支付类项目

from django.db import models
from django.contrib.contenttypes.models import ContentType
from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
from django.db.models import Q




class CourseCategory(models.Model):
    """课程大类, e.g 前端  后端..."""
    name = models.CharField(max_length=64, unique=True)

    def __str__(self):
        return "%s" % self.name

    class Meta:
        verbose_name = "课程大类"
        verbose_name_plural = "课程大类"


class CourseSubCategory(models.Model):
    """课程子类, e.g python linux """
    category = models.ForeignKey("CourseCategory")
    name = models.CharField(max_length=64, unique=True)

    def __str__(self):
        return "%s" % self.name

    class Meta:
        verbose_name = "课程子类"
        verbose_name_plural = "课程子类"


class DegreeCourse(models.Model):
    """学位课程"""
    name = models.CharField(max_length=128, unique=True)
    course_img = models.CharField(max_length=255, verbose_name="缩略图")
    brief = models.TextField(verbose_name="学位课程简介", )
    total_scholarship = models.PositiveIntegerField(verbose_name="总奖学金(贝里)", default=40000)
    mentor_compensation_bonus = models.PositiveIntegerField(verbose_name="本课程的导师辅导费用(贝里)", default=15000)
    # 忽略,用于GenericForeignKey反向查询， 不会生成表字段，切勿删除
    coupon = GenericRelation("Coupon")

    # 为了计算学位奖学金
    period = models.PositiveIntegerField(verbose_name="建议学习周期(days)", default=150)
    prerequisite = models.TextField(verbose_name="课程先修要求", max_length=1024)
    teachers = models.ManyToManyField("Teacher", verbose_name="课程讲师")

    # 忽略，用于GenericForeignKey反向查询，不会生成表字段，切勿删除
    degreecourse_price_policy = GenericRelation("PricePolicy")

    def __str__(self):
        return self.name


class Scholarship(models.Model):
    """学位课程奖学金"""
    degree_course = models.ForeignKey("DegreeCourse")
    time_percent = models.PositiveSmallIntegerField(verbose_name="奖励档位(时间百分比)", help_text="只填百分值，如80,代表80%")
    value = models.PositiveIntegerField(verbose_name="奖学金数额")

    def __str__(self):
        return "%s:%s" % (self.degree_course, self.value)



class Course(models.Model):
    """课程"""
    name = models.CharField(max_length=128, unique=True)
    course_img = models.CharField(max_length=255)
    sub_category = models.ForeignKey("CourseSubCategory")

    course_type_choices = ((0, ‘付费‘), (1, ‘VIP专享‘), (2, ‘学位课程‘))
    course_type = models.SmallIntegerField(choices=course_type_choices)
    degree_course = models.ForeignKey("DegreeCourse", blank=True, null=True, help_text="若是学位课程，此处关联学位表")

    brief = models.TextField(verbose_name="课程概述", max_length=2048)
    level_choices = ((0, ‘初级‘), (1, ‘中级‘), (2, ‘高级‘))
    level = models.SmallIntegerField(choices=level_choices, default=1)
    pub_date = models.DateField(verbose_name="发布日期", blank=True, null=True)
    period = models.PositiveIntegerField(verbose_name="建议学习周期(days)", default=7)
    order = models.IntegerField("课程顺序", help_text="从上一个课程数字往后排")
    attachment_path = models.CharField(max_length=128, verbose_name="课件路径", blank=True, null=True)
    status_choices = ((0, ‘上线‘), (1, ‘下线‘), (2, ‘预上线‘))
    status = models.SmallIntegerField(choices=status_choices, default=0)
    template_id = models.SmallIntegerField("前端模板id", default=1)

    coupon = GenericRelation("Coupon")

    # 用于GenericForeignKey反向查询，不会生成表字段，切勿删除
    price_policy = GenericRelation("PricePolicy")

    def __str__(self):
        return "%s(%s)" % (self.name, self.get_course_type_display())

    def save(self, *args, **kwargs):
        if self.course_type == 2:
            if not self.degree_course:
                raise ValueError("学位课程必须关联对应的学位表")
        super(Course, self).save(*args, **kwargs)


class PricePolicy(models.Model):
    """价格与有课程效期表"""
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey(‘content_type‘, ‘object_id‘)

    valid_period_choices = ((1, ‘1天‘), (3, ‘3天‘),
                            (7, ‘1周‘), (14, ‘2周‘),
                            (30, ‘1个月‘),
                            (60, ‘2个月‘),
                            (90, ‘3个月‘),
                            (180, ‘6个月‘), (210, ‘12个月‘),
                            (540, ‘18个月‘), (720, ‘24个月‘),
                            )
    valid_period = models.SmallIntegerField(choices=valid_period_choices)
    price = models.FloatField()

    class Meta:
        unique_together = ("content_type", ‘object_id‘, "valid_period")

    def __str__(self):
        return "%s(%s)%s" % (self.content_object, self.get_valid_period_display(), self.price)



class CourseDetail(models.Model):
    """课程详情页内容"""
    course = models.OneToOneField("Course")
    hours = models.IntegerField("课时")
    course_slogan = models.CharField(max_length=125, blank=True, null=True)
    video_brief_link = models.CharField(verbose_name=‘课程介绍‘, max_length=255, blank=True, null=True)
    why_study = models.TextField(verbose_name="为什么学习这门课程")
    what_to_study_brief = models.TextField(verbose_name="我将学到哪些内容")
    career_improvement = models.TextField(verbose_name="此项目如何有助于我的职业生涯")
    prerequisite = models.TextField(verbose_name="课程先修要求", max_length=1024)
    recommend_courses = models.ManyToManyField("Course", related_name="recommend_by", blank=True)
    teachers = models.ManyToManyField("Teacher", verbose_name="课程讲师")

    def __str__(self):
        return "%s" % self.course


class OftenAskedQuestion(models.Model):
    """常见问题"""
    content_type = models.ForeignKey(ContentType,limit_choices_to={‘model__contains‘: ‘course‘})  # 关联course or degree_course
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey(‘content_type‘, ‘object_id‘)

    question = models.CharField(max_length=255)
    answer = models.TextField(max_length=1024)

    def __str__(self):
        return "%s-%s" % (self.content_object, self.question)

    class Meta:
        unique_together = (‘content_type‘, ‘object_id‘, ‘question‘)


class CourseOutline(models.Model):
    """课程大纲"""
    course_detail = models.ForeignKey("CourseDetail")
    title = models.CharField(max_length=128)
    # 前端显示顺序
    order = models.PositiveSmallIntegerField(default=1)

    content = models.TextField("内容", max_length=2048)

    def __str__(self):
        return "%s" % self.title

    class Meta:
        unique_together = (‘course_detail‘, ‘title‘)


class CourseChapter(models.Model):
    """课程章节"""
    course = models.ForeignKey("Course", related_name=‘coursechapters‘)
    chapter = models.SmallIntegerField(verbose_name="第几章", default=1)
    name = models.CharField(max_length=128)
    summary = models.TextField(verbose_name="章节介绍", blank=True, null=True)
    pub_date = models.DateField(verbose_name="发布日期", auto_now_add=True)

    class Meta:
        unique_together = ("course", ‘chapter‘)

    def __str__(self):
        return "%s:(第%s章)%s" % (self.course, self.chapter, self.name)


class CourseSection(models.Model):
    """课时目录"""
    chapter = models.ForeignKey("CourseChapter", related_name=‘coursesections‘)
    name = models.CharField(max_length=128)
    order = models.PositiveSmallIntegerField(verbose_name="课时排序", help_text="建议每个课时之间空1至2个值，以备后续插入课时")
    section_type_choices = ((0, ‘文档‘), (1, ‘练习‘), (2, ‘视频‘))
    section_type = models.SmallIntegerField(default=2, choices=section_type_choices)
    # vid: cc视频，唯一标识：Dfadljfosdfjlsdfjs
    section_link = models.CharField(max_length=255, blank=True, null=True, help_text="若是video，填vid,若是文档，填link")

    video_time = models.CharField(verbose_name="视频时长", blank=True, null=True, max_length=32)  # 仅在前端展示使用


    pub_date = models.DateTimeField(verbose_name="发布时间", auto_now_add=True)
    free_trail = models.BooleanField("是否可试看", default=False)


    class Meta:
        unique_together = (‘chapter‘, ‘section_link‘)


    def __str__(self):
        return "%s-%s" % (self.chapter, self.name)

class Homework(models.Model):
    chapter = models.ForeignKey("CourseChapter")
    title = models.CharField(max_length=128, verbose_name="作业题目")
    order = models.PositiveSmallIntegerField("作业顺序", help_text="同一课程的每个作业之前的order值间隔1-2个数")
    homework_type_choices = ((0, ‘作业‘), (1, ‘模块通关考核‘))
    homework_type = models.SmallIntegerField(choices=homework_type_choices, default=0)
    requirement = models.TextField(max_length=1024, verbose_name="作业需求")
    threshold = models.TextField(max_length=1024, verbose_name="踩分点")
    recommend_period = models.PositiveSmallIntegerField("推荐完成周期(天)", default=7)
    scholarship_value = models.PositiveSmallIntegerField("为该作业分配的奖学金(贝里)")
    note = models.TextField(blank=True, null=True)
    enabled = models.BooleanField(default=True, help_text="本作业如果后期不需要了，不想让学员看到，可以设置为False")

    class Meta:
        unique_together = ("chapter", "title")

    def __str__(self):
        return "%s - %s" % (self.chapter, self.title)

class Teacher(models.Model):
    """讲师、导师表"""
    name = models.CharField(max_length=32)
    role_choices = ((0, ‘讲师‘), (1, ‘导师‘))
    role = models.SmallIntegerField(choices=role_choices, default=0)
    title = models.CharField(max_length=64, verbose_name="职位、职称")
    signature = models.CharField(max_length=255, help_text="导师签名", blank=True, null=True)
    image = models.CharField(max_length=128)
    brief = models.TextField(max_length=1024)

    def __str__(self):
        return self.name

# 普通课购买课程后，我的订单中去评价。
class CourseReview(models.Model):
    """课程评价"""
    enrolled_course = models.OneToOneField("EnrolledCourse")
    about_teacher = models.FloatField(default=0, verbose_name="讲师讲解是否清晰")
    about_video = models.FloatField(default=0, verbose_name="内容实用")
    about_course = models.FloatField(default=0, verbose_name="课程内容通俗易懂")
    review = models.TextField(max_length=1024, verbose_name="评价")
    disagree_number = models.IntegerField(default=0, verbose_name="踩")
    agree_number = models.IntegerField(default=0, verbose_name="赞同数")
    date = models.DateTimeField(auto_now_add=True, verbose_name="评价日期")
    is_recommend = models.BooleanField("热评推荐", default=False)
    hide = models.BooleanField("不在前端页面显示此条评价", default=False)

    def __str__(self):
        return "%s-%s" % (self.enrolled_course.course, self.review)

# 学位课购买课程后，我的订单中去天报名表，然后就编程去学习（以后去评价）。
class DegreeCourseReview(models.Model):
    """学位课程评价
    为了以后可以定制单独的评价内容，所以不与普通课程的评价混在一起，单独建表
    """
    enrolled_course = models.ForeignKey("EnrolledDegreeCourse")
    course = models.ForeignKey("Course", verbose_name="评价学位模块", blank=True, null=True,
                               help_text="不填写即代表评价整个学位课程", limit_choices_to={‘course_type‘: 2})
    about_teacher = models.FloatField(default=0, verbose_name="讲师讲解是否清晰")
    about_video = models.FloatField(default=0, verbose_name="视频质量")
    about_course = models.FloatField(default=0, verbose_name="课程")
    review = models.TextField(max_length=1024, verbose_name="评价")
    disagree_number = models.IntegerField(default=0, verbose_name="踩")
    agree_number = models.IntegerField(default=0, verbose_name="赞同数")

    date = models.DateTimeField(auto_now_add=True, verbose_name="评价日期")
    is_recommend = models.BooleanField("热评推荐", default=False)
    hide = models.BooleanField("不在前端页面显示此条评价", default=False)

    def __str__(self):
        return "%s-%s" % (self.enrolled_course, self.review)

# 购买学位课后，为每个学生每个模块会立刻生成一条学习纪录（未开通）
class StudyRecord(models.Model):
    """学位课程的模块学习进度
       报名学位课程后，每个模块会立刻生成一条学习纪录
    """
    enrolled_degree_course = models.ForeignKey("EnrolledDegreeCourse")
    course_module = models.ForeignKey("Course", verbose_name="学位模块", limit_choices_to={‘course_type‘: 2})
    open_date = models.DateField(blank=True, null=True, verbose_name="开通日期")
    end_date = models.DateField(blank=True, null=True, verbose_name="完成日期")
    status_choices = ((2, ‘在学‘), (1, ‘未开通‘), (0, ‘已完成‘))
    status = models.SmallIntegerField(choices=status_choices, default=1)

    class Meta:
        unique_together = (‘enrolled_degree_course‘, ‘course_module‘)

    def __str__(self):
        return ‘%s-%s‘ % (self.enrolled_degree_course, self.course_module)

    def save(self, *args, **kwargs):
        if self.course_module.degree_course_id != self.enrolled_degree_course.degree_course_id:
            raise ValueError("学员要开通的模块必须与其报名的学位课程一致！")

        super(StudyRecord, self).save(*args, **kwargs)

# 为学生开通一个模块
class CourseSchedule(models.Model):
    """课程进度计划表,针对学位课程，每开通一个模块，就为这个学员生成这个模块的推荐学习计划表，后面的奖惩均按此表进行"""
    study_record = models.ForeignKey("StudyRecord")
    homework = models.ForeignKey("Homework")
    recommend_date = models.DateField("推荐交作业日期")

    def __str__(self):
        return "%s - %s - %s " % (self.study_record, self.homework, self.recommend_date)

    class Meta:
        unique_together = (‘study_record‘, ‘homework‘)

# 学生交作业
class HomeworkRecord(models.Model):
    """学员作业记录及成绩"""
    homework = models.ForeignKey("Homework")
    student = models.ForeignKey("EnrolledDegreeCourse", verbose_name="学生")
    score_choices = (
        (100, ‘A+‘),
        (90, ‘A‘),
        (85, ‘B+‘),
        (80, ‘B‘),
        (70, ‘B-‘),
        (60, ‘C+‘),
        (50, ‘C‘),
        (40, ‘C-‘),
        (-1, ‘D‘),
        (0, ‘N/A‘),
        (-100, ‘COPY‘),
    )
    score = models.SmallIntegerField(verbose_name="分数", choices=score_choices, null=True, blank=True)
    mentor = models.ForeignKey("Account", related_name="my_stu_homework_record", limit_choices_to={‘role‘: 1},
                               verbose_name="导师")
    mentor_comment = models.TextField(verbose_name="导师批注", blank=True, null=True)  # 导师
    status_choice = (
        (0, ‘待批改‘),
        (1, ‘已通过‘),
        (2, ‘不合格‘),
    )
    status = models.SmallIntegerField(verbose_name=‘作业状态‘, choices=status_choice, default=0)

    submit_num = models.SmallIntegerField(verbose_name=‘提交次数‘, default=0)
    correct_date = models.DateTimeField(‘备注日期‘, blank=True, null=True)
    note = models.TextField(blank=True, null=True)
    date = models.DateTimeField("作业提交日期", auto_now_add=True)

    check_date = models.DateTimeField("批改日期", null=True, blank=True)

    update_time = models.DateTimeField(auto_now=True, verbose_name="提交日期")

    # homework_path = models.CharField(verbose_name=‘作业路径‘, max_length=256,blank=True,null=True) 作业路径可以动态拿到，没必要存

    reward_choice = (
        (0, ‘新提交‘),
        (1, ‘按时提交‘),
        (2, ‘未按时提交‘),
        (3, ‘成绩已奖励‘),
        (4, ‘成绩已处罚‘),
        (5, ‘未作按时检测‘),
    )
    reward_status = models.SmallIntegerField(verbose_name=‘作业记录奖惩状态‘, default=0)

    def __str__(self):
        return "%s %s" % (self.homework, self.student)

    class Meta:
        unique_together = ("homework", "student")

# 导师跟进记录
class StuFollowUpRecord(models.Model):
    """学员跟进记录"""
    enrolled_degree_course = models.ForeignKey("EnrolledDegreeCourse", verbose_name="学生")
    mentor = models.ForeignKey("Account", related_name=‘mentor‘, limit_choices_to={‘role‘: 1}, verbose_name="导师")
    followup_tool_choices = ((0, ‘QQ‘), (1, ‘微信‘), (2, ‘电话‘), (3, ‘系统通知‘))
    followup_tool = models.SmallIntegerField(choices=followup_tool_choices, default=1)
    record = models.TextField(verbose_name="跟进记录")
    attachment_path = models.CharField(max_length=128, blank=True, null=True, verbose_name="附件路径",
                                       help_text="跟进记录的截图等")
    date = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return "%s --%s --%s" % (self.enrolled_degree_course, self.record, self.date)

# ######################## 深科技 ########################
class ArticleSource(models.Model):
    """文章来源"""
    name = models.CharField(max_length=64, unique=True)

    def __str__(self):
        return self.name


class Article(models.Model):
    """文章资讯"""
    title = models.CharField(max_length=255, unique=True, db_index=True, verbose_name="标题")
    source = models.ForeignKey("ArticleSource", verbose_name="来源")
    article_type_choices = ((0, ‘资讯‘), (1, ‘视频‘))
    article_type = models.SmallIntegerField(choices=article_type_choices, default=0)
    brief = models.TextField(max_length=512, verbose_name="摘要")
    head_img = models.CharField(max_length=255)
    content = models.TextField(verbose_name="文章正文")
    pub_date = models.DateTimeField(verbose_name="上架日期")
    offline_date = models.DateTimeField(verbose_name="下架日期")
    status_choices = ((0, ‘在线‘), (1, ‘下线‘))
    status = models.SmallIntegerField(choices=status_choices, default=0, verbose_name="状态")
    order = models.SmallIntegerField(default=0, verbose_name="权重", help_text="文章想置顶，可以把数字调大，不要超过1000")
    vid = models.CharField(max_length=128, verbose_name="视频VID", help_text="文章类型是视频, 则需要添加视频VID", blank=True, null=True)
    comment_num = models.SmallIntegerField(default=0, verbose_name="评论数")
    agree_num = models.SmallIntegerField(default=0, verbose_name="点赞数")
    view_num = models.SmallIntegerField(default=0, verbose_name="观看数")
    collect_num = models.SmallIntegerField(default=0, verbose_name="收藏数")

    # tags = models.ManyToManyField("Tags", blank=True, verbose_name="标签")
    date = models.DateTimeField(auto_now_add=True, verbose_name="创建日期")

    position_choices = ((0, ‘信息流‘), (1, ‘banner大图‘), (2, ‘banner小图‘))
    position = models.SmallIntegerField(choices=position_choices, default=0, verbose_name="位置")

    # comment = GenericRelation("Comment")  # 用于GenericForeignKey反向查询， 不会生成表字段，切勿删除，如有疑问请联系老村长

    def __str__(self):
        return "%s-%s" % (self.source, self.title)


class Collection(models.Model):
    """收藏"""
    content_type = models.ForeignKey(ContentType)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey(‘content_type‘, ‘object_id‘)

    account = models.ForeignKey("Account")
    date = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = (‘content_type‘, ‘object_id‘, ‘account‘)


class Comment(models.Model):
    """通用的评论表"""
    # content_type = models.ForeignKey(ContentType, blank=True, null=True, verbose_name="类型")
    # object_id = models.PositiveIntegerField(blank=True, null=True)
    # content_object = GenericForeignKey(‘content_type‘, ‘object_id‘)
    # FK(Article)
    article = models.ForeignKey(‘Article‘)
    p_node = models.ForeignKey("self", blank=True, null=True, verbose_name="父级评论")
    content = models.TextField(max_length=1024)
    account = models.ForeignKey("Account", verbose_name="会员名")
    disagree_number = models.IntegerField(default=0, verbose_name="踩")
    agree_number = models.IntegerField(default=0, verbose_name="赞同数")
    date = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return self.content

# ######################## 购买课程相关 ########################

class EnrolledCourse(models.Model):
    """已报名课程,不包括学位课程"""
    account = models.ForeignKey("Account")
    course = models.ForeignKey("Course", limit_choices_to=~Q(course_type=2))
    enrolled_date = models.DateTimeField(auto_now_add=True)
    valid_begin_date = models.DateField(verbose_name="有效期开始自")
    valid_end_date = models.DateField(verbose_name="有效期结束至")
    status_choices = ((0, ‘已开通‘), (1, ‘已过期‘))
    status = models.SmallIntegerField(choices=status_choices, default=0)
    order_detail = models.OneToOneField("OrderDetail")  # 使订单购买后支持 课程评价

    # order = models.ForeignKey("Order",blank=True,null=True)

    def __str__(self):
        return "%s:%s" % (self.account, self.course)

class DegreeRegistrationForm(models.Model):
    """学位课程报名表"""
    enrolled_degree = models.OneToOneField("EnrolledDegreeCourse")
    current_company = models.CharField(max_length=64, )
    current_position = models.CharField(max_length=64, )
    current_salary = models.IntegerField()
    work_experience_choices = (
        (0, "应届生"),
        (1, "1年"),
        (2, "2年"),
        (3, "3年"),
        (4, "4年"),
        (5, "5年"),
        (6, "6年"),
        (7, "7年"),
        (8, "8年"),
        (9, "9年"),
        (10, "10年"),
        (11, "超过10年"),
    )
    work_experience = models.IntegerField()
    open_module = models.BooleanField("是否开通第1模块", default=True)
    stu_specified_mentor = models.CharField("学员自行指定的导师名", max_length=32, blank=True, null=True)
    study_plan_choices = ((0, "1-2小时/天"),
                          (1, "2-3小时/天"),
                          (2, "3-5小时/天"),
                          (3, "5小时+/天"),
                          )
    study_plan = models.SmallIntegerField(choices=study_plan_choices, default=1)
    why_take_this_course = models.TextField("报此课程原因", max_length=1024)
    why_choose_us = models.TextField("为何选路飞", max_length=1024)
    your_expectation = models.TextField("你的期待", max_length=1024)
    memo = models.CharField(max_length=255, blank=True, null=True)

    def __str__(self):
        return "%s" % self.enrolled_degree

class EnrolledDegreeCourse(models.Model):
    """已报名的学位课程"""
    account = models.ForeignKey("Account")
    degree_course = models.ForeignKey("DegreeCourse")
    enrolled_date = models.DateTimeField(auto_now_add=True)
    valid_begin_date = models.DateField(verbose_name="有效期开始自", blank=True, null=True)  # 开通第一个模块时，再添加课程有效期，2年
    valid_end_date = models.DateField(verbose_name="有效期结束至", blank=True, null=True)
    status_choices = (
        (0, ‘在学中‘),
        (1, ‘休学中‘),
        (2, ‘已毕业‘),
        (3, ‘超时结业‘),
        (4, ‘未开始‘),
        # (3, ‘其它‘),
    )
    study_status = models.SmallIntegerField(choices=status_choices, default=0)
    mentor = models.ForeignKey("Account", verbose_name="导师", related_name=‘my_students‘,
                               blank=True, null=True, limit_choices_to={‘role‘: 1})
    mentor_fee_balance = models.PositiveIntegerField("导师费用余额", help_text="这个学员的导师费用，每有惩罚，需在此字段同时扣除")
    order_detail = models.OneToOneField("OrderDetail")  # 使订单购买后支持填写报名表

    def __str__(self):
        return "%s:%s" % (self.account, self.degree_course)

    class Meta:
        unique_together = (‘account‘, ‘degree_course‘)

class Coupon(models.Model):
    """优惠券生成规则"""
    name = models.CharField(max_length=64, verbose_name="活动名称")
    brief = models.TextField(blank=True, null=True, verbose_name="优惠券介绍")
    coupon_type_choices = ((0, ‘通用券‘), (1, ‘满减券‘), (2, ‘折扣券‘))
    coupon_type = models.SmallIntegerField(choices=coupon_type_choices, default=0, verbose_name="券类型")

    money_equivalent_value = models.IntegerField(verbose_name="等值货币")
    off_percent = models.PositiveSmallIntegerField("折扣百分比", help_text="只针对折扣券，例7.9折，写79", blank=True, null=True)
    minimum_consume = models.PositiveIntegerField("最低消费", default=0, help_text="仅在满减券时填写此字段")

    content_type = models.ForeignKey(ContentType, blank=True, null=True)
    object_id = models.PositiveIntegerField("绑定课程", blank=True, null=True, help_text="可以把优惠券跟课程绑定")
    content_object = GenericForeignKey(‘content_type‘, ‘object_id‘)

    quantity = models.PositiveIntegerField("数量(张)", default=1)
    open_date = models.DateField("优惠券领取开始时间")
    close_date = models.DateField("优惠券领取结束时间")
    valid_begin_date = models.DateField(verbose_name="有效期开始时间", blank=True, null=True)
    valid_end_date = models.DateField(verbose_name="有效结束时间", blank=True, null=True)
    coupon_valid_days = models.PositiveIntegerField(verbose_name="优惠券有效期（天）", blank=True, null=True,
                                                    help_text="自券被领时开始算起")
    date = models.DateTimeField(auto_now_add=True)

    def __str__(self):
        return "%s(%s)" % (self.get_coupon_type_display(), self.name)

    def save(self, *args, **kwargs):
        if not self.coupon_valid_days or (self.valid_begin_date and self.valid_end_date):
            if self.valid_begin_date and self.valid_end_date:
                if self.valid_end_date <= self.valid_begin_date:
                    raise ValueError("valid_end_date 有效期结束日期必须晚于 valid_begin_date ")
            if self.coupon_valid_days == 0:
                raise ValueError("coupon_valid_days 有效期不能为0")
        if self.close_date < self.open_date:
            raise ValueError("close_date 优惠券领取结束时间必须晚于 open_date优惠券领取开始时间 ")

        super(Coupon, self).save(*args, **kwargs)

class CouponRecord(models.Model):
    """优惠券发放、消费纪录"""
    coupon = models.ForeignKey("Coupon")
    # number = models.CharField(max_length=64, unique=True)
    account = models.ForeignKey("Account", verbose_name="拥有者")
    status_choices = ((0, ‘未使用‘), (1, ‘已使用‘), (2, ‘已过期‘),)
    status = models.SmallIntegerField(choices=status_choices, default=0)
    get_time = models.DateTimeField(verbose_name="领取时间", help_text="用户领取时间")
    used_time = models.DateTimeField(blank=True, null=True, verbose_name="使用时间")
    order = models.ForeignKey("Order", blank=True, null=True, verbose_name="关联订单")  # 一个订单可以有多个优惠券

class Order(models.Model):
    """订单"""
    payment_type_choices = ((0, ‘微信‘), (1, ‘支付宝‘), (2, ‘优惠码‘), (3, ‘贝里‘))
    payment_type = models.SmallIntegerField(choices=payment_type_choices)
    payment_number = models.CharField(max_length=128, verbose_name="支付第3方订单号", null=True, blank=True)
    order_number = models.CharField(max_length=128, verbose_name="订单号", unique=True)  # 考虑到订单合并支付的问题
    account = models.ForeignKey("Account")
    actual_amount = models.FloatField(verbose_name="实付金额")

    status_choices = ((0, ‘交易成功‘), (1, ‘待支付‘), (2, ‘退费申请中‘), (3, ‘已退费‘), (4, ‘主动取消‘), (5, ‘超时取消‘))
    status = models.SmallIntegerField(choices=status_choices, verbose_name="状态")
    date = models.DateTimeField(auto_now_add=True, verbose_name="订单生成时间")
    pay_time = models.DateTimeField(blank=True, null=True, verbose_name="付款时间")
    cancel_time = models.DateTimeField(blank=True, null=True, verbose_name="订单取消时间")

    def __str__(self):
        return "%s" % self.order_number

class OrderDetail(models.Model):
    """订单详情"""
    order = models.ForeignKey("Order")

    content_type = models.ForeignKey(ContentType)  # 可关联普通课程或学位
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey(‘content_type‘, ‘object_id‘)

    original_price = models.FloatField("课程原价")
    price = models.FloatField("折后价格")
    content = models.CharField(max_length=255, blank=True, null=True)  # ？
    valid_period_display = models.CharField("有效期显示", max_length=32)  # 在订单页显示
    valid_period = models.PositiveIntegerField("有效期(days)")  # 课程有效期
    memo = models.CharField(max_length=255, blank=True, null=True)

    # def __str__(self):
    #     return "%s - %s - %s" % (self.order, self.content_type, self.price)

    class Meta:
        # unique_together = ("order", ‘course‘)
        unique_together = ("order", ‘content_type‘, ‘object_id‘)

class TransactionRecord(models.Model):
    """贝里交易纪录"""
    account = models.ForeignKey("Account")
    amount = models.IntegerField("金额")
    balance = models.IntegerField("账户余额")
    transaction_type_choices = ((0, ‘收入‘), (1, ‘支出‘), (2, ‘退款‘), (3, "提现"))  # 2 为了处理 订单过期未支付时，锁定期贝里的回退
    transaction_type = models.SmallIntegerField(choices=transaction_type_choices)

    content_type = models.ForeignKey(ContentType, blank=True, null=True)
    object_id = models.PositiveIntegerField(blank=True, null=True, verbose_name="关联对象")
    content_object = GenericForeignKey(‘content_type‘, ‘object_id‘)

    transaction_number = models.CharField(unique=True, verbose_name="流水号", max_length=128)
    date = models.DateTimeField(auto_now_add=True)
    memo = models.CharField(max_length=128, blank=True, null=True)

    def __str__(self):
        return "%s" % self.transaction_number


# ######################## 用户 ########################
class Account(models.Model):
    username = models.CharField("用户名", max_length=64, unique=True)
    password = models.CharField(‘password‘, max_length=128)

class UserAuthToken(models.Model):
    """
    用户Token表
    """
    user = models.OneToOneField(to="Account")
    token = models.CharField(max_length=40)
    created = models.DateTimeField(auto_now_add=True)

from rest_framework.views import APIView
from rest_framework.response import Response
from django.core.exceptions import ObjectDoesNotExist
from api import models
from api.utils.auth.api_view import AuthAPIView
from api.utils.exception import PricePolicyDoesNotExist
from pool import POOL
import json
from django.conf import settings

import redis
CONN = redis.Redis(connection_pool=POOL)

class ShoppingCarView(AuthAPIView,APIView):

    def get(self,request,*args,**kwargs):
        """
        查看购物车
        :param request:
        :param args:
        :param kwargs:
        :return:
        """
        course = CONN.hget(settings.LUFFY_SHOPPING_CAR,request.user.id)
        course_dict = json.loads(course.decode(‘utf-8‘))
        return Response(course_dict)

    def post(self,request,*args,**kwargs):
        """
        获取课程ID和价格策略ID，放入redis
        :param request:
        :param args:
        :param kwargs:
        :return:
        """
        ret = {‘code‘:1000,‘msg‘:None}
        try:
            course_id = request.data.get(‘course_id‘)

            price_policy_id = request.data.get(‘price_policy_id‘)

            # 1. 获取课程
            course_obj = models.Course.objects.get(id=course_id)
            # 2. 获取当前课程的所有价格策略: id, 有效期，价格
            price_policy_list = []
            flag = False
            price_policy_objs = course_obj.price_policy.all()
            for item in price_policy_objs:
                if item.id == price_policy_id:
                    flag = True
                price_policy_list.append({‘id‘:item.id,
                                          ‘valid_period‘:item.get_valid_period_display(),
                                          ‘price‘:item.price})
            if not flag:
                raise PricePolicyDoesNotExist()

            # 3. 课程和价格策略均没有问题，将课程和价格策略放到redis中
            # 课程id,课程图片地址,课程标题，所有价格策略，默认价格策略
            course_dict = {
                ‘id‘:course_obj.id,
                ‘img‘:course_obj.course_img,
                ‘title‘:course_obj.name,
                ‘price_policy_list‘:price_policy_list,
                ‘default_policy_id‘:price_policy_id
            }

            # a. 获取当前用户购物车中的课程 car = {1: {,,,}, 2:{....}}
            # b. car[course_obj.id] = course_dict
            # c. conn.hset(‘luffy_shopping_car‘,request.user.id,car)
            nothing = CONN.hget(settings.LUFFY_SHOPPING_CAR,request.user.id)
            if not nothing:
                data = {course_obj.id: course_dict}
            else:
                data = json.loads(nothing.decode(‘utf-8‘))
                data[course_obj.id] = course_dict

            CONN.hset(settings.LUFFY_SHOPPING_CAR,request.user.id, json.dumps(data))

        except ObjectDoesNotExist as e:
            ret[‘code‘] = 1001
            ret[‘msg‘] = "课程不存在"
        except PricePolicyDoesNotExist as e:
            ret[‘code‘] = 1002
            ret[‘msg‘] = "价格策略不存在"
        except Exception as e:
            ret[‘code‘] = 1003
            ret[‘msg‘] = "添加购物车异常"
        print()
        return Response(ret)


    def patch(self,request,*args,**kwargs):
        ‘‘‘
        修改价格策略,课程id不变,价格策略id变化
        :param reques:
        :param args:
        :param kwargs:
        :return:
        ‘‘‘
        ret = {‘code‘: 1000, ‘msg‘: None}
        try:
            #课程id
            course_id = request.data.get(‘course_id‘)
            course_id=str(course_id)
            #修改后的价格策略id
            price_policy_id = request.data.get(‘price_policy_id‘)
            #当前用户的购物车
            cart=CONN.hget(settings.LUFFY_SHOPPING_CAR,request.user.id)
            print(cart)
            if not cart:
                raise  Exception(‘访问的购物车不存在‘)


            cart=json.loads(cart.decode(‘utf-8‘))
            #判断课程师傅在当前用户的购物车中
            if course_id not in cart:
                raise Exception(‘该课程在购物车中不存在‘)

            #当前课程所有的价格策略
            currentCourse_price_police= cart[course_id][‘price_policy_list‘]

            policy_exit=False
            #如果当前选择的价格策略在当前的课程策略中
            for price_policy in currentCourse_price_police:
                if price_policy[‘id‘]==price_policy_id:
                    policy_exit=True
                    break

            if not policy_exit:
                raise PricePolicyDoesNotExist()
            #将购物车中的当前课程的价格策略设置为当前的价格策略
            cart[course_id][‘default_policy_id‘]=price_policy_id
            CONN.hset(settings.LUFFY_SHOPPING_CAR,request.user.id,json.dumps(cart))
            print(cart)

        except PricePolicyDoesNotExist as e:
            ret[‘code‘] = 1001
            ret[‘msg‘] = ‘价格策略不存在‘

        except Exception as e:
            ret[‘code‘]=1002
            ret[‘msg‘]=str(e)
        return Response(ret)


    def delete(self,request,*args,**kwargs):
        ret = {‘code‘: 1000, ‘msg‘: None}
        try:
            course_id=request.data.get(‘course_id‘)
            course_id=str(course_id)
            #获取当前用户的购物车
            cart=CONN.hget(settings.LUFFY_SHOPPING_CAR,request.user.id)
            print(cart)
            #如果没有购物车
            if not cart:
                raise  Exception(‘购物车里面没有东西‘)

            cart=json.loads(cart.decode(‘utf-8‘))
            #当前用户购物车中没有该课程
            if course_id not in cart:
                raise Exception(‘所删除的课程没在购物车中‘)

            #删除该课程
            del cart[course_id]

            #写入到redis中
            CONN.hset(settings.LUFFY_SHOPPING_CAR,request.user.id,json.dumps(cart))
        except Exception as e:
            ret[‘code‘]=1001
            ret[‘msg‘]=str(e)

        return Response(ret)

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import json
import datetime
from django.conf import settings

from rest_framework.views import APIView
from rest_framework.response import Response

from api.utils import redis_pool
from api.utils.auth.api_view import AuthAPIView
from api import models


class PaymentView(AuthAPIView,APIView):
    """
    去结算接口
    """
    def get(self, request, *args, **kwargs):
        """
        获取结算列表
        :param request: 
        :param args: 
        :param kwargs: 
        :return: 
        """
        response = {‘code‘: 1000}
        try:
            # 结算商品列表
            payment_list = redis_pool.conn.hget(settings.LUFFY_PAYMENT, request.user.id)
            if not payment_list:
                raise Exception()

            response[‘data‘] = {
                ‘payment_list‘: json.loads(payment_list.decode(‘utf-8‘)),  # 结算信息（课程、价格和优惠券）
                "balance": request.user.balance  # 个人贝里账户，可使用贝里金额
            }
        except Exception as e:
            response[‘code‘] = 1001
            response[‘msg‘] = "结算列表为空"

        return Response(response)

    def post(self, request, *args, **kwargs):
        """
        去结算
            方案一（示例）：用户提交课程id，去redis购物车中获取其选好的价格策略，再次检测课程和价格策略的合法性。
                   PS: 直接购买时，需要先加入购物车，再立即去结算

            方案二：用户提交课程id和价格策略id，去数据库验证其合法性。
                   PS: 直接购买时，直接去结算
            
            user.id: {
                policy_course_dict:{
                    课程ID:{
                        ‘course_id‘: course_id,
                        ‘course_name‘: product[‘name‘],
                        ‘course_img‘: product[‘course_img‘],
                        ‘policy_id‘: product[‘choice_policy_id‘],
                        ‘policy_price‘: policy_price,
                        ‘policy_‘: policy_period,
                        ‘coupon_record_list‘: {
                            0:{‘id‘: 0, ‘text‘: ‘请选择优惠券‘},
                            1:{‘id‘: 1, ‘type‘:1, ‘text‘: ‘优惠券1‘, ..},
                            2:{‘id‘: 2, ‘type‘:2, ‘text‘: ‘优惠券1‘, ..},
                            3: {‘id‘: 3, ‘type‘:3, ‘text‘: ‘优惠券1‘, ..},
                        },
                    },
                    课程ID:{
                        ‘course_id‘: course_id,
                        ‘course_name‘: product[‘name‘],
                        ‘course_img‘: product[‘course_img‘],
                        ‘policy_id‘: product[‘choice_policy_id‘],
                        ‘policy_price‘: policy_price,
                        ‘policy_‘: policy_period,
                        ‘coupon_record_list‘: {
                            0:{‘id‘: 0, ‘text‘: ‘请选择优惠券‘},
                            1:{‘id‘: 1, ‘type‘:1, ‘text‘: ‘优惠券1‘, ..},
                            2:{‘id‘: 2, ‘type‘:2, ‘text‘: ‘优惠券1‘, ..},
                            3: {‘id‘: 3, ‘type‘:3, ‘text‘: ‘优惠券1‘, ..},
                        },
                    }
                },
                global_coupon_dict:{
                    1:{‘type‘: 0, ‘text‘: "通用优惠券", ‘id‘: 1, ..},
                    2:{‘type‘: 0, ‘text‘: "通用优惠券", ‘id‘: 2, ..},
                    3:{‘type‘: 0, ‘text‘: "通用优惠券", ‘id‘: 3, ...},
                    4:{‘type‘: 0, ‘text‘: "通用优惠券", ‘id‘: 4, ...},
                },
                choice_global_coupon:0
            }  
                   
            
        :param request: 
        :param args: 
        :param kwargs: 
        :return: 
        """
        response = {‘code‘: 1001}
        try:

            # a. 获取用户提交的课程id, [1,2]
            course_id_list = request.data.get(‘course_list‘)
            if not course_id_list or not isinstance(course_id_list, list):
                raise Exception(‘请选择要结算的课程‘)

            # b. 购物车中检查是否已经有课程（应该有课程的）
            product_dict = redis_pool.conn.hget(settings.LUFFY_SHOPPING_CAR, request.user.id)
            if not product_dict:
                raise Exception(‘购物车无课程‘)

            # c. 购物车中是否有用户要购买的课程
            product_dict = json.loads(product_dict.decode(‘utf-8‘))

            # ###### 课程、价格和优惠券 #######
            policy_course_dict = {}

            # 循环用户传递过来的要结算的课程ID列表
            for course_id in course_id_list:
                course_id = str(course_id)
                product = product_dict.get(course_id)
                if not product:
                    raise Exception(‘购买的课程必须先加入购物车‘)

                # 获取选中价格策略的价格详细
                policy_exist = False
                for policy in product[‘price_policy_list‘]:
                    if policy[‘id‘] == product[‘choice_policy_id‘]:
                        policy_price = policy[‘price‘]
                        policy_period = policy[‘period‘]
                        policy_valid_period = policy[‘valid_period‘]
                        policy_exist = True
                        break
                if not policy_exist:
                    raise Exception(‘购物车中的课程无此价格‘)


                policy_course = {
                    ‘course_id‘: course_id,
                    ‘course_name‘: product[‘name‘],
                    ‘course_img‘: product[‘course_img‘],
                    ‘policy_id‘: product[‘choice_policy_id‘],
                    ‘policy_price‘: policy_price,
                    ‘policy_period‘: policy_period,
                    ‘policy_valid_period‘: policy_valid_period,
                    ‘default_coupon_id‘: 0,
                    ‘coupon_record_list‘: {
                        0:{‘id‘: 0, ‘text‘: ‘请选择优惠券‘},
                    },
                }
                policy_course_dict[course_id] = policy_course

            # 获取当前所有优惠券
            user_coupon_list = models.CouponRecord.objects.filter(account=request.user,status=0)
            # ###### 全局优惠券 #######
            global_coupon_record_dict = {}

            # 课程优惠券添加到课程中；全局优惠券添加到全局
            current_date = datetime.datetime.now().date()
            for record in user_coupon_list:
                # 检查优惠券是否已经过期
                begin_date = record.coupon.valid_begin_date
                end_date = record.coupon.valid_end_date
                if begin_date:
                    if current_date < begin_date:
                        continue
                if end_date:
                    if current_date > end_date:
                        continue
                # 全局优惠券
                if not record.coupon.content_type:
                    if record.coupon.coupon_type == 0:
                        temp = {‘type‘: 0, ‘text‘: "通用优惠券", ‘id‘: record.id,
                                ‘begin_date‘: begin_date, ‘end_date‘: end_date,
                                ‘money_equivalent_value‘: record.coupon.money_equivalent_value}
                    elif record.coupon.coupon_type == 1:
                        temp = {‘type‘: 1, ‘text‘: "满减券", ‘id‘: record.id,
                                ‘begin_date‘: begin_date, ‘end_date‘: end_date,
                                ‘minimum_consume‘: record.coupon.minimum_consume,
                                ‘money_equivalent_value‘: record.coupon.money_equivalent_value}
                    elif record.coupon.coupon_type == 2:
                        temp = {‘type‘: 2, ‘text‘: "折扣券", ‘id‘: record.id,
                                ‘begin_date‘: begin_date, ‘end_date‘: end_date,
                                ‘off_percent‘: record.coupon.off_percent}
                    else:
                        continue

                    global_coupon_record_dict[record.id] = temp
                # 课程优惠券
                else:
                    cid = record.coupon.object_id
                    if record.coupon.content_type.model == ‘course‘ and cid in policy_course_dict:
                        # 课程价格：满减，打折，通用
                        if record.coupon.coupon_type == 0:
                            temp = {‘type‘: 0, ‘text‘: "通用优惠券", ‘id‘: record.id,
                                    ‘begin_date‘: begin_date, ‘end_date‘: end_date,
                                    ‘money_equivalent_value‘: record.coupon.money_equivalent_value}
                        elif record.coupon.coupon_type == 1 and policy_course_dict[cid][‘policy_price‘] >= record.coupon.minimum_consume:
                            temp = {‘type‘: 1, ‘text‘: "满减券", ‘id‘: record.id,
                                    ‘begin_date‘: begin_date, ‘end_date‘: end_date,
                                    ‘minimum_consume‘: record.coupon.minimum_consume,
                                    ‘money_equivalent_value‘: record.coupon.money_equivalent_value}
                        elif record.coupon.coupon_type == 2:
                            temp = {‘type‘: 2, ‘text‘: "折扣券", ‘id‘: record.id,
                                    ‘begin_date‘: begin_date, ‘end_date‘: end_date,
                                    ‘off_percent‘: record.coupon.off_percent}
                        else:
                            continue
                        policy_course_dict[cid][‘coupon_record_list‘][record.id] = temp

            user_pay = {
                ‘policy_course_dict‘: policy_course_dict,
                ‘global_coupon_record_dict‘: global_coupon_record_dict,
                ‘default_global_coupon_id‘: 0,
            }
            redis_pool.conn.hset(settings.LUFFY_PAYMENT, request.user.id, json.dumps(user_pay))

        except Exception as e:
            response[‘code‘] = 1002
            response[‘msg‘] = str(e)

        return Response(response)

    def patch(self,request, *args, **kwargs):
        """
        选择优惠券
        1. 获取用户提交数据
            {
                course_id: ‘课程id‘,
                coupon_id: ‘优惠券ID‘
            }
            {
                course_id: 0‘,
                coupon_id: ‘全局优惠券ID‘
            }

        :param request:
        :param args:
        :param kwargs:
        :return:
        """
        return Response(‘...‘)