Laravel 5.x file attachment helpers

This package allows to quickly attach files to your models, retrievable by key, group name or using the Eloquent relationship.

Can also be installed on Laravel 5.4, see below

Installation

You can install this package via composer. Laravel 5.5+ auto discovers the service provider.

composer require bnbwebexpertise/laravel-attachments

Older Laravel 5.4 install

For 5.4 support install version 0.0.16 :

composer require bnbwebexpertise/laravel-attachments:0.0.16

Then add the service provider to your configuration :

'providers' => [
        // ...

        Bnb\Laravel\Attachments\AttachmentsServiceProvider::class,

        // ...
],

Configuration

You can customize this package behavior by publishing the configuration file :

php artisan vendor:publish --provider='Bnb\Laravel\Attachments\AttachmentsServiceProvider'

Add attachments to a model class

Add the HasAttachment trait to your model class :

<?php

namespace App;

use Bnb\Laravel\Attachments\HasAttachment;
use Illuminate\Notifications\Notifiable;
use Illuminate\Foundation\Auth\User as Authenticatable;

class User extends Authenticatable
{
    use Notifiable, HasAttachment;

    // ...
}

Then use it to bind a file to an instance :

$user = App\User::create([
    'name' => 'name',
    'email' => '[email protected]',
    'password' => 'password',
]);

// Bind a local file
$attachment = $user->attach('local/path/to/file.txt');

// Bind an uploaded file
$attachment = $user->attach(\Request::file('uploaded_file'));

// Bind an uploaded file with options
$attachment = $user->attach(\Request::file('uploaded_file'), [
    'disk' => 's3',
    'title' => \Request::input('attachment_title'),
    'description' => \Request::input('attachment_description'),
    'key' => \Request::input('attachment_key'),
]);

Retrieve model's attachments

$user = App\User::first();

$allAttachments = $user->attachments()->get();

$attachmentByKey = $user->attachment('myKey');

// Attachment public URL
$publicUrl = $attachmentByKey->url;

Regroup model's attachments

The group attribute allows to group attachements. The attachementsGroup method provided by the HasAttachment trait returns all the attachments with the given group value.

$user = App\User::first();

$user->attach($somefile, ['
    'group' => 'album',
']);

$user->attach($otherfile, ['
    'group' => 'album',
']);

$attachmentsByGroup = $user->attachmentsGroup('album');

Delete an attachment

Calling the delete() method on an attachment model instance will delete the database row and the file. The deletion of the file can be disabled by setting the behaviors.cascade_delete to false in the configuration.

Not that calling delete() on a query() like statement will not cascade to the filesystem because it will not call the delete() method of the Attachment model class.

$user = App\User::first();
$attachmentByKey = $user->attachment('myKey');
$attachmentByKey->delete(); // Will also delete the file on the storage by default

Hooking the file output

The Bnb\Laravel\Attachments\Attachment model class provides an outputting event that you can observe.

In the application service provider you could write for example :

<?php
use Bnb\Laravel\Attachments\Attachment;

class AppServiceProvider extends ServiceProvider
{
    // ...

    public function boot() {

        // ...

        Attachment::outputting(function ($attachment) {
            /** @var Attachment $attachment */

            // Get the related model
            $model = $attachment->model;

            if (empty($model)) {
                // Deny output for attachments not linked to a model

                return false;
            }

            if ($model instanceof \App\User) {
                // Check if current user is granted and owner

                $user = \Auth::user();

                return $user && $user->can('download-file') && $user->id == $model->id;
            }
        });

        // ...
    }


    // ...
}

Dropzone

Upload

This package provides a server endpoint for Dropzone.js or equivalent via the attachments.dropzone route alias.

It returns the attachment uuid along other fields as a JSON response. This value can be sent back later to the server to bind it to a model instance (deferred saving).

The form :

<form action="{{ route('attachments.dropzone')  }}" class="dropzone" id="my-dropzone">
    {{ csrf_field() }}
</form>

The response :

{
  "title": "b39ffd84524b",
  "filename": "readme.md",
  "filesize": 2906,
  "filetype": "text\/html",
  "uuid": "f5a8eec2-d860-4e53-8451-b39ffd84524b",
  "key": "58ac52e90db938.72105394",
  "url": "http:\/\/laravel.dev:8888\/attachments\/f5a8eec2-d860-4e53-8451-b39ffd84524b\/readme.md"
}

Send it back later :

<form action="/upload" method="post">
    {{ csrf_field() }}
    <input type="hidden" name="attachment_id" id="attachment_id">
    <button type="submit">Save</button>
</form>

<!-- Where attachment_id is populated on success -->

<script>
    Dropzone.options.myDropzone = {
        init: function () {
            this.on("success", function (file, response) {
                document.getElementById('attachment_id').value = response.uuid;
            });
        }
    };
</script>

Bind the value later :

<?php

Route::post('/upload', function () {
    $model = App\User::first();

    Bnb\Laravel\Attachments\Attachment::attach(Request::input('attachment_id'), $model);

    return redirect('/dropzone');
});

Delete

The route attachments.dropzone.delete can be called via HTTP DELETE. The attachment ID must be provided as parameter.

The delete action provided by this route only works for pending attachement (not bound to a model).

To prevent deletion of other users file, the current CSRF token is saved when uploading via the dropzone endpoint and it must be the same when calling the dropzone delete endpoint. This behavior can be deactivated via the configuration or env key (see config/attachments.php).

Usage example :

<script>
var MyDropzone = {
    url: "{{ route('attachments.dropzone.delete', ['id' => ':id']) }}"
    // ...
    deletedfile: function (file) {
        axios.delete(this.url.replace(/:id/, file.id)).then(function () {
            //...
        });
    }
    //...
}
</script>

Events

Two event are fired by the dropzone endpoints controller :

• attachments.dropzone.uploading with the $request : Request as parameter
• attachments.dropzone.deleting with the $request : Request and the $file : Attachement as parameters

If one of the listeners returns false, the action is aborted.

public function boot()
{
    Event::listen('attachments.dropzone.uploading', function ($request) {
        return $this->isAllowedToUploadFile($request);
    });

    Event::listen('attachments.dropzone.deleting', function ($request, $file) {
        return $this->canDeletePendingFile($request, $file);
    });
}

Temporary URLs

It is possible to generate a unique temporary URL for downloading the attachments via the getTemporaryUrl method of the Attachment model, for sharing purposes foremost.
The getTemporaryUrl method has one parameter : a Carbon date, after which the link will no longer be valid.

The default generated URL is of the form : http://example.com/attachments/shared/<a very long string>. The share path can be modified in the config file under the shared_pattern key.

Cleanup commands

A command is provided to cleanup the attachments not bound to a model (when model_type and model_id are null).

php artisan attachment:cleanup

The -s (or --since=[timeInMinutes]) option can be set to specify another time limit in minutes : only unbound files older than the specified age will be deleted. This value is set to 1440 by default.

Migrate command

To migrate all attachments from one source disk to another :

php artisan attachments:migrate public s3

Files are removed from source disk if successfully saved on the target disk.

Customization

Set a custom database connection name for the models

You can customize the database connection name by either :

• Adding an .env variable for ATTACHMENTS_DATABASE_CONNECTION (recommended) OR
• Changing the configuration option attachments.database.connection in config/attachments.php.

Extends Attachment model columns

The configuration defines the list of fillable attachment attributes in the attachment.attributes key.

This allows you to create migration to add new columns in the attachment table and declare them in your published config at config/attachments.php.

Customize the attachment storage directory prefix

You may easily customize the folder/prefix where new attachments are stored by either:

• Adding an .env variable for ATTACHMENTS_STORAGE_DIRECTORY_PREFIX (recommended) OR
• Changing the configuration option attachments.storage_directory.prefix in config/attachments.php.

The default value is attachments and any trailing /s will be trimmed automatically.

Customize the attachment storage filepath

If you don't want to use the default storage filepath generation, you can provide the filepath option (relative to the root of storage disk). It must contain the directory and filename. It's up to you to ensure that the provided filepath is not in conflict with another file.

$model->attach('/foo/bar/pdf.pdf', ['filepath' => 'foo/bar/test.pdf']);

This does not apply to attachments uploaded via the integrated DropZone controller. Only available for explicit attachments.

Extending the Attachment model class

This can be helpful to add some relations to the attachment model.

Create your own model that extends Bnb\Laravel\Attachments\Attachment :

<?php
namespace App;

class MyAttachment extends Bnb\Laravel\Attachments\Attachment
{
    // ...
    public function someCustomRelation() {
        // ...
    }
    // ...
}

To configure your own model class you can use one of the following possibilities :

• Publish the configuration and update the attachment_model value
• Set the ATTACHMENTS_MODEL environment value
• Bind your model to the Bnb\Laravel\Attachments\Contracts\AttachmentContract interface in a service provider

Examples :

<?php
return [
    // ...
    'attachment_model' => \App\MyAttachment::class,
    // ..
];

# ...
ATTACHMENTS_MODEL=\App\MyAttachment
# ...

<?php
// ...

class AppServiceProvider extends ServiceProvider {
    // ...
    public function register()
    {
        // ...
        $this->app->bind(
            \Bnb\Laravel\Attachments\Contracts\AttachmentContract::class,
            \App\MyAttachment::class
        );
        // ...
    }
    // ...
}