1: <?php
 2: 
 3: namespace WebLoader\Filter;
 4: 
 5: /**
 6:  * Variables filter for WebLoader
 7:  *
 8:  * @author Jan Marek
 9:  * @license MIT
10:  */
11: class VariablesFilter
12: {
13: 
14:     /** @var string */
15:     private $startVariable = '{{$';
16: 
17:     /** @var string */
18:     private $endVariable = '}}';
19: 
20:     /** @var array */
21:     private $variables;
22: 
23:     /**
24:      * Construct
25:      * @param array $variables
26:      */
27:     public function __construct(array $variables = array())
28:     {
29:         foreach ($variables as $key => $value) {
30:             $this->$key = $value;
31:         }
32:     }
33: 
34:     /**
35:      * Set delimiter
36:      * @param string $start
37:      * @param string $end
38:      * @return VariablesFilter
39:      */
40:     public function setDelimiter($start, $end)
41:     {
42:         $this->startVariable = (string)$start;
43:         $this->endVariable = (string)$end;
44:         return $this;
45:     }
46: 
47:     /**
48:      * Invoke filter
49:      * @param string $code
50:      * @return string
51:      */
52:     public function __invoke($code)
53:     {
54:         $start = $this->startVariable;
55:         $end = $this->endVariable;
56: 
57:         $variables = array_map(function ($key) use ($start, $end) {
58:             return $start . $key . $end;
59:         }, array_keys($this->variables));
60: 
61:         $values = array_values($this->variables);
62: 
63:         return str_replace($variables, $values, $code);
64:     }
65: 
66:     /**
67:      * Magic set variable, do not call directly
68:      * @param string $name
69:      * @param string $value
70:      */
71:     public function __set($name, $value)
72:     {
73:         $this->variables[$name] = (string) $value;
74:     }
75: 
76:     /**
77:      * Magic get variable, do not call directly
78:      * @param string $name
79:      * @return string
80:      * @throws \WebLoader\InvalidArgumentException
81:      */
82:     public function & __get($name)
83:     {
84:         if (array_key_exists($name, $this->variables)) {
85:             return $this->variables[$name];
86:         } else {
87:             throw new \WebLoader\InvalidArgumentException("Variable '$name' is not set.");
88:         }
89:     }
90: 
91: }