1 <?php
 2 /**
 3  * An extension to dropdown field, pre-configured to list languages.
 4  * The languages already used in the site will be on top.
 5  * @package forms
 6  * @subpackage fields-relational
 7  */
 8 class LanguageDropdownField extends GroupedDropdownField {
 9     
10     /**
11      * Create a new LanguageDropdownField
12      * @param string $name
13      * @param string $title
14      * @param array $excludeLocales List of locales that won't be included
15      * @param string $translatingClass Name of the class with translated instances where to look for used languages
16      * @param string $list Indicates the source language list. Can be either Common-English, Common-Native, Locale-English, Locale-Native
17      */
18     function __construct($name, $title, $excludeLocales = array(), $translatingClass = 'SiteTree', $list = 'Common-English', $instance = null) {
19         $usedLocalesWithTitle = Translatable::get_existing_content_languages($translatingClass);
20         $usedLocalesWithTitle = array_diff_key($usedLocalesWithTitle, $excludeLocales);
21 
22         if('Common-English' == $list) $allLocalesWithTitle = i18n::get_common_languages();
23         else if('Common-Native' == $list) $allLocalesWithTitle = i18n::get_common_languages(true);
24         else if('Locale-English' == $list) $allLocalesWithTitle = i18n::get_common_locales();
25         else if('Locale-Native' == $list) $allLocalesWithTitle = i18n::get_common_locales(true);
26         else $allLocalesWithTitle = i18n::get_locale_list();
27 
28         if(isset($allLocales[Translatable::default_locale()])) unset($allLocales[Translatable::default_locale()]);
29         
30         // Limit to allowed locales if defined
31         // Check for canTranslate() if an $instance is given
32         $allowedLocales = Translatable::get_allowed_locales();
33         foreach($allLocalesWithTitle as $locale => $localeTitle) {
34             if(
35                 ($allowedLocales && !in_array($locale, $allowedLocales))
36                 || ($excludeLocales && in_array($locale, $excludeLocales))
37                 || ($usedLocalesWithTitle && array_key_exists($locale, $usedLocalesWithTitle))
38             ) {
39                 unset($allLocalesWithTitle[$locale]);
40             }
41             
42             if($excludeLocales && in_array($locale, $excludeLocales)) {
43                 unset($usedLocalesWithTitle[$locale]);
44             }
45         }
46         // instance specific permissions
47         foreach($allLocalesWithTitle as $locale => $localeTitle) {
48             if($instance && !$instance->canTranslate(null, $locale)) {
49                 unset($allLocalesWithTitle[$locale]);
50             }
51         }
52         foreach($usedLocalesWithTitle as $locale => $localeTitle) {
53             if($instance && !$instance->canTranslate(null, $locale)) {
54                 unset($usedLocalesWithTitle[$locale]);
55             }
56         }
57 
58         // Sort by title (array value)
59         asort($allLocalesWithTitle);
60         
61         if(count($usedLocalesWithTitle)) {
62             asort($usedLocalesWithTitle);
63             $source = array(
64                 _t('Form.LANGAVAIL', "Available languages") => $usedLocalesWithTitle,
65                 _t('Form.LANGAOTHER', "Other languages") => $allLocalesWithTitle
66             );
67         } else {
68             $source = $allLocalesWithTitle;
69         }
70 
71         parent::__construct($name, $title, $source);
72     }
73 }
74 
75 ?>