silverstripe-framework/core/model/Translatable.php
Ingo Schommer 00619a02f9 API CHANGE Removed obsolete internal Translatable methods: hasOwnTranslatableFields(), allFieldsInTable()
ENHANCEMENT Removed $create flag in Translatable::getTranslation() and replaced with explit action createTranslation()
ENHANCEMENT Sorting return array of Translatable::getTranslatedLangs()
ENHANCEMENT Added a note about saving a page before creating a translation
MINOR Added phpdoc to Translatable

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@70072 467b73ca-7a2a-4603-9d3b-597d59a354a9
2009-01-13 04:34:27 +00:00

844 lines
26 KiB
PHP
Executable File

<?php
/**
* The Translatable decorator allows your DataObjects to have versions in different languages,
* defining which fields are can be translated.
*
* Common language names (e.g. 'en') are used in Translatable for
* database-entities. On the other hand, the file-based i18n-translations
* always have a "locale" (e.g. 'en_US').
*
* You can enable {Translatabe} for any DataObject-subclass:
* <example>
* static $extensions = array(
* "Translatable('MyTranslatableVarchar', 'OtherTranslatableText')"
* );
* </example>
*
* Caution: Does not apply any character-set conversion, it is assumed that all content
* is stored and represented in UTF-8 (Unicode). Please make sure your database and
* HTML-templates adjust to this.
*
* @author Bernat Foj Capell <bernat@silverstripe.com>
* @author Michael Gall <michael (at) wakeless (dot) net>
* @author Ingo Schommer <ingo (at) silverstripe (dot) com>
*
* @package sapphire
* @subpackage misc
*/
class Translatable extends DataObjectDecorator {
/**
* Indicates if the multilingual feature is enabled
*
* @var boolean
*/
protected static $enabled = false;
/**
* The 'default' language.
* @var string
*/
protected static $default_lang = 'en';
/**
* The language in which we are reading dataobjects.
* Usually stored in session, specific to the "site mode":
* either 'site' or 'cms'.
* @see Director::get_site_mode()
* @var string
*/
protected static $reading_lang = null;
/**
* Indicates if the start language has been determined using choose_site_lang
* @var boolean
*/
protected static $language_decided = false;
/**
* Indicates whether the 'Lang' transformation when modifying queries should be bypassed
* If it's true
*
* @var boolean
*/
protected static $bypass = false;
/**
* A cached list of existing tables
*
* @var mixed
*/
protected static $tableList = null;
/**
* Dataobject's original ID when we're creating a new language version of an object
*
* @var unknown_type
*/
protected static $creatingFromID;
/**
* An array of fields that can be translated.
* @var array
*/
protected $translatableFields;
/**
* A map of the field values of the original (untranslated) DataObject record
* @var array
*/
protected $original_values = null;
/**
* Overloaded getter for $Lang property.
* Not all pages in the database have their language property explicitly set,
* so we fall back to {@link Translatable::default_lang()}.
*/
function getLang() {
$record = $this->owner->toMap();
return (isset($record["Lang"])) ? $record["Lang"] : Translatable::default_lang();
}
/**
* Checks if a table given table exists in the db
*
* @param mixed $table Table name
* @return boolean Returns true if $table exists.
*/
static function table_exists($table) {
if (!self::$tableList) self::$tableList = DB::tableList();
return isset(self::$tableList[strtolower($table)]);
}
/**
* Choose the language the site is currently on.
* If $_GET['lang'] or $_COOKIE['lang'] is set, then it will use that language, and store it in the session.
* Otherwise it checks the session for a possible stored language, either from namespace to the site_mode
* ('site' or 'cms'), or for a 'global' language setting.
* The final option is the member preference.
*
* @uses Director::get_site_mode()
*
* @param $langsAvailable array A numerical array of languages which are valid choices (optional)
* @return string Selected language (also saved in $reading_lang).
*/
static function choose_site_lang($langsAvailable = array()) {
$siteMode = Director::get_site_mode(); // either 'cms' or 'site'
if(self::$reading_lang) {
self::$language_decided = true;
return self::$reading_lang;
}
if(
(isset($_GET['lang']) && !$langsAvailable)
|| (isset($_GET['lang']) && in_array($_GET['lang'], $langsAvailable))
) {
// get from GET parameter
self::set_reading_lang($_GET['lang']);
/*
} elseif(isset($_COOKIE['lang.' . $siteMode]) && $siteMode && (!isset($langsAvailable) || in_array($_COOKIE['lang.' . $siteMode], $langsAvailable))) {
// get from namespaced cookie
self::set_reading_lang($_COOKIE[$siteMode . '.lang']);
} elseif(isset($_COOKIE['lang']) && (!isset($langsAvailable) || in_array($_COOKIE['lang'], $langsAvailable))) {
// get from generic cookie
self::set_reading_lang($_COOKIE['lang']);
} else if(Session::get('lang.' . $siteMode) && (!isset($langsAvailable) || in_array(Session::get('lang.' . $siteMode), $langsAvailable))) {
// get from namespaced session ('cms' or 'site')
self::set_reading_lang(Session::get('lang.' . $siteMode));
} else if(Session::get('lang.global') && (!isset($langsAvailable) || in_array(Session::get('lang.global'), $langsAvailable))) {
// get from global session
self::set_reading_lang(Session::get('lang.global'));
} else {
get default lang stored in class
self::set_reading_lang(self::default_lang());
*/
}
self::$language_decided = true;
return self::$reading_lang;
}
/**
* Get the current reading language.
* This value has to be set before the schema is built with translatable enabled,
* any changes after this can cause unintended side-effects.
*
* @return string
*/
static function default_lang() {
return self::$default_lang;
}
/**
* Set default language.
*
* @param $lang String
*/
static function set_default_lang($lang) {
self::$default_lang = $lang;
}
/**
* Check whether the default and current reading language are the same.
* @return boolean Return true if both default and reading language are the same.
*/
static function is_default_lang() {
return (!self::current_lang() || self::$default_lang == self::current_lang());
}
/**
* Get the current reading language.
* @return string
*/
static function current_lang() {
if (!self::$language_decided) self::choose_site_lang();
return self::$reading_lang;
}
/**
* Set the reading language, either namespaced to 'site' (website content)
* or 'cms' (management backend).
*
* @param string $lang New reading language.
*/
static function set_reading_lang($lang) {
//Session::set('currentLang',$lang);
self::$reading_lang = $lang;
}
/**
* Get a singleton instance of a class in the given language.
* @param string $class The name of the class.
* @param string $lang The name of the language.
* @param string $filter A filter to be inserted into the WHERE clause.
* @param boolean $cache Use caching (default: false)
* @param string $orderby A sort expression to be inserted into the ORDER BY clause.
* @return DataObject
*/
static function get_one_by_lang($class, $lang, $filter = '', $cache = false, $orderby = "") {
$orig = Translatable::current_lang();
Translatable::set_reading_lang($lang);
$do = DataObject::get_one($class, $filter, $cache, $orderby);
Translatable::set_reading_lang($orig);
return $do;
}
/**
* Get all the instances of the given class translated to the given language
*
* @param string $class The name of the class
* @param string $lang The name of the language
* @param string $filter A filter to be inserted into the WHERE clause.
* @param string $sort A sort expression to be inserted into the ORDER BY clause.
* @param string $join A single join clause. This can be used for filtering, only 1 instance of each DataObject will be returned.
* @param string $limit A limit expression to be inserted into the LIMIT clause.
* @param string $containerClass The container class to return the results in.
* @param string $having A filter to be inserted into the HAVING clause.
* @return mixed The objects matching the conditions.
*/
static function get_by_lang($class, $lang, $filter = '', $sort = '', $join = "", $limit = "", $containerClass = "DataObjectSet", $having = "") {
$oldLang = self::current_lang();
self::set_reading_lang($lang);
$result = DataObject::get($class, $filter, $sort, $join, $limit, $containerClass, $having);
self::set_reading_lang($oldLang);
return $result;
}
/**
* Get a record in his original language version.
* @param string $class The name of the class.
* @param string $originalLangID The original record id.
* @return DataObject
*/
static function get_original($class, $originalLangID) {
$baseClass = $class;
while( ($p = get_parent_class($baseClass)) != "DataObject") $baseClass = $p;
return self::get_one_by_lang($class,self::default_lang(),"\"$baseClass\".\"ID\" = $originalLangID");
}
/**
* Gets all translations for this specific page.
* Doesn't include the original language code ({@link Translatable::default_lang()}).
*
* @return array Numeric array of all language codes, sorted alphabetically.
*/
function getTranslatedLangs() {
$langs = array();
$class = ClassInfo::baseDataClass($this->owner->class); //Base Class
if($this->owner->hasExtension("Versioned") && Versioned::current_stage() == "Live") {
$class = $class."_Live";
}
$id = $this->owner->ID;
if(is_numeric($id)) {
$query = new SQLQuery('distinct Lang',"$class","(\"$class\".\"OriginalID\" =$id)");
$langs = $query->execute()->column();
}
if($langs) {
$langCodes = array_values($langs);
sort($langCodes);
return $langCodes;
} else {
return array();
};
}
/**
* Get a list of languages in which a given element has been translated
*
* @param string $class Name of the class of the element
* @param int $id ID of the element
* @return array List of languages
*/
static function get_langs_by_id($class, $id) {
$do = DataObject::get_by_id($class, $id);
return ($do ? $do->getTranslatedLangs() : array());
}
/**
* Enables the multilingual feature
*
*/
static function enable() {
self::$enabled = true;
}
/**
* Disable the multilingual feature
*
*/
static function disable() {
self::$enabled = false;
}
/**
* Check whether multilingual support has been enabled
*
* @return boolean True if enabled
*/
static function is_enabled() {
return self::$enabled;
}
/**
* When creating, set the original ID value
*
* @param int $id
*/
static function creating_from($id) {
self::$creatingFromID = $id;
}
//-----------------------------------------------------------------------------------------------//
/**
* Construct a new Translatable object.
* @var array $translatableFields The different fields of the object that can be translated.
*/
function __construct($translatableFields) {
parent::__construct();
// @todo Disabled selection of translatable fields - we're setting all fields as translatable in setOwner()
/*
if(!is_array($translatableFields)) {
$translatableFields = func_get_args();
}
$this->translatableFields = $translatableFields;
*/
// workaround for extending a method on another decorator (Hierarchy):
// split the method into two calls, and overwrite the wrapper AllChildrenIncludingDeleted()
// Has to be executed even with Translatable disabled, as it overwrites the method with same name
// on Hierarchy class, and routes through to Hierarchy->doAllChildrenIncludingDeleted() instead.
$this->createMethod("AllChildrenIncludingDeleted",
"
\$context = (isset(\$args[0])) ? \$args[0] : null;
if(\$context && \$obj->getLang() == \$context->Lang && \$obj->isTranslation()) {
// if the language matches the context (e.g. CMSMain), and object is translated,
// then call method on original language instead
return \$obj->getOwner()->getOriginalPage()->doAllChildrenIncludingDeleted(\$context);
} else if(\$obj->getOwner()->hasExtension('Hierarchy') ) {
return \$obj->getOwner()->extInstance('Hierarchy')->doAllChildrenIncludingDeleted(\$context);
} else {
return null;
}"
);
}
function setOwner(Object $owner) {
parent::setOwner($owner);
// setting translatable fields by inspecting owner - this should really be done in the constructor
$this->translatableFields = array_keys($this->owner->inheritedDatabaseFields());
}
function extraStatics() {
if(!Translatable::is_enabled()) return;
if(get_class($this->owner) == ClassInfo::baseDataClass(get_class($this->owner))) {
return array(
"db" => array(
"Lang" => "Varchar(12)",
"OriginalID" => "Int"
),
"defaults" => array(
"Lang" => Translatable::default_lang()
)
);
} else {
return array();
}
}
function findOriginalIDs() {
if(!$this->isTranslation()) {
$query = new SQLQuery("ID",
ClassInfo::baseDataClass($this->owner->class),
array("OriginalID = ".$this->owner->ID)
);
$ret = $query->execute()->column();
} else {
return array();
}
}
function augmentSQL(SQLQuery &$query) {
if(!Translatable::is_enabled()) return;
$lang = Translatable::current_lang();
$baseTable = ClassInfo::baseDataClass($this->owner->class);
$where = $query->where;
if (
$lang
&& !$query->filtersOnID()
&& array_search($baseTable, array_keys($query->from)) !== false
&& !$this->isTranslation()
//&& !$query->filtersOnFK()
) {
$qry = "\"Lang\" = '$lang'";
if(Translatable::is_default_lang()) {
$qry .= " OR \"Lang\" = '' ";
$qry .= " OR \"Lang\" IS NULL ";
}
$query->where[] = $qry;
}
}
function augmentNumChildrenCountQuery(SQLQuery $query) {
if(!Translatable::is_enabled()) return;
if($this->isTranslation()) {
$query->where[0] = '"ParentID" = '.$this->getOriginalPage()->ID;
}
}
/**
* @var SiteTree $cache_originalPage Cached representation of the original page for this translation
* (if at all in translation mode)
*/
private $cache_originalPage = null;
function setOriginalPage($original) {
if($original instanceof DataObject) {
$this->owner->OriginalID = $original->ID;
} else {
$this->owner->OriginalID = $original;
}
}
function getOriginalPage() {
if($this->isTranslation()) {
if(!$this->cache_originalPage) {
$orig = Translatable::current_lang();
Translatable::set_reading_lang(Translatable::default_lang());
$this->cache_originalPage = DataObject::get_by_id($this->owner->class, $this->owner->OriginalID);
Translatable::set_reading_lang($orig);
}
return $this->cache_originalPage;
} else {
return $this->owner;
}
}
function isTranslation() {
if($this->getLang() && ($this->getLang() != Translatable::default_lang()) && $this->owner->exists()) {
return true;
} else {
return false;
}
}
/**
* Determine if a table needs Versioned support
* This is called at db/build time
*
* @param string $table Table name
* @return boolean
*/
function isVersionedTable($table) {
return false;
}
function contentcontrollerInit($controller) {
if(!Translatable::is_enabled()) return;
Translatable::choose_site_lang();
$controller->Lang = Translatable::current_lang();
}
function modelascontrollerInit($controller) {
if(!Translatable::is_enabled()) return;
//$this->contentcontrollerInit($controller);
}
function initgetEditForm($controller) {
if(!Translatable::is_enabled()) return;
$this->contentcontrollerInit($controller);
}
function augmentWrite(&$manipulation) {
if(!Translatable::is_enabled()) return;
if(!$this->isTranslation()) {
$ids = $this->findOriginalIDs();
if(!$ids || count($ids) == 0) return;
}
$newManip = array();
foreach($manipulation as $table => $manip) {
if(strpos($table, "_versions") !== false) continue;
/*
foreach($this->fieldBlackList as $blackField) {
if(isset($manip["fields"][$blackField])) {
if($this->isTranslation()) {
unset($manip["fields"][$blackField]);
} else {
if(!isset($newManip[$table])) {
$newManip[$table] = array("command" =>"update",
"where" => "ID in (".implode(",", $ids).")",
"fields" => array());
}
$newManip[$table]["fields"][$blackField] = $manip["fields"][$blackField];
}
}
}
*/
}
DB::manipulate($newManip);
}
//-----------------------------------------------------------------------------------------------//
function updateCMSFields(FieldSet &$fields) {
if(!Translatable::is_enabled()) return;
// used in CMSMain->init() to set language state when reading/writing record
$fields->push(new HiddenField("Lang", "Lang", $this->getLang()) );
$fields->push(new HiddenField("OriginalID", "OriginalID", $this->owner->OriginalID) );
// if a language other than default language is used, we're in "translation mode",
// hence have to modify the original fields
$creating = false;
$baseClass = $this->owner->class;
$allFields = $fields->toArray();
while( ($p = get_parent_class($baseClass)) != "DataObject") $baseClass = $p;
$isTranslationMode = (Translatable::default_lang() != $this->getLang() && $this->getLang());
if($isTranslationMode) {
$originalLangID = Session::get($this->owner->ID . '_originalLangID');
$translatableFieldNames = $this->getTranslatableFields();
$allDataFields = $fields->dataFields();
$originalRecord = $this->owner->getOriginalPage();
$transformation = new Translatable_Transformation($originalRecord);
// iterate through sequential list of all datafields in fieldset
// (fields are object references, so we can replace them with the translatable CompositeField)
foreach($allDataFields as $dataField) {
if(in_array($dataField->Name(), $translatableFieldNames)) {
// if the field is translatable, perform transformation
$fields->replaceField($dataField->Name(), $transformation->transformFormField($dataField));
} else {
// else field shouldn't be editable in translation-mode, make readonly
$fields->replaceField($dataField->Name(), $dataField->performReadonlyTransformation());
}
}
} elseif($this->owner->isNew()) {
$fields->addFieldsToTab(
'Root',
new Tab(_t('Translatable.TRANSLATIONS', 'Translations'),
new LiteralField('SaveBeforeCreatingTranslationNote',
sprintf('<p class="message">%s</p>',
_t('Translatable.NOTICENEWPAGE', 'Please save this page before creating a translation')
)
)
)
);
} else {
// if we're not in "translation mode", show a dropdown to create a new translation.
// this action should just be possible when showing the default language,
// you can't create new translations from within a "translation mode" form.
$alreadyTranslatedLangs = $this->getTranslatedLangs();
$fields->addFieldsToTab(
'Root',
new Tab(_t('Translatable.TRANSLATIONS', 'Translations'),
new HeaderField('CreateTransHeader', _t('Translatable.CREATE', 'Create new translation'), 2),
$langDropdown = new LanguageDropdownField("NewTransLang", _t('Translatable.NEWLANGUAGE', 'New language'), $alreadyTranslatedLangs),
$createButton = new InlineFormAction('createtranslation',_t('Translatable.CREATEBUTTON', 'Create'))
)
);
if($alreadyTranslatedLangs) {
$fields->addFieldToTab(
'Root.Translations',
new HeaderField('ExistingTransHeader', _t('Translatable.EXISTING', 'Existing translations:'), 3)
);
$existingTransHTML = '<ul>';
foreach($alreadyTranslatedLangs as $i => $langCode) {
$existingTranslation = $this->owner->getTranslation($langCode);
$existingTransHTML .= sprintf('<li><a href="%s">%s</a></li>',
sprintf('admin/show/%d/?lang=%s', $existingTranslation->ID, $langCode),
i18n::get_language_name($langCode)
);
}
$existingTransHTML .= '</ul>';
$fields->addFieldToTab(
'Root.Translations',
new LiteralField('existingtrans',$existingTransHTML)
);
}
$langDropdown->addExtraClass('languageDropdown');
$createButton->addExtraClass('createTranslationButton');
// disable creation of new pages via javascript
$createButton->includeDefaultJS(false);
}
}
/**
* Get a list of fields from the tables created by this extension
*
* @param string $table Name of the table
* @return array Map where the keys are db, indexes and the values are the table fields
*/
function fieldsInExtraTables($table){
return array('db'=>null,'indexes'=>null);
}
/**
* Get the names of all translatable fields on this class
* as a numeric array.
* @todo Integrate with blacklist once branches/translatable is merged back.
*
* @return array
*/
function getTranslatableFields() {
return $this->translatableFields;
}
/**
* Return the base table - the class that directly extends DataObject.
* @return string
*/
function baseTable($stage = null) {
$tableClasses = ClassInfo::dataClassesFor($this->owner->class);
$baseClass = array_shift($tableClasses);
return (!$stage || $stage == $this->defaultStage) ? $baseClass : $baseClass . "_$stage";
}
function extendWithSuffix($table) {
return $table;
}
/**
* Gets an existing translation based on the language code.
* Use {@link hasTranslation()} as a quicker alternative to check
* for an existing translation without getting the actual object.
*
* @param String $lang
* @return DataObject Translated object
*/
function getTranslation($lang) {
if($this->owner->exists() && !$this->owner->isTranslation()) {
$orig = Translatable::current_lang();
$this->owner->flushCache();
Translatable::set_reading_lang($lang);
$filter = array("`OriginalID` = '".$this->owner->ID."'");
if($this->owner->hasExtension("Versioned") && Versioned::current_stage()) {
$translation = Versioned::get_one_by_stage($this->owner->class, Versioned::current_stage(), $filter);
} else {
$translation = DataObject::get_one($this->owner->class, $filter);
}
Translatable::set_reading_lang($orig);
return $translation;
}
}
/**
* Creates a new translation for the owner object of this decorator.
* Checks {@link getTranslation()} to return an existing translation
* instead of creating a duplicate. Writes the record to the database before
* returning it.
*
* @param string $lang
* @return DataObject The translated object
*/
function createTranslation($lang) {
$existingTranslation = $this->getTranslation($lang);
if($existingTranslation) return $existingTranslation;
$class = $this->owner->class;
$newTranslation = new $class;
$newTranslation->update($this->owner->toMap());
$newTranslation->ID = 0;
$newTranslation->setOriginalPage($this->owner->ID);
$newTranslation->Lang = $lang;
$newTranslation->write();
return $newTranslation;
}
/**
* Returns TRUE if the current record has a translation in this language.
* Use {@link getTranslation()} to get the actual translated record from
* the database.
*
* @return boolean
*/
function hasTranslation($lang) {
return ($this->owner->exists()) && (array_search($lang, $this->getTranslatedLangs()) !== false);
}
function augmentStageChildren(DataObjectSet $children, $showall = false) {
if(!Translatable::is_enabled()) return;
if($this->isTranslation()) {
$children->merge($this->getOriginalPage()->stageChildren($showall));
}
}
function augmentAllChildrenIncludingDeleted(DataObjectSet $children, $context = null) {
if(!Translatable::is_enabled()) return false;
$find = array();
$replace = array();
// @todo check usage of $context
if($context && $context->Lang /*&& $this->owner->Lang != $context->Lang */&& $context->Lang != Translatable::default_lang()) {
if($children) {
foreach($children as $child) {
if($child->hasTranslation($context->Lang)) {
$trans = $child->getTranslation($context->Lang);
$find[] = $child;
$replace[] = $trans;
}
}
foreach($find as $i => $found) {
$children->replace($found, $replace[$i]);
}
}
}
}
/**
* Get a list of languages with at least one element translated in (including the default language)
*
* @param string $className Look for languages in elements of this class
* @return array Map of languages in the form langCode => langName
*/
static function get_existing_content_languages($className = 'SiteTree', $where = '') {
if(!Translatable::is_enabled()) return false;
$baseTable = ClassInfo::baseDataClass($className);
$query = new SQLQuery('Distinct Lang',$baseTable,$where,"",'Lang');
$dbLangs = $query->execute()->column();
$langlist = array_merge((array)Translatable::default_lang(), (array)$dbLangs);
$returnMap = array();
$allCodes = array_merge(i18n::$all_locales, i18n::$common_languages);
foreach ($langlist as $langCode) {
if($langCode)
$returnMap[$langCode] = (is_array($allCodes[$langCode]) ? $allCodes[$langCode][0] : $allCodes[$langCode]);
}
return $returnMap;
}
}
/**
* Transform a formfield to a "translatable" representation,
* consisting of the original formfield plus a readonly-version
* of the original value, wrapped in a CompositeField.
*
* @param DataObject $original Needs the original record as we populate the readonly formfield with the original value
*
* @package sapphire
* @subpackage misc
*/
class Translatable_Transformation extends FormTransformation {
/**
* @var DataObject
*/
private $original = null;
function __construct(DataObject $original) {
$this->original = $original;
parent::__construct();
}
/**
* Returns the original DataObject attached to the Transformation
*
* @return DataObject
*/
function getOriginal() {
return $this->original;
}
/**
* @todo transformTextareaField() not used at the moment
*/
function transformTextareaField(TextareaField $field) {
$nonEditableField = new ToggleField($fieldname,$field->Title(),'','+','-');
$nonEditableField->labelMore = '+';
$nonEditableField->labelLess = '-';
return $this->baseTransform($nonEditableField, $field);
return $nonEditableField;
}
function transformFormField(FormField $field) {
$newfield = $field->performReadOnlyTransformation();
return $this->baseTransform($newfield, $field);
}
protected function baseTransform($nonEditableField, $originalField) {
$fieldname = $originalField->Name();
$nonEditableField_holder = new CompositeField($nonEditableField);
$nonEditableField_holder->setName($fieldname.'_holder');
$nonEditableField_holder->addExtraClass('originallang_holder');
$nonEditableField->setValue($this->original->$fieldname);
$nonEditableField->setName($fieldname.'_original');
$nonEditableField->addExtraClass('originallang');
$nonEditableField->setTitle('Original '.$originalField->Title());
$nonEditableField_holder->insertBefore($originalField, $fieldname.'_original');
return $nonEditableField_holder;
}
}
?>