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<?php |
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/** |
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* Wraps the Image object. We have to replace a few more methods |
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* with Image because things like formatting and dimensions don't |
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* work the same with a placeholder file. |
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* |
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* @mixin CloudFileExtension |
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* |
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* @author Mark Guinn <[email protected]> |
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* @date 01.10.2014 |
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* @package cloudassets |
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* @subpackage wrappers |
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*/ |
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class CloudImage extends Image implements CloudAssetInterface |
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{ |
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private static $has_many = array( |
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'DerivedImages' => 'CloudImageCachedStore', |
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); |
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public function Link() |
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{ |
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$this->createLocalIfNeeded(); |
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return $this->CloudStatus == 'Live' ? $this->getCloudURL() : parent::Link(); |
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} |
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public function RelativeLink() |
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{ |
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$this->createLocalIfNeeded(); |
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return $this->CloudStatus == 'Live' ? $this->getCloudURL() : parent::RelativeLink(); |
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} |
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public function getURL() |
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{ |
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$this->createLocalIfNeeded(); |
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return $this->CloudStatus == 'Live' ? $this->getCloudURL() : parent::getURL(); |
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} |
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public function getAbsoluteURL() |
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{ |
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$this->createLocalIfNeeded(); |
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return $this->CloudStatus == 'Live' ? $this->getCloudURL() : parent::getAbsoluteURL(); |
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} |
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public function getAbsoluteSize() |
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{ |
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$this->createLocalIfNeeded(); |
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return $this->CloudStatus == 'Live' ? $this->CloudSize : parent::getAbsoluteSize(); |
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} |
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public function exists() |
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{ |
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$this->createLocalIfNeeded(); |
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return parent::exists(); |
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} |
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/** |
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* Save the dimensions before we potentially wipe out the file |
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*/ |
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public function onBeforeCloudPut() |
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{ |
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$this->setCloudMeta('Dimensions', $this->getDimensions('live')); |
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} |
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/** |
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* @param string $dim - 'string' or 0 (width) or 1 (height) |
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* @return int|string |
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*/ |
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public function getDimensions($dim = "string") |
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{ |
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// give an option to get the real dimensions |
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if ($dim === 'live') { |
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return parent::getDimensions(); |
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} |
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if ($this->CloudStatus != 'Live') { |
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return parent::getDimensions($dim); |
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} |
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// otherwise we need to resort to stored dimensions because the |
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// file may be in the cloud and the local may be a placeholder |
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$val = $this->getCloudMeta('Dimensions'); |
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if (empty($val) || !preg_match('/^\d+x\d+$/', $val)) { |
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$this->downloadFromCloud(); |
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$val = parent::getDimensions('string'); |
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$this->convertToPlaceholder(); |
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if (preg_match('/^\d+x\d+$/', $val)) { |
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$this->setCloudMeta('Dimensions', $val); |
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$this->write(); |
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} else { |
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CloudAssets::inst()->getLogger()->error("Corrupted image/metadata in {$this->ID} => {$val}"); |
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$val = "1x1"; |
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} |
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} |
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if ($dim === 'string') { |
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return $val; |
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} |
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$val = explode('x', $val); |
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return $val[$dim]; |
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} |
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/** |
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* Return an image object representing the image in the given format. |
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* This image will be generated using generateFormattedImage(). |
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* The generated image is cached, to flush the cache append ?flush=1 to your URL. |
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* |
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* Just pass the correct number of parameters expected by the working function |
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* |
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* @param string $format The name of the format. |
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* @return CloudImageCached|null |
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*/ |
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public function getFormattedImage($format) |
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{ |
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$args = func_get_args(); |
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$logger = CloudAssets::inst()->getLogger(); |
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if ($this->ID && $this->Filename && Director::fileExists($this->Filename)) { |
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$cacheFile = call_user_func_array(array($this, "cacheFilename"), $args); |
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$cachePath = Director::baseFolder()."/".$cacheFile; |
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/** @var CloudImageCachedStore $stored */ |
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$stored = CloudImageCachedStore::get()->filter('Filename', $cacheFile)->first(); |
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if ($stored && !$stored->exists()) { |
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$stored = null; |
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} |
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// If ?flush is present, always wipe existing data and start clean |
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if (isset($_GET['flush'])) { |
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// There was a bug here caused by the fact that GDBackend tries |
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// to read the size off the cached image, which would be a placeholder |
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// in certain cases. |
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// I'm not 100% sure what the correct behaviour is here. For now |
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// we'll destroy the existing image, causing it to be re-uploaded |
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// every time. That seems safer if a little bit wasteful. |
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$logger->debug("CloudAssets: deleting cached image because of flush: $cachePath"); |
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if (file_exists($cachePath)) { |
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unlink($cachePath); |
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} |
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// delete the existing meta if it existed |
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if ($stored) { |
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$stored->delete(); |
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$stored = null; |
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} |
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} |
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// start building out the record |
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$cached = new CloudImageCached($cacheFile); |
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$cached->Title = $this->Title; |
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$cached->ParentID = $this->ParentID; |
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// Is there a meta record for this formatted file? |
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if ($stored) { |
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// Has it been successfully uploaded to the cloud? |
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// If so, we can just send this puppy on |
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// If not, is there a local file that's present and correct? |
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// If not, we need to wipe the meta and anything local and regenerate |
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if ($stored->CloudStatus !== 'Live' && $cached->isLocalMissing()) { |
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$stored->delete(); |
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$stored = null; |
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if (file_exists($cachePath)) { |
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unlink($cachePath); |
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} |
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} else { |
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$cached->setStoreRecord($stored); |
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} |
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} |
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// If there is no meta record (or an invalid one), is there a local file or placeholder? |
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if (!$stored) { |
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// if the local exists as a placeholder, we need to check if the cloud version is valid |
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if (file_exists($cachePath) && $cached->containsPlaceholder()) { |
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try { |
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$cached->downloadFromCloud(); |
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} catch (Exception $e) { |
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// We want to fail silently here if there is any trouble |
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// because we can always regenerate the thumbnail |
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if (CloudAssets::config()->missing_image) { |
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return new CloudImageMissing($this, $args); |
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} |
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} |
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} |
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// If we don't have a valid local version at this point... |
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if ($cached->isLocalMissing()) { |
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// delete whatever might have been there |
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if (file_exists($cachePath)) { |
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unlink($cachePath); |
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} |
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$logger->debug("CloudAssets: generating formatted image at $cachePath"); |
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// Regenerate the formatted image |
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if ($this->CloudStatus === 'Live' && $this->isLocalMissing()) { |
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try { |
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$this->downloadFromCloud(); |
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} catch (Exception $e) { |
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if (CloudAssets::config()->missing_image) { |
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return new CloudImageMissing($this, $args); |
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} |
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} |
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call_user_func_array(array($this, "generateFormattedImage"), $args); |
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$this->convertToPlaceholder(); |
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} else { |
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call_user_func_array(array($this, "generateFormattedImage"), $args); |
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} |
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} |
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// If we now have a valid image, generate a stored meta record for it |
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if (file_exists($cachePath)) { |
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$stored = new CloudImageCachedStore(); |
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$stored->Filename = $cacheFile; |
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$stored->SourceID = $this->ID; |
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$stored->write(); |
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// all the other fields will get set when the cloud status is updated |
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$cached->setStoreRecord($stored); |
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} |
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} |
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// upload to cloud if needed |
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$cached->updateCloudStatus(); |
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return $cached; |
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} |
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} |
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/** |
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* Checks if the local file is an image that can be used and not |
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* a placeholder or a corrupted file. |
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* |
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* @return bool |
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*/ |
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public function isLocalValid() |
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{ |
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$path = $this->getFullPath(); |
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if (!file_exists($path)) { |
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return false; |
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} |
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return (getimagesize($path) !== false); |
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} |
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/** |
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* @return int The number of formatted images deleted |
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*/ |
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public function deleteFormattedImages() |
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{ |
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foreach ($this->DerivedImages() as $store) { |
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$img = $store->getCloudImageCached(); |
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$img->delete(); |
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} |
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// The above should have covered everything but this will clean up any |
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// loose ends that were maybe created before wrapping or fell through a crack |
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parent::deleteFormattedImages(); |
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} |
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} |
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