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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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var $strings; // strings to translate |
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|
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// returns the query variables of the referer |
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function get_referer_vars() { |
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$qvars = array(); |
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$referer = wp_get_referer(); |
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if ($referer) { |
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$urlparts = parse_url($referer); |
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if (isset($urlparts['query'])) { |
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parse_str($urlparts['query'], $qvars); |
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} |
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} |
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return $qvars; |
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} |
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|
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// returns the list of available languages |
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function get_languages_list($hide_empty = false) { |
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return get_terms('language', array('hide_empty'=>$hide_empty, 'orderby'=>'term_group' )); |
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} |
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|
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// retrieves the dropdown list of the languages |
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function dropdown_languages($args) { |
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$defaults = array('name' => 'lang_choice', 'class' => '', 'show_option_none' => false, 'show_option_all' => false, |
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'hide_empty' => false, 'value' => 'slug', 'selected' => ''); |
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extract(wp_parse_args($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 .= $show_option_none ? "<option value='0'></option>\n" : ''; |
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$out .= $show_option_all ? "<option value='0'>".__('All languages', 'polylang')."</option>\n" : ''; |
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foreach ($this->get_languages_list($hide_empty) 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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if (is_object($value)) |
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return $value; |
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if (is_numeric($value) || (int) $value) |
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return get_term((int) $value, 'language'); |
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elseif (is_string($value)) |
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return get_term_by('slug', $value , 'language'); // seems it is not cached in 3.2.1 |
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return null; |
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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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$tr = serialize(array_merge(array($lang->slug => $id), $translations)); |
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update_metadata($type, $id, '_translations', $tr); |
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|
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foreach($translations as $key=>$p) |
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update_metadata($type, (int) $p, '_translations', $tr); |
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} |
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} |
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|
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// deletes a translation of a post or term |
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function delete_translation($type, $id) { |
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$translations = unserialize(get_metadata($type, $id, '_translations', true)); |
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if (is_array($translations)) { |
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$slug = array_search($id, $translations); |
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unset($translations[$slug]); |
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$tr = serialize($translations); |
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foreach($translations as $key=>$p) |
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update_metadata($type, (int) $p, '_translations', $tr); |
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delete_metadata($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 = unserialize(get_metadata($type, $id, '_translations', true)); |
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$slug = $this->get_language($lang)->slug; |
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return isset($translations[$slug]) ? (int) $translations[$slug] : ''; |
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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, $this->get_language($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) : null; // 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, $lang) { |
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$lang = $this->get_language($lang); |
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return $this->get_post_language($post_id)->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', $this->get_language($lang)->term_id); |
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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)) : null; |
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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, $lang) { |
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$lang = $this->get_language($lang); |
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return $this->get_term_language($term_id)->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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// 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($lang->name).'" />' : ''; |
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} |
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|
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// adds terms clauses to get_terms - used in both frontend and admin |
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function _terms_clauses($clauses, $lang, $display_all = false) { |
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global $wpdb; |
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if (isset($lang) && !is_wp_error($lang)) { |
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$clauses['join'] .= $wpdb->prepare(" LEFT JOIN $wpdb->termmeta AS pll_tm ON t.term_id = pll_tm.term_id"); |
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$where_lang = $wpdb->prepare("pll_tm.meta_key = '_language' AND pll_tm.meta_value = %d", $lang->term_id); // add terms in the right language |
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$where_all = $wpdb->prepare("t.term_id NOT IN (SELECT term_id FROM $wpdb->termmeta WHERE meta_key IN ('_language'))"); // add terms with no language set |
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$clauses['where'] .= $display_all ? " AND (($where_lang) OR ($where_all))" : " AND $where_lang"; |
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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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$q = array( |
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'numberposts'=>-1, |
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'post_type' => 'page', |
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'fields' => 'ids', |
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'tax_query' => array(array( |
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'taxonomy'=>'language', |
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'fields' => 'id', |
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'terms'=>$lang_id, |
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'operator'=>'NOT IN' |
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)) |
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); |
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return get_posts($q); |
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} |
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|
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// register strings for translation |
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function register_string($name, $string) { |
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$this->strings[] = array('name'=> $name, 'string' => $string); |
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} |
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|
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} //class Polylang_Base |
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?> |
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|
