| 1 |
<?php |
| 2 |
|
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// setups basic functions used for admin and frontend |
| 4 |
abstract class Polylang_Base { |
| 5 |
public $post_types; // post types to filter by language |
| 6 |
public $taxonomies; // taxonomies to filter by language |
| 7 |
public $is_ajax_on_front; |
| 8 |
public $is_admin; |
| 9 |
|
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protected $options; |
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protected $home; |
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protected $using_permalinks; |
| 13 |
protected $strings = array(); // strings to translate |
| 14 |
|
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// used to cache results |
| 16 |
// FIXME use wp_cache ? |
| 17 |
private $languages_list = array(); |
| 18 |
private $language = array(); |
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private $links = array(); |
| 20 |
|
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function __construct() { |
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// avoid loading polylang admin filters for frontend ajax requests if 'pll_load_front' is set (thanks to g100g) |
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// FIXME should I permit plugins to overwrite this? |
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$this->is_ajax_on_front = defined('DOING_AJAX') && isset($_REQUEST['pll_load_front']); |
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$this->is_admin = defined('DOING_CRON') || (is_admin() && !$this->is_ajax_on_front); |
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|
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// init options often needed |
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$this->options = get_option('polylang'); |
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$this->home = get_option('home'); |
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$this->using_permalinks = (bool) get_option('permalink_structure'); |
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|
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add_action('wp_loaded', array(&$this, 'add_post_types_taxonomies'), 1); // must come after 'init' to be sure that all post types and taxonomies are registered |
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} |
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|
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// init post types and taxonomies to filter by language |
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function add_post_types_taxonomies() { |
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$post_types = array('post', 'page'); |
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if (!empty($this->options['media_support'])) |
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$post_types[] = 'attachment'; |
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if (!empty($this->options['post_types'])) |
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$post_types = array_merge($post_types, $this->options['post_types']); |
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$this->post_types = apply_filters('pll_get_post_types', array_combine($post_types, $post_types), false); |
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|
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$taxonomies = array('category', 'post_tag', 'nav_menu'); |
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if (!empty($this->options['taxonomies'])) |
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$taxonomies = array_merge($taxonomies, $this->options['taxonomies']); |
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$this->taxonomies = apply_filters('pll_get_taxonomies', array_combine($taxonomies, $taxonomies), false); |
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} |
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|
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// returns the list of available languages |
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function get_languages_list($args = array()) { |
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// although get_terms is cached, it is efficient to add our own cache |
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// FIXME don't use on admin in case we modify the list of languages! |
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if (!$this->is_admin && isset($this->languages_list[$cache_key = md5(serialize($args))])) |
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return $this->languages_list[$cache_key]; |
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|
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$args = wp_parse_args($args, array('hide_empty' => false, 'orderby'=> 'term_group')); |
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$languages = get_terms('language', $args); |
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$languages = empty($languages) || is_wp_error($languages) ? array() : $languages; |
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return isset($cache_key) ? ($this->languages_list[$cache_key] = $languages) : $languages; |
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} |
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|
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// retrieves the dropdown list of the languages |
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function dropdown_languages($args = array()) { |
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$args = apply_filters('pll_dropdown_language_args', $args); |
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$defaults = array('name' => 'lang_choice', 'class' => '', 'add_options' => array(), 'hide_empty' => false, 'value' => 'slug', 'selected' => ''); |
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extract(wp_parse_args($args, $defaults)); |
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|
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// sort $add_options by value |
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uasort($add_options, create_function('$a, $b', "return \$a['value'] > \$b['value'];" )); |
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|
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$out = sprintf( |
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'<select name="%1$s" id="%1$s"%2$s>'."\n", |
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esc_attr($name), |
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$class ? ' class="'.esc_attr($class).'"' : '' |
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); |
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|
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foreach ($add_options as $option) |
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$out .= sprintf( |
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'<option value="%s">%s</option>'."\n", |
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esc_attr($option['value']), |
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esc_html($option['text']) |
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); |
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|
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foreach ($this->get_languages_list($args) as $language) { |
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$out .= sprintf( |
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'<option value="%s"%s>%s</option>'."\n", |
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esc_attr($language->$value), |
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$language->$value == $selected ? ' selected="selected"' : '', |
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esc_html($language->name) |
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); |
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} |
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$out .= "</select>\n"; |
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return $out; |
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} |
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|
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// returns the language by its id or its slug |
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// Note: it seems that get_term_by slug is not cached (3.2.1) |
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function get_language($value) { |
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if (is_object($value)) |
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return $value; |
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|
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if (isset($this->language[$value])) |
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return $this->language[$value]; |
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|
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$lang = (is_numeric($value) || (int) $value) ? get_term((int) $value, 'language') : |
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(is_string($value) ? get_term_by('slug', $value , 'language') : false); |
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|
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return !empty($lang) && !is_wp_error($lang) ? ($this->language[$value] = $lang) : false; |
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} |
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|
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// saves translations for posts or terms |
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// the underscore in '_lang' hides the post meta in the Custom Fields metabox in the Edit Post screen |
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// $type: either 'post' or 'term' |
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// $id: post id or term id |
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// $translations: an associative array of translations with language code as key and translation id as value |
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function save_translations($type, $id, $translations) { |
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$lang = call_user_func(array(&$this, 'get_'.$type.'_language'), $id); |
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if (!$lang) |
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return; |
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|
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if (isset($translations) && is_array($translations)) { |
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$translations = array_merge(array($lang->slug => $id), $translations); |
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foreach($translations as $p) |
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update_metadata($type, (int) $p, '_translations', $translations); |
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} |
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} |
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|
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// deletes a translation of a post or term |
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function delete_translation($type, $id) { |
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$translations = $this->get_translations($type, $id); |
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if (is_array($translations)) { |
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$slug = array_search($id, $translations); |
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unset($translations[$slug]); |
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foreach($translations as $p) |
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update_metadata($type, (int) $p, '_translations', $translations); |
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delete_metadata($type, $id, '_translations'); |
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} |
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} |
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|
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// returns the id of the translation of a post or term |
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// $type: either 'post' or 'term' |
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// $id: post id or term id |
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// $lang: object or slug (in the order of preference latest to avoid) |
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function get_translation($type, $id, $lang) { |
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$translations = $this->get_translations($type, $id); |
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$slug = $this->get_language($lang)->slug; |
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return isset($translations[$slug]) ? (int) $translations[$slug] : false; |
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} |
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|
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// returns an array of translations of a post or term |
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function get_translations($type, $id) { |
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$type = ($type == 'post' || in_array($type, $this->post_types)) ? 'post' : (($type == 'term' || in_array($type, $this->taxonomies)) ? 'term' : false); |
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// maybe_unserialize due to useless serialization in versions < 0.9 |
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return $type && ($meta = get_metadata($type, $id, '_translations', true)) ? maybe_unserialize($meta) : array(); |
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} |
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|
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// store the post language in the database |
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function set_post_language($post_id, $lang) { |
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wp_set_post_terms($post_id, $lang ? $this->get_language($lang)->slug : '', 'language' ); |
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} |
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|
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// returns the language of a post |
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function get_post_language($post_id) { |
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$lang = get_the_terms($post_id, 'language' ); |
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return ($lang) ? reset($lang) : false; // there's only one language per post : first element of the array returned |
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} |
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|
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// among the post and its translations, returns the id of the post which is in $lang |
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function get_post($post_id, $lang) { |
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$post_lang = $this->get_post_language($post_id); |
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if (!$lang || !$post_lang) |
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return false; |
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|
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$lang = $this->get_language($lang); |
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return $post_lang->term_id == $lang->term_id ? $post_id : $this->get_translation('post', $post_id, $lang); |
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} |
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|
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// store the term language in the database |
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function set_term_language($term_id, $lang) { |
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update_metadata('term', $term_id, '_language', $lang ? $this->get_language($lang)->term_id : 0); |
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} |
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|
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// remove the term language in the database |
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function delete_term_language($term_id) { |
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delete_metadata('term', $term_id, '_language'); |
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} |
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|
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// returns the language of a term |
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function get_term_language($value, $taxonomy = '') { |
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if (is_numeric($value)) |
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$term_id = $value; |
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|
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elseif (is_string($value) && $taxonomy) |
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$term_id = get_term_by('slug', $value , $taxonomy)->term_id; |
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|
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return empty($term_id) ? false : $this->get_language(get_metadata('term', $term_id, '_language', true)); |
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} |
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|
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// among the term and its translations, returns the id of the term which is in $lang |
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function get_term($term_id, $lang) { |
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$lg = $this->get_term_language($term_id); |
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if (!$lang || !$lg) |
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return false; |
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|
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$lang = $this->get_language($lang); |
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return $lg->term_id == $lang->term_id ? $term_id : $this->get_translation('term', $term_id, $lang); |
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} |
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|
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// adds language information to a link when using pretty permalinks |
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function add_language_to_link($url, $lang) { |
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if (empty($lang)) |
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return $url; |
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|
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global $wp_rewrite; |
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if ($this->using_permalinks) { |
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$base = $this->options['rewrite'] ? '' : 'language/'; |
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$slug = $this->options['default_lang'] == $lang->slug && $this->options['hide_default'] ? '' : $base.$lang->slug.'/'; |
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return esc_url(str_replace($this->home.'/'.$wp_rewrite->root, $this->home.'/'.$wp_rewrite->root.$slug, $url)); |
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} |
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|
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// special case for pages which do not accept adding the lang parameter |
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elseif ('_get_page_link' != current_filter()) |
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return esc_url(add_query_arg( 'lang', $lang->slug, $url )); |
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|
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return $url; |
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} |
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|
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// optionally rewrite posts, pages links to filter them by language |
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// rewrite post format (and optionally categories and post tags) archives links to filter them by language |
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function add_post_term_link_filters() { |
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if ($this->options['force_lang'] && $this->using_permalinks) { |
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foreach (array('post_link', '_get_page_link', 'post_type_link') as $filter) |
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add_filter($filter, array(&$this, 'post_link'), 10, 2); |
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} |
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|
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add_filter('term_link', array(&$this, 'term_link'), 10, 3); |
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} |
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|
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// modifies post & page links |
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function post_link($link, $post) { |
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if (isset($this->links[$link])) |
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return $this->links[$link]; |
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|
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if ('post_type_link' == current_filter() && !in_array($post->post_type, $this->post_types)) |
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return $this->links[$link] = $link; |
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|
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if ('_get_page_link' == current_filter()) // this filter uses the ID instead of the post object |
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$post = get_post($post); |
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|
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// /!\ when post_status in not "publish", WP does not use pretty permalinks |
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return $this->links[$link] = $post->post_status != 'publish' ? $link : $this->add_language_to_link($link, $this->get_post_language($post->ID)); |
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} |
| 254 |
|
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// modifies term link |
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function term_link($link, $term, $tax) { |
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if (isset($this->links[$link])) |
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return $this->links[$link]; |
| 259 |
|
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return $this->links[$link] = ($tax == 'post_format' || ($this->options['force_lang'] && $this->using_permalinks && in_array($tax, $this->taxonomies))) ? |
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$this->add_language_to_link($link, $this->get_term_language($term->term_id)) : $link; |
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} |
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|
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// returns the html link to the flag if exists |
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// $lang: object |
| 266 |
function get_flag($lang, $url_only = false) { |
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if (file_exists(POLYLANG_DIR.($file = '/flags/'.$lang->description.'.png'))) |
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$url = POLYLANG_URL.$file; |
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|
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// overwrite with custom flags |
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// never use custom flags on admin side |
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if (!$this->is_admin && ( file_exists(PLL_LOCAL_DIR.($file = '/'.$lang->description.'.png')) || file_exists(PLL_LOCAL_DIR.($file = '/'.$lang->description.'.jpg')) )) |
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$url = PLL_LOCAL_URL.$file; |
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|
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return apply_filters('pll_get_flag', empty($url) ? '' : |
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($url_only ? $url : |
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sprintf( |
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'<img src="%s" title="%s" alt="%s" />', |
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esc_url($url), |
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esc_attr(apply_filters('pll_flag_title', $lang->name, $lang->slug, $lang->description)), |
| 281 |
esc_attr($lang->name) |
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))); |
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} |
| 284 |
|
| 285 |
// get languages term_ids or term_taxonomy_ids for use in sql queries |
| 286 |
function _get_languages_for_sql($lang, $field) { |
| 287 |
global $wpdb; |
| 288 |
// the query is coming from Polylang and the $lang is an object |
| 289 |
if (is_object($lang)) |
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return $field == 'term_id' ? "'" . $lang->$field . "'" : $lang->$field; |
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|
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// the query is coming from outside with 'lang' parameter and $lang is a comma separated list of slugs (or an array of slugs) |
| 293 |
$languages = is_array($lang) ? $lang : explode(',', $lang); |
| 294 |
$languages = "'" . implode("','", array_map( 'sanitize_title_for_query', $languages)) . "'"; |
| 295 |
$languages = $wpdb->get_col(" |
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SELECT $wpdb->term_taxonomy.$field FROM $wpdb->term_taxonomy |
| 297 |
INNER JOIN $wpdb->terms USING (term_id) |
| 298 |
WHERE taxonomy = 'language' AND $wpdb->terms.slug IN ($languages) |
| 299 |
"); // get ids from slugs |
| 300 |
|
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if ($field == 'term_id') |
| 302 |
$languages = array_map(create_function('$v', 'return "\'" . $v . "\'";'), $languages); |
| 303 |
|
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return implode(',', $languages); |
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} |
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|
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// adds clauses to comments query - used in both frontend and admin |
| 308 |
function _comments_clauses($clauses, $lang) { |
| 309 |
global $wpdb; |
| 310 |
if (!empty($lang)) { |
| 311 |
// if this clause is not already added by WP |
| 312 |
if (!strpos($clauses['join'], '.ID')) |
| 313 |
$clauses['join'] .= " JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID"; |
| 314 |
|
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$clauses['join'] .= " INNER JOIN $wpdb->term_relationships AS pll_tr ON pll_tr.object_id = ID"; |
| 316 |
$clauses['where'] .= " AND pll_tr.term_taxonomy_id IN (" . $this->_get_languages_for_sql($lang, 'term_taxonomy_id') . ")"; |
| 317 |
} |
| 318 |
return $clauses; |
| 319 |
} |
| 320 |
|
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// adds terms clauses to get_terms - used in both frontend and admin |
| 322 |
function _terms_clauses($clauses, $lang) { |
| 323 |
global $wpdb; |
| 324 |
if (!empty($lang)) { |
| 325 |
$clauses['join'] .= " LEFT JOIN $wpdb->termmeta AS pll_tm ON t.term_id = pll_tm.term_id"; |
| 326 |
$clauses['where'] .= " AND pll_tm.meta_key = '_language' AND pll_tm.meta_value IN (" . $this->_get_languages_for_sql($lang, 'term_id') . ")"; |
| 327 |
} |
| 328 |
return $clauses; |
| 329 |
} |
| 330 |
|
| 331 |
// returns all page ids *not in* language defined by $lang_id |
| 332 |
function exclude_pages($lang_id) { |
| 333 |
return get_posts(array( |
| 334 |
'lang' => 0, // so this query is not filtered by our pre_get_post filter in core.php |
| 335 |
'numberposts' => -1, |
| 336 |
'nopaging' => true, |
| 337 |
'post_type' => array_intersect(get_post_types(array('hierarchical' => 1)), $this->post_types), |
| 338 |
'fields' => 'ids', |
| 339 |
'tax_query' => array(array( |
| 340 |
'taxonomy' => 'language', |
| 341 |
'terms' => $lang_id, |
| 342 |
'operator' => 'NOT IN' |
| 343 |
)) |
| 344 |
)); |
| 345 |
} |
| 346 |
|
| 347 |
// export a mo object in options |
| 348 |
function mo_export($mo, $lang) { |
| 349 |
$strings = array(); |
| 350 |
foreach ($mo->entries as $entry) |
| 351 |
$strings[] = array($entry->singular, $mo->translate($entry->singular)); |
| 352 |
update_option('polylang_mo'.$lang->term_id, $strings); |
| 353 |
} |
| 354 |
|
| 355 |
// import a mo object from options |
| 356 |
function mo_import($lang) { |
| 357 |
$mo = new MO(); |
| 358 |
if ($strings = get_option('polylang_mo'.$lang->term_id)) { |
| 359 |
foreach ($strings as $msg) |
| 360 |
$mo->add_entry($mo->make_entry($msg[0], $msg[1])); |
| 361 |
} |
| 362 |
return $mo; |
| 363 |
} |
| 364 |
|
| 365 |
// list the post metas to synchronize |
| 366 |
static function list_metas_to_sync() { |
| 367 |
return array( |
| 368 |
'taxonomies' => __('Taxonomies', 'polylang'), |
| 369 |
'post_meta' => __('Custom fields', 'polylang'), |
| 370 |
'comment_status' => __('Comment status', 'polylang'), |
| 371 |
'ping_status' => __('Ping status', 'polylang'), |
| 372 |
'sticky_posts' => __('Sticky posts', 'polylang'), |
| 373 |
'post_date' => __('Published date', 'polylang'), |
| 374 |
'post_format' => __('Post format', 'polylang'), |
| 375 |
'post_parent' => __('Page parent', 'polylang'), |
| 376 |
'_wp_page_template' => __('Page template', 'polylang'), |
| 377 |
'menu_order' => __('Page order', 'polylang'), |
| 378 |
'_thumbnail_id' => __('Featured image', 'polylang'), |
| 379 |
); |
| 380 |
} |
| 381 |
|
| 382 |
} //class Polylang_Base |
| 383 |
|
