functions.php

<?php

if (WP_DEBUG) {
  ini_set('display_startup_errors', 1);
  ini_set('display_errors', 1);
  error_reporting(-1);
}

function register_menus() {
  // register_nav_menus(array(
  //   'primary' => __('Primary Menu', 'splus'),
  //   'footer' => __('Footer Menu', 'splus')
  // ));

  register_nav_menu('primary', __('Primary Menu'));
  register_nav_menu('footer', __('Footer Menu'));
}

//add_action('after_setup_theme', 'register_menus');

function register_meta_box() {
  add_meta_box('meta1', __('Visibility'), 'meta_box_callback', null, 'side', 'high');
}

function meta_box_callback($post) {
  wp_nonce_field('save_meta_box_data', 'meta_box_nonce');

  $value = get_post_meta($post->ID, '_meta_is_private', true);
  $public = $value == 'public' ? 'selected' : '';
  $private = $value == 'private' ? 'selected' : '';

  $o  = '<label for="meta_box_private_field">Visibility </label>';
  $o .= '<select name="meta_box_private_field" id="meta_box_private_field">';
  $o .= '<option value="public" ' . $public . '>Public</option>';
  $o .= '<option value="private" ' . $private . '>Private</option>';
  $o .= '</select>';

  echo $o;
}

function meta_box_save_data($post_id) {
  if (
    !isset($_POST['meta_box_nonce']) ||
    !wp_verify_nonce($_POST['meta_box_nonce'], 'save_meta_box_data') ||
    (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) ||
    !current_user_can('edit_post', $post_id) ||
    !isset($_POST['meta_box_private_field'])
  ) return;

  $data = $_POST['meta_box_private_field'];

  update_post_meta($post_id, '_meta_is_private' , $data);
}

add_action('add_meta_boxes', 'register_meta_box');
add_action('save_post', 'meta_box_save_data');

function theme_update($transient) {
  if (WP_DEBUG) {
    return $transient;
  }

  $response = wp_remote_get('https://raw.githubusercontent.com/nmcardoso/splus-theme/zipball/version.txt');
  if (is_wp_error($response)) {
    return $transient;
  }

  $curr_version = get_site_option('splus_theme_version', 'none');
  $remote_version = $response['body'];
  
  if ($curr_version !== $remote_version) {
    $fields = array();
    $fields['theme'] = 'splus-theme';
    $fields['new_version'] = $remote_version;
    $fields['url'] = "https://example.com";
    $fields['package'] = 'https://github.com/nmcardoso/splus-theme/blob/zipball/zipball.zip?raw=true';
    $fields['requires'] = '4.0';
    $fields['requires_php'] = '5.6';
    //$transient = get_site_transient('update_themes');
    $transient->response['splus-theme'] = $fields;
    //set_site_transient('update_themes', $transient);
  }
  
  return $transient;
}

add_filter('pre_set_site_transient_update_themes', 'theme_update');

function theme_version_setup($upgrader, $hook_extra) {
  $response = wp_remote_get('https://raw.githubusercontent.com/nmcardoso/splus-theme/zipball/version.txt');
  if (is_wp_error($response)) {
    return;
  }

  $curr_version = get_site_option('splus_theme_version', 'none');
  $remote_version = $response['body'];
  
  update_site_option('splus_theme_version', $remote_version);
}

add_action('upgrader_process_complete', 'theme_version_setup');

function theme_setup() {
  register_menus();
  add_theme_support('post-thumbnails');
  //theme_version_setup();
}

add_action('after_setup_theme', 'theme_setup');

function redirect_subscribers() {
  if (current_user_can('subscriber')) {
    wp_redirect(home_url());
    exit;
  }
}

add_action('admin_init', 'redirect_subscribers');

function block_unauthorized_users($user, $username, $password) {
  if (is_wp_error($user)) {
    return $user;
  }

  $auth = get_user_meta($user->ID, 'splus_user_authorized', true);
  $user_roles = $user->roles;
  
  if ($auth !== 'true' && count($user_roles) === 1 && in_array('subscriber', $user_roles, true)) {
    return new WP_Error('user_unauthorized', 'User unauthorized. Wait for staff to approve your registration');
  } else {
    return $user;
  }
}

add_filter('authenticate', 'block_unauthorized_users', 99, 3);

function su_spoiler_handler($attrs, $content, $tag) {
  static $index = 1;

  $title = $attrs['title'];
  
  $html = '<div class="pb-2">';
  $html .= '<a class="" data-toggle="collapse" href="#coll' . $index . '">';
  $html .= $title;
  $html .= '</a>';
  $html .= '<div class="collapse" id="coll' . $index . '">';
  $html .= '<div class="card card-body">';
  $html .= do_shortcode($content);
  $html .= '</div>';
  $html .= '</div>';
  $html .= '</div>';

  $index++;

  return $html;
}

add_shortcode('su_spoiler', 'su_spoiler_handler');

function gallery_shortcode_handler($attrs, $content, $tag) {
  $defaults = array(
    'id' => '',
    'class' => ''
  );

  $attrs = shortcode_atts($defaults, $attrs);
  
  if (empty($attrs['id'])) {
    return '';
  }
  
  static $index = 0;
  $index++;

  $ids = explode(',', $attrs['id']);
  $ids = array_map(function ($id) { return (int) trim($id); }, $ids);

  $html = '<div id="carousel-' . $index . '" class="carousel slide ' . $attrs['class'] . '" data-ride="carousel" style="background-color: black; height: 300px; max-height: 100%;">';
  $html .= '<div class="carousel-inner" style="height: 100%;">';

  foreach ($ids as $i => $id) {
    if ($i == 0) {
      $html .= '<div class="carousel-item active" style="height: 100%;">';
    } else {
      $html .= '<div class="carousel-item" style="height: 100%;">';
    }

    $html .= '<img style="position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); ';
    $html .= 'max-height: 800px; width: auto;" src="' . wp_get_attachment_image_src($id, 'original')[0] . '" />';
    $html .= '</div>';
  }

  $html .= '<a href="#carousel-' . $index . '" class="carousel-control-prev" data-slide="prev">';
  $html .= '<span class="carousel-control-prev-icon"></span>';
  $html .= '</a>';
  $html .= '<a href="#carousel-' . $index . '" class="carousel-control-next" data-slide="next">';
  $html .= '<span class="carousel-control-next-icon"></span>';
  $html .= '</a>';

  $html .= '</div>';
  $html .= '</div>';

  return $html;
}

add_shortcode('gallery', 'gallery_shortcode_handler');

function dashboard_menu() {
  add_menu_page(
    'SPLUS Configurations',
    'SPLUS',
    'manage_options',
    'splus-config',
    'dashboard_main_page',
    'dashicons-admin-generic',
    2
  );

  add_submenu_page(
    'splus-config',
    'SPLUS Settings',
    'SPLUS Settings',
    'manage_options',
    'splus-config',
    'dashboard_main_page'
  );

  add_submenu_page(
    'splus-config',
    'Email Settings',
    'Email',
    'manage_options',
    'splus-config-email',
    'dashboard_email_page'
  );
}

add_action('admin_menu', 'dashboard_menu');

function dashboard_main_page() {
  include_once('partials/dashboard-main.php');
}

function dashboard_email_page() {
  include_once('partials/dashboard-email.php');
}

function javascript_user_object() {
  if (is_user_logged_in()) {
    $user = wp_get_current_user();
    $selected_attrs = array(
      'email' => $user->user_email,
      'id' => $user->ID,
      'name' => $user->display_name
    );
    $user_string = json_encode($selected_attrs);
    $output = <<<SCRIPT
<script type="text/javascript">
  var userObj = $user_string
</script>
SCRIPT;
  } else {
    $output = <<<SCRIPT
<script type="text/javascript">
  var userObj =  null;
</script>
SCRIPT;  
  }

  echo $output;
}

add_action('wp_head', 'javascript_user_object');

// Remove top margin for wordpress admin bar
function my_filter_head() {
  remove_action('wp_head', '_admin_bar_bump_cb');
}

add_action('get_header', 'my_filter_head');

function contact_form_handler() {
  include_once 'includes/class-mailer.php';

  $message = $_POST['message'];
  $email = $_POST['email'];
  $name = $_POST['name'];

  $email_content = <<<EMAIL
<p>New message received via website contact form</p>

<p>
User: <span style="text-transform: uppercase;"><b>$name</b></span><br>
Email: <b>$email</b>
</p>

<br>
<p style="font-size: 14px;">$message</p>

<br>
<hr>

<i>Email sent via splus website</i>
EMAIL;

  $mailer = new Mailer();
  $mailer->setSubject("[SPLUS] Contact Form: $name");
  $mailer->addAddress(get_option('splus_smtp_email', 'splus.team@yahoo.com'), 'SPLUS Staff');
  $mailer->html($email_content);
  $mailer->send();

  if (isset($_SERVER['HTTP_REFERER']) && wp_http_validate_url($_SERVER['HTTP_REFERER'])) {
    wp_redirect($_SERVER['HTTP_REFERER']);
  }
}

add_action('admin_post_contact_form', 'contact_form_handler');