/**
  * Receive Items
  */
 public function receive_items_post()
 {
     $delivery_data = $this->input->post('deliveryData');
     // should be a json object not a string
     if ($delivery_data['transaction'] == Transaction_Type::Deliver_Items) {
         $deliveries_repo = new Deliveries_Repository($this->base_model->get_db_instance());
         $delivery_id = $deliveries_repo->new_delivery($delivery_data);
         if ($delivery_id <= 0) {
             if ($delivery_id == -2) {
                 echo -2;
             } else {
                 if ($delivery_id == -1) {
                     echo -1;
                 } else {
                     if ($delivery_id == 0) {
                         echo 0;
                     }
                 }
             }
             // delivery exists
         } else {
             if ($delivery_id >= 1) {
                 $items_repo = new Items_Repository($this->base_model->get_db_instance());
                 $items = $delivery_data['items'];
                 foreach ($items as $item) {
                     if ($items_repo->item_exists($item['item_id'])) {
                         $item_info = $items_repo->get_item($item['item_id']);
                         $items_repo->update_item(new Item($item_info->id, $item['description'], $item_info->quantity + $item['quantity'], $item['price'], null, null));
                     } else {
                         $items_repo->new_item(new Item($item['item_id'], $item['description'], $item['quantity'], $item['price'], null, null));
                     }
                     $deliveries_repo->new_item(new Delivered_Item(null, $delivery_id, $item['item_id'], $item['quantity']));
                 }
                 echo 2;
                 // valid delivery
             }
         }
     } else {
         echo 1;
         // invalid transaction
     }
 }
 public function new_delivery_post()
 {
     $branch_id = $this->input->post('branchId');
     $items = $this->input->post('items');
     // [ {itemId: 401, quantity: 20}, {itemId: 402, quantity: 10} ]
     $uncleared_items_repo = new Uncleared_Items_Repository($this->base_model->get_db_instance());
     $deliveries_repo = new Deliveries_Repository($this->base_model->get_db_instance());
     $items_repo = new Items_Repository($this->base_model->get_db_instance());
     $delivery_id = $deliveries_repo->new_delivery($branch_id, $items);
     foreach ($items as $item) {
         $item_info = $items_repo->get_item($item['itemId']);
         $items_repo->update_item(new Item($item['itemId'], $item_info->description, $item_info->quantity - $item['quantity'], $item_info->price, null, null));
         if ($uncleared_items_repo->item_exists_via_item_id_and_branch_id($item['itemId'], $branch_id)) {
             $uncleared_item = $uncleared_items_repo->get_item_via_item_id_and_branch_id($item['itemId'], $branch_id);
             $uncleared_items_repo->update_item(new Uncleared_Item($uncleared_item->id, $item['itemId'], $branch_id, $uncleared_item->quantity + $item['quantity'], null, null));
         } else {
             $uncleared_items_repo->new_item(new Uncleared_Item(null, $item['itemId'], $branch_id, $item['quantity'], null, null));
         }
     }
     echo $deliveries_repo->to_delivery_json($delivery_id);
 }