1: <?php
 2: /*
 3:  * Copyright (c) 2015 @trashtoy
 4:  * https://github.com/trashtoy/
 5:  * 
 6:  * Permission is hereby granted, free of charge, to any person obtaining a copy of
 7:  * this software and associated documentation files (the "Software"), to deal in
 8:  * the Software without restriction, including without limitation the rights to use,
 9:  * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
10:  * Software, and to permit persons to whom the Software is furnished to do so,
11:  * subject to the following conditions:
12:  * 
13:  * The above copyright notice and this permission notice shall be included in all
14:  * copies or substantial portions of the Software.
15:  * 
16:  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17:  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
18:  * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
19:  * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
20:  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
21:  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22:  */
23: /**
24:  * PHP class file.
25:  * @auhtor trashtoy
26:  * @since  2.1.1
27:  */
28: namespace Peach\DT;
29: 
30: /**
31:  * 指定された Clock を基準にして, 任意の秒数だけ未来または過去に移動させた現在日時を返す Clock の実装です.
32:  */
33: class OffsetClock extends Clock
34: {
35:     /**
36:      * ベースとなる Clock です.
37:      * @var Clock
38:      */
39:     private $base;
40:     
41:     /**
42:      * 移動させる秒数です. 負の値を指定した場合は過去, 正の値を指定した場合は未来の方向に移動します.
43:      * @var int
44:      */
45:     private $offset;
46:     
47:     /**
48:      * 現在時刻を指定された秒数だけ未来または過去にずらす OffsetClock オブジェクトを生成します.
49:      * 
50:      * @param int   $offset 秒数
51:      * @param Clock $base   ベースとなる Clock オブジェクト. 未指定の場合は DefaultClock が適用される.
52:      */
53:     public function __construct($offset, Clock $base = null)
54:     {
55:         if ($base === null) {
56:             $base = DefaultClock::getInstance();
57:         }
58:         $this->offset = $offset;
59:         $this->base   = $base;
60:     }
61:     
62:     /**
63:      * ベースとなる Clock オブジェクトの getUnixTime() の結果を指定された秒数だけ加減した結果を返します.
64:      * 
65:      * @return int unix time
66:      */
67:     protected function getUnixTime()
68:     {
69:         return $this->base->getUnixTime() + $this->offset;
70:     }
71: }
72: