1、优化订单价格计算；2、订单价格区分定金支付和全款支付；3、增加支付配置信息的输出；

app/Http/Controllers/Api/OrderController.php

@@ -22,6 +22,8 @@ use App\Service\OrderStatus as Status;
  */
 class OrderController extends Controller
 {
+	private $earnest = 200; //定金和首款默认金额 TODO 定金支付和首款支付暂定为200
+
 	//订单列表
     public function index(Request $request)
 	{
@@ -59,7 +61,7 @@ class OrderController extends Controller
 					$timeout_ids[] = $v['id'];
 					$v['status'] = Status::CANCEL;
 					$v['status_text'] = '已取消';
-					//TODO 加回库存，未考虑到几天/几个月后再打开订单列表页的情况
+					//TODO 加回库存，未考虑到几天/几个月后再打开订单列表页的情况，需要定时任务处理
 					Product::query()->find($v['product_id'])->update(['stock' => $v['num']]);
 				}
 			}
@@ -82,7 +84,7 @@ class OrderController extends Controller
 			'id' => ['required', 'regex:/^\d+$/'],
 			'name' => ['required', 'between:2,20'],
 			'mobile' => ['required', 'regex:/^1[3-9]\d{9}$/'],
-			'pay_type' => ['required', 'in:0,1,2'],
+			'pay_type' => ['required', 'in:0,1,2,3'],
 			'num' => ['required', 'min:1'],
 		], [
 			'id.required' => '未指定产品ID',
@@ -118,7 +120,7 @@ class OrderController extends Controller
 
 		DB::beginTransaction();
 		try {
-			$price = $this->calc($ap, $formData['num']);
+			$price = $this->calc($ap->price, $ap->coupon, $formData['num'], $formData['pay_type']);
 			$title = $ap->product->title; //产品标题
 			//代理商产品表增加销量
 			// $ap->increment('sale', $formData['num']); TODO 支付成功之后再增加销量
@@ -131,6 +133,7 @@ class OrderController extends Controller
 			// 存入订单表
 			$order = Order::query()->create([
 				'user_id' => $this->user_id,
+				'agent_id' => $this->agent_id,
 				'order_no' => $this->getOrderNo(),
 				'num' => $formData['num'],
 				'price' => $price,
@@ -140,28 +143,27 @@ class OrderController extends Controller
 				'picture' => $ap->product->picture,
 				'agent_product_id' => $ap->id,
 				'product_id' => $ap->product_id,
-				'status' => Status::UNPAID,
+				'status' => $formData['pay_type'] == 3 ? Status::OFFLINE_UNPAID : Status::UNPAID,
 				'pay_type' => $formData['pay_type'],
 				'coupon_id' => join(',', $coupon_ids),
 			]);
 
-			//资金流水
-			UserMoneyLog::query()->create([
-				'user_id' => $this->user_id,
-				'agent_id' => $this->agent_id,
-				'money' => -$price,
-				'order_id' => $order->id,
-				'type' => 1,
-				'desc' => '购买产品：' . $title,
-				'created_at' => time(), //已关闭模型自动写入时间
-			]);
-
 			DB::commit();
 		} catch (\Exception $e) {
 			DB::rollBack();
-			return $e->getMessage();
+			return $this->error($e->getMessage());
+		}
+
+		if ($formData['pay_type'] == 3) { //线下支付
+			return $this->success('操作成功，请及时联系客服线下支付');
+		} else { //在线支付或定金支付
+			$config = $this->payConfig($order->title, $order->order_no, $order->pay_type, $price);
+			if (!empty($config['paySign'])) {
+				return $this->success($config);
+			} else {
+				return $this->error(join(',', $config));
+			}
 		}
-		return $this->success();
 	}
 
 	//申请退款
@@ -199,39 +201,74 @@ class OrderController extends Controller
 		return $this->success();
 	}
 
-	//获取应付金额
+	//获取应付金额及相关产品信息
 	public function getPrice(Request $request)
 	{
-		$id = (int)$request->input('id');
+		$formData = $request->only(['id', 'num', 'pay_type']);
+		$request->validate([
+			'id' => 'required|integer',
+			'num' => 'required|integer',
+			'pay_type' => 'required|integer',
+		], [
+			'*.required' => '参数缺失',
+			'*.integer' => '参数类型错误',
+		]);
 
-		$num = (float)$request->input('num');
-		if (!$num || $num < 1) {
+		if (!$formData['num'] || $formData['num'] < 1) {
 			return $this->error('未指定产品数量');
 		}
 
-		$agent_product = AgentProduct::query()
-			->with('coupon:agent_product_id,type,detail,agent_id,start_at,end_at')
-			->find($id);
-		$final_price = $this->calc($agent_product, $num);
-		return $this->success(['price' => $final_price]);
+		$ap = AgentProduct::query()
+			->with('product:id,title,pictures')
+			->with('coupon:agent_product_id,type,detail,agent_id,tag,start_at,end_at')
+			->find($formData['id'], ['id', 'price', 'original_price', 'product_id']);
+
+		$ap->final_price = $this->calc($ap->price, $ap->coupon, $formData['num'], $formData['pay_type']);
+		$ap->num = $formData['num'];
+		return $this->success($ap);
 	}
 
-	//订单支付
-	public function pay()
+	//订单支付（在订单列表发起）
+	public function pay(Request $request)
 	{
 		$id = (int)request()->input('id');
 
 		//订单信息
-		$order = Order::find($id);
+		$order = Order::query()
+			->with('agentProduct')
+			->where(['user_id' => $this->user_id, 'agent_id' => $this->agent_id])
+			->whereIn('status', [Status::UNPAID, Status::PAY_EARNEST])
+			->find($id);
 		if (!$order) {
-			return $this->error('订单不存在');
+			return $this->error('订单不存在或已支付');
+		}
+		$order = $order->toArray();
+
+		$coupon = Coupon::whereIn('id', $order['coupon_id'])->get();
+
+		//如果已经付定金或首付款，则仅支付尾款
+		if ($order['status'] == Status::PAY_EARNEST) {
+			$price = $order['price'] - $order['paid_money'];
+		} else {
+			$price = $this->calc($order['price'], $coupon, $order['num'], $order['pay_type']);
+		}
+
+		$config = $this->payConfig($order['title'], $order['order_no'], $order['pay_type'], $price);
+		if (!empty($config['paySign'])) {
+			return $this->success($config);
+		} else {
+			return $this->error(join(',', $config));
 		}
+	}
 
+	//获取支付配置信息
+	private function payConfig($title, $order_no, $pay_type, $price)
+	{
 		//用户openid
-		$openid = User::query()->find($this->user_id)->value('openid');
+		$openid = User::query()->where('id', $this->user_id)->value('openid'); //此处要用where，value()用find有BUG
 
 		//代理商信息
-		$agent = Agent::find($this->agent_id);
+		$agent = Agent::query()->find($this->agent_id);
 
 		$config = config('wechat.payment.default');
 		$config = array_merge($config, [
@@ -242,18 +279,20 @@ class OrderController extends Controller
 
 		$app = Factory::payment($config);
 		$result = $app->order->unify([
-			'body' => $order->title,
-			'out_trade_no' => $order->order_no,
-			'total_fee' => $order->price, //TODO 需要区分定金和全款
-			'notify_url' => route('wxpay_notify'), // 支付结果通知网址，如果不设置则会使用配置里的默认地址
+			'body' => $title,
+			'out_trade_no' => $order_no . '-' . $pay_type, //后面加pay_type，主要是为了方便微信支付回调时区分定金(首付款)和尾款支付
+			'total_fee' => round($price * 100), //支付金额单位为分
+			'notify_url' => route('wxpay_notify', ['aid' => $this->agent_id]), // 支付结果通知网址，如果不设置则会使用配置里的默认地址
 			'trade_type' => 'JSAPI',
 			'openid' => $openid,
 		]);
 
-		$jssdk = $app->jssdk;
-		$config = $jssdk->bridgeConfig($result['prepay_id'], false); // 返回数组
+		if (empty($result['prepay_id'])) {
+			return $result;
+		}
 
-		return $this->success($config);
+		$jssdk = $app->jssdk;
+		return $jssdk->bridgeConfig($result['prepay_id'], false); // 返回数组
 	}
 
 	//订单详情
@@ -281,19 +320,32 @@ class OrderController extends Controller
 
 	/**
 	 * 计算最终价格（扣除优惠券之后的价格）
-	 * @param $agent_product
-	 * @param $num
+	 * $price:原价；$coupon:优惠券；$num:产品数量；$pay_type:支付方式
+	 * @param float $price
+	 * @param Coupon $coupon
+	 * @param int $num
+	 * @param int $pay_type
 	 * @return float
 	 */
-	private function calc($agent_product, $num)
+	private function calc($price, $coupon, $num, $pay_type)
 	{
-		$total_price = $agent_product->price * $num;
+		//根据支付方式计算价格
+		switch ($pay_type) {
+			case 1:
+			case 2:
+				return $this->earnest;
+			case 3:
+				return 0;
+		}
+		//TODO 还要计算尾款支付金额
+
+		$total_price = $price * $num;
 		//没有任何优惠券时直接返回最终价
-		if ($agent_product->coupon->isEmpty()) {
+		if ($coupon && $coupon->isEmpty()) {
 			return $total_price;
 		}
 
-		$coupon = $agent_product->coupon->toArray();
+		$coupon = $coupon->toArray();
 		foreach ($coupon as $v) {
 			// TODO 未判断优惠券有效期
 			if ($v['type'] == 1 && !empty($v['detail']['full']) && !empty($v['detail']['reduction'])) { //满减