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EvaCloudImage.php
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<?php
/**
* EvaCloudImage
* light-weight url based image transformation php library
*
* @link https://github.com/AlloVince/EvaCloudImage
* @copyright Copyright (c) 2012 AlloVince (http://avnpc.com/)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @author AlloVince
*/
/** Debug functions */
function p($r, $usePr = false)
{
echo '<pre>' . var_dump($r, true) . '</pre>';
}
class EvaCloudImage
{
protected $relativePath;
protected $subPath;
protected $pathlevel;
protected $sourceImageName;
protected $targetImageName;
protected $uniqueTargetImageName;
protected $imageNameArgs = array();
protected $sourceImage;
protected $targetImage;
protected $url;
protected $options = array(
'engine' => 'GD', //or imageMagick
'libPath' => '',
'sourceRootPath' => '',
'thumbFileRootPath' => '',
'thumbUrlRootPath' => '',
'maxAllowWidth' => '',
'maxAllowHeight' => '',
'watermark' => array(
'enable' => false,
'enableWidth' => 500,
'enableHeight' => 400,
'position' => '',
'text' => 'watermark',
'font' => '',
'fontfile' => '',
),
'saveImage' => true,
'allowExpendResize' => false,
'fileSizeLimit' => 1048576, //1MB = 1 048 576 bytes
);
protected $argMapping = array(
'c' => 'crop',
'g' => 'gravity',
'h' => 'height',
'q' => 'quality',
'r' => 'rotate',
'w' => 'width',
'x' => 'x',
'y' => 'y',
);
protected $transferParameters = array(
'width' => null,
'height' => null,
'quality' => null,
'crop' => null,
'x' => null,
'y' => null,
'rotate' => null,
'gravity' => null,
);
protected $transferParametersMerged = false;
public static function url($url, array $nameArgs = array())
{
$evaCloudImage = new static($url);
//source image will reset imageNameArgs once
$evaCloudImage->getSourceImageName();
return $evaCloudImage->setImageNameArgs($nameArgs)->getUniqueUrl();
}
public function setImageNameArgs(array $imageNameArgs)
{
$this->imageNameArgs = $imageNameArgs;
return $this;
}
public function getImageNameArgs()
{
return $this->imageNameArgs;
}
public function setTransferParametersMerged($merged)
{
$this->transferParametersMerged = (boolean) $merged;
return $this;
}
public function setUrl($url)
{
$this->url = $url;
return $this;
}
public function getUrl()
{
return $this->url;
}
public function getUniqueUrl()
{
$url = $this->url;
$urlArray = explode('/', $url);
array_pop($urlArray);
array_push($urlArray, $this->getUniqueTargetImageName());
return implode('/', $urlArray);
}
public function getTransferParameters()
{
if(true === $this->transferParametersMerged){
return $this->transferParameters;
}
$params = $this->argsToParameters();
$this->transferParametersMerged = true;
return $this->transferParameters = array_merge($this->transferParameters, $params);
}
public function setTransferParameters(array $transferParameters)
{
$this->transferParameters = $transferParameters;
return $this;
}
protected function getCurrentUrl()
{
$pageURL = 'http';
if (isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == "on"){
$pageURL .= "s";
}
$pageURL .= "://";
if ($_SERVER["SERVER_PORT"] != "80"){
$pageURL .= $_SERVER["SERVER_NAME"] . ":" . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"];
}
else {
$pageURL .= $_SERVER["SERVER_NAME"] . $_SERVER["REQUEST_URI"];
}
return $pageURL;
}
protected function getRelativePath()
{
if($this->relativePath){
return $this->relativePath;
}
$options = $this->options;
if(!$options['thumbFileRootPath']){
throw new InvalidArgumentException('Thumb file path not set');
}
if(!$options['thumbUrlRootPath']){
throw new InvalidArgumentException('Thumb file url path not set');
}
//NOTE : realpath performance not good
$relativePath = str_replace(realpath($options['thumbUrlRootPath']), '', realpath($options['thumbFileRootPath']));
if($relativePath) {
$relativePath = trim($relativePath, '/\\');
}
return $this->relativePath = $relativePath;
}
protected function getSubPath($urlPath = null)
{
if(!empty($this->subPath)){
return $this->subPath;
}
if(!$urlPath){
$url = $this->url;
$url = parse_url($url);
$urlPath = $url['path'];
}
if(!$urlPath){
return $this->subPath = '';
}
$relativePath = '/' . str_replace('\\', '/', $this->getRelativePath());
$filePath = str_replace($relativePath, '', $urlPath);
$filePath = trim(str_replace('/', DIRECTORY_SEPARATOR, $filePath), DIRECTORY_SEPARATOR);
$pathArray = explode(DIRECTORY_SEPARATOR, $filePath);
//remove file extension
array_pop($pathArray);
$this->pathlevel = count($pathArray);
$filePath = implode(DIRECTORY_SEPARATOR, $pathArray);
return $this->subPath = $filePath;
}
public function getTargetImage()
{
if($this->targetImage){
return $this->targetImage;
}
$options = $this->options;
$subPath = $this->getSubPath();
//$fileName = $this->getTargetImageName();
$uniqueName = $this->getUniqueTargetImageName();
if( $options['thumbFilter']){
$subPath= $options['thumbFilter'].$subPath;
}
return $this->targetImage = $options['thumbFileRootPath'] . DIRECTORY_SEPARATOR . $subPath . DIRECTORY_SEPARATOR . $uniqueName;
}
/*
public function getTargetImageName($urlPath = null)
{
if($this->targetImageName){
return $this->targetImageName;
}
$url = $this->url;
$url = parse_url($url);
$urlPath = $url['path'];
$urlArray = explode('/', $urlPath);
$fileName = $urlArray[count($urlArray) - 1];
$fileNameArray = $fileName ? explode('.', $fileName) : array();
if(!$fileNameArray || !isset($fileNameArray[1]) || !$fileNameArray[0] || !$fileNameArray[1]){
throw new InvalidArgumentException('File name not correct');
}
return $this->targetImageName = $fileName;
}
*/
public function getUniqueTargetImageName()
{
if($this->uniqueTargetImageName){
return $this->uniqueTargetImageName;
}
$sourceImageName = $this->getSourceImageName();
$this->getUniqueParameters();
$argString = $this->parametersToString();
if(!$argString){
return $this->uniqueTargetImageName = $sourceImageName;
}
$nameArray = explode('.', $sourceImageName);
$nameExt = array_pop($nameArray);
$nameFinal = array_pop($nameArray);
$nameFinal .= ',' . $argString;
array_push($nameArray, $nameFinal, $nameExt);
$uniqueName = implode('.', $nameArray);
return $this->uniqueTargetImageName = $uniqueName;
}
public function getSourceImage()
{
if($this->sourceImage){
return $this->sourceImage;
}
$url = $this->url;
$options = $this->options;
if(!$options['sourceRootPath']) {
throw new InvalidArgumentException('Source file path not set');
}
$url = parse_url($url);
if(!$url || !$url['path']){
throw new InvalidArgumentException('Url not able to parse');
}
if( $options['sourceFilter']){
$url['path']= str_replace($options['sourceFilter'],"",$url['path']);
}
$sourceImageName = $this->getSourceImageName($url['path']);
$subPath = $this->getSubPath($url['path']);
return $this->sourceImage = $options['sourceRootPath'] . DIRECTORY_SEPARATOR . $subPath . DIRECTORY_SEPARATOR . $sourceImageName;
}
public function getSourceImageName($urlPath = null)
{
if($this->sourceImageName){
return $this->sourceImageName;
}
if(!$urlPath){
$url = $this->url;
$url = parse_url($url);
$urlPath = $url['path'];
}
$urlArray = explode('/', $urlPath);
$fileName = $urlArray[count($urlArray) - 1];
$fileNameArray = $fileName ? explode('.', $fileName) : array();
if(!$fileNameArray || count($fileNameArray) < 2){
throw new InvalidArgumentException('File name not correct');
}
$this->targetImageName = $fileName;
$fileExt = array_pop($fileNameArray);
//TODO : add ext check
$fileNameMain = implode('.', $fileNameArray);
$fileNameArray = explode(',', $fileNameMain);
if(!$fileExt || !$fileNameArray || !$fileNameArray[0]){
throw new InvalidArgumentException('File name not correct');
}
//remove empty elements
$fileNameArray = array_filter($fileNameArray);
$fileNameMain = array_shift($fileNameArray);
$this->imageNameArgs = $fileNameArray;
return $this->sourceImageName = $fileNameMain . '.' . $fileExt;
}
public function setSourceImageName($sourceImageName)
{
$this->sourceImageName = $sourceImageName;
return $this;
}
public function show()
{
$sourceImage = $this->getSourceImage();
$targetImage = $this->getTargetImage();
if(file_exists($targetImage)){
header("Content-type: image/jpeg");
echo file_get_contents($targetImage);
return;
}
if(false === file_exists($sourceImage)){
header('HTTP/1.1 404 Not Found');
throw new Exception(printf('Source image is not exist, image path %s', $sourceImage));
}
$url = $this->getUniqueUrl();
if($this->url != $url){
header("HTTP/1.1 301 Moved Permanently");
return header('Location:' . $url);
}
$options = $this->options;
if(!$options['libPath']){
throw new InvalidArgumentException('PHPThumb library path not set');
}
require_once $options['libPath'] . DIRECTORY_SEPARATOR . 'ThumbLib.inc.php';
$thumb = PhpThumbFactory::create($sourceImage);
$this->transferImage($thumb);
if(true === $this->options['saveImage']){
$this->prepareDirectoryStructure($targetImage, $this->pathlevel);
$thumb->save($targetImage)->show();
} else {
$thumb->show();
}
}
public function getUniqueParameters()
{
$params = $this->getTransferParameters();
$requireResize = true;
//TODO: how to know image real width & height in advance
if($params['width'] || $params['height']) {
$params['width'] = $params['width'] ? $params['width'] + 0 : null;
$params['height'] = $params['height'] ? $params['height'] + 0 : null;
if(is_int($params['width']) && is_int($params['height'])){
} elseif(is_int($params['width']) || is_int($params['height'])){
$params['width'] = !$params['width'] || is_float($params['width']) ? 0 : $params['width'];
$params['height'] = !$params['height'] || is_float($params['height']) ? 0 : $params['height'];
} else {
$percent = $params['width'];
$percent = !$percent || $percent > 0 && $percent < $params['height'] ? $params['height'] : $percent;
$params['width'] = $percent;
$params['height'] = null;
}
}
if($params['x'] || $params['y']) {
$params['x'] = $params['x'] ? $params['x'] + 0 : null;
$params['y'] = $params['y'] ? $params['y'] + 0 : null;
}
if($params['crop']){
$allowCrop = array('fill');
if(is_numeric($params['crop'])){
$params['crop'] = $params['crop'] + 0;
} else {
$params['crop'] = in_array($params['crop'], $allowCrop) ? $params['crop'] : null;
}
}
if(!$params['crop']){
$params['x'] = null;
$params['y'] = null;
}
//Fill mode must have a certain width & height
if($params['crop'] == 'fill' && (!is_int($params['width']) || !$params['width'] || !is_int($params['height']) || !$params['height'])){
$params['crop'] = null;
}
if($params['gravity']){
if(!$params['crop']){
$params['gravity'] = null;
}
$allowGravity = array('top', 'bottom', 'right', 'left');
if(is_numeric($params['gravity'])){
$params['gravity'] = $params['gravity'] + 0;
} else {
$params['gravity'] = in_array($params['gravity'], $allowGravity) ? $params['gravity'] : null;
}
}
if($params['gravity'] && $params['crop'] != 'fill' && in_array($params['gravity'], array('top', 'bottom', 'right', 'left'))){
$params['gravity'] = null;
}
/*
if($params['gravity'] == 'face'){
$params['x'] = null;
$params['y'] = null;
}
*/
if($params['rotate']){
$allowRotate = array('CW', 'CCW');
if(is_numeric($params['rotate'])){
$params['rotate'] = $params['rotate'] + 0;
} elseif(!in_array($params['rotate'], $allowRotate)) {
$params['rotate'] = null;
}
}
if($params['quality']){
if(is_numeric($params['quality'])){
$params['quality'] = $params['quality'] + 0;
} else {
$params['quality'] = null;
}
}
return $this->transferParameters = $params;
}
public function transferImage(GdThumb $thumb)
{
$params = $this->getTransferParameters();
if($params['crop'] && is_int($params['crop'])){
if($params['x'] || $params['y']){
$params['x'] = $params['x'] ? $params['x'] : 0;
$params['y'] = $params['y'] ? $params['y'] : 0;
if(is_int($params['gravity'])){
$thumb->crop($params['x'], $params['y'], $params['crop'], $params['gravity']);
} else {
$thumb->crop($params['x'], $params['y'], $params['crop'], $params['crop']);
}
} else {
if(is_int($params['gravity'])){
$thumb->cropFromCenter($params['crop'], $params['gravity']);
} else {
if($params['gravity'] == 'face') {
$this->faceDetect($thumb);
}
$thumb->cropFromCenter($params['crop']);
}
}
} else if($params['crop'] && is_string($params['crop'])){
if($params['crop'] == 'fill'){
$gravityMap = array(
'top' => 'T',
'left' => 'L',
'right' => 'R',
'bottom' => 'B',
);
if($params['gravity']) {
$thumb->adaptiveResizeQuadrant ($params['width'], $params['height'], $gravityMap[$params['gravity']]);
} else {
$thumb->adaptiveResize($params['width'], $params['height']);
}
}
}
if( (!$params['crop'] || is_int($params['crop']) ) && ($params['width'] || $params['height'])) {
if(is_int($params['width']) || is_int($params['height'])){
$params['width'] = $params['width'] ? $params['width'] : 0;
$params['height'] = $params['height'] ? $params['height'] : 0;
$thumb->resize($params['width'], $params['height']);
} else {
$percent = $params['width'];
$percent = $percent * 100;
$thumb->resizePercent($percent);
}
}
if($params['rotate']){
if(is_int($params['rotate'])){
$thumb->rotateImageNDegrees($params['rotate']);
} else {
$thumb->rotateImage($params['rotate']);
}
}
if($params['quality']){
$thumb->setOptions(array(
'jpegQuality' => $params['quality']
));
}
return $thumb;
}
public function getFaceDetectClass()
{
}
protected function faceDetect(GdThumb $thumb)
{
}
public function __construct($url = null, array $options = array())
{
$url = $url ? $url : $this->getCurrentUrl();
$this->url = $url;
$options = array_merge($this->options, $options);
$this->options = $options;
}
protected function argsToParameters()
{
$args = $this->imageNameArgs;
$argMapping = $this->argMapping;
$params = array();
foreach($args as $arg){
if(!$arg){
continue;
}
if(strpos($arg, '_') !== 1){
continue;
}
$argKey = $arg{0};
if(isset($argMapping[$argKey])){
if($arg = substr($arg, 2)){
$params[$argMapping[$argKey]] = $arg;
}
}
}
return $params;
}
protected function parametersToString(array $params = array())
{
$params = $params ? $params : $this->getTransferParameters();
$argMapping = array_flip($this->argMapping);
$args = array();
foreach($params as $key => $param){
if(!$param){
continue;
}
if(isset($argMapping[$key])){
$args[$key] = $argMapping[$key] . '_' . $param;
}
}
ksort($args);
return implode(',', $args);
}
/**
* Prepares a directory structure for the given file(spec)
* using the configured directory level.
* this method is from https://github.com/zendframework/zf2/blob/master/library/Zend/Cache/Storage/Adapter/Filesystem.php
*
* @param string $file
* @return void
*/
protected function prepareDirectoryStructure($file, $level = '')
{
if (!$level) {
return;
}
// Directory structure already exists
$pathname = dirname($file);
if (file_exists($pathname)) {
return;
}
$perm = 0700;
$umask = false;
if ($umask !== false && $perm !== false) {
$perm = $perm & ~$umask;
}
if ($perm === false || $level == 1) {
// build-in mkdir function is enough
$umask = ($umask !== false) ? umask($umask) : false;
$res = mkdir($pathname, ($perm !== false) ? $perm : 0777, true);
if ($umask !== false) {
umask($umask);
}
if (!$res) {
$oct = ($perm === false) ? '777' : decoct($perm);
throw new Exception(
"mkdir('{$pathname}', 0{$oct}, true) failed", 0, $err
);
}
if ($perm !== false && !chmod($pathname, $perm)) {
$oct = decoct($perm);
throw new Exception(
"chmod('{$pathname}', 0{$oct}) failed", 0, $err
);
}
} else {
// build-in mkdir function sets permission together with current umask
// which doesn't work well on multo threaded webservers
// -> create directories one by one and set permissions
// find existing path and missing path parts
$parts = array();
$path = $pathname;
while (!file_exists($path)) {
array_unshift($parts, basename($path));
$nextPath = dirname($path);
if ($nextPath === $path) {
break;
}
$path = $nextPath;
}
// make all missing path parts
foreach ($parts as $part) {
$path.= DIRECTORY_SEPARATOR . $part;
// create a single directory, set and reset umask immediatly
$umask = ($umask !== false) ? umask($umask) : false;
$res = mkdir($path, ($perm === false) ? 0777 : $perm, false);
if ($umask !== false) {
umask($umask);
}
if (!$res) {
$oct = ($perm === false) ? '777' : decoct($perm);
throw new Exception(
"mkdir('{$path}', 0{$oct}, false) failed"
);
}
if ($perm !== false && !chmod($path, $perm)) {
$oct = decoct($perm);
throw new Exception(
"chmod('{$path}', 0{$oct}) failed"
);
}
}
}
}
}