1: <?php
 2: /**
 3:  * Wei Framework
 4:  *
 5:  * @copyright   Copyright (c) 2008-2013 Twin Huang
 6:  * @license     http://opensource.org/licenses/mit-license.php MIT License
 7:  */
 8: 
 9: namespace Wei\Validator;
10: 
11: /**
12:  * Check if the input is starts with specified string
13:  *
14:  * @author      Twin Huang <twinhuang@qq.com>
15:  */
16: class StartsWith extends BaseValidator
17: {
18:     protected $notFoundMessage = '%name% must start with "%findMe%"';
19: 
20:     protected $negativeMessage = '%name% must not start with "%findMe%"';
21: 
22:     protected $findMe;
23: 
24:     protected $case = false;
25: 
26:     /**
27:      * {@inheritdoc}
28:      */
29:     public function __invoke($input, $findMe = null, $case = null)
30:     {
31:         $findMe && $this->storeOption('findMe', $findMe);
32:         is_bool($case) && $this->storeOption('case', $case);
33: 
34:         return $this->isValid($input);
35:     }
36: 
37:     /**
38:      * {@inheritdoc}
39:      */
40:     protected function doValidate($input)
41:     {
42:         if (!$this->isString($input)) {
43:             $this->addError('notString');
44:             return false;
45:         }
46: 
47:         if (is_scalar($this->findMe)) {
48:             $fn = $this->case ? 'strpos' : 'stripos';
49:             if (0 !== $fn($input, (string)$this->findMe)) {
50:                 $this->addError('notFound');
51:                 return false;
52:             }
53:         } elseif (is_array($this->findMe)) {
54:             $pattern = array();
55:             foreach ($this->findMe as $value) {
56:                 $pattern[] = preg_quote($value, '/');
57:             }
58:             $pattern = '/^' . implode('|', $pattern) . '/';
59:             $this->case || $pattern .= 'i';
60: 
61:             if (!preg_match($pattern, $input)) {
62:                 $this->addError('notFound');
63:                 return false;
64:             }
65:         }
66: 
67:         return true;
68:     }
69: }
70: