BookStack/app/Http/Controllers/Api/ImageGalleryApiController.php

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<?php
namespace BookStack\Http\Controllers\Api;
use BookStack\Entities\Models\Page;
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use BookStack\Uploads\Image;
use BookStack\Uploads\ImageRepo;
use Illuminate\Http\Request;
class ImageGalleryApiController extends ApiController
{
protected array $fieldsToExpose = [
'id', 'name', 'url', 'path', 'type', 'uploaded_to', 'created_by', 'updated_by', 'created_at', 'updated_at',
];
public function __construct(
protected ImageRepo $imageRepo
) {
}
protected function rules(): array
{
return [
'create' => [
'type' => ['required', 'string', 'in:gallery,drawio'],
'uploaded_to' => ['required', 'integer'],
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'image' => ['required', 'file', ...$this->getImageValidationRules()],
'name' => ['string', 'max:180'],
],
'update' => [
'name' => ['string', 'max:180'],
]
];
}
/**
* Get a listing of images in the system. Includes gallery (page content) images and drawings.
* Requires visibility of the page they're originally uploaded to.
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*/
public function list()
{
$images = Image::query()->scopes(['visible'])
->select($this->fieldsToExpose)
->whereIn('type', ['gallery', 'drawio']);
return $this->apiListingResponse($images, [
...$this->fieldsToExpose
]);
}
/**
* Create a new image in the system.
* Since "image" is expected to be a file, this needs to be a 'multipart/form-data' type request.
* The provided "uploaded_to" should be an existing page ID in the system.
* If the "name" parameter is omitted, the filename of the provided image file will be used instead.
* The "type" parameter should be 'gallery' for page content images, and 'drawio' should only be used
* when the file is a PNG file with diagrams.net image data embedded within.
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*/
public function create(Request $request)
{
$this->checkPermission('image-create-all');
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$data = $this->validate($request, $this->rules()['create']);
Page::visible()->findOrFail($data['uploaded_to']);
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$image = $this->imageRepo->saveNew($data['image'], $data['type'], $data['uploaded_to']);
if (isset($data['name'])) {
$image->refresh();
$image->update(['name' => $data['name']]);
}
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return response()->json($this->formatForSingleResponse($image));
}
/**
* View the details of a single image.
* The "thumbs" response property contains links to scaled variants that BookStack may use in its UI.
* The "content" response property provides HTML and Markdown content, in the format that BookStack
* would typically use by default to add the image in page content, as a convenience.
* Actual image file data is not provided but can be fetched via the "url" response property.
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*/
public function read(string $id)
{
$image = Image::query()->scopes(['visible'])->findOrFail($id);
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return response()->json($this->formatForSingleResponse($image));
}
/**
* Update the details of an existing image in the system.
* Only allows updating of the image name at this time.
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*/
public function update(Request $request, string $id)
{
$data = $this->validate($request, $this->rules()['update']);
$image = $this->imageRepo->getById($id);
$this->checkOwnablePermission('page-view', $image->getPage());
$this->checkOwnablePermission('image-update', $image);
$this->imageRepo->updateImageDetails($image, $data);
return response()->json($this->formatForSingleResponse($image));
}
/**
* Delete an image from the system.
* Will also delete thumbnails for the image.
* Does not check or handle image usage so this could leave pages with broken image references.
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*/
public function delete(string $id)
{
$image = $this->imageRepo->getById($id);
$this->checkOwnablePermission('page-view', $image->getPage());
$this->checkOwnablePermission('image-delete', $image);
$this->imageRepo->destroyImage($image);
return response('', 204);
}
/**
* Format the given image model for single-result display.
*/
protected function formatForSingleResponse(Image $image): array
{
$this->imageRepo->loadThumbs($image);
$data = $image->getAttributes();
$data['created_by'] = $image->createdBy;
$data['updated_by'] = $image->updatedBy;
$data['content'] = [];
$escapedUrl = htmlentities($image->url);
$escapedName = htmlentities($image->name);
if ($image->type === 'drawio') {
$data['content']['html'] = "<div drawio-diagram=\"{$image->id}\"><img src=\"{$escapedUrl}\"></div>";
$data['content']['markdown'] = $data['content']['html'];
} else {
$escapedDisplayThumb = htmlentities($image->thumbs['display']);
$data['content']['html'] = "<a href=\"{$escapedUrl}\" target=\"_blank\"><img src=\"{$escapedDisplayThumb}\" alt=\"{$escapedName}\"></a>";
$mdEscapedName = str_replace(']', '', str_replace('[', '', $image->name));
$mdEscapedThumb = str_replace(']', '', str_replace('[', '', $image->thumbs['display']));
$data['content']['markdown'] = "![{$mdEscapedName}]({$mdEscapedThumb})";
}
return $data;
}
}