/**
* Is there an accept header and the feature is active for the site and the current language is not in the
* noredirect cookie?
*
* @return bool
*/
public function is_redirectable()
{
if (empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
return FALSE;
}
if (!isset($_SESSION) && !session_id()) {
session_start();
}
if (isset($_SESSION['noredirect'])) {
$current_site_language = mlp_get_current_blog_language();
$existing = (array) $_SESSION['noredirect'];
if (in_array($current_site_language, $existing)) {
return FALSE;
}
}
/**
* Filter whether the user should be redirected.
*
* @param bool $do_redirect Redirect or not?
*
* @return bool
*/
if (!apply_filters('mlp_do_redirect', TRUE)) {
return FALSE;
}
return (bool) get_option($this->option_name);
}
/**
* Checks if the current request should be redirected.
*
* Requires an accept header, the redirect feature being active for the current site, and the current language not
* being included in the $_SESSION's noredirect element.
*
* @return bool
*/
public function is_redirectable()
{
if (empty($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
return false;
}
if (!get_option($this->option_name)) {
return false;
}
if (!isset($_SESSION) && !session_id()) {
session_start();
}
if (isset($_SESSION['noredirect'])) {
$current_site_language = mlp_get_current_blog_language();
if (in_array($current_site_language, (array) $_SESSION['noredirect'])) {
return false;
}
}
/**
* Filters if the current request should be redirected.
*
* @param bool $redirect Redirect the current request?
*
* @return bool
*/
return (bool) apply_filters('mlp_do_redirect', true);
}
/**
* Do browser and blog language already correspond?
* Is redirect turned off through session-cookie?
*
* @since 0.1
* @return void
*/
public function check_redirect()
{
// Current blog's language (shortcode)
$current_lang = mlp_get_current_blog_language(2);
// Browser lang = blog lang?
if ($current_lang == $this->defined_browser_lang) {
$this->no_redirect = TRUE;
return;
}
// Cookie check. User might want to
// read some blogs in their original
// language
if (isset($_SESSION['noredirect'])) {
if (in_array($current_lang, $_SESSION['noredirect'])) {
$this->no_redirect = TRUE;
}
}
}
/**
* Get the linked elements and display them as a list
* flag from a blogid
*
* @since 0.1
* @access public
* @param int $blog_id ID of a blog
* @uses mlp_get_available_languages, mlp_get_available_languages_titles, is_single,
* is_page, mlp_get_linked_elements, mlp_get_language_flag, get_current_blog_id,
* get_blog_post, get_site_url
* @return string output of the bloglist
*/
public static function show_linked_elements($args)
{
global $wp_query;
$output = '';
$languages = mlp_get_available_languages();
$language_titles = mlp_get_available_languages_titles();
if (!(0 < count($languages))) {
return $output;
}
// returns NULL if there is no post, get_the_ID() throws a notice,
// if we don' check this before.
$default_post = get_post();
if ($default_post) {
$current_element_id = get_the_ID();
} elseif (!empty($wp_query->queried_object) && !empty($wp_query->queried_object->ID)) {
$current_element_id = $wp_query->queried_object->ID;
} else {
$current_element_id = 0;
}
$linked_elements = array();
// double check to avoid issues with a static front page.
if (!is_front_page() && !is_home() && is_singular()) {
$linked_elements = mlp_get_linked_elements($current_element_id);
}
$defaults = array('link_text' => 'text', 'echo' => TRUE, 'sort' => 'blogid', 'show_current_blog' => FALSE);
$params = wp_parse_args($args, $defaults);
if ('blogid' == $params['sort']) {
ksort($languages);
} else {
asort($languages);
}
$output .= '<div class="mlp_language_box"><ul>';
foreach ($languages as $language_blog => $language_string) {
$current_language = mlp_get_current_blog_language(2);
if ($current_language == $language_string && $params['show_current_blog'] == FALSE) {
continue;
}
// Get params
$flag = mlp_get_language_flag($language_blog);
$title = mlp_get_available_languages_titles(TRUE);
// Display type
if ('flag' == $params['link_text'] && '' != $flag) {
$display = '<img src="' . $flag . '" alt="' . $languages[$language_blog] . '" title="' . $title[$language_blog] . '" />';
} else {
if ('text' == $params['link_text'] && !empty($language_titles[$language_blog])) {
$display = $language_titles[$language_blog];
} else {
if ('text_flag' == $params['link_text']) {
$display = '<img src="' . $flag . '" alt="' . $languages[$language_blog] . '" title="' . $title[$language_blog] . '" />';
if (!empty($language_titles[$language_blog])) {
$display .= ' ' . $language_titles[$language_blog];
}
} else {
$display = $languages[$language_blog];
}
}
}
$class = get_current_blog_id() == $language_blog ? 'id="mlp_current_locale"' : '';
// set element to 0 to avoid empty element
if (!isset($linked_elements[$language_blog])) {
$linked_elements[$language_blog] = 0;
}
// Check post status
$post = $linked_elements[$language_blog] > 0 ? get_blog_post($language_blog, $linked_elements[$language_blog]) : '';
do_action('mlp_before_link');
$link = (is_single() || is_page() || is_home()) && isset($post->post_status) && ('publish' === $post->post_status || 'private' === $post->post_status && is_super_admin()) ? get_blog_permalink($language_blog, $linked_elements[$language_blog]) : get_site_url($language_blog);
// apply filter to help others to change the link
$link = apply_filters('mlp_linked_element_link', $link, $language_blog, $linked_elements[$language_blog]);
do_action('mlp_after_link');
// Output link elements
$output .= '<li ' . ($current_language == $language_string ? 'class="current"' : '') . '><a rel="alternate" hreflang="' . self::get_blog_language($language_blog) . '" ' . $class . ' href="' . $link . '">' . $display . '</a></li>';
}
$output .= '</ul></div>';
return $output;
}