<?php
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namespace app\api\model\plus\bargain;
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use app\api\model\plus\bargain\Product as BargainProductModel;
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use app\api\model\plus\bargain\ProductSku as BargainSkuModel;
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use app\api\model\plus\bargain\Active as ActiveModel;
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use app\api\model\settings\Setting as SettingModel;
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use app\common\exception\BaseException;
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use app\common\model\plus\bargain\Task as TaskModel;
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use app\api\model\plus\bargain\TaskHelp as TaskHelpModel;
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use app\api\service\bargain\Amount as AmountService;
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use app\common\library\helper;
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/**
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* 砍价任务模型
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*/
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class Task extends TaskModel
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{
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/**
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* 隐藏的字段
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* @var array
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*/
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protected $hidden = [
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'peoples',
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'section',
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'is_delete',
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'app_id',
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'update_time',
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];
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/**
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* 我的砍价列表
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*/
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public function getList($user_id, $params)
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{
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// 砍价活动列表
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return $this->where('user_id', '=', $user_id)->with(['file'])
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->where('status', '=', $params['status'])
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->where('is_delete', '=', 0)
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->order(['create_time' => 'desc'])
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->paginate($params);
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}
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/**
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* 获取砍价任务详情
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*/
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public function getTaskDetail($bargain_task_id, $user = false)
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{
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// 砍价任务详情
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$task = static::detail($bargain_task_id, ['user']);
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if (empty($task)) {
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throw new BaseException(['msg' => '砍价任务不存在']);
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}
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// 砍价活动详情
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$active = ActiveModel::detail($task['bargain_activity_id']);
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// 获取商品详情
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$product = BargainProductModel::detail($task['bargain_product_id'], ['product.image.file']);
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// 好友助力榜
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$help_list = TaskHelpModel::getListByTaskId($bargain_task_id);
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// 当前是否为发起人
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$is_creater = $this->isCreater($task, $user);
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// 当前是否已砍
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$is_cut = $this->isCut($help_list, $user);
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// 砍价规则
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$setting = SettingModel::getBargain();
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return compact('task', 'is_creater', 'is_cut', 'active', 'product', 'help_list', 'setting');
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}
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/**
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* 新增砍价任务
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*/
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public function add($user_id, $bargain_activity_id, $bargain_product_id, $bargain_product_sku_id, $product_sku_id)
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{
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// 获取活动详情
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$active = ActiveModel::detail($bargain_activity_id);
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// 获取商品详情
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$product = BargainProductModel::detail($bargain_product_id, ['product.image']);
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// 验证能否创建砍价任务
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if (!$this->onVerify($active, $user_id, $product)) {
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return false;
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}
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// 商品sku信息
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$product_sku = BargainSkuModel::detail($bargain_product_sku_id, ['productSku']);
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// 创建砍价任务
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return $this->addTask($user_id, $active, $product, $product_sku);
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}
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/**
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* 创建砍价任务记录
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*/
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private function addTask($user_id, $active, $product, $product_sku)
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{
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// 分配砍价金额区间
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$section = $this->calcBargainSection(
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$product_sku['product_price'],
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$product_sku['bargain_price'],
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$product_sku['bargain_num']
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);
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// 新增记录
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return $this->save([
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'bargain_activity_id' => $active['bargain_activity_id'],
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'user_id' => $user_id,
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'bargain_product_id' => $product['bargain_product_id'],
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'bargain_product_sku_id' => $product_sku['bargain_product_sku_id'],
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'product_price' => $product_sku['product_price'],
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'bargain_price' => $product_sku['bargain_price'],
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'actual_price' => $product_sku['product_price'],
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'peoples' => $product_sku['bargain_num'],
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'image_id' => $product['product']['image'][0]['image_id'],
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'product_name' => $product['product']['product_name'],
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'product_attr' => $product_sku['product_attr'],
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'product_sku_id' => $product_sku['product_sku_id'],
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'cut_people' => 0,
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'section' => $section,
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'cut_money' => 0.00,
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'end_time' => time() + ($active['together_time'] * 3600),
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'app_id' => self::$app_id,
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]);
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//增加参与人数
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(new BargainProductModel)->where('bargain_product_id', '=', $product['bargain_product_id'])->inc('join_num')->update();
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}
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/**
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* 帮砍一刀
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*/
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public function helpCut($user)
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{
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// 好友助力榜
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$helpList = TaskHelpModel::getListByTaskId($this['bargain_task_id']);
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// 当前是否已砍
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if ($this->isCut($helpList, $user)) {
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$this->error = '您已参与砍价，请不要重复操作';
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return false;
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}
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// 帮砍一刀事件
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return $this->transaction(function () use ($user) {
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return $this->onCutEvent($user['user_id'], $this->isCreater($this, $user));
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});
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}
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/**
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* 砍一刀的金额
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*/
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public function getCutMoney()
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{
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return $this['section'][$this['cut_people']];
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}
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/**
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* 帮砍一刀事件
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*/
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private function onCutEvent($userId, $isCreater = false)
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{
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// 砍价金额
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$cutMoney = $this->getCutMoney();
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// 砍价助力记录
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$model = new TaskHelpModel;
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$model->add($this, $userId, $cutMoney, $isCreater);
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// 实际购买金额
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$actualPrice = helper::bcsub($this['actual_price'], $cutMoney);
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// 更新砍价任务信息
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$this->save([
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'cut_people' => ['inc', 1],
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'cut_money' => ['inc', $cutMoney],
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'actual_price' => $actualPrice,
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'is_floor' => helper::bcequal($actualPrice, $this['bargain_price']),
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'status' => helper::bcequal($actualPrice, $this['bargain_price']) == 0?0:1,
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]);
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return true;
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}
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/**
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* 砍价任务标记为已购买
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*/
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public function setIsBuy()
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{
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return $this->save(['is_buy' => 1]);
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}
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/**
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* 分配砍价金额区间
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*/
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private function calcBargainSection($product_price, $bargain_price, $bargain_num)
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{
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$AmountService = new AmountService(helper::bcsub($product_price, $bargain_price), $bargain_num);
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return $AmountService->handle()['items'];
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}
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/**
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* 当前是否为发起人
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*/
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private function isCreater($task, $user)
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{
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if ($user === false) return false;
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return $user['user_id'] == $task['user_id'];
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}
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/**
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* 当前是否已砍
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*/
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private function isCut($helpList, $user)
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{
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if ($user === false) return false;
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foreach ($helpList as $item) {
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if ($item['user_id'] == $user['user_id']) return true;
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}
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return false;
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}
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/**
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* 验证能否创建砍价任务
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*/
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private function onVerify($active, $userId, $product)
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{
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// 活动是否开始
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if ($active['start_time'] > time()) {
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$this->error = '很抱歉，当前砍价活动未开始';
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return false;
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}
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// 活动是否到期合法
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if ($active['end_time'] < time()) {
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$this->error = '很抱歉，当前砍价活动已结束';
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return false;
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}
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// 是否超过限购
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if ($product['limit_num'] > 0) {
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if ($this->getUserTaskCount($userId, $product['bargain_product_id']) >= $product['limit_num']) {
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$this->error = '已超过限购数量';
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return false;
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}
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}
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return true;
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}
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private function getUserTaskCount($userId, $bargain_product_id)
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{
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return (new self())->where('user_id', '=', $userId)
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->where('bargain_product_id', '=', $bargain_product_id)
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->count();
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}
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}
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