feat(purchases): fresh purchases implementation

app/Domains/Purchases/Http/Requests/ExpenseCategoryRequest.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace App\Domains\Purchases\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+
+class ExpenseCategoryRequest extends FormRequest
+{
+    /**
+     * Gatekeeping happens in the controller, so let every caller through here.
+     */
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    /**
+     * Rules for creating or editing an expense category.
+     */
+    public function rules(): array
+    {
+        return [
+            'name' => ['required'],
+            'description' => ['nullable'],
+        ];
+    }
+
+    public function getExpenseCategoryPayload()
+    {
+        return array_merge($this->validated(), [
+            'company_id' => $this->header('company'),
+        ]);
+    }
+}