vicens /
captcha
Complex classes like Captcha often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Captcha, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 7 | class Captcha |
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| 8 | { |
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| 9 | /** |
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| 10 | * 存储在session中的key |
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| 11 | */ |
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| 12 | const SESSION_NAME = '_captcha'; |
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| 13 | |||
| 14 | /** |
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| 15 | * 验证码配置 |
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| 16 | * @var array |
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| 17 | */ |
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| 18 | protected $config = [ |
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| 19 | /** |
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| 20 | * 调试模型 |
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| 21 | */ |
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| 22 | 'debug' => false, |
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| 23 | /** |
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| 24 | * 默认验证码长度 |
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| 25 | * @var int |
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| 26 | */ |
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| 27 | 'length' => 4, |
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| 28 | /** |
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| 29 | * 验证码字符集 |
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| 30 | * @var string |
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| 31 | */ |
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| 32 | 'charset' => 'abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ123456789', |
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| 33 | /** |
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| 34 | * 是否开启严格模式(区分大小写) |
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| 35 | * @var bool |
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| 36 | */ |
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| 37 | 'strict' => false, |
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| 38 | /** |
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| 39 | * 默认验证码宽度 |
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| 40 | * @var int |
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| 41 | */ |
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| 42 | 'width' => 150, |
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| 43 | /** |
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| 44 | * 默认验证码高度 |
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| 45 | * @var int |
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| 46 | */ |
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| 47 | 'height' => 40, |
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| 48 | /** |
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| 49 | * 指定文字颜色 |
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| 50 | * @var string |
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| 51 | */ |
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| 52 | 'textColor' => null, |
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| 53 | /** |
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| 54 | * 文字字体文件 |
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| 55 | * @var string |
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| 56 | */ |
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| 57 | 'textFont' => null, |
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| 58 | /** |
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| 59 | * 指定图片背景色 |
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| 60 | * @var string |
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| 61 | */ |
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| 62 | 'backgroundColor' => null, |
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| 63 | /** |
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| 64 | * 开启失真模式 |
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| 65 | * @var bool |
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| 66 | */ |
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| 67 | 'distortion' => true, |
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| 68 | /** |
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| 69 | * 最大前景线条数 |
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| 70 | * @var int |
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| 71 | */ |
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| 72 | 'maxFrontLines' => null, |
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| 73 | /** |
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| 74 | * 最大背景线条数 |
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| 75 | * @val int |
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| 76 | */ |
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| 77 | 'maxBehindLines' => null, |
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| 78 | /** |
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| 79 | * 文字最大角度 |
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| 80 | * @var int |
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| 81 | */ |
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| 82 | 'maxAngle' => 8, |
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| 83 | /** |
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| 84 | * 文字最大偏移量 |
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| 85 | * @var int |
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| 86 | */ |
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| 87 | 'maxOffset' => 5 |
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| 88 | ]; |
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| 89 | |||
| 90 | /** |
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| 91 | * Captcha constructor. |
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| 92 | * @param array $config |
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| 93 | */ |
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| 94 | public function __construct(array $config = []) |
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| 98 | |||
| 99 | /** |
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| 100 | * 设置验证码配置 |
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| 101 | * |
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| 102 | * @param array|string $config 配置数组或配置项key |
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| 103 | * @param mixed $value 配置项值 |
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| 104 | * @return $this |
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| 105 | */ |
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| 106 | public function setConfig($config, $value = null) |
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| 121 | |||
| 122 | /** |
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| 123 | * 获取配置 |
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| 124 | * |
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| 125 | * @param string|null $key 配置项key |
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| 126 | * @return string|number|array |
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| 127 | */ |
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| 128 | public function getConfig($key = null) |
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| 136 | |||
| 137 | /** |
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| 138 | * 生成验证码 |
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| 139 | * |
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| 140 | * @return Image |
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| 141 | */ |
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| 142 | public function make() |
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| 156 | |||
| 157 | /** |
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| 158 | * 仅测试正确性, 不删除验证码 |
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| 159 | * |
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| 160 | * @param string $input |
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| 161 | * @return bool |
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| 162 | */ |
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| 163 | public function test($input) |
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| 181 | |||
| 182 | /** |
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| 183 | * 检测正确性,并删除验证码 |
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| 184 | * |
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| 185 | * @param string $input |
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| 186 | * @return bool |
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| 187 | */ |
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| 188 | public function check($input) |
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| 195 | |||
| 196 | /** |
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| 197 | * 生成验证码 |
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| 198 | * |
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| 199 | * @return string |
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| 200 | */ |
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| 201 | protected function generate() |
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| 213 | |||
| 214 | /** |
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| 215 | * 创建验证码图片 |
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| 216 | * |
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| 217 | * @param string $code |
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| 218 | * @return resource |
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| 219 | */ |
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| 220 | protected function build($code) |
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| 279 | |||
| 280 | /** |
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| 281 | * 创建失真 |
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| 282 | * |
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| 283 | * @param resource $image |
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| 284 | * @param int $width |
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| 285 | * @param int $height |
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| 286 | * @param int $backgroundColor |
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| 287 | * @return resource |
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| 288 | */ |
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| 289 | protected function createDistortion($image, $width, $height, $backgroundColor) |
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| 326 | |||
| 327 | /** |
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| 328 | * 获取一个字体 |
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| 329 | * |
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| 330 | * @return string |
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| 331 | */ |
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| 332 | protected function getTextFont() |
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| 341 | |||
| 342 | /** |
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| 343 | * 写入验证码到图片中 |
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| 344 | * |
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| 345 | * @param resource $image |
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| 346 | * @param string $phrase |
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| 347 | * @param string $font |
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| 348 | * @return int |
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| 349 | */ |
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| 350 | protected function renderText($image, $phrase, $font) |
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| 384 | |||
| 385 | /** |
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| 386 | * 画线 |
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| 387 | * |
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| 388 | * @param resource $image |
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| 389 | * @param int $width |
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| 390 | * @param int $height |
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| 391 | * @param int|null $color |
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| 392 | */ |
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| 393 | protected function renderLine($image, $width, $height, $color = null) |
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| 413 | |||
| 414 | /** |
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| 415 | * 画线 |
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| 416 | * |
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| 417 | * @param resource $image |
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| 418 | * @param int $max |
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| 419 | * @param int|null $color |
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| 420 | */ |
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| 421 | protected function drawLines($image, $max, $color = null) |
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| 443 | |||
| 444 | /** |
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| 445 | * 获取颜色 |
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| 446 | * |
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| 447 | * @param resource $image |
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| 448 | * @param int $width |
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| 449 | * @param int $height |
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| 450 | * @param int $background |
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| 451 | * @return int |
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| 452 | */ |
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| 453 | protected function getColor($image, $width, $height, $background) |
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| 463 | |||
| 464 | /** |
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| 465 | * @param string $name |
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| 466 | * @param array $arguments |
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| 467 | * @return $this |
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| 468 | */ |
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| 469 | public function __call($name, $arguments) |
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| 477 | } |
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