Add all files

app/Models/Order.php

@@ -0,0 +1,75 @@
+<?php
+
+namespace App\Models;
+
+use App\Classes\Price;
+use App\Observers\OrderObserver;
+use Illuminate\Database\Eloquent\Attributes\ObservedBy;
+use Illuminate\Database\Eloquent\Casts\Attribute;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+#[ObservedBy([OrderObserver::class])]
+class Order extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['user_id', 'currency_code'];
+
+    public bool $send_create_email = true;
+
+    public function user()
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function services()
+    {
+        return $this->hasMany(Service::class);
+    }
+
+    /**
+     * Get the currency corresponding to the service.
+     */
+    public function currency()
+    {
+        return $this->hasOne(Currency::class, 'code', 'currency_code');
+    }
+
+    /**
+     * Total of the order.
+     *
+     * @return float
+     */
+    public function total(): Attribute
+    {
+        return Attribute::make(
+            get: fn () => $this->services->sum(fn ($service) => $service->price * $service->quantity)
+        );
+    }
+
+    /**
+     * Total of the order.
+     *
+     * @return string
+     */
+    public function formattedTotal(): Attribute
+    {
+        return Attribute::make(
+            get: fn () => new Price(['price' => $this->total, 'currency' => $this->currency])
+        );
+    }
+
+    /**
+     * Get all invoices for the order.
+     */
+    public function invoices(): Attribute
+    {
+        // Each service has invoices (it is a hasManyThrough relationship order -> service -> invoiceItem -> invoice)
+        $invoicesId = $this->services->map(fn ($service) => $service->invoiceItems->map(fn ($invoiceItem) => $invoiceItem->invoice_id))->flatten();
+
+        return new Attribute(
+            get: fn () => Invoice::whereIn('id', $invoicesId)
+        );
+    }
+}