### Install Mailbook Package via Composer

Source: https://github.com/xammie/mailbook/blob/main/README.md

Installs the Mailbook package as a development dependency using Composer.

```bash
composer require --dev xammie/mailbook
```

--------------------------------

### Run Mailbook Installation Command

Source: https://github.com/xammie/mailbook/blob/main/README.md

Executes the artisan command to install Mailbook into the Laravel application, typically creating the mailbook route file.

```bash
php artisan mailbook:install
```

--------------------------------

### Registering Mailable with Database Rollback (PHP)

Source: https://github.com/xammie/mailbook/blob/main/README.md

Example of registering a mailable with Mailbook, demonstrating how database changes made within the closure (e.g., creating models with factories) are automatically rolled back after the mail is rendered.

```php
// All database changes are rolled back after rendering the mail.
Mailbook::add(function (): OrderShippedMail {
    $order = Order::factory()->create();
    $tracker = Tracker::factory()->create();
        
    return new OrderShippedMail($order, $tracker);
});
```

--------------------------------

### Running Mailbook Tests (Bash)

Source: https://github.com/xammie/mailbook/blob/main/README.md

Execute the test suite for the Mailbook package using Composer.

```bash
composer test
```

--------------------------------

### Publishing Mailbook Views (Bash)

Source: https://github.com/xammie/mailbook/blob/main/README.md

Publish the default Mailbook views to your application's resources directory, allowing you to customize the UI.

```bash
php artisan vendor:publish --tag="mailbook-views"
```

--------------------------------

### Publishing Mailbook Configuration File (Bash)

Source: https://github.com/xammie/mailbook/blob/main/README.md

Publish the default Mailbook configuration file to your application's config directory, allowing you to customize its settings.

```bash
php artisan vendor:publish --tag="mailbook-config"
```

--------------------------------

### Register Mailables with Dependency Injection

Source: https://github.com/xammie/mailbook/blob/main/README.md

Illustrates how to use dependency injection within the registration closure, either automatically via type hinting or manually resolving from the container.

```php
// With dependency injection
Mailbook::add(function (VerificationService $verificationService): VerificationMail {
    return new VerificationMail($verificationService, '/example/url');
});

// Without dependency injection
Mailbook::add(function (): VerificationMail {
    $verificationService = app(VerificationService::class);
    
    return new VerificationMail($verificationService, '/example/url');
});
```

--------------------------------

### Register Mailables in Mailbook Routes

Source: https://github.com/xammie/mailbook/blob/main/README.md

Demonstrates two methods to register mailables: directly referencing the class (using DI) or using a closure for custom instantiation and parameter passing.

```php
// This will use dependency injection if your mailable has parameters
Mailbook::add(VerificationMail::class);

// Use a closure to customize the parameters of the mail instance
Mailbook::add(function (): VerificationMail {
    $user = User::factory()->make();

    return new VerificationMail($user, '/example/url');
});
```

--------------------------------

### Register Mailables and Notifications

Source: https://github.com/xammie/mailbook/blob/main/README.md

Shows how to register both standard Laravel Mailables and Notification classes with Mailbook.

```php
// Mailable
Mailbook::add(VerificationMail::class);

// Notification
Mailbook::add(InvoiceCreatedNotification::class);
```

--------------------------------

### Define Mailable Variants

Source: https://github.com/xammie/mailbook/blob/main/README.md

Creates different preview variants for a single mailable class, allowing testing of various scenarios (e.g., different data states) using the `variant()` method.

```php
// Use a closure to customize the parameters of the mail instance
Mailbook::add(OrderCreatedMail::class)
    ->variant('1 item', fn () => new OrderCreatedMail(Order::factory()->withOneProduct()->create()))
    ->variant('2 items', fn () => new OrderCreatedMail(Order::factory()->withTwoProducts()->create()));
```

--------------------------------

### Configure Mailbook Locales

Source: https://github.com/xammie/mailbook/blob/main/README.md

Adds available locales to the Mailbook configuration file (`mailbook.php`) to enable language switching for mail previews.

```php
'locales' => [
    'en' => 'English',
    'nl' => 'Dutch',
    'de' => 'German',
    'es' => 'Spanish'
],
```

--------------------------------

### Register Notification for Specific User

Source: https://github.com/xammie/mailbook/blob/main/README.md

Registers a notification to be previewed as if sent to a specific user instance (notifiable) using the `to()` method.

```php
$user = User::factory()->create();

Mailbook::to($user)->add(WelcomeNotification::class);
```

--------------------------------

### Register Notification for Specific Email

Source: https://github.com/xammie/mailbook/blob/main/README.md

Registers a notification to be previewed as if sent to a specific email address using the `to()` method.

```php
Mailbook::to('example@mailbook.dev')->add(WelcomeNotification::class);
```

--------------------------------

### Configuring Mail Sending in Mailbook (PHP)

Source: https://github.com/xammie/mailbook/blob/main/README.md

Enable and configure the mail sending feature in Mailbook, which adds a button to send the currently selected mail to a specified email address using the default mail driver.

```php
'send' => true,
'send_to' => 'test@mailbook.dev',
```

--------------------------------

### Enabling Database Rollback in Mailbook Configuration (PHP)

Source: https://github.com/xammie/mailbook/blob/main/README.md

Configure Mailbook to automatically rollback database changes after rendering mailables, allowing safe use of factories and queries during development.

```php
'database_rollback' => true,
```

--------------------------------

### Group Mailables by Category

Source: https://github.com/xammie/mailbook/blob/main/README.md

Organizes multiple mailables or notifications under a common category using the `category()` and `group()` methods for better organization in the Mailbook UI.

```php
Mailbook::category('Invoices')->group(function () {
    Mailbook::add(InvoiceCreatedNotification::class);
    Mailbook::add(InvoicePaidNotification::class);
});
```

--------------------------------

### Group Mailables by Category and Recipient

Source: https://github.com/xammie/mailbook/blob/main/README.md

Combines grouping by category and applying a default recipient to a set of mailables or notifications.

```php
Mailbook::to('example@mailbook.dev')
    ->category('Invoices')
    ->group(function () {
        // ...
    });
```

--------------------------------

### Group Mailables with Default Recipient

Source: https://github.com/xammie/mailbook/blob/main/README.md

Applies a default recipient (user or email) to all mailables or notifications registered within a group using the `to()` and `group()` methods.

```php
Mailbook::to('example@mailbook.dev')->group(function () {
    Mailbook::add(WelcomeNotification::class);
    Mailbook::add(TrialEndedNotification::class);
});
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.