public function addCart(Request $request, $product_id)
{
$m3_result = new M3Result();
$m3_result->status = 0;
$m3_result->message = '添加成功';
// 如果当前已经登录
$member = $request->session()->get('member', '');
if ($member != '') {
$cart_items = CartItem::where('member_id', $member->id)->get();
$exist = false;
foreach ($cart_items as $cart_item) {
if ($cart_item->product_id == $product_id) {
$cart_item->count++;
$cart_item->save();
$exist = true;
break;
}
}
if ($exist == false) {
$cart_item = new CartItem();
$cart_item->product_id = $product_id;
$cart_item->count = 1;
$cart_item->member_id = $member->id;
$cart_item->save();
}
return $m3_result->toJson();
}
$bk_cart = $request->cookie('bk_cart');
$bk_cart_arr = $bk_cart != null ? explode(',', $bk_cart) : array();
$count = 1;
foreach ($bk_cart_arr as &$value) {
// 一定要传引用
$index = strpos($value, ':');
if (substr($value, 0, $index) == $product_id) {
$count = (int) substr($value, $index + 1) + 1;
$value = $product_id . ':' . $count;
break;
}
}
if ($count == 1) {
array_push($bk_cart_arr, $product_id . ':' . $count);
}
return response($m3_result->toJson())->withCookie('bk_cart', implode(',', $bk_cart_arr));
}
private function syncCart($member_id, $bk_cart_arr)
{
$cart_items = CartItem::where('member_id', $member_id)->get();
$cart_items_arr = array();
foreach ($bk_cart_arr as $value) {
$index = strpos($value, ':');
$product_id = substr($value, 0, $index);
$count = (int) substr($value, $index + 1);
// 判断离线购物车中product_id 是否存在 数据库中
$exist = false;
foreach ($cart_items as $temp) {
if ($temp->product_id == $product_id) {
if ($temp->count < $count) {
$temp->count = $count;
$temp->save();
}
$exist = true;
break;
}
}
// 不存在则存储进来
if ($exist == false) {
$cart_item = new CartItem();
$cart_item->member_id = $member_id;
$cart_item->product_id = $product_id;
$cart_item->count = $count;
$cart_item->save();
$cart_item->product = Product::find($cart_item->product_id);
array_push($cart_items_arr, $cart_item);
}
}
// 为每个对象附加产品对象便于显示
foreach ($cart_items as $cart_item) {
$cart_item->product = Product::find($cart_item->product_id);
array_push($cart_items_arr, $cart_item);
}
return $cart_items_arr;
}
