/**
* Crop an image file to a square thumbnail.
* The thumbnail will be saved with the suffix "<width>_thumb_square"
* @param File $basefile the file to crop.
* @param number $maxDimension limit maximum with/height.
* @return string the thumbnail's url or null if an error occured.
*/
public static function getSquareThumbnailUrlFromFile($basefile = null, $maxDimension = 1000)
{
if ($basefile === null) {
return;
}
$suffix = $maxDimension . '_thumb_square';
$originalFilename = $basefile->getStoredFilePath();
$previewFilename = $basefile->getStoredFilePath($suffix);
// already generated
if (is_file($previewFilename)) {
return $basefile->getUrl($suffix);
}
// Check file exists & has valid mime type
if ($basefile->getMimeBaseType() != "image" || !is_file($originalFilename)) {
return "";
}
$imageInfo = @getimagesize($originalFilename);
// check valid image dimesions
if (!isset($imageInfo[0]) || !isset($imageInfo[1])) {
return "";
}
// Check if image type is supported
if ($imageInfo[2] != IMAGETYPE_PNG && $imageInfo[2] != IMAGETYPE_JPEG && $imageInfo[2] != IMAGETYPE_GIF) {
return "";
}
$dim = min($imageInfo[0], $imageInfo[1], $maxDimension);
ImageConverter::Resize($originalFilename, $previewFilename, array('mode' => 'force', 'width' => $dim, 'height' => $dim));
return $basefile->getUrl($suffix);
}
