BookStack/app/Uploads/ImageService.php

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<?php namespace BookStack\Uploads;
use BookStack\Auth\User;
use BookStack\Exceptions\ImageUploadException;
use DB;
use Exception;
use Illuminate\Contracts\Cache\Repository as Cache;
use Illuminate\Contracts\Filesystem\Factory as FileSystem;
use Intervention\Image\Exception\NotSupportedException;
use Intervention\Image\ImageManager;
use Symfony\Component\HttpFoundation\File\UploadedFile;
class ImageService extends UploadService
{
protected $imageTool;
protected $cache;
protected $storageUrl;
protected $image;
/**
* ImageService constructor.
* @param Image $image
* @param ImageManager $imageTool
* @param FileSystem $fileSystem
* @param Cache $cache
*/
public function __construct(Image $image, ImageManager $imageTool, FileSystem $fileSystem, Cache $cache)
{
$this->image = $image;
$this->imageTool = $imageTool;
$this->cache = $cache;
parent::__construct($fileSystem);
}
/**
* Get the storage that will be used for storing images.
* @param string $type
* @return \Illuminate\Contracts\Filesystem\Filesystem
*/
protected function getStorage($type = '')
{
$storageType = config('filesystems.default');
// Override default location if set to local public to ensure not visible.
if ($type === 'system' && $storageType === 'local_secure') {
$storageType = 'local';
}
return $this->fileSystem->disk($storageType);
}
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/**
* Saves a new image from an upload.
* @param UploadedFile $uploadedFile
* @param string $type
* @param int $uploadedTo
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* @return mixed
* @throws ImageUploadException
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*/
public function saveNewFromUpload(UploadedFile $uploadedFile, $type, $uploadedTo = 0)
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{
$imageName = $uploadedFile->getClientOriginalName();
$imageData = file_get_contents($uploadedFile->getRealPath());
return $this->saveNew($imageName, $imageData, $type, $uploadedTo);
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}
/**
* Save a new image from a uri-encoded base64 string of data.
* @param string $base64Uri
* @param string $name
* @param string $type
* @param int $uploadedTo
* @return Image
* @throws ImageUploadException
*/
public function saveNewFromBase64Uri(string $base64Uri, string $name, string $type, $uploadedTo = 0)
{
$splitData = explode(';base64,', $base64Uri);
if (count($splitData) < 2) {
throw new ImageUploadException("Invalid base64 image data provided");
}
$data = base64_decode($splitData[1]);
return $this->saveNew($name, $data, $type, $uploadedTo);
}
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/**
* Gets an image from url and saves it to the database.
* @param $url
* @param string $type
* @param bool|string $imageName
* @return mixed
* @throws \Exception
*/
private function saveNewFromUrl($url, $type, $imageName = false)
{
$imageName = $imageName ? $imageName : basename($url);
$imageData = file_get_contents($url);
if ($imageData === false) {
throw new \Exception(trans('errors.cannot_get_image_from_url', ['url' => $url]));
}
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return $this->saveNew($imageName, $imageData, $type);
}
/**
* Saves a new image
* @param string $imageName
* @param string $imageData
* @param string $type
* @param int $uploadedTo
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* @return Image
* @throws ImageUploadException
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*/
private function saveNew($imageName, $imageData, $type, $uploadedTo = 0)
{
$storage = $this->getStorage($type);
$secureUploads = setting('app-secure-images');
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$imageName = str_replace(' ', '-', $imageName);
$imagePath = '/uploads/images/' . $type . '/' . Date('Y-m-M') . '/';
while ($storage->exists($imagePath . $imageName)) {
$imageName = str_random(3) . $imageName;
}
$fullPath = $imagePath . $imageName;
if ($secureUploads) {
$fullPath = $imagePath . str_random(16) . '-' . $imageName;
}
try {
$storage->put($fullPath, $imageData);
$storage->setVisibility($fullPath, 'public');
} catch (Exception $e) {
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throw new ImageUploadException(trans('errors.path_not_writable', ['filePath' => $fullPath]));
}
$imageDetails = [
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'name' => $imageName,
'path' => $fullPath,
'url' => $this->getPublicUrl($fullPath),
'type' => $type,
'uploaded_to' => $uploadedTo
];
if (user()->id !== 0) {
$userId = user()->id;
$imageDetails['created_by'] = $userId;
$imageDetails['updated_by'] = $userId;
}
$image = $this->image->newInstance();
$image->forceFill($imageDetails)->save();
return $image;
}
/**
* Checks if the image is a gif. Returns true if it is, else false.
* @param Image $image
* @return boolean
*/
protected function isGif(Image $image)
{
return strtolower(pathinfo($image->path, PATHINFO_EXTENSION)) === 'gif';
}
/**
* Get the thumbnail for an image.
* If $keepRatio is true only the width will be used.
* Checks the cache then storage to avoid creating / accessing the filesystem on every check.
* @param Image $image
* @param int $width
* @param int $height
* @param bool $keepRatio
* @return string
* @throws Exception
* @throws ImageUploadException
*/
public function getThumbnail(Image $image, $width = 220, $height = 220, $keepRatio = false)
{
if ($keepRatio && $this->isGif($image)) {
return $this->getPublicUrl($image->path);
}
$thumbDirName = '/' . ($keepRatio ? 'scaled-' : 'thumbs-') . $width . '-' . $height . '/';
$imagePath = $image->path;
$thumbFilePath = dirname($imagePath) . $thumbDirName . basename($imagePath);
if ($this->cache->has('images-' . $image->id . '-' . $thumbFilePath) && $this->cache->get('images-' . $thumbFilePath)) {
return $this->getPublicUrl($thumbFilePath);
}
$storage = $this->getStorage($image->type);
if ($storage->exists($thumbFilePath)) {
return $this->getPublicUrl($thumbFilePath);
}
try {
$thumb = $this->imageTool->make($storage->get($imagePath));
} catch (Exception $e) {
if ($e instanceof \ErrorException || $e instanceof NotSupportedException) {
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throw new ImageUploadException(trans('errors.cannot_create_thumbs'));
}
throw $e;
}
if ($keepRatio) {
$thumb->resize($width, null, function ($constraint) {
$constraint->aspectRatio();
$constraint->upsize();
});
} else {
$thumb->fit($width, $height);
}
$thumbData = (string)$thumb->encode();
$storage->put($thumbFilePath, $thumbData);
$storage->setVisibility($thumbFilePath, 'public');
$this->cache->put('images-' . $image->id . '-' . $thumbFilePath, $thumbFilePath, 60 * 72);
return $this->getPublicUrl($thumbFilePath);
}
/**
* Get the raw data content from an image.
* @param Image $image
* @return string
* @throws \Illuminate\Contracts\Filesystem\FileNotFoundException
*/
public function getImageData(Image $image)
{
$imagePath = $image->path;
$storage = $this->getStorage();
return $storage->get($imagePath);
}
/**
* Destroy an image along with its revisions, thumbnails and remaining folders.
* @param Image $image
* @throws Exception
*/
public function destroy(Image $image)
{
$this->destroyImagesFromPath($image->path);
$image->delete();
}
/**
* Destroys an image at the given path.
* Searches for image thumbnails in addition to main provided path..
* @param string $path
* @return bool
*/
protected function destroyImagesFromPath(string $path)
{
$storage = $this->getStorage();
$imageFolder = dirname($path);
$imageFileName = basename($path);
$allImages = collect($storage->allFiles($imageFolder));
// Delete image files
$imagesToDelete = $allImages->filter(function ($imagePath) use ($imageFileName) {
$expectedIndex = strlen($imagePath) - strlen($imageFileName);
return strpos($imagePath, $imageFileName) === $expectedIndex;
});
$storage->delete($imagesToDelete->all());
// Cleanup of empty folders
$foldersInvolved = array_merge([$imageFolder], $storage->directories($imageFolder));
foreach ($foldersInvolved as $directory) {
if ($this->isFolderEmpty($directory)) {
$storage->deleteDirectory($directory);
}
}
return true;
}
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/**
* Save a gravatar image and set a the profile image for a user.
* @param \BookStack\Auth\User $user
* @param int $size
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* @return mixed
* @throws Exception
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*/
public function saveUserGravatar(User $user, $size = 500)
{
$emailHash = md5(strtolower(trim($user->email)));
$url = 'https://www.gravatar.com/avatar/' . $emailHash . '?s=' . $size . '&d=identicon';
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$imageName = str_replace(' ', '-', $user->name . '-gravatar.png');
$image = $this->saveNewFromUrl($url, 'user', $imageName);
$image->created_by = $user->id;
$image->updated_by = $user->id;
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$image->save();
return $image;
}
/**
* Delete gallery and drawings that are not within HTML content of pages or page revisions.
* Checks based off of only the image name.
* Could be much improved to be more specific but kept it generic for now to be safe.
*
* Returns the path of the images that would be/have been deleted.
* @param bool $checkRevisions
* @param bool $dryRun
* @param array $types
* @return array
*/
public function deleteUnusedImages($checkRevisions = true, $dryRun = true, $types = ['gallery', 'drawio'])
{
$types = array_intersect($types, ['gallery', 'drawio']);
$deletedPaths = [];
$this->image->newQuery()->whereIn('type', $types)
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->chunk(1000, function ($images) use ($types, $checkRevisions, &$deletedPaths, $dryRun) {
foreach ($images as $image) {
$searchQuery = '%' . basename($image->path) . '%';
$inPage = DB::table('pages')
->where('html', 'like', $searchQuery)->count() > 0;
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$inRevision = false;
if ($checkRevisions) {
$inRevision = DB::table('page_revisions')
->where('html', 'like', $searchQuery)->count() > 0;
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}
if (!$inPage && !$inRevision) {
$deletedPaths[] = $image->path;
if (!$dryRun) {
$this->destroy($image);
}
}
}
});
return $deletedPaths;
}
/**
* Convert a image URI to a Base64 encoded string.
* Attempts to find locally via set storage method first.
* @param string $uri
* @return null|string
* @throws \Illuminate\Contracts\Filesystem\FileNotFoundException
*/
public function imageUriToBase64(string $uri)
{
$isLocal = strpos(trim($uri), 'http') !== 0;
// Attempt to find local files even if url not absolute
$base = baseUrl('/');
if (!$isLocal && strpos($uri, $base) === 0) {
$isLocal = true;
$uri = str_replace($base, '', $uri);
}
$imageData = null;
if ($isLocal) {
$uri = trim($uri, '/');
$storage = $this->getStorage();
if ($storage->exists($uri)) {
$imageData = $storage->get($uri);
}
} else {
try {
$ch = curl_init();
curl_setopt_array($ch, [CURLOPT_URL => $uri, CURLOPT_RETURNTRANSFER => 1, CURLOPT_CONNECTTIMEOUT => 5]);
$imageData = curl_exec($ch);
$err = curl_error($ch);
curl_close($ch);
if ($err) {
throw new \Exception("Image fetch failed, Received error: " . $err);
}
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} catch (\Exception $e) {
}
}
if ($imageData === null) {
return null;
}
return 'data:image/' . pathinfo($uri, PATHINFO_EXTENSION) . ';base64,' . base64_encode($imageData);
}
/**
* Gets a public facing url for an image by checking relevant environment variables.
* @param string $filePath
* @return string
*/
private function getPublicUrl($filePath)
{
if ($this->storageUrl === null) {
$storageUrl = config('filesystems.url');
// Get the standard public s3 url if s3 is set as storage type
// Uses the nice, short URL if bucket name has no periods in otherwise the longer
// region-based url will be used to prevent http issues.
if ($storageUrl == false && config('filesystems.default') === 's3') {
$storageDetails = config('filesystems.disks.s3');
if (strpos($storageDetails['bucket'], '.') === false) {
$storageUrl = 'https://' . $storageDetails['bucket'] . '.s3.amazonaws.com';
} else {
$storageUrl = 'https://s3-' . $storageDetails['region'] . '.amazonaws.com/' . $storageDetails['bucket'];
}
}
$this->storageUrl = $storageUrl;
}
$basePath = ($this->storageUrl == false) ? baseUrl('/') : $this->storageUrl;
return rtrim($basePath, '/') . $filePath;
}
}