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<?php |
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|
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// setups basic functions used for admin and frontend |
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abstract class Polylang_Base { |
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protected $options; |
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protected $home; |
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protected $strings = array(); // strings to translate |
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protected $post_types; // post types to filter by language |
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protected $taxonomies; // taxonomies to filter by language |
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|
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// used to cache results |
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private $languages_list = array(); |
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private $links = array(); |
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|
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function __construct() { |
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// init options often needed |
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$this->options = get_option('polylang'); |
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$this->home = get_option('home'); |
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|
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add_action('wp_loaded', array(&$this, 'add_post_types_taxonomies')); // must come late 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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$post_types = array_merge(PLL_MEDIA_SUPPORT ? array('attachment' => 'attachment') : array(), get_post_types(array('show_ui' => true))); |
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$this->post_types = apply_filters('pll_get_post_types', $post_types); |
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$this->taxonomies = apply_filters('pll_get_taxonomies', get_taxonomies(array('show_ui'=>true))); |
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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($args = array()) { |
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// although get_terms is cached, it is efficient to add our own cache |
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if (isset($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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$defaults = array('hide_empty' => false, 'orderby'=> 'term_group'); |
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$args = wp_parse_args($args, $defaults); |
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return $this->languages_list[$cache_key] = get_terms('language', $args); |
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} |
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|
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// retrieves the dropdown list of the languages |
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function dropdown_languages($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_option' => false, 'hide_empty' => false, 'value' => 'slug', 'selected' => ''); |
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extract(wp_parse_args($args, $defaults)); |
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|
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$out = sprintf('<select name="%1$s" id="%1$s"%2$s>'."\n", esc_attr($name), $class ? ' class="'.esc_attr($class).'"' : ''); |
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$out .= $add_option !== false ? "<option value='0'>$add_option</option>\n" : ''; |
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foreach ($this->get_languages_list($args) as $language) { |
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$out .= sprintf("<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 $out; |
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} |
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|
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// returns the language by its id or its slug |
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// Note: it seems that a numeric value is better for performance (3.2.1) |
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function get_language($value) { |
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$lang = is_object($value) ? $value : |
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((is_numeric($value) || (int) $value) ? get_term((int) $value, 'language') : |
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(is_string($value) ? get_term_by('slug', $value , 'language') : // seems it is not cached in 3.2.1 |
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false)); |
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return isset($lang) && $lang && !is_wp_error($lang) ? $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 $key=>$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, $id) { |
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// maybe_unserialize due to useless serialization in versions < 0.9 |
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return maybe_unserialize(get_metadata($type, $id, '_translations', true)); |
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} |
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|
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// store the post language in the database |
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function set_post_language($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 = $value; |
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elseif (is_string($value) && $taxonomy) |
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$term_id = get_term_by('slug', $value , $taxonomy)->term_id; |
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return $term_id ? $this->get_language(get_metadata('term', $term_id, '_language', true)) : false; |
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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, $lang) { |
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if (!isset($lang) || !$lang) |
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return $url; |
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|
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global $wp_rewrite; |
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if ($wp_rewrite->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 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'] && $GLOBALS['wp_rewrite']->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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return $this->links[$link] = ('post_type_link' == current_filter() && !in_array($post->post_type, $this->post_types)) ? |
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$link : $this->add_language_to_link($link, $this->get_post_language('_get_page_link' == current_filter() ? $post : $post->ID)); |
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} |
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|
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// modifies term link |
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function term_link($link, $term, $tax) { |
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if (isset($this->links[$link])) |
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return $this->links[$link]; |
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|
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$ok = $tax == 'post_format' || ($this->options['force_lang'] && $GLOBALS['wp_rewrite']->using_permalinks() && in_array($tax, $this->taxonomies)); |
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return $this->links[$link] = $ok ? $this->add_language_to_link($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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// $lang: object |
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function get_flag($lang) { |
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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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if (!is_admin() && ( // never use custom flags on admin side |
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file_exists(PLL_LOCAL_DIR.($file = '/'.$lang->description.'.png')) || |
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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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$title = apply_filters('pll_flag_title', $lang->name, $lang->slug, $lang->description); |
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return isset($url) ? '<img src="'.esc_url($url).'" title="'.esc_attr($title).'" alt="'.esc_attr($lang->name).'" />' : ''; |
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} |
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|
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// adds clauses to comments query - used in both frontend and admin |
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function _comments_clauses($clauses, $lang) { |
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global $wpdb; |
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|
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// if this clause is not already added by WP |
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if (!strpos($clauses['join'], '.ID')) |
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$clauses['join'] .= " JOIN $wpdb->posts ON $wpdb->posts.ID = $wpdb->comments.comment_post_ID"; |
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|
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$clauses['join'] .= " INNER JOIN $wpdb->term_relationships AS pll_tr ON pll_tr.object_id = ID"; |
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$clauses['where'] .= $wpdb->prepare(" AND pll_tr.term_taxonomy_id = %d", $lang->term_taxonomy_id); |
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|
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return $clauses; |
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} |
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|
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// adds terms clauses to get_terms - used in both frontend and admin |
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function _terms_clauses($clauses, $lang) { |
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global $wpdb; |
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if (isset($lang) && $lang) { |
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$clauses['join'] .= $wpdb->prepare(" LEFT JOIN $wpdb->termmeta AS pll_tm ON t.term_id = pll_tm.term_id"); |
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$clauses['where'] .= $wpdb->prepare(" AND pll_tm.meta_key = '_language' AND pll_tm.meta_value IN ($lang->term_id)"); |
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} |
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return $clauses; |
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} |
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|
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// returns all page ids *not in* language defined by $lang_id |
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function exclude_pages($lang_id) { |
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$q = array( |
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'numberposts' => -1, |
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'post_type' => array_intersect(get_post_types(array('hierarchical' => 1)), $this->post_types), |
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'fields' => 'ids', |
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'tax_query' => array(array( |
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'taxonomy' => 'language', |
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'fields' => 'id', |
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'terms' => $lang_id, |
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'operator' => 'NOT IN' |
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)) |
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); |
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return get_posts($q); |
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} |
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|
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// export a mo object in options |
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function mo_export($mo, $lang) { |
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$strings = array(); |
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foreach ($mo->entries as $entry) |
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$strings[] = array($entry->singular, $mo->translate($entry->singular)); |
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update_option('polylang_mo'.$lang->term_id, $strings); |
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} |
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|
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// import a mo object from options |
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function mo_import($lang) { |
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$mo = new MO(); |
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if ($strings = get_option('polylang_mo'.$lang->term_id)) { |
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foreach ($strings as $msg) |
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$mo->add_entry($mo->make_entry($msg[0], $msg[1])); |
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} |
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return $mo; |
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} |
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|
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} //class Polylang_Base |
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?> |
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|
