add payment option

app/Models/Booking.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Booking extends Model
+{
+    use HasFactory;
+    use SoftDeletes;
+
+    protected $fillable = [
+        'account_id',
+        'payment_id',
+        'amount_cents',
+        'type',
+        'description',
+        'booked_at',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'booked_at' => 'datetime',
+            'amount_cents' => 'integer',
+        ];
+    }
+
+    public function account(): BelongsTo
+    {
+        return $this->belongsTo(Account::class);
+    }
+
+    public function payment(): BelongsTo
+    {
+        return $this->belongsTo(Payment::class);
+    }
+
+    protected static function booted(): void
+    {
+        static::created(function (Booking $booking): void {
+            $booking->applyToAccountBalance(+1);
+        });
+
+        static::deleted(function (Booking $booking): void {
+            // Soft delete should revert the effect on balance
+            $booking->applyToAccountBalance(-1);
+        });
+
+        static::restored(function (Booking $booking): void {
+            // Re-apply when restored
+            $booking->applyToAccountBalance(+1);
+        });
+    }
+
+    /**
+     * Apply or revert the booking effect on account balance.
+     *
+     * @param  int  $multiplier  +1 to apply, -1 to revert
+     */
+    protected function applyToAccountBalance(int $multiplier = 1): void
+    {
+        $account = $this->account;
+        if (! $account) {
+            return;
+        }
+
+        $delta = ($this->amount_cents / 100.0);
+        if ($this->type === 'credit') {
+            // Credit decreases the receivable (balance goes down)
+            $delta = -$delta;
+        }
+        // Debit increases receivable (balance up), credit decreases
+        $account->forceFill([
+            'balance_amount' => (float) ($account->balance_amount ?? 0) + ($multiplier * $delta),
+        ])->save();
+    }
+}