reconstruction of the project
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<?php
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namespace App\Controllers\View;
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use App\Controllers\BaseController;
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use App\Models\PurchaseOrderModel;
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use App\Models\PurchaseOrderItemModel;
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use App\Models\SupplierModel;
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use App\Models\SupplyModel;
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use App\Models\SupplyTransactionModel;
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class PurchaseOrderController extends BaseController
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{
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protected $poModel;
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protected $itemModel;
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protected $supplierModel;
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protected $supplyModel;
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protected $txnModel;
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protected $db;
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public function __construct()
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{
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$this->poModel = new PurchaseOrderModel();
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$this->itemModel = new PurchaseOrderItemModel();
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$this->supplierModel = new SupplierModel();
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$this->supplyModel = new SupplyModel();
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$this->txnModel = new SupplyTransactionModel();
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$this->db = \Config\Database::connect();
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}
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public function index()
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{
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$q = trim($this->request->getGet('q') ?? '');
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$builder = $this->poModel->select('purchase_orders.*, suppliers.name AS supplier_name')
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->join('suppliers', 'suppliers.id = purchase_orders.supplier_id', 'left');
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if ($q !== '') {
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$builder->groupStart()
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->like('po_number', $q)
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->orLike('suppliers.name', $q)
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->groupEnd();
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}
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$orders = $builder->orderBy('purchase_orders.created_at', 'DESC')->paginate(20);
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return view('inventory/po_index', [
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'orders' => $orders,
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'pager' => $this->poModel->pager,
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'q' => $q,
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]);
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}
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public function create()
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{
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return view('inventory/po_form', [
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'title' => 'Create Purchase Order',
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'action' => site_url('inventory/po/store'),
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'suppliers' => $this->supplierModel->orderBy('name')->findAll(),
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'supplies' => $this->supplyModel->orderBy('name')->findAll(),
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]);
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}
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public function store()
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{
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$po = $this->request->getPost([
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'po_number','supplier_id','order_date','expected_date','notes'
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]);
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$status = $this->request->getPost('status') ?? 'ordered';
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$supply_ids = $this->request->getPost('item_supply_id') ?? [];
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$descs = $this->request->getPost('item_description') ?? [];
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$qtys = $this->request->getPost('item_quantity') ?? [];
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$unit_costs = $this->request->getPost('item_unit_cost') ?? [];
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if (empty($supply_ids)) {
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return redirect()->back()->withInput()->with('error', 'Add at least one line item.');
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}
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// compute totals
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$subtotal = 0.0;
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$items = [];
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foreach ($supply_ids as $i => $sid) {
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$q = max(0, (int)($qtys[$i] ?? 0));
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$uc = (float)($unit_costs[$i] ?? 0);
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if ($sid && $q > 0) {
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$line = $q * $uc;
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$subtotal += $line;
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$items[] = [
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'supply_id' => (int)$sid,
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'description' => trim($descs[$i] ?? ''),
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'quantity' => $q,
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'unit_cost' => $uc,
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'received_qty'=> 0,
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];
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}
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}
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if (!$items) {
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return redirect()->back()->withInput()->with('error', 'Valid line items required.');
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}
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$tax = 0.00;
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$total = $subtotal + $tax;
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$this->db->transStart();
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$po['status'] = in_array($status, ['draft','ordered'], true) ? $status : 'ordered';
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$po['subtotal'] = $subtotal;
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$po['tax'] = $tax;
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$po['total'] = $total;
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if (!$this->poModel->save($po)) {
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$this->db->transRollback();
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return redirect()->back()->withInput()->with('error', implode("\n", $this->poModel->errors()));
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}
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$poId = $this->poModel->getInsertID();
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foreach ($items as $it) {
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$it['purchase_order_id'] = $poId;
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if (!$this->itemModel->insert($it)) {
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$this->db->transRollback();
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return redirect()->back()->withInput()->with('error', 'Failed to save line items.');
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}
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}
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$this->db->transComplete();
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if ($this->db->transStatus() === false) {
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return redirect()->back()->withInput()->with('error', 'Failed to save purchase order.');
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}
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return redirect()->to(site_url('inventory/po/show/'.$poId))->with('success', 'PO created.');
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}
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public function show($id)
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{
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$po = $this->poModel->select('purchase_orders.*, suppliers.name AS supplier_name')
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->join('suppliers', 'suppliers.id = purchase_orders.supplier_id', 'left')
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->find($id);
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if (!$po) return redirect()->to('inventory/po')->with('error', 'PO not found.');
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$items = $this->itemModel->select('purchase_order_items.*, supplies.name AS supply_name, supplies.unit as supply_unit')
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->join('supplies', 'supplies.id = purchase_order_items.supply_id', 'left')
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->where('purchase_order_id', $id)->findAll();
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return view('inventory/po_show', [
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'po' => $po,
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'items' => $items,
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]);
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}
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/**
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* Receive items (partial or full)
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* POST body: received[item_id] = qty_to_receive
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*/
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public function receive($id)
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{
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$po = $this->poModel->find($id);
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if (!$po || in_array($po['status'], ['canceled','received'], true)) {
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return redirect()->to('inventory/po/show/'.$id)->with('error', 'PO not receivable.');
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}
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$received = $this->request->getPost('received') ?? []; // [itemId => qty]
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if (!$received) {
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return redirect()->to('inventory/po/show/'.$id)->with('error', 'No items to receive.');
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}
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$issuedBy = (string) (session('user.email') ?? session('user.username') ?? 'system');
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$this->db->transStart();
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$completed = true;
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foreach ($received as $itemId => $qty) {
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$qty = (int)$qty;
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if ($qty <= 0) continue;
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$item = $this->itemModel->where('purchase_order_id', $id)->find($itemId);
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if (!$item) { $completed = false; continue; }
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$remaining = (int)$item['quantity'] - (int)$item['received_qty'];
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$toReceive = min($remaining, $qty);
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if ($toReceive <= 0) continue;
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// Update item received qty
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$this->itemModel->update($itemId, [
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'received_qty' => (int)$item['received_qty'] + $toReceive
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]);
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// Update supply on hand
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$supply = $this->supplyModel->find($item['supply_id']);
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if (!$supply) { $completed = false; continue; }
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$newQty = (int)$supply['qty_on_hand'] + $toReceive;
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$this->supplyModel->update($supply['id'], ['qty_on_hand' => $newQty]);
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// Log transaction IN
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$this->txnModel->insert([
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'supply_id' => $supply['id'],
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'type' => 'in',
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'quantity' => $toReceive,
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'ref' => 'PO ' . $po['po_number'],
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'issued_to' => 'Inventory',
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'issued_by' => $issuedBy,
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'notes' => 'Received against PO',
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]);
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if (($item['received_qty'] + $toReceive) < $item['quantity']) {
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$completed = false;
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}
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}
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// Set PO status
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$this->poModel->update($id, ['status' => $completed ? 'received' : 'ordered']);
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$this->db->transComplete();
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if ($this->db->transStatus() === false) {
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return redirect()->to('inventory/po/show/'.$id)->with('error', 'Failed to receive items.');
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}
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return redirect()->to('inventory/po/show/'.$id)->with('success', $completed ? 'PO fully received.' : 'PO partially received.');
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}
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public function cancel($id)
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{
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$po = $this->poModel->find($id);
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if (!$po || $po['status'] === 'received') {
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return redirect()->to('inventory/po/show/'.$id)->with('error', 'Cannot cancel this PO.');
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}
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$this->poModel->update($id, ['status' => 'canceled']);
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return redirect()->to('inventory/po/show/'.$id)->with('success', 'PO canceled.');
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}
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}
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