Enabled changing broadband services and adjusting invoices

app/Http/Requests/ServiceChangeRequest.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace App\Http\Requests;
+
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+
+class ServiceChangeRequest extends FormRequest
+{
+    /**
+     * Determine if the user is authorized to make this request.
+     *
+     * @return bool
+     */
+    public function authorize()
+    {
+		return $this->route('o')->serviceUserAuthorised(Auth::user());
+    }
+
+    /**
+     * Get the validation rules that apply to the request.
+     *
+     * @return array<string, mixed>
+	 * @todo This is specific to broadband - this needs to be more generic.
+     */
+    public function rules(Request $request)
+    {
+		if (! $request->isMethod('post'))
+			return [];
+
+        return [
+            'broadband.product_id' => 'required|exists:products,id',
+			'broadband.change_fee' => 'nullable|numeric',
+			'broadband.start_at' => 'required|date',	// @todo Check that it is not more than 1 billing cycle ago, and not future.
+        ];
+    }
+}