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image.php
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<?php
// Image extension, https://github.com/annaesvensson/yellow-image
class YellowImage {
const VERSION = "0.9.3";
public $yellow; // access to API
// Handle initialisation
public function onLoad($yellow) {
$this->yellow = $yellow;
$this->yellow->system->setDefault("imageUploadWidthMax", "1280");
$this->yellow->system->setDefault("imageUploadHeightMax", "1280");
$this->yellow->system->setDefault("imageUploadJpegQuality", "80");
$this->yellow->system->setDefault("imageThumbnailJpegQuality", "80");
$this->yellow->system->setDefault("imageJpegExtension", "auto");
}
// Handle update
public function onUpdate($action) {
if ($action=="clean") {
$statusCode = 200;
$path = $this->yellow->lookup->findMediaDirectory("coreThumbnailLocation");
foreach ($this->yellow->toolbox->getDirectoryEntries($path, "/.*/", false, false) as $entry) {
if (!$this->yellow->toolbox->deleteFile($entry)) $statusCode = 500;
}
if ($statusCode==500) $this->yellow->toolbox->log("error", "Can't delete files in directory '$path'!");
}
}
// Handle page content element
public function onParseContentElement($page, $name, $text, $attributes, $type) {
$output = null;
if ($name=="image" && $type=="inline") {
list($name, $alt, $style, $width, $height) = $this->yellow->toolbox->getTextArguments($text);
if (!preg_match("/^\w+:/", $name)) {
if (is_string_empty($alt)) $alt = $this->yellow->language->getText("imageDefaultAlt");
if (is_string_empty($width)) $width = "100%";
if (is_string_empty($height)) $height = $width;
$path = $this->yellow->lookup->findMediaDirectory("coreImageLocation");
list($src, $width, $height) = $this->getImageInformation($path.$name, $width, $height);
} else {
if (is_string_empty($alt)) $alt = $this->yellow->language->getText("imageDefaultAlt");
$src = $this->yellow->lookup->normaliseUrl("", "", "", $name);
$width = $height = 0;
}
$output = "<img src=\"".htmlspecialchars($src)."\"";
if ($width && $height) $output .= " width=\"".htmlspecialchars($width)."\" height=\"".htmlspecialchars($height)."\"";
if (!is_string_empty($alt)) $output .= " alt=\"".htmlspecialchars($alt)."\" title=\"".htmlspecialchars($alt)."\"";
if (!is_string_empty($style)) $output .= " class=\"".htmlspecialchars($style)."\"";
$output .= " />";
}
return $output;
}
// Handle media file changes
public function onEditMediaFile($file, $action, $email) {
if ($action=="upload") {
$fileName = $file->get("fileNameTemp");
list($widthInput, $heightInput, $orientation, $type) =
$this->yellow->toolbox->detectImageInformation($fileName, $file->get("type"));
$widthMax = $this->yellow->system->get("imageUploadWidthMax");
$heightMax = $this->yellow->system->get("imageUploadHeightMax");
if ($type=="gif" || $type=="jpeg" || $type=="png") {
if ($widthInput>$widthMax || $heightInput>$heightMax) {
list($widthOutput, $heightOutput) = $this->getImageDimensionsFit($widthInput, $heightInput, $widthMax, $heightMax);
$image = $this->loadImage($fileName, $type);
$image = $this->resizeImage($image, $widthInput, $heightInput, $widthOutput, $heightOutput);
$image = $this->orientImage($image, $orientation);
if (!$this->saveImage($image, $fileName, $type, $this->yellow->system->get("imageUploadJpegQuality"))) {
$file->error(500, "Can't write file '$fileName'!");
}
} elseif ($orientation>1) {
$image = $this->loadImage($fileName, $type);
$image = $this->orientImage($image, $orientation);
if (!$this->saveImage($image, $fileName, $type, $this->yellow->system->get("imageUploadJpegQuality"))) {
$file->error(500, "Can't write file '$fileName'!");
}
}
}
if ($type=="jpeg") {
$file->fileName = dirname($file->fileName)."/".pathinfo($file->fileName, PATHINFO_FILENAME).$this->getImageExtension($file->fileName, $type);
$file->set("type", $this->yellow->toolbox->getFileType($file->fileName));
}
}
}
// Return image information, create thumbnail on demand
public function getImageInformation($fileName, $widthOutput, $heightOutput) {
$fileNameShort = substru($fileName, strlenu($this->yellow->lookup->findMediaDirectory("coreImageLocation")));
list($widthInput, $heightInput, $orientation, $type) = $this->yellow->toolbox->detectImageInformation($fileName);
$widthOutput = $this->convertValueAndUnit($widthOutput, $widthInput);
$heightOutput = $this->convertValueAndUnit($heightOutput, $heightInput);
if (($widthInput==$widthOutput && $heightInput==$heightOutput) || $type=="svg" || $type=="") {
$src = $this->yellow->system->get("coreServerBase").$this->yellow->system->get("coreImageLocation").$fileNameShort;
$width = $widthOutput;
$height = $heightOutput;
} else {
$pathThumb = $this->yellow->lookup->findMediaDirectory("coreThumbnailLocation");
$fileNameThumb = ltrim(str_replace(array("/", "\\", "."), "-", dirname($fileNameShort)."/".pathinfo($fileName, PATHINFO_FILENAME)), "-");
$fileNameThumb .= "-".$widthOutput."x".$heightOutput;
$fileNameThumb .= $this->getImageExtension($fileName, $type);
$fileNameOutput = $pathThumb.$fileNameThumb;
if ($this->isFileNotUpdated($fileName, $fileNameOutput)) {
$image = $this->loadImage($fileName, $type);
$image = $this->resizeImage($image, $widthInput, $heightInput, $widthOutput, $heightOutput);
$image = $this->orientImage($image, $orientation);
if (is_file($fileNameOutput)) $this->yellow->toolbox->deleteFile($fileNameOutput);
if (!$this->saveImage($image, $fileNameOutput, $type, $this->yellow->system->get("imageThumbnailJpegQuality")) ||
!$this->yellow->toolbox->modifyFile($fileNameOutput, $this->yellow->toolbox->getFileModified($fileName))) {
$this->yellow->page->error(500, "Can't write file '$fileNameOutput'!");
}
}
$src = $this->yellow->system->get("coreServerBase").$this->yellow->system->get("coreThumbnailLocation").$fileNameThumb;
list($width, $height) = $this->yellow->toolbox->detectImageInformation($fileNameOutput);
}
return array($src, $width, $height);
}
// Return image dimensions that fit, scale proportional
public function getImageDimensionsFit($widthInput, $heightInput, $widthMax, $heightMax) {
$widthOutput = $widthMax;
$heightOutput = $widthMax * ($heightInput / $widthInput);
if ($heightOutput>$heightMax) {
$widthOutput = $widthOutput * ($heightMax / $heightOutput);
$heightOutput = $heightOutput * ($heightMax / $heightOutput);
}
return array(intval($widthOutput), intval($heightOutput));
}
// Return image extension
public function getImageExtension($fileName, $type) {
$jpegExtension = $this->yellow->system->get("imageJpegExtension");
$fileExtension = ".".pathinfo($fileName, PATHINFO_EXTENSION);
if ($jpegExtension!="auto" && $type=="jpeg") $fileExtension = $jpegExtension;
return $fileExtension;
}
// Load image from file
public function loadImage($fileName, $type) {
$image = false;
switch ($type) {
case "gif": $image = @imagecreatefromgif($fileName); break;
case "jpeg": $image = @imagecreatefromjpeg($fileName); break;
case "png": $image = @imagecreatefrompng($fileName); break;
}
return $image;
}
// Save image to file
public function saveImage($image, $fileName, $type, $quality) {
$ok = false;
switch ($type) {
case "gif": $ok = @imagegif($image, $fileName); break;
case "jpeg": $ok = @imagejpeg($image, $fileName, $quality); break;
case "png": $ok = @imagepng($image, $fileName); break;
}
return $ok;
}
// Create image from scratch
public function createImage($width, $height) {
$image = imagecreatetruecolor($width, $height);
imagealphablending($image, false);
imagesavealpha($image, true);
return $image;
}
// Resize image
public function resizeImage($image, $widthInput, $heightInput, $widthOutput, $heightOutput) {
$widthFit = $widthInput * ($heightOutput / $heightInput);
$heightFit = $heightInput * ($widthOutput / $widthInput);
$widthDiff = abs($widthOutput - $widthFit);
$heightDiff = abs($heightOutput - $heightFit);
$imageOutput = $this->createImage($widthOutput, $heightOutput);
if ($heightFit>$heightOutput) {
imagecopyresampled($imageOutput, $image, 0, $heightDiff/-2, 0, 0, $widthOutput, $heightFit, $widthInput, $heightInput);
} else {
imagecopyresampled($imageOutput, $image, $widthDiff/-2, 0, 0, 0, $widthFit, $heightOutput, $widthInput, $heightInput);
}
return $imageOutput;
}
// Orient image automatically
public function orientImage($image, $orientation) {
switch ($orientation) {
case 2: imageflip($image, IMG_FLIP_HORIZONTAL); break;
case 3: $image = imagerotate($image, 180, 0); break;
case 4: imageflip($image, IMG_FLIP_VERTICAL); break;
case 5: $image = imagerotate($image, 90, 0); imageflip($image, IMG_FLIP_VERTICAL); break;
case 6: $image = imagerotate($image, -90, 0); break;
case 7: $image = imagerotate($image, 90, 0); imageflip($image, IMG_FLIP_HORIZONTAL); break;
case 8: $image = imagerotate($image, 90, 0); break;
}
return $image;
}
// Return value according to unit
public function convertValueAndUnit($text, $valueBase) {
$value = $unit = "";
if (preg_match("/([\d\.]+)(\S*)/", $text, $matches)) {
$value = $matches[1];
$unit = $matches[2];
if ($unit=="%") $value = $valueBase * $value / 100;
}
return intval($value);
}
// Check if file needs to be updated
public function isFileNotUpdated($fileNameInput, $fileNameOutput) {
return $this->yellow->toolbox->getFileModified($fileNameInput)!=$this->yellow->toolbox->getFileModified($fileNameOutput);
}
}