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+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category Zend
+ * @package Postman_Zend_Validate
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ * @version $Id$
+ */
+
+/**
+ * @see Postman_Zend_Validate_Abstract
+ */
+require_once 'Zend/Validate/Abstract.php';
+
+/**
+ * @category Zend
+ * @package Postman_Zend_Validate
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license http://framework.zend.com/license/new-bsd New BSD License
+ */
+class Postman_Zend_Validate_Alpha extends Postman_Zend_Validate_Abstract
+{
+ const INVALID = 'alphaInvalid';
+ const NOT_ALPHA = 'notAlpha';
+ const STRING_EMPTY = 'alphaStringEmpty';
+
+ /**
+ * Whether to allow white space characters; off by default
+ *
+ * @var boolean
+ * @deprecated
+ */
+ public $allowWhiteSpace;
+
+ /**
+ * Alphabetic filter used for validation
+ *
+ * @var Postman_Zend_Filter_Alpha
+ */
+ protected static $_filter = null;
+
+ /**
+ * Validation failure message template definitions
+ *
+ * @var array
+ */
+ protected $_messageTemplates = array(
+ self::INVALID => "Invalid type given. String expected",
+ self::NOT_ALPHA => "'%value%' contains non alphabetic characters",
+ self::STRING_EMPTY => "'%value%' is an empty string"
+ );
+
+ /**
+ * Sets default option values for this instance
+ *
+ * @param boolean|Postman_Zend_Config $allowWhiteSpace
+ */
+ public function __construct($allowWhiteSpace = false)
+ {
+ if ($allowWhiteSpace instanceof Postman_Zend_Config) {
+ $allowWhiteSpace = $allowWhiteSpace->toArray();
+ }
+
+ if (is_array($allowWhiteSpace)) {
+ if (array_key_exists('allowWhiteSpace', $allowWhiteSpace)) {
+ $allowWhiteSpace = $allowWhiteSpace['allowWhiteSpace'];
+ } else {
+ $allowWhiteSpace = false;
+ }
+ }
+
+ $this->allowWhiteSpace = (boolean) $allowWhiteSpace;
+ }
+
+ /**
+ * Returns the allowWhiteSpace option
+ *
+ * @return boolean
+ */
+ public function getAllowWhiteSpace()
+ {
+ return $this->allowWhiteSpace;
+ }
+
+ /**
+ * Sets the allowWhiteSpace option
+ *
+ * @param boolean $allowWhiteSpace
+ * @return Postman_Zend_Filter_Alpha Provides a fluent interface
+ */
+ public function setAllowWhiteSpace($allowWhiteSpace)
+ {
+ $this->allowWhiteSpace = (boolean) $allowWhiteSpace;
+ return $this;
+ }
+
+ /**
+ * Defined by Postman_Zend_Validate_Interface
+ *
+ * Returns true if and only if $value contains only alphabetic characters
+ *
+ * @param string $value
+ * @return boolean
+ */
+ public function isValid($value)
+ {
+ if (!is_string($value)) {
+ $this->_error(self::INVALID);
+ return false;
+ }
+
+ $this->_setValue($value);
+
+ if ('' === $value) {
+ $this->_error(self::STRING_EMPTY);
+ return false;
+ }
+
+ if (null === self::$_filter) {
+ /**
+ * @see Postman_Zend_Filter_Alpha
+ */
+ require_once 'Zend/Filter/Alpha.php';
+ self::$_filter = new Postman_Zend_Filter_Alpha();
+ }
+
+ self::$_filter->allowWhiteSpace = $this->allowWhiteSpace;
+
+ if ($value !== self::$_filter->filter($value)) {
+ $this->_error(self::NOT_ALPHA);
+ return false;
+ }
+
+ return true;
+ }
+
+}