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<?php |
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namespace SilverCommerce\GeoZones\Forms; |
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use Locale; |
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use SilverStripe\i18n\i18n; |
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use SilverStripe\View\Requirements; |
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use SilverStripe\Forms\DropdownField; |
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use SilverCommerce\GeoZones\Model\Region; |
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/** |
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* Custom field that makes use of Ajax to change the list of possible regions you can select. |
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* |
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* This field needs to be linked with another field on the same form that will provide the |
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* selected country code. EG: |
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* |
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* $field = RegionSelectField::create("FieldName", "FieldTitle", "CountryFieldName"); |
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*/ |
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class RegionSelectionField extends DropdownField |
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{ |
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private static $allowed_actions = [ |
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"regionslist" |
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]; |
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private static $url_handlers = array( |
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'$Action!/$ID' => '$Action' |
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); |
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/** |
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* The name of the associated country field |
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* |
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* @var string |
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*/ |
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private $country_field; |
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/** |
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* Get the associated country field |
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*/ |
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public function getCountryField() |
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{ |
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return $this->country_field; |
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} |
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/** |
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* Set the associated country field |
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* |
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* @return self |
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*/ |
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public function setCountryField($country_field) |
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{ |
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$this->country_field = $country_field; |
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return $this; |
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} |
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/** |
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* Overwrite default get source to return |
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* custom list of regions |
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* |
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* @return array|ArrayAccess |
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*/ |
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public function getSource() |
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{ |
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$field = $this |
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->getForm() |
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->Fields() |
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->dataFieldByName($this->country_field); |
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if (empty($field) || empty($field->Value())) { |
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$locale = strtoupper(Locale::getRegion(i18n::get_locale())); |
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} else { |
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$locale = $field->Value(); |
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} |
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return $this |
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->getList($locale) |
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->map("Code", "Name") |
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->toArray(); |
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} |
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/** |
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* Custom constructor to allow us to define the associated country field |
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* |
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* @param string $name the name of this field |
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* @param string $title the title (label) of this field |
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* @param string $country_field The name of the country select field in this form |
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* @param string $value pass the value of this field |
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*/ |
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public function __construct($name, $title = null, $country_field = "Country", $value = null) |
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{ |
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// Force construction of parent |
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parent::__construct($name, $title, [], $value); |
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$this->country_field = $country_field; |
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} |
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/** |
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* Render the final field |
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*/ |
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public function Field($properties = []) |
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{ |
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Requirements::javascript("silvercommerce/geozones: client/dist/js/RegionSelectionField.min.js"); |
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$country_field = $this->country_field; |
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// Get source based on selected country (or current/default locale) |
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$field = $this |
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->getForm() |
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->Fields() |
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->dataFieldByName($country_field); |
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// Add reference to base field |
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$this |
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->setAttribute("data-region-field", true) |
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->setAttribute("data-country-field", $field->ID()) |
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->setAttribute("data-link", $this->Link("regionslist")); |
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if ($this->getHasEmptyDefault()) { |
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$this->setAttribute("data-empty-string", $this->getEmptyString()); |
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} |
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return parent::Field($properties); |
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} |
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/** |
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* Get a list of regions, filtered by the provided country code |
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* |
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* @return SSList |
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*/ |
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public function getList($country) |
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{ |
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return Region::get() |
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->filter("CountryCode", strtoupper($country)); |
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} |
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/** |
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* Return a list of regions based on the supplied country ID |
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* |
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* @return string |
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*/ |
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public function regionslist() |
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{ |
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$id = $this->getRequest()->param("ID"); |
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$data = $this->getList($id)->map("Code", "Name")->toArray(); |
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return json_encode($data); |
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} |
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} |
silvercommerce /
geozones
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