chore: initial commit of existing codebase

app/Services/RfqInvitationService.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Services;
+
+use App\Mail\RfqInvitationMail;
+use App\Models\PurchaseRequest;
+use App\Models\RfqInvitation;
+use App\Models\Supplier;
+use Illuminate\Support\Facades\Mail;
+
+class RfqInvitationService
+{
+    public function select(PurchaseRequest $purchaseRequest, Supplier $supplier, string $channel, array $itemIds = []): RfqInvitation
+    {
+        return RfqInvitation::create([
+            'purchase_request_id' => $purchaseRequest->id,
+            'supplier_id'         => $supplier->id,
+            'token'               => bin2hex(random_bytes(32)),
+            'channel'             => $channel,
+            'expires_at'          => now()->addDays(14),
+            'status'              => 'pending',
+            'item_ids'            => empty($itemIds) ? null : $itemIds,
+        ]);
+    }
+
+    public function sendInvitation(RfqInvitation $invitation): void
+    {
+        $invitation->update(['status' => 'sent', 'sent_at' => now()]);
+
+        $supplier = $invitation->supplier;
+        if (in_array($invitation->channel, ['email', 'both']) && $supplier->email) {
+            try {
+                Mail::to($supplier->email)->send(new RfqInvitationMail($invitation));
+            } catch (\Exception $e) {
+                // Mail failure should not block flow
+            }
+        }
+    }
+
+    public function invite(PurchaseRequest $purchaseRequest, Supplier $supplier, string $channel): RfqInvitation
+    {
+        $invitation = $this->select($purchaseRequest, $supplier, $channel);
+        $this->sendInvitation($invitation);
+        return $invitation;
+    }
+
+    public function whatsappLink(RfqInvitation $invitation): string
+    {
+        $url   = route('rfq.show', $invitation->token);
+        $text  = "Hello {$invitation->supplier->name},\n\n"
+               . "You are invited to submit a quote for purchase request {$invitation->purchaseRequest->request_number}.\n\n"
+               . "Please click the link below to submit your quote:\n{$url}\n\n"
+               . "This link expires in 7 days and can only be used once.";
+        $phone = preg_replace('/\D/', '', $invitation->supplier->phone ?? '');
+        return 'https://wa.me/' . $phone . '?text=' . rawurlencode($text);
+    }
+}