Add support for default prefix

README.md

@@ -28,11 +28,14 @@ $form->addComponent(new \Nella\Forms\Controls\PhoneNumberInput('Phone'), 'phone'
 \Nella\Forms\Controls\PhoneNumberInput::register();
 $form->addPhone('phone', 'Phone');
 
-// Optional phone numnber validation
+// Optional phone number validation
 $form['phone']
 	->addCondition(\Nette\Application\UI\Form::FILLED)
 		->addRule([$form['phone'], 'validatePhoneNumber'], 'Phone number is invalid');
-
+
+// Optional phone number default prefix
+$control = $form->addPhone('phone', 'Phone');
+$control->setDefaultPrefix('+420');
 ```
 
 Manual rendering

src/Nella/Forms/Controls/PhoneNumberInput.php

@@ -316,6 +316,9 @@ class PhoneNumberInput extends \Nette\Forms\Controls\BaseControl
 	/** @var string */
 	private $number;
 
+	/** @var string */
+	private $defaultPrefix;
+
 	/**
 	 * @param string
 	 * @return \Nella\Forms\Controls\PhoneNumberInput
@@ -364,6 +367,20 @@ public function getValue()
 		return $value;
 	}
 
+	/**
+	 * @param string
+	 * @return \Nella\Forms\Controls\PhoneNumberInput
+	 */
+	public function setDefaultPrefix($prefix)
+	{
+		if (!in_array($prefix, static::$phonePrefixes, TRUE) && !is_null($prefix)) {
+			throw new \Nette\InvalidArgumentException('This prefix is not supported');
+		}
+		$this->defaultPrefix = $prefix;
+
+		return $this;
+	}
+
 	/**
 	 * @return bool
 	 */
@@ -396,7 +413,7 @@ public function getControlPart($key)
 			$control = \Nette\Forms\Helpers::createSelectBox(
 				array_combine(static::$phonePrefixes, static::$phonePrefixes),
 				array(
-					'selected?' => $this->prefix,
+					'selected?' => $this->prefix === NULL ? $this->defaultPrefix : $this->prefix,
 				)
 			);
 			$control->name($name . '[' . static::NAME_PREFIX . ']')->id($this->getHtmlId());

tests/Nella/Forms/Controls/PhoneNumberInputTest.phpt

@@ -183,6 +183,35 @@ class PhoneNumberInputTest extends \Tester\TestCase
 		Assert::same($form, $control->getForm());
 	}
 
+	public function testDefaultPrefix()
+	{
+		$control = $this->createControl();
+
+		$dq = \Tester\DomQuery::fromHtml((string) $control->getControlPart('prefix'));
+		Assert::false($dq->has("select option[selected]"));
+
+		$control->setDefaultPrefix('+420');
+
+		$dq = \Tester\DomQuery::fromHtml((string) $control->getControlPart('prefix'));
+		Assert::true($dq->has("select option[selected]"));
+		Assert::true($dq->has("select option[value=+420][selected]"));
+
+		$control->setDefaultPrefix(NULL);
+
+		$dq = \Tester\DomQuery::fromHtml((string) $control->getControlPart('prefix'));
+		Assert::false($dq->has("select option[selected]"));
+	}
+
+	/**
+	 * @throws \Nette\InvalidArgumentException
+	 */
+	public function testDefaultPrefixInvalid()
+	{
+		$control = $this->createControl();
+
+		$control->setDefaultPrefix(FALSE);
+	}
+
 	private function createControl($data = array())
 	{
 		$_SERVER['REQUEST_METHOD'] = 'POST';