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@@ -9,6 +9,9 @@ class LessonStudentService extends CrudService {
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constructor(ctx) {
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super(ctx, 'lessonstudent');
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this.model = this.ctx.model.Business.LessonStudent;
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+ this.rscModel = this.ctx.model.Relation.RelationStudentCoach;
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+ this.lessonCoachModel = this.ctx.model.Business.LessonCoach;
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+ this.lessonModel = this.ctx.model.Business.Lesson;
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}
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async beforeCreate(body) {
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@@ -27,8 +30,66 @@ class LessonStudentService extends CrudService {
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const num = await this.model.count({ student_id, is_try: '1' });
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if (num > 0) throw new BusinessError(ErrorCode.SERVICE_FAULT, '您已使用过免费试听的机会');
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}
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+
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+ body = await this.toComputedMoney(body);
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return body;
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}
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+
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+
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+ async reComputed({ id }) {
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+ let data = await this.model.findById(id);
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+ if (!data) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到数据');
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+ data = JSON.parse(JSON.stringify(data));
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+ data = await this.toComputedMoney(data);
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+ await this.model.updateOne({ _id: id }, data);
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+ return await this.model.findById(id);
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+ }
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+
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+ // 计算价格
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+ async toComputedMoney(data) {
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+ const { lesson_id, student_id } = data;
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+ // 通过课程id找到该课的所有教练
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+ const lesson = await this.lessonModel.findById(lesson_id);
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+ if (!lesson) return data;
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+ const lessonMoney = _.get(lesson, 'money');
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+ const lessonType = _.get(lesson, 'type');
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+ if (!lessonMoney) throw new BusinessError(ErrorCode.DATA_INVALID, '课程设置错误,缺少教练费');
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+ // lesson中的money: 是学生应缴费用;
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+ // lessonStudent中的money:是学生应缴费用(公开课不计算,私教课需要查下有没有教师的优惠);
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+ // lessonCoach中的money: 是教师公开课每人应收的费用
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+ // 学生应缴计算方式: 公开课:lesson中的money; 私教课 lesson中的money - 和该教练的优惠 (可以没有)
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+ // 教练应收计算方式: 公开课: lessonCoach中设置的单价*人数; 私教课: (lesson的money - 对该学生的优惠) 之和
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+ if (lessonType === '0') {
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+ // 公开课
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+ data.money = lessonMoney;
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+ } else {
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+ // 找教练和学生的设置
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+ // 虽然用find,但实际上只有一个教练,但凡有2个,就应该不是私教课了
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+ const lessonCoachs = await this.lessonCoachModel.find({ lesson_id });
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+ if (lessonCoachs.length <= 0) return data;
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+ const coach_ids = lessonCoachs.map(i => i.coach_id);
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+ const rsc = await this.rscModel.findOne({ coach_id: coach_ids, student_id });
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+ if (rsc) {
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+ const discountType = _.get(rsc, 'config.discount_type'); // fixed;subtract;discount
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+ const number = _.get(rsc, 'config.number');
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+ if (discountType && number) {
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+ // 优惠目前设置3种: 固定金额; ${num}(num>1):减num元; x折; 打x折(money * (x/100))
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+ if (discountType === 'fixed') {
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+ // 固定金额
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+ data.money = number >= 0 ? number : 0;
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+ } else if (discountType === 'subtract') {
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+ data.money = lessonMoney - number >= 0 ? lessonMoney - number : 0;
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+ } else if (discountType === 'discount') {
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+ console.log(_.divide(number, 100));
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+ data.money = _.round(_.multiply(lessonMoney, _.divide(number, 10)), 2);
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+ }
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+ data.config = _.get(rsc, 'config');
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+ }
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+ }
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+ }
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+
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+ return data;
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+ }
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}
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module.exports = LessonStudentService;
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