README

Image gallery in the administration of Drago Project, for images in the content of articles and pages.

The package adds a backend page where images are uploaded and shown in a grid. Over an image appear three buttons: a full-size preview, copying it to paste into the content of an article or a page, and deleting it. A switch above the images sets what is copied: the Texy markup ([* /upload/gallery/photo.jpg *]) or only the path (/upload/gallery/photo.jpg); the browser remembers the choice.

Requirements

PHP >= 8.3, < 9
Drago Project

Installation

composer require drago-ex/project-gallery

Files copied into the project

The files are copied into the project by drago-ex/project-tools, as set in extra.drago-tools of this package's composer.json.

Assets

Register the Naja extension, which copies the path or the markup of an image, and include the styles of the buttons in assets/admin.js:

import GalleryCopy from './naja/gallery.js';
import './naja/gallery.scss';

registerNajaExtensions(
	// ...
	GalleryCopy
);

The browser allows copying to the clipboard only over HTTPS and on localhost; elsewhere the text is offered in a dialog to copy by hand.

Backend

The gallery is available as:

{link :Backend:Gallery:}

With drago-ex/project-backend-ui, add the link to its menu (see its README).

Images are saved in www/upload/gallery/. An upload is made smaller to fit 1920 × 1920 px and gets a readable name made from its original one (Můj obrázek.JPG → muj-obrazek.jpg), with a number when the name is taken. Up to 20 images of at most 8 MB can be uploaded at once. Resizing needs the PHP extension GD (the Docker image of drago-ex/project-docker has it); without it the gallery offers no upload.

The module uses the permission resource Backend:Gallery. The backend provider allows the administrator role.

Optional add-ons

The package works without them. Set them up by hand as described below when the project needs them.

Permissions

The gallery works without permissions and without drago-ex/permission: the administration shows all its buttons.

For static permissions, the access rules are prepared in bin/create-gallery-permission; drago-ex/permission generates a provider from it (set up as its README shows):

php vendor/bin/drago-commands

To show the upload form and the delete buttons only to roles with the privilege, add the WriteAccess trait of drago-ex/permission; its isWriteAllowed() asks for the gallery-write privilege. In app/Presentation/Backend/Gallery/Component/GalleryControl.php use the trait and pass the result to the template (with public bool $writeAllowed = false; in GalleryTemplate):

use Drago\Permission\WriteAccess;

class GalleryControl extends ExtraControl implements OffcanvasHandle, ModalHandle
{
	use Component;
	use WriteAccess;

	public function render(): void
	{
		// ...
		$template->writeAllowed = $this->isWriteAllowed();

then show the form and the delete button of an image only when allowed:

{if $writeAllowed && $uploadSupported}

<a n:if="$writeAllowed" n:href="delete!, name: $name" …>

Every signal of a component is checked as gallery-write, the preview too. To let a role that may only view the gallery open the preview, mark it read-only in GalleryPresenter (checked as gallery-read):

/** @return list<string> */
protected function readOnlySignals(): array
{
	return ['preview'];
}

For dynamic permissions set in the administration, install drago-ex/project-permission and import the privileges of the gallery into its resources table by hand, so roles can be given them:

php vendor/bin/migration db:migrate vendor/drago-ex/project-gallery/migrations-permission

drago-ex / project-gallery

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