# Story 4.6: Timeline Update Notifications

## Epic Reference
**Epic 4:** Case Timeline System

## User Story
As a **client**,
I want **to receive email notifications when my timeline is updated**,
So that **I stay informed about my case progress without checking the portal**.

## Story Context

### Existing System Integration
- **Integrates with:** timeline_updates creation, email system
- **Technology:** Laravel Notifications, queued emails
- **Follows pattern:** Event-driven notification pattern
- **Touch points:** Timeline update creation

## Acceptance Criteria

### Notification Trigger
- [ ] Email sent when new update added to timeline
- [ ] Triggered automatically on TimelineUpdate creation
- [ ] Queued for performance

### Email Content
- [ ] Case name and reference
- [ ] Update summary or full text
- [ ] Date of update
- [ ] Link to view timeline
- [ ] Libra branding

### Language Support
- [ ] Email in client's preferred language
- [ ] Arabic template
- [ ] English template

### Exclusions
- [ ] No email for archived timeline reactivation
- [ ] No email if client deactivated

### Quality Requirements
- [ ] Professional email template
- [ ] Tests for notification sending
- [ ] Error handling for failed sends

## Technical Notes

### Notification Class
```php
<?php

namespace App\Notifications;

use App\Models\TimelineUpdate;
use Illuminate\Bus\Queueable;
use Illuminate\Notifications\Notification;
use Illuminate\Notifications\Messages\MailMessage;

class TimelineUpdateNotification extends Notification
{
    use Queueable;

    public function __construct(
        public TimelineUpdate $update
    ) {}

    public function via(object $notifiable): array
    {
        return ['mail'];
    }

    public function toMail(object $notifiable): MailMessage
    {
        $locale = $notifiable->preferred_language ?? 'ar';
        $timeline = $this->update->timeline;

        return (new MailMessage)
            ->subject($this->getSubject($locale, $timeline->case_name))
            ->markdown('emails.timeline.update.' . $locale, [
                'update' => $this->update,
                'timeline' => $timeline,
                'user' => $notifiable,
            ]);
    }

    private function getSubject(string $locale, string $caseName): string
    {
        return $locale === 'ar'
            ? "تحديث جديد على قضيتك: {$caseName}"
            : "New update on your case: {$caseName}";
    }
}
```

### Email Templates

#### Arabic
```blade
<x-mail::message>
# تحديث جديد على قضيتك

عزيزي {{ $user->name }}،

تم إضافة تحديث جديد على قضيتك:

**القضية:** {{ $timeline->case_name }}
@if($timeline->case_reference)
**الرقم المرجعي:** {{ $timeline->case_reference }}
@endif

**تاريخ التحديث:** {{ $update->created_at->translatedFormat('d M Y - g:i A') }}

---

{!! $update->update_text !!}

---

<x-mail::button :url="route('client.timelines.show', $timeline)">
عرض التفاصيل الكاملة
</x-mail::button>

مع أطيب التحيات،
مكتب ليبرا للمحاماة
</x-mail::message>
```

#### English
```blade
<x-mail::message>
# New Update on Your Case

Dear {{ $user->name }},

A new update has been added to your case:

**Case:** {{ $timeline->case_name }}
@if($timeline->case_reference)
**Reference:** {{ $timeline->case_reference }}
@endif

**Update Date:** {{ $update->created_at->format('M d, Y - g:i A') }}

---

{!! $update->update_text !!}

---

<x-mail::button :url="route('client.timelines.show', $timeline)">
View Full Details
</x-mail::button>

Best regards,
Libra Law Firm
</x-mail::message>
```

### Trigger in Update Creation
```php
// In Story 4.2 addUpdate method
$update = $this->timeline->updates()->create([...]);

// Check if user is active before notifying
if ($this->timeline->user->isActive()) {
    $this->timeline->user->notify(new TimelineUpdateNotification($update));
}
```

### Testing
```php
use App\Notifications\TimelineUpdateNotification;
use Illuminate\Support\Facades\Notification;

it('sends notification when timeline update created', function () {
    Notification::fake();

    $timeline = Timeline::factory()->create();
    $update = TimelineUpdate::factory()->create(['timeline_id' => $timeline->id]);

    $timeline->user->notify(new TimelineUpdateNotification($update));

    Notification::assertSentTo($timeline->user, TimelineUpdateNotification::class);
});

it('does not send notification to deactivated user', function () {
    Notification::fake();

    $user = User::factory()->create(['status' => 'deactivated']);
    $timeline = Timeline::factory()->for($user)->create();

    // Add update (should check user status)
    // ...

    Notification::assertNotSentTo($user, TimelineUpdateNotification::class);
});
```

## Definition of Done

- [ ] Email sent on new update
- [ ] Arabic template works
- [ ] English template works
- [ ] Uses client's preferred language
- [ ] Link to timeline works
- [ ] Queued for performance
- [ ] No email to deactivated users
- [ ] Tests pass
- [ ] Code formatted with Pint

## Dependencies

- **Story 4.2:** Timeline updates management
- **Epic 8:** Email infrastructure

## Estimation

**Complexity:** Low-Medium
**Estimated Effort:** 2-3 hours