谁能帮我挨个解读这个php语言编的代码什么意思？
class Food extends Api
{
public function index()
{
$urlFix = function ($url) {
if (preg_match('/^https?:\/\//', $url)) {
return $url;
} elseif ($url[0] === '/') {
return $this->request->domain() . $url;
} else {
return $this->request->domain() . '/' .substr($url, 1);
}
};
$img_swiper = json_decode(Setting::get('img_swiper'), true);
foreach ($img_swiper as $k => $v) {
$img_swiper[$k] = $urlFix($v);
}
$img_ad = $urlFix(Setting::get('img_ad'));
$img_category = json_decode(Setting::get('img_category'), true);
foreach ($img_category as $k => $v) {
$img_category[$k] = $urlFix($v);
}
return json([
'img_swiper' => $img_swiper,
'img_ad' => $img_ad,
'img_category' => $img_category
]);
}
public function list2()
{
$url = $this->request->domain() . '/static/uploads/';
$category = CategoryModel::field('id,name')->order('sort', 'asc')->select()->toArray();
$food = FoodModel::field('id,category_id,name,price,image_url')->where('status', '1')->order('id', 'asc')->select()->toArray();
foreach ($food as $k => $v) {
$food[$k]['image_url'] = $url . $v['image_url'];
}
$data = [];
foreach ($category as $k => $v) {
$data[$k] = array_merge($v, ['food' => []]);
foreach ($food as $kk => $vv) {
if ($v['id'] === $vv['category_id']) {
$data[$k]['food'][$kk] = $vv;
}
}
}
return json([
'list' => $data,
'promotion' => json_decode(Setting::get('promotion'), true)
]);
}
public function order()
{
if ($this->request->isPost()) {
if ($this->request->post('id/d', 0)) {
return $this->commentOrder();
}
return $this->createOrder();
}
$id = $this->request->get('id/d', 0);
$order = OrderModel::get($id, 'OrderFood');
if (!$order || $order->user_id . '' !== $this->user['id'] . '') {
$this->error('订单不存在');
}
$order['sn'] = $this->sn($order->id);
$order['code'] = $this->code($order->id);
$order['is_taken'] = (bool)$order['is_taken'];
$order['is_pay'] = (bool)$order['is_pay'];
$url = $this->request->domain() . '/static/uploads/';
foreach ($order['order_food'] as $k => $v) {
$food = FoodModel::field('name,image_url')->where(['id' => $v['food_id'], 'status' => '1'])->find();
if (!$food) {
continue;
}
$order['order_food'][$k]['image_url'] = $url . $food['image_url'];
$order['order_food'][$k]['name'] = $food['name'];
}
return json($order);
}
public function pay()
{
$id = $this->request->post('id/d', 0);
$order = OrderModel::get($id);
if ($order && !$order->is_pay) {
$order->is_pay = 1;
$order->pay_time = date('Y-m-d H:i:s');
$order->save();
UserModel::where('id', $this->user['id'])->inc('price', $order->price)->update();
$this->success('支付成功');
}
$this->error('支付失败');
}
public function orderlist()
{
$last_id = $this->request->get('last_id/d', 0);
$row = min(max($this->request->get('row/d', 1), 1), 99);
$order = OrderModel::where(['user_id' => $this->user['id'], 'is_pay' => 1]);
if ($last_id) {
$order->where('id', '<', $last_id);
}
$list = $order->order('id', 'desc')->limit($row)->select();
$last_id = 0;
if (!$list->isEmpty()) {
$last_id = $list[count($list) - 1]['id'];
}
foreach ($list as $k => $v) {
$food_id = OrderFoodModel::where('order_id', $v['id'])->limit(1)->value('food_id');
$list[$k]['first_food_name'] = FoodModel::where('id', $food_id)->value('name');
$list[$k]['is_taken'] = (bool)$list[$k]['is_taken'];
$list[$k]['is_pay'] = (bool)$list[$k]['is_pay'];
}
return json(['list' => $list, 'last_id' => $last_id]);
}
public function record()
{
$list = OrderModel::field('id,price,pay_time')->where(['user_id' => $this->user['id'], 'is_pay' => 1])->order('id', 'desc')->select();
return json(['list' => $list]);
}
protected function commentOrder()
{
$id = $this->request->post('id/d', 0);
$comment = $this->request->post('comment/s', '', 'trim');
$order = OrderModel::get($id);
if ($order && !$order->is_pay) {
$order->comment = $comment;
$order->save();
$this->success('订单备注添加成功');
}
$this->error('订单备注添加失败');
}
protected function createOrder()
{
$order = $this->request->post('order/a', []);
$comment = $this->request->post('comment/s', '', 'trim');
$food_ids = [];
foreach ($order as $v) {
$food_ids[(int)$v['id']] = (int)$v['number'];
}
$price = 0;
$number = 0;
$order_food = [];
$food_data = FoodModel::field('id,category_id,name,price,image_url')->where('id', 'in', array_keys($food_ids))->where('status', '1')->select()->toArray();
foreach ($food_data as $v) {
$order_food[$v['id']] = [
'food_id' => $v['id'],
'number' => $food_ids[$v['id']],
'price' => $v['price']
];
$price += $v['price'] * $order_food[$v['id']]['number'];
$number += $order_food[$v['id']]['number'];
}
$promotion = json_decode(Setting::get('promotion'), true);
$promotion_price = 0;
$promotion_diff = 0;
foreach ($promotion as $v) {
$promotion_diff2 = $price - $v['k'];
if ($promotion_diff2 > 0 && $promotion_diff2 > $promotion_diff) {
$promotion_price = $v['v'];
} else {
$promotion_diff = $promotion_diff2;
}
}
$order = [
'user_id' => $this->user['id'],
'price' => $price - $promotion_price,
'promotion' => $promotion_price,
'number' => $number,
'comment' => $comment,
'create_time' => date('Y-m-d H:i:s')
];
$order = OrderModel::create($order);
foreach ($order_food as $k => $v) {
$order_food[$k]['order_id'] = $order->id;
}
OrderModel::get($order->id)->orderFood()->saveAll($order_food);
return json(['order_id' => $order->id]);
}
protected function sn($id)
{
return 'WX' . str_pad($id, 14, '0', STR_PAD_LEFT);
}
protected function code($id)
{
return 'A' . str_pad($id, 2, '0', STR_PAD_LEFT);
}
}
