blue-twilight/app/Services/PhotoService.php

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<?php
namespace App\Services;
use App\Album;
use App\AlbumSources\IAlbumSource;
use App\Helpers\FileHelper;
use App\Helpers\ImageHelper;
use App\Helpers\MiscHelper;
use App\Helpers\ThemeHelper;
use App\Photo;
use Symfony\Component\HttpFoundation\File\File;
class PhotoService
{
const METADATA_VERSION = 2;
/**
* @var Album
*/
private $album;
/**
* @var IAlbumSource
*/
private $albumSource;
/**
* @var ImageHelper
*/
private $imageHelper;
/**
* @var Photo
*/
private $photo;
/**
* @var ThemeHelper
*/
private $themeHelper;
public function __construct(Photo $photo)
{
$this->photo = $photo;
$this->album = $photo->album;
$this->albumSource = $this->album->getAlbumSource();
$this->imageHelper = new ImageHelper();
$this->themeHelper = new ThemeHelper();
}
public function analyse($queueToken, $isReanalyse = false)
{
$queuePath = FileHelper::getQueuePath($queueToken);
$photoFile = join(DIRECTORY_SEPARATOR, [$queuePath, $this->photo->storage_file_name]);
try
{
$imageInfo = null;
$originalPhotoResource = $this->imageHelper->openImage($photoFile, $imageInfo);
if ($originalPhotoResource === false)
{
throw new \Exception(sprintf('The image "%s" does not appear to be a valid image, or cannot be read', pathinfo($photoFile, PATHINFO_FILENAME)));
}
$this->photo->width = $imageInfo[0];
$this->photo->height = $imageInfo[1];
$this->photo->mime_type = $imageInfo['mime'];
// Read the Exif data
if (empty($this->photo->raw_exif_data))
{
$exifData = @exif_read_data($photoFile);
$isExifDataFound = ($exifData !== false && is_array($exifData));
$this->photo->raw_exif_data = $isExifDataFound ? base64_encode(serialize($exifData)) : '';
}
else
{
$exifData = unserialize(base64_decode($this->photo->raw_exif_data));
$isExifDataFound = ($exifData !== false && is_array($exifData));
}
$angleToRotate = 0;
// If Exif data contains an Orientation, ensure we rotate the original image as such (providing we don't
// currently have a metadata version - i.e. it hasn't been read and rotated already before)
if ($isExifDataFound && isset($exifData['Orientation']) && !$isReanalyse)
{
switch ($exifData['Orientation'])
{
case 3:
$angleToRotate = 180;
break;
case 6:
$angleToRotate = 270;
break;
case 8:
$angleToRotate = 90;
break;
}
if ($angleToRotate > 0)
{
$originalPhotoResource = $this->imageHelper->rotateImage($originalPhotoResource, $angleToRotate);
if ($angleToRotate == 90 || $angleToRotate == 270)
{
$this->photo->width = $imageInfo[1];
$this->photo->height = $imageInfo[0];
}
$this->imageHelper->saveImage($originalPhotoResource, $photoFile, $imageInfo);
}
}
if ($isExifDataFound)
{
$this->photo->metadata_version = self::METADATA_VERSION;
$this->photo->taken_at = $this->metadataDateTime($exifData, $this->photo->taken_at);
$this->photo->camera_make = $this->metadataCameraMake($exifData, $this->photo->camera_make);
$this->photo->camera_model = $this->metadataCameraModel($exifData, $this->photo->camera_model);
$this->photo->camera_software = $this->metadataCameraSoftware($exifData, $this->photo->camera_software);
$this->photo->aperture_fnumber = $this->metadataApertureFNumber($exifData, $this->photo->aperture_fnumber);
$this->photo->iso_number = $this->metadataIsoNumber($exifData, $this->photo->iso_number);
$this->photo->focal_length = $this->metadataFocalLength($exifData, $this->photo->focal_length);
$this->photo->shutter_speed = $this->metadataExposureTime($exifData, $this->photo->shutter_speed);
}
$this->photo->is_analysed = true;
$this->photo->save();
// Save the original
$this->albumSource->saveThumbnail($this->photo, $photoFile);
$this->regenerateThumbnails($originalPhotoResource);
}
catch (\Exception $ex)
{
throw $ex;
}
finally
{
@unlink($photoFile);
// If the queue directory is now empty, get rid of it
FileHelper::deleteIfEmpty($queuePath);
}
}
public function changeAlbum(Album $newAlbum)
{
/** @var IAlbumSource $currentSource */
$currentSource = $this->photo->album->getAlbumSource();
$newSource = $newAlbum->getAlbumSource();
// First export the original photo from the storage provider
$photoPath = $this->downloadToTemporaryFolder();
// Save to the new album
$newSource->saveThumbnail($this->photo, $photoPath);
// Delete the original
$this->delete();
// Update the ID and new file name
$this->photo->album_id = $newAlbum->id;
$this->photo->save();
// Switch to the new album source
$this->albumSource = $newSource;
// Regenerate the thumbnails in the new album
$this->regenerateThumbnails();
}
public function delete()
{
// Remove all thumbnails first - so if any fail, we don't delete the original
$themeInfo = $this->themeHelper->info();
$thumbnailsRequired = $themeInfo['thumbnails'];
/** @var mixed $thumbnail */
foreach ($thumbnailsRequired as $thumbnail)
{
$this->albumSource->deleteThumbnail($this->photo, $thumbnail['name']);
}
// Next remove the original photo
$this->albumSource->deleteThumbnail($this->photo);
// Finally remove the database record
$this->photo->delete();
}
public function downloadOriginalToFolder($folderPath)
{
$photoPath = join(DIRECTORY_SEPARATOR, [$folderPath, $this->photo->storage_file_name]);
$photoHandle = fopen($photoPath, 'w');
$stream = $this->albumSource->fetchPhotoContent($this->photo);
$stream->rewind();
while (!$stream->feof())
{
fwrite($photoHandle, $stream->read(4096));
}
fflush($photoHandle);
fclose($photoHandle);
$stream->close();
return $photoPath;
}
public function flip($horizontal, $vertical)
{
// First export the original photo from the storage provider
$photoPath = $this->downloadToTemporaryFolder();
$imageInfo = array();
$originalPhotoImage = $this->imageHelper->openImage($photoPath, $imageInfo);
if ($this->imageHelper->flipImage($originalPhotoImage, boolval($horizontal), boolval($vertical)))
{
$this->imageHelper->saveImage($originalPhotoImage, $photoPath, $imageInfo);
// Update and save the original image back to the storage provider
$this->albumSource->saveThumbnail($this->photo, $photoPath);
// Re-create the thumbnails
$this->regenerateThumbnails($originalPhotoImage);
$this->photo->save();
}
// Remove the temp file
@unlink($photoPath);
}
public function regenerateThumbnails($originalPhotoResource = null)
{
$photoPath = null;
if (is_null($originalPhotoResource))
{
// First export the original photo from the storage provider
$photoPath = $this->downloadToTemporaryFolder();
$imageInfo = null;
$originalPhotoResource = $this->imageHelper->openImage($photoPath, $imageInfo);
}
// Generate and save thumbnails
$themeInfo = $this->themeHelper->info();
$thumbnailsRequired = $themeInfo['thumbnails'];
/** @var mixed $thumbnail */
foreach ($thumbnailsRequired as $thumbnail)
{
$generatedThumbnailPath = $this->imageHelper->generateThumbnail($originalPhotoResource, $this->photo, $thumbnail);
$this->albumSource->saveThumbnail($this->photo, $generatedThumbnailPath, $thumbnail['name']);
@unlink($generatedThumbnailPath);
}
if (is_null($originalPhotoResource) && !is_null($photoPath))
{
// Remove the temp file
@unlink($photoPath);
}
}
public function rotate($angle)
{
$imageInfo = array();
// First export the photo from the storage provider
$photoPath = $this->downloadToTemporaryFolder();
$originalPhotoImage = $this->imageHelper->openImage($photoPath, $imageInfo);
$originalPhotoImage = $this->imageHelper->rotateImage($originalPhotoImage, intval($angle));
$this->imageHelper->saveImage($originalPhotoImage, $photoPath, $imageInfo);
// Update and save the original image back to the storage provider
$this->albumSource->saveThumbnail($this->photo, $photoPath);
if ($angle == 90 || $angle == 270)
{
$width = $this->photo->width;
$this->photo->width = $this->photo->height;
$this->photo->height = $width;
}
$this->regenerateThumbnails($originalPhotoImage);
$this->photo->save();
// Remove the temp file
@unlink($photoPath);
}
private function calculateValueFromFraction($input)
{
$split = explode('/', $input);
if (count($split) != 2)
{
return $split;
}
$numerator = intval($split[0]);
$denominator = intval($split[1]);
return $denominator == 0
? 0
: ($numerator / $denominator);
}
private function downloadToTemporaryFolder()
{
$photoPath = tempnam(sys_get_temp_dir(), 'BlueTwilight_');
$photoHandle = fopen($photoPath, 'w');
$stream = $this->albumSource->fetchPhotoContent($this->photo);
$stream->rewind();
while (!$stream->feof())
{
fwrite($photoHandle, $stream->read(4096));
}
fflush($photoHandle);
fclose($photoHandle);
$stream->close();
return $photoPath;
}
private function metadataApertureFNumber(array $exifData, $originalValue = null)
{
if (isset($exifData['FNumber']))
{
$value = $this->calculateValueFromFraction($exifData['FNumber']);
if (intval($value) === $value)
{
return sprintf('f/%d', $value);
}
return sprintf('f/%0.1f', $value);
}
return $originalValue;
}
private function metadataCameraMake(array $exifData, $originalValue = null)
{
if (isset($exifData['Make']))
{
return $exifData['Make'];
}
return $originalValue;
}
private function metadataCameraModel(array $exifData, $originalValue = null)
{
if (isset($exifData['Model']))
{
return $exifData['Model'];
}
return $originalValue;
}
private function metadataCameraSoftware(array $exifData, $originalValue = null)
{
if (isset($exifData['Software']))
{
return $exifData['Software'];
}
return $originalValue;
}
private function metadataDateTime(array $exifData, $originalValue = null)
{
$dateTime = null;
if (isset($exifData['DateTimeOriginal']))
{
$dateTime = $exifData['DateTimeOriginal'];
}
else if (isset($exifData['DateTime']))
{
$dateTime = $exifData['DateTime'];
}
if (is_null($dateTime))
{
return $originalValue;
}
return preg_replace('/^([\d]{4}):([\d]{2}):([\d]{2})/', '$1-$2-$3', $dateTime);
}
private function metadataExposureTime(array $exifData, $originalValue = null)
{
if (isset($exifData['ExposureTime']))
{
$decimal = $this->calculateValueFromFraction($exifData['ExposureTime']);
$fraction = MiscHelper::decimalToFraction($decimal);
return sprintf('%d/%d', $fraction[0], $fraction[1]);
}
return $originalValue;
}
private function metadataFocalLength(array $exifData, $originalValue = null)
{
if (isset($exifData['FocalLength']))
{
return $this->calculateValueFromFraction($exifData['FocalLength']);
}
return $originalValue;
}
private function metadataIsoNumber(array $exifData, $originalValue = null)
{
if (isset($exifData['ISOSpeedRatings']))
{
return $exifData['ISOSpeedRatings'];
}
return $originalValue;
}
}