135 lines
4.3 KiB
Python
135 lines
4.3 KiB
Python
"""
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公告服务
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"""
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from sqlalchemy.orm import Session
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from sqlalchemy import and_, desc, or_
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from typing import List, Optional
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from datetime import datetime
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from ..models.announcement import Announcement, AnnouncementType
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from ..schemas.announcement import (
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AnnouncementCreate,
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AnnouncementUpdate,
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)
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class AnnouncementService:
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"""公告服务"""
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@staticmethod
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def create_announcement(db: Session, announcement_data: AnnouncementCreate) -> Announcement:
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"""创建公告"""
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db_announcement = Announcement(**announcement_data.dict())
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db.add(db_announcement)
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db.commit()
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db.refresh(db_announcement)
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return db_announcement
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@staticmethod
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def get_announcement(db: Session, announcement_id: int) -> Optional[Announcement]:
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"""获取公告"""
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return db.query(Announcement).filter(Announcement.id == announcement_id).first()
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@staticmethod
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def get_announcements(
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db: Session,
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skip: int = 0,
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limit: int = 20,
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include_expired: bool = False
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) -> List[Announcement]:
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"""获取公告列表"""
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query = db.query(Announcement)
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# 排除过期的公告（除非特别要求）
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if not include_expired:
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now = datetime.now()
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query = query.filter(
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or_(
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Announcement.expires_at.is_(None),
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Announcement.expires_at > now
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)
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)
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return query.order_by(desc(Announcement.priority), desc(Announcement.created_at)).offset(skip).limit(limit).all()
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@staticmethod
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def get_active_announcements(db: Session, limit: int = 5) -> List[Announcement]:
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"""获取活跃公告（置顶优先）"""
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now = datetime.now()
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return db.query(Announcement).filter(
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or_(
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Announcement.starts_at.is_(None),
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Announcement.starts_at <= now
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),
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or_(
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Announcement.expires_at.is_(None),
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Announcement.expires_at > now
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)
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).order_by(desc(Announcement.is_pinned), desc(Announcement.priority), desc(Announcement.created_at)).limit(limit).all()
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@staticmethod
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def update_announcement(
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db: Session,
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announcement: Announcement,
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announcement_data: AnnouncementUpdate
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) -> Announcement:
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"""更新公告"""
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update_data = announcement_data.dict(exclude_unset=True)
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for field, value in update_data.items():
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setattr(announcement, field, value)
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db.commit()
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db.refresh(announcement)
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return announcement
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@staticmethod
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def delete_announcement(db: Session, announcement_id: int) -> bool:
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"""删除公告"""
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announcement = db.query(Announcement).filter(Announcement.id == announcement_id).first()
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if not announcement:
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return False
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db.delete(announcement)
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db.commit()
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return True
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@staticmethod
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def pin_announcement(db: Session, announcement_id: int, pinned: bool = True) -> bool:
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"""置顶/取消置顶公告"""
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announcement = db.query(Announcement).filter(Announcement.id == announcement_id).first()
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if not announcement:
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return False
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announcement.is_pinned = pinned
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if pinned:
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announcement.priority = 100 # 设置高优先级
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db.commit()
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return True
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@staticmethod
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def set_announcement_priority(db: Session, announcement_id: int, priority: int) -> bool:
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"""设置公告优先级"""
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announcement = db.query(Announcement).filter(Announcement.id == announcement_id).first()
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if not announcement:
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return False
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announcement.priority = max(0, min(100, priority))
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db.commit()
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return True
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@staticmethod
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def get_pinned_announcements(db: Session) -> List[Announcement]:
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"""获取置顶公告"""
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now = datetime.now()
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return db.query(Announcement).filter(
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Announcement.is_pinned == True,
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or_(
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Announcement.starts_at.is_(None),
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Announcement.starts_at <= now
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),
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or_(
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Announcement.expires_at.is_(None),
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Announcement.expires_at > now
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)
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).order_by(desc(Announcement.priority), desc(Announcement.created_at)).all()
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