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174 lines
7.4 KiB
174 lines
7.4 KiB
from datetime import date
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from typing import List, Optional, Dict
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from copy import deepcopy
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from model.student import Student
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from DAL.clear_all_student import IStudentDAL
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class StudentBLL:
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def __init__(self, dal: IStudentDAL):
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self.dal = dal
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def add_student(self, student: Student) -> bool:
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"""添加学生信息，进行完整校验和唯一性检查"""
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# 1. 数据校验
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if not student.is_valid:
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raise ValueError(f"学生数据校验不通过。错误信息: {student.get_errors()}")
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# 2. 唯一性检查
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if self.dal.check_student_exists_by_id_card(student.id_card):
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raise ValueError(f"身份证号 {student.id_card} 已存在")
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if self.dal.check_student_exists_by_stu_id(student.stu_id):
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raise ValueError(f"学号 {student.stu_id} 已存在")
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# 3. 业务规则检查
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today = date.today()
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if student.birth_date and student.birth_date > today:
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raise ValueError("出生日期不能晚于当前日期")
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if student.enrollment_date and student.enrollment_date > today:
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raise ValueError("入学日期不能晚于当前日期")
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if student.height and (student.height <= 0 or student.height > 250):
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raise ValueError("身高必须在0-250厘米之间")
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if student.weight and (student.weight <= 0 or student.weight > 300):
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raise ValueError("体重必须在0-300公斤之间")
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# 4. 添加学生
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return self.dal.add_student(student)
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def delete_student_by_id_card(self, id_card: str) -> bool:
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"""根据身份证号删除学生信息"""
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if not self.dal.check_student_exists_by_id_card(id_card):
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raise ValueError(f"身份证号 {id_card} 不存在")
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return self.dal.delete_student_by_id_card(id_card)
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def delete_student_by_stu_id(self, stu_id: str) -> bool:
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"""根据学号删除学生信息"""
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if not self.dal.check_student_exists_by_stu_id(stu_id):
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raise ValueError(f"学号 {stu_id} 不存在")
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return self.dal.delete_student_by_stu_id(stu_id)
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def update_student(self, id_card: str, student: Student) -> bool:
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"""完整更新学生信息"""
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# 1. 存在性检查
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if not self.dal.check_student_exists_by_id_card(id_card):
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raise ValueError(f"身份证号 {id_card} 不存在")
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# 2. 数据校验
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if not student.is_valid:
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raise ValueError(f"学生数据校验不通过。错误信息: {student.get_errors()}")
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# 3. 业务规则检查
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today = date.today()
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if student.birth_date and student.birth_date > today:
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raise ValueError("出生日期不能晚于当前日期")
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if student.enrollment_date and student.enrollment_date > today:
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raise ValueError("入学日期不能晚于当前日期")
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if student.height and (student.height <= 0 or student.height > 250):
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raise ValueError("身高必须在0-250厘米之间")
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if student.weight and (student.weight <= 0 or student.weight > 300):
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raise ValueError("体重必须在0-300公斤之间")
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# 4. 执行更新
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return self.dal.update_student(id_card, student)
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def update_student_partial(self, id_card: str, **kwargs) -> bool:
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"""部分更新学生信息"""
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# 1. 存在性检查
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student = self.dal.find_student_by_id_card(id_card)
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if not student:
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raise ValueError(f"身份证号 {id_card} 不存在")
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# 2. 保护关键字段 - 身份证号不可更改
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if 'id_card' in kwargs:
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raise ValueError("身份证号不可更改")
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# 3. 创建更新后的学生对象
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updated_student = deepcopy(student)
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for key, value in kwargs.items():
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if hasattr(updated_student, key):
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setattr(updated_student, key, value)
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# 4. 数据校验
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if not updated_student.is_valid:
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raise ValueError(f"学生数据校验不通过。错误信息: {updated_student.get_errors()}")
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# 5. 业务规则检查
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today = date.today()
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if updated_student.birth_date and updated_student.birth_date > today:
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raise ValueError("出生日期不能晚于当前日期")
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if updated_student.enrollment_date and updated_student.enrollment_date > today:
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raise ValueError("入学日期不能晚于当前日期")
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if updated_student.height and (updated_student.height <= 0 or updated_student.height > 250):
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raise ValueError("身高必须在0-250厘米之间")
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if updated_student.weight and (updated_student.weight <= 0 or updated_student.weight > 300):
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raise ValueError("体重必须在0-300公斤之间")
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# 6. 学号唯一性检查（如果学号有变化）
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if 'stu_id' in kwargs and kwargs['stu_id'] != student.stu_id:
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if self.dal.check_student_exists_by_stu_id(kwargs['stu_id']):
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raise ValueError(f"学号 {kwargs['stu_id']} 已存在")
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# 7. 执行更新
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return self.dal.update_student(id_card, updated_student)
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def get_student_by_id_card(self, id_card: str) -> Optional[Student]:
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"""根据身份证号查询学生信息"""
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return self.dal.find_student_by_id_card(id_card)
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def get_student_by_stu_id(self, stu_id: str) -> Optional[Student]:
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"""根据学号查询学生信息"""
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return self.dal.find_student_by_stu_id(stu_id)
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def get_students_by_name(self, name: str) -> List[Student]:
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"""根据姓名查询学生信息（模糊匹配）"""
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return self.dal.find_students_by_name(name)
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def get_students_by_class_name(self, class_name: str) -> List[Student]:
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"""根据班级名称查询学生信息（模糊匹配）"""
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return self.dal.find_students_by_class_name(class_name)
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def get_students_by_major(self, major: str) -> List[Student]:
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"""根据专业查询学生信息（模糊匹配）"""
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return self.dal.find_students_by_major(major)
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def get_all_students(self) -> List[Student]:
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"""获取所有学生信息"""
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return self.dal.get_all_students()
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def get_student_count(self) -> int:
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"""获取学生总数"""
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return self.dal.get_student_count()
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def get_students_by_height_range(self, min_height: int, max_height: int) -> List[Student]:
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"""按身高范围查询学生"""
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return self.dal.get_students_by_height_range(min_height, max_height)
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def get_students_by_enrollment_year(self, year: int) -> List[Student]:
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"""按入学年份查询学生"""
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return self.dal.get_students_by_enrollment_year(year)
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def get_students_by_age_range(self, min_age: int, max_age: int) -> List[Student]:
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"""按年龄范围查询学生"""
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return self.dal.get_students_by_age_range(min_age, max_age)
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def get_students_by_major_group(self) -> Dict[str, List[Student]]:
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"""按专业分组学生"""
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return self.dal.get_students_by_major_group()
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def get_average_height(self) -> float:
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"""计算平均身高"""
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return self.dal.get_average_height()
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def get_average_weight(self) -> float:
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"""计算平均体重"""
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return self.dal.get_average_weight()
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def get_gender_ratio(self) -> Dict[Optional[bool], float]:
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"""计算性别比例"""
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return self.dal.get_gender_ratio()
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def clear_all_students(self) -> None:
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"""清空所有学生信息"""
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self.dal.clear_all_students()
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