chore: initial commit of existing codebase

app/Models/SupplierInvoice.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class SupplierInvoice extends Model
+{
+    use HasFactory;
+
+    protected $fillable = ['invoice_number', 'supplier_id', 'purchase_order_id', 'goods_receipt_note_id', 'invoice_date', 'due_date', 'subtotal', 'vat_amount', 'total_amount', 'paid_amount', 'status', 'notes'];
+
+    protected $casts = [
+        'invoice_date' => 'date',
+        'due_date' => 'date',
+        'subtotal' => 'decimal:2',
+        'vat_amount' => 'decimal:2',
+        'total_amount' => 'decimal:2',
+        'paid_amount' => 'decimal:2',
+    ];
+
+    public function supplier()
+    {
+        return $this->belongsTo(Supplier::class);
+    }
+
+    public function purchaseOrder()
+    {
+        return $this->belongsTo(PurchaseOrder::class);
+    }
+
+    public function goodsReceiptNote()
+    {
+        return $this->belongsTo(GoodsReceiptNote::class);
+    }
+
+    public function payments()
+    {
+        return $this->hasMany(SupplierPayment::class);
+    }
+
+    public function getOutstandingAttribute()
+    {
+        return $this->total_amount - $this->paid_amount;
+    }
+}