            }
        }
    }

    $cleverPush = new CleverPush(__FILE__);

endif;