samayo /
bulletproof
Complex classes like Image 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 Image, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 17 | class Image implements \ArrayAccess |
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| 18 | {
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| 19 | /** |
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| 20 | * @var string The new image name, to be provided or will be generated. |
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| 21 | */ |
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| 22 | protected $name; |
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| 23 | |||
| 24 | /** |
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| 25 | * @var int The image width in pixels |
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| 26 | */ |
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| 27 | protected $width; |
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| 28 | |||
| 29 | /** |
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| 30 | * @var int The image height in pixels |
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| 31 | */ |
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| 32 | protected $height; |
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| 33 | |||
| 34 | /** |
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| 35 | * @var string The image mime type (extension) |
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| 36 | */ |
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| 37 | protected $mime; |
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| 38 | |||
| 39 | /** |
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| 40 | * @var string The full image path (dir + image + mime) |
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| 41 | */ |
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| 42 | protected $fullPath; |
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| 43 | |||
| 44 | /** |
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| 45 | * @var string The folder or image storage location |
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| 46 | */ |
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| 47 | protected $location; |
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| 48 | |||
| 49 | /** |
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| 50 | * @var array The min and max image size allowed for upload (in bytes) |
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| 51 | */ |
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| 52 | protected $size = array(100, 500000); |
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| 53 | |||
| 54 | /** |
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| 55 | * @var array The max height and width image allowed |
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| 56 | */ |
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| 57 | protected $dimensions = array(5000, 5000); |
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| 58 | |||
| 59 | /** |
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| 60 | * @var array The mime types allowed for upload |
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| 61 | */ |
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| 62 | protected $mimeTypes = array('jpeg', 'png', 'gif', 'jpg');
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| 63 | |||
| 64 | /** |
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| 65 | * @var array list of known image types |
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| 66 | */ |
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| 67 | protected $acceptedMimes = array( |
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| 68 | 1 => 'gif', 'jpeg', 'png', 'swf', 'psd', |
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| 69 | 'bmp', 'tiff', 'tiff', 'jpc', 'jp2', 'jpx', |
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| 70 | 'jb2', 'swc', 'iff', 'wbmp', 'xbm', 'ico' |
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| 71 | ); |
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| 72 | /** |
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| 73 | * @var array error messages strings |
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| 74 | */ |
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| 75 | protected $commonUploadErrors = array( |
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| 76 | UPLOAD_ERR_OK => '', |
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| 77 | UPLOAD_ERR_INI_SIZE => 'Image is larger than the specified amount set by the server', |
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| 78 | UPLOAD_ERR_FORM_SIZE => 'Image is larger than the specified amount specified by browser', |
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| 79 | UPLOAD_ERR_PARTIAL => 'Image could not be fully uploaded. Please try again later', |
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| 80 | UPLOAD_ERR_NO_FILE => 'Image is not found', |
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| 81 | UPLOAD_ERR_NO_TMP_DIR => 'Can\'t write to disk, due to server configuration ( No tmp dir found )', |
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| 82 | UPLOAD_ERR_CANT_WRITE => 'Failed to write file to disk. Please check you file permissions', |
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| 83 | UPLOAD_ERR_EXTENSION => 'A PHP extension has halted this file upload process' |
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| 84 | ); |
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| 85 | /** |
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| 86 | * @var array storage for the $_FILES global array |
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| 87 | */ |
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| 88 | private $_files = array(); |
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| 89 | /** |
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| 90 | * @var string storage for any errors |
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| 91 | */ |
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| 92 | private $error = ''; |
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| 93 | |||
| 94 | /** |
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| 95 | * @param array $_files represents the $_FILES array passed as dependency |
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| 96 | */ |
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| 97 | public function __construct(array $_files = array()) |
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| 98 | {
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| 99 | /* check if php_exif is enabled */ |
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| 100 | if (!function_exists('exif_imagetype')) {
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| 101 | $this->error = 'Function \'exif_imagetype\' Not found. Please enable \'php_exif\' in your PHP.ini'; |
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| 102 | } |
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| 103 | |||
| 104 | $this->_files = $_files; |
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| 105 | } |
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| 106 | |||
| 107 | /** |
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| 108 | * @param mixed $offset |
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| 109 | * @param mixed $value |
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| 110 | * @return null |
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| 111 | */ |
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| 112 | public function offsetSet($offset, $value){}
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| 113 | |||
| 114 | /** |
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| 115 | * @param mixed $offset |
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| 116 | * @return null |
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| 117 | */ |
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| 118 | public function offsetExists($offset){}
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| 119 | |||
| 120 | /** |
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| 121 | * @param mixed $offset |
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| 122 | * @return null |
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| 123 | */ |
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| 124 | public function offsetUnset($offset){}
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| 125 | |||
| 126 | /** |
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| 127 | * Gets array value \ArrayAccess |
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| 128 | * |
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| 129 | * @param mixed $offset |
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| 130 | * |
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| 131 | * @return string|boolean |
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| 132 | */ |
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| 133 | public function offsetGet($offset) |
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| 134 | {
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| 135 | // return error if requested |
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| 136 | if ($offset == 'error') {
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| 137 | return $this->error; |
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| 138 | } |
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| 139 | |||
| 140 | // return false if $image['key'] isn't found |
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| 141 | if (!isset($this->_files[$offset])) {
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| 142 | return false; |
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| 143 | } |
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| 144 | |||
| 145 | $this->_files = $this->_files[$offset]; |
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| 146 | |||
| 147 | // check for common upload errors |
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| 148 | if(isset($this->_files['error'])){
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| 149 | $this->error = $this->commonUploadErrors[$this->_files['error']]; |
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| 150 | } |
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| 151 | |||
| 152 | return true; |
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| 153 | } |
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| 154 | |||
| 155 | /** |
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| 156 | * Sets max image height and width limit |
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| 157 | * |
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| 158 | * @param $maxWidth int max width value |
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| 159 | * @param $maxHeight int max height value |
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| 160 | * |
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| 161 | * @return $this |
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| 162 | */ |
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| 163 | public function setDimension($maxWidth, $maxHeight) |
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| 164 | {
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| 165 | $this->dimensions = array($maxWidth, $maxHeight); |
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| 166 | return $this; |
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| 167 | } |
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| 168 | |||
| 169 | /** |
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| 170 | * Returns the full path of the image ex 'location/image.mime' |
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| 171 | * |
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| 172 | * @return string |
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| 173 | */ |
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| 174 | public function getFullPath() |
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| 175 | {
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| 176 | return $this->fullPath = $this->getLocation() . '/' . $this->getName() . '.' . $this->getMime(); |
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| 177 | } |
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| 178 | |||
| 179 | /** |
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| 180 | * Returns the image size in bytes |
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| 181 | * |
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| 182 | * @return int |
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| 183 | */ |
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| 184 | public function getSize() |
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| 185 | {
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| 186 | return (int) $this->_files['size']; |
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| 187 | } |
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| 188 | |||
| 189 | /** |
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| 190 | * Define a min and max image size for uploading |
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| 191 | * |
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| 192 | * @param $min int minimum value in bytes |
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| 193 | * @param $max int maximum value in bytes |
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| 194 | * |
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| 195 | * @return $this |
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| 196 | */ |
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| 197 | public function setSize($min, $max) |
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| 202 | |||
| 203 | /** |
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| 204 | * Returns a JSON format of the image width, height, name, mime ... |
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| 205 | * |
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| 206 | * @return string |
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| 207 | */ |
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| 208 | public function getJson() |
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| 209 | {
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| 210 | /* gather image info for json storage */ |
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| 223 | |||
| 224 | /** |
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| 225 | * Returns the image mime type |
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| 226 | * |
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| 227 | * @return null|string |
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| 228 | */ |
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| 229 | public function getMime() |
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| 236 | |||
| 237 | /** |
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| 238 | * Define a mime type for uploading |
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| 239 | * |
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| 240 | * @param array $fileTypes |
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| 241 | * |
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| 242 | * @return $this |
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| 243 | */ |
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| 244 | public function setMime(array $fileTypes) |
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| 249 | |||
| 250 | /** |
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| 251 | * Gets the real image mime type |
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| 252 | * |
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| 253 | * @param $tmp_name string The upload tmp directory |
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| 254 | * |
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| 255 | * @return null|string |
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| 256 | */ |
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| 257 | protected function getImageMime($tmp_name) |
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| 267 | |||
| 268 | /** |
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| 269 | * Returns error string or false if no errors occurred |
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| 270 | * |
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| 271 | * @return string|false |
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| 272 | */ |
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| 273 | public function getError() |
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| 277 | |||
| 278 | /** |
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| 279 | * Returns the image name |
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| 280 | * |
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| 281 | * @return string |
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| 282 | */ |
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| 283 | public function getName() |
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| 291 | |||
| 292 | /** |
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| 293 | * Provide image name if not provided |
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| 294 | * |
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| 295 | * @param null $isNameProvided |
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| 296 | * @return $this |
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| 297 | */ |
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| 298 | public function setName($isNameProvided = null) |
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| 306 | |||
| 307 | /** |
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| 308 | * Returns the image width |
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| 309 | * |
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| 310 | * @return int |
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| 311 | */ |
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| 312 | public function getWidth() |
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| 321 | |||
| 322 | /** |
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| 323 | * Returns the image height in pixels |
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| 324 | * |
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| 325 | * @return int |
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| 326 | */ |
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| 327 | public function getHeight() |
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| 336 | |||
| 337 | /** |
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| 338 | * Returns the storage / folder name |
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| 339 | * |
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| 340 | * @return string |
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| 341 | */ |
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| 342 | public function getLocation() |
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| 350 | |||
| 351 | /** |
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| 352 | * Validate directory/permission before creating a folder |
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| 353 | * |
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| 354 | * @param $dir string the folder name to check |
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| 355 | * |
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| 356 | * @return bool |
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| 357 | */ |
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| 358 | private function isDirectoryValid($dir) |
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| 362 | |||
| 363 | /** |
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| 364 | * Creates a location for upload storage |
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| 365 | * |
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| 366 | * @param $dir string the folder name to create |
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| 367 | * @param int $permission chmod permission |
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| 368 | * |
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| 369 | * @return $this |
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| 370 | */ |
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| 371 | public function setLocation($dir = 'bulletproof', $permission = 0666) |
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| 390 | |||
| 391 | /** |
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| 392 | * This methods validates and uploads the image |
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| 393 | * @return false|Image |
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| 394 | */ |
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| 395 | public function upload() |
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| 455 | |||
| 456 | |||
| 457 | /** |
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| 458 | * Final upload method to be called, isolated for testing purposes |
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| 459 | * |
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| 460 | * @param $tmp_name int the temporary location of the image file |
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| 461 | * @param $destination int upload destination |
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| 462 | * |
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| 463 | * @return bool |
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| 464 | */ |
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| 465 | public function moveUploadedFile($tmp_name, $destination) |
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| 469 | } |
