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📝 Editing: init.php

<?php
if (!defined('WPINC')) {
	die;
}

class CSMM {
  static function init() {
    if (is_admin()) {
      add_action('admin_action_csmm_change_status', array(__CLASS__, 'change_status'));
    }

// admin bar notice for frontend & backend
    add_action('wp_before_admin_bar_render', array(__CLASS__, 'admin_bar'));
    add_action('wp_head', array(__CLASS__, 'admin_bar_style'));
    add_action('admin_head', array(__CLASS__, 'admin_bar_style'));
  }

static function admin_bar_style() {
    $options = csmm_get_options();

if (isset($_POST['signals_csmm_submit']) && isset($_POST['csmm_save_nonce']) && wp_verify_nonce(sanitize_text_field(wp_unslash($_POST['csmm_save_nonce'])), 'csmm_save_settings')) {
      $options['disable_adminbar'] = isset($_POST['signals_csmm_disable_adminbar']);
    }

// admin bar has to be anabled, user an admin and custom filter true
    if ($options['disable_adminbar'] || false === is_admin_bar_showing() || false === current_user_can('manage_options') || false === apply_filters('csmm_show_admin_bar', true)) {
      return;
    }

// no sense in loading a new CSS file for 2 lines of CSS
 $custom_css = '<style type="text/css">#wpadminbar i.csmm-status-dot { font-size: 17px; margin-top: -7px; color: #02ca02; height: 17px; display: inline-block; } #wpadminbar i.csmm-status-dot-enabled { color: #64bd63; } #wpadminbar i.csmm-status-dot-disabled { color: #FE2D2D; } #wpadminbar #csmm-status-wrapper { display: inline; border: 1px solid rgba(240,245,250,0.7); padding: 0; margin: 0 0 0 5px; background: rgb(35, 40, 45); } #wpadminbar .csmm-status-btn { padding: 0 7px; color: #fff; } #wpadminbar #csmm-status-wrapper.off #csmm-status-off { background: #FE2D2D;} #wpadminbar #csmm-status-wrapper.on #csmm-status-on { background: #64bd63; }#wp-admin-bar-csmm img.logo { height: 17px; margin-bottom: 4px; padding-right: 3px; } #wp-admin-bar-csmm a img { height: 18px; margin-bottom: -4px; padding-right: 3px; } #wpadminbar #wp-admin-bar-csmm-status .ab-empty-item { margin-bottom: 2px; }</style>';

self::wp_kses_wf($custom_css);
  } // admin_bar_style

// add admin bar menu and status
  static function admin_bar() {
    global $wp_admin_bar;
    $options = csmm_get_options();

// only show to admins
    if ($options['disable_adminbar'] || false === current_user_can('manage_options') || false === apply_filters('csmm_show_admin_bar', true)) {
      return;
    }

$options = csmm_get_options();

if (isset($_POST['signals_csmm_submit'])) {
      $options['status'] = (string) (int) !empty($_POST['signals_csmm_status']);
    }
    if(isset($_SERVER['REQUEST_URI'])){
      $redirect_url = sanitize_text_field(wp_unslash($_SERVER['REQUEST_URI']));
    } else {
      $redirect_url = '';
    }

if ($options['status'] == '1') {
 $main_label = '<img src="' . CSMM_URL . '/framework/admin/img/mm-icon.png" alt="' . __('Maintenance mode is enabled', 'minimal-coming-soon-maintenance-mode') . '" title="' . __('Maintenance mode is enabled', 'minimal-coming-soon-maintenance-mode') . '"> ' . __('Maintenance Mode', 'minimal-coming-soon-maintenance-mode') . ' &#9679;';
 $class = 'csmm-enabled';
 $action_url = add_query_arg(array('action' => 'csmm_change_status', 'new_status' => 'disabled', 'redirect' => urlencode($redirect_url)), admin_url('admin.php'));
 $action_url = wp_nonce_url($action_url, 'csmm_change_status');
 $action = __('Maintenance mode', 'minimal-coming-soon-maintenance-mode');
 $action .= '<a href="' . $action_url . '" id="csmm-status-wrapper" class="on">OFFON</a>';
 } else {
 $main_label = '<img src="' . CSMM_URL . '/framework/admin/img/mm-icon.png" alt="' . __('Maintenance mode is disabled', 'minimal-coming-soon-maintenance-mode') . '" title="' . __('Maintenance mode is disabled', 'minimal-coming-soon-maintenance-mode') . '"> ' . __('Maintenance Mode', 'minimal-coming-soon-maintenance-mode') . ' &#9679;';
 $class = 'csmm-disabled';
 $action_url = add_query_arg(array('action' => 'csmm_change_status', 'new_status' => 'enabled', 'redirect' => urlencode($redirect_url)), admin_url('admin.php'));
 $action_url = wp_nonce_url($action_url, 'csmm_change_status');
 $action = __('Maintenance mode', 'minimal-coming-soon-maintenance-mode');
 $action .= '<a href="' . $action_url . '" id="csmm-status-wrapper" class="off">OFFON</a>';
 }

$wp_admin_bar->add_menu(array(
      'parent' => '',
      'id'     => 'csmm',
      'title'  => $main_label,
      'href'   => admin_url('options-general.php?page=maintenance_mode_options'),
      'meta'   => array('class' => $class)
    ));
    $wp_admin_bar->add_node( array(
      'id'    => 'csmm-status',
      'title' => $action,
      'href'  => false,
      'parent'=> 'csmm'
    ));
    $wp_admin_bar->add_node( array(
      'id'     => 'csmm-preview',
      'title'  => 'Preview',
      'href'   => wp_nonce_url(home_url() . '/?preview_coming_soon', 'csmm_preview'),
      'parent' => 'csmm',
      'meta'   => array('target' => '_blank')
    ));
    $wp_admin_bar->add_node( array(
      'id'     => 'csmm-settings',
      'title'  => 'Settings',
      'href'   => admin_url('options-general.php?page=maintenance_mode_options'),
      'parent' => 'csmm'
    ));
  } // admin_bar

// change status via admin bar
  static function change_status() {
    check_admin_referer('csmm_change_status');

if (empty($_GET['new_status'])) {
      wp_safe_redirect(admin_url());
      exit;
    }

$options = csmm_get_options();

if (sanitize_key($_GET['new_status']) == 'enabled') {
      $options['status'] = '1';
    } else {
      $options['status'] = '2';
    }

update_option('signals_csmm_options', $options);

if (!empty($_GET['redirect'])) {
      wp_safe_redirect(sanitize_url(wp_unslash($_GET['redirect'])));
    } else {
      wp_safe_redirect(admin_url());
    }

exit;
  } // change_status

static function wp_kses_wf($html)
    {
        if(empty($html)){
            return '';
        }
        
        add_filter('safe_style_css', function ($styles) {
            $styles_wf = array(
                'text-align',
                'margin',
                'color',
                'float',
                'border',
                'background',
                'background-color',
                'border-bottom',
                'border-bottom-color',
                'border-bottom-style',
                'border-bottom-width',
                'border-collapse',
                'border-color',
                'border-left',
                'border-left-color',
                'border-left-style',
                'border-left-width',
                'border-right',
                'border-right-color',
                'border-right-style',
                'border-right-width',
                'border-spacing',
                'border-style',
                'border-top',
                'border-top-color',
                'border-top-style',
                'border-top-width',
                'border-width',
                'caption-side',
                'clear',
                'cursor',
                'direction',
                'font',
                'font-family',
                'font-size',
                'font-style',
                'font-variant',
                'font-weight',
                'height',
                'letter-spacing',
                'line-height',
                'margin-bottom',
                'margin-left',
                'margin-right',
                'margin-top',
                'overflow',
                'padding',
                'padding-bottom',
                'padding-left',
                'padding-right',
                'padding-top',
                'text-decoration',
                'text-indent',
                'vertical-align',
                'width',
                'display',
            );

foreach ($styles_wf as $style_wf) {
                $styles[] = $style_wf;
            }
            return $styles;
        });

$allowed_tags = wp_kses_allowed_html('post');
        $allowed_tags['input'] = array(
            'type' => true,
            'style' => true,
            'class' => true,
            'id' => true,
            'checked' => true,
            'disabled' => true,
            'name' => true,
            'size' => true,
            'placeholder' => true,
            'value' => true,
            'data-*' => true,
            'size' => true,
            'disabled' => true,
            'autocomplete' => true
        );

$allowed_tags['textarea'] = array(
            'type' => true,
            'style' => true,
            'class' => true,
            'id' => true,
            'checked' => true,
            'disabled' => true,
            'name' => true,
            'size' => true,
            'placeholder' => true,
            'value' => true,
            'data-*' => true,
            'cols' => true,
            'rows' => true,
            'disabled' => true,
            'autocomplete' => true
        );

$allowed_tags['select'] = array(
            'type' => true,
            'style' => true,
            'class' => true,
            'id' => true,
            'checked' => true,
            'disabled' => true,
            'name' => true,
            'size' => true,
            'placeholder' => true,
            'value' => true,
            'data-*' => true,
            'multiple' => true,
            'disabled' => true
        );

$allowed_tags['strong'] = array(
            'type' => true,
            'style' => true,
            'class' => true
        );

$allowed_tags['option'] = array(
            'type' => true,
            'style' => true,
            'class' => true,
            'id' => true,
            'checked' => true,
            'disabled' => true,
            'name' => true,
            'size' => true,
            'placeholder' => true,
            'value' => true,
            'selected' => true,
            'data-*' => true
        );
        $allowed_tags['optgroup'] = array(
            'type' => true,
            'style' => true,
            'class' => true,
            'id' => true,
            'checked' => true,
            'disabled' => true,
            'name' => true,
            'size' => true,
            'placeholder' => true,
            'value' => true,
            'selected' => true,
            'data-*' => true,
            'label' => true
        );

$allowed_tags['a'] = array(
            'href' => true,
            'data-*' => true,
            'class' => true,
            'style' => true,
            'id' => true,
            'target' => true,
            'data-*' => true,
            'role' => true,
            'aria-controls' => true,
            'aria-selected' => true,
            'disabled' => true
        );

$allowed_tags['div'] = array(
            'style' => true,
            'class' => true,
            'id' => true,
            'data-*' => true,
            'role' => true,
            'aria-labelledby' => true,
            'value' => true,
            'aria-modal' => true,
            'tabindex' => true
        );

$allowed_tags['li'] = array(
            'style' => true,
            'class' => true,
            'id' => true,
            'data-*' => true,
            'role' => true,
            'aria-labelledby' => true,
            'value' => true,
            'aria-modal' => true,
            'tabindex' => true
        );

$allowed_tags['span'] = array(
            'style' => true,
            'class' => true,
            'id' => true,
            'data-*' => true,
            'aria-hidden' => true
        );

$allowed_tags['style'] = array(
            'class' => true,
            'id' => true,
            'type' => true
        );

$allowed_tags['fieldset'] = array(
            'class' => true,
            'id' => true,
            'type' => true
        );

$allowed_tags['link'] = array(
            'class' => true,
            'id' => true,
            'type' => true,
            'rel' => true,
            'href' => true,
            'media' => true
        );

$allowed_tags['form'] = array(
            'style' => true,
            'class' => true,
            'id' => true,
            'method' => true,
            'action' => true,
            'data-*' => true
        );

$allowed_tags['script'] = array(
            'class' => true,
            'id' => true,
            'type' => true,
            'src' => true
        );

echo wp_kses($html, $allowed_tags);

add_filter('safe_style_css', function ($styles) {
            $styles_wf = array(
                'text-align',
                'margin',
                'color',
                'float',
                'border',
                'background',
                'background-color',
                'border-bottom',
                'border-bottom-color',
                'border-bottom-style',
                'border-bottom-width',
                'border-collapse',
                'border-color',
                'border-left',
                'border-left-color',
                'border-left-style',
                'border-left-width',
                'border-right',
                'border-right-color',
                'border-right-style',
                'border-right-width',
                'border-spacing',
                'border-style',
                'border-top',
                'border-top-color',
                'border-top-style',
                'border-top-width',
                'border-width',
                'caption-side',
                'clear',
                'cursor',
                'direction',
                'font',
                'font-family',
                'font-size',
                'font-style',
                'font-variant',
                'font-weight',
                'height',
                'letter-spacing',
                'line-height',
                'margin-bottom',
                'margin-left',
                'margin-right',
                'margin-top',
                'overflow',
                'padding',
                'padding-bottom',
                'padding-left',
                'padding-right',
                'padding-top',
                'text-decoration',
                'text-indent',
                'vertical-align',
                'width'
            );

foreach ($styles_wf as $style_wf) {
                if (($key = array_search($style_wf, $styles)) !== false) {
                    unset($styles[$key]);
                }
            }
            return $styles;
        });
    }
} // class csmm

add_action('init', array('CSMM', 'init'));

// helper function to generate tagged buy links
  function csmm_generate_web_link($placement = '', $page = '/', $params = array(), $anchor = '') {
    $base_url = 'https://comingsoonwp.com';

if ('/' != $page) {
      $page = '/' . trim($page, '/') . '/';
    }
    if ($page == '//') {
      $page = '/';
    }

if ($placement) {
      $placement = trim($placement, '-');
      $placement = '-' . $placement;
    }

$parts = array_merge(array('ref' => 'csmm-free' . $placement), $params);

if (!empty($anchor)) {
      $anchor = '#' . trim($anchor, '#');
    }

$out = $base_url . $page . '?' . http_build_query($parts, '', '&amp;') . $anchor;

return $out;
  } // generate_web_link