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<?php |
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namespace LeKoala\CommonExtensions; |
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use SilverStripe\Control\Director; |
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use SilverStripe\ORM\DataObject; |
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use SilverStripe\Forms\FieldList; |
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use SilverStripe\ORM\DataExtension; |
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use SilverStripe\ORM\ValidationResult; |
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use SilverStripe\View\Parsers\URLSegmentFilter; |
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/** |
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* URL Segment extension |
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* |
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* By default link will be applied WITHOUT actions |
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* |
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* @property DataObject $owner |
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* @property string $URLSegment |
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*/ |
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class URLSegmentExtension extends DataExtension |
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{ |
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private static $db = [ |
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"URLSegment" => "Varchar(191)", |
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]; |
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private static $indexes = [ |
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"URLSegmentUnique" => [ |
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"type" => "unique", |
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"columns" => ["URLSegment"] |
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], |
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]; |
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/** |
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* Get a class by URLSegment |
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* |
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* @param string $class |
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* @param string $URLSegment |
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* @return DataObject |
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*/ |
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public static function getByURLSegment($class, $URLSegment) |
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{ |
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return $class::get()->filter('URLSegment', $URLSegment)->first(); |
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} |
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public function updateCMSFields(FieldList $fields) |
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{ |
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$URLSegment = $fields->dataFieldByName('URLSegment'); |
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if ($URLSegment) { |
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$URLSegment->setTitle(_t('URLSegmentExtension.URLSEGMENT', 'URL Segment')); |
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$Title = $fields->dataFieldByName('Title'); |
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if ($Title) { |
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$fields->insertAfter('Title', $URLSegment); |
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} |
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} |
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} |
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/** |
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* @return boolean |
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*/ |
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public function isSearchable() |
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{ |
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return $this->owner->hasMethod('Page'); |
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} |
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/** |
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* We have this link method by default that allows us to define |
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* a link for this record |
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* |
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* You can define your own methods in your DataObject class |
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* |
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* @param string $action |
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* @return string |
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*/ |
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public function Link($action = null) |
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{ |
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$url = $this->owner->Page()->Link($this->owner->URLSegment); |
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if ($action) { |
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$url .= "/$action"; |
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} |
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return $url; |
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} |
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/** |
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* @return string |
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*/ |
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public function AbsoluteLink() |
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{ |
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return Director::absoluteURL($this->Link()); |
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} |
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/** |
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* Cannot use the same url segment |
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* |
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* @param ValidationResult $validationResult |
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* @return void |
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*/ |
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public function validate(ValidationResult $validationResult) |
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{ |
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$duplicate = $this->getDuplicateRecord(); |
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if ($duplicate) { |
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$validationResult->addFieldError("URLSegment", "Segment already used by record #" . $duplicate->ID); |
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} |
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} |
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/** |
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* Find another record with the same url segment |
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* |
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* @param string $segment |
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* @return DataObject |
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*/ |
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public function getDuplicateRecord($segment = null) |
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{ |
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if ($segment === null) { |
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$segment = $this->owner->URLSegment; |
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} |
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if (!$segment) { |
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return false; |
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} |
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$class = get_class($this->owner); |
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return $class::get()->exclude('ID', $this->owner->ID)->filter("URLSegment", $segment)->first(); |
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} |
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/** |
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* This method allows you to customize url segment generation |
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* |
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* By default, URL segment is based on page title |
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* |
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* @return string |
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*/ |
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public function getBaseURLSegment() |
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{ |
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$segment = $this->owner->getTitle(); |
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if ($this->owner->hasMethod('updateURLSegment')) { |
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$this->owner->updateURLSegment($segment); |
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} |
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$filter = new URLSegmentFilter(); |
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$baseSegment = $filter->filter($segment); |
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if (is_numeric($baseSegment)) { |
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return false; |
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} |
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return $baseSegment; |
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} |
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/** |
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* Generate a new url segment and checks for duplicates |
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* |
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* @return string |
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*/ |
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public function generateURLSegment() |
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{ |
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$baseSegment = $segment = $this->getBaseURLSegment(); |
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if (!$baseSegment) { |
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return; |
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} |
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$duplicate = $this->getDuplicateRecord($segment); |
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$i = 0; |
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while ($duplicate) { |
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$i++; |
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$segment = $baseSegment . '-' . $i; |
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$duplicate = $this->getDuplicateRecord($segment); |
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} |
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return $segment; |
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} |
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public function onBeforeWrite() |
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{ |
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// Generate segment if no segment |
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if (!$this->owner->URLSegment && $this->getBaseURLSegment()) { |
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$this->owner->URLSegment = $this->generateURLSegment(); |
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} |
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} |
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} |
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lekoala /
silverstripe-common-extensions
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