backend/internal/repository/report_repo.go

package repository

import (
	"with_you/internal/dto"
	"with_you/internal/model"
	"context"

	"gorm.io/gorm"
)

// ReportRepository 举报仓储接口
type ReportRepository interface {
	// Create 创建举报
	Create(report *model.Report) error
	// CreateWithContext 使用上下文创建举报（支持事务）
	CreateWithContext(ctx context.Context, report *model.Report) error
	// FindByID 根据ID查询举报
	FindByID(id string) (*model.Report, error)
	// FindByIDWithContext 使用上下文查询举报
	FindByIDWithContext(ctx context.Context, id string) (*model.Report, error)
	// List 查询举报列表
	List(query dto.AdminReportListQuery) ([]*model.Report, int64, error)
	// GetReportCount 获取内容的举报次数
	GetReportCount(targetType model.ReportTargetType, targetID string) (int64, error)
	// HasUserReported 检查用户是否已举报过该内容
	HasUserReported(reporterID string, targetType model.ReportTargetType, targetID string) (bool, error)
	// GetPendingReportsByTarget 获取目标内容的待处理举报
	GetPendingReportsByTarget(targetType model.ReportTargetType, targetID string) ([]*model.Report, error)
	// UpdateStatus 更新举报状态
	UpdateStatus(id string, status model.ReportStatus, handledBy string, result string) error
	// UpdateStatusWithContext 使用上下文更新举报状态
	UpdateStatusWithContext(ctx context.Context, id string, status model.ReportStatus, handledBy string, result string) error
	// BatchUpdateStatus 批量更新举报状态
	BatchUpdateStatus(ids []string, status model.ReportStatus, handledBy string, result string) (int64, error)
	// BatchUpdateStatusWithContext 使用上下文批量更新举报状态
	BatchUpdateStatusWithContext(ctx context.Context, ids []string, status model.ReportStatus, handledBy string, result string) (int64, error)
	// GetByIDsWithContext 使用上下文批量查询举报
	GetByIDsWithContext(ctx context.Context, ids []string) ([]*model.Report, error)
}

// reportRepository 举报仓储实现
type reportRepository struct {
	db *gorm.DB
}

// NewReportRepository 创建举报仓储
func NewReportRepository(db *gorm.DB) ReportRepository {
	return &reportRepository{db: db}
}

// getDB 获取数据库实例（支持事务）
func (r *reportRepository) getDB(ctx context.Context) *gorm.DB {
	if tx := GetTxFromContext(ctx); tx != nil {
		return tx
	}
	return r.db
}

// Create 创建举报
func (r *reportRepository) Create(report *model.Report) error {
	return r.db.Create(report).Error
}

// CreateWithContext 使用上下文创建举报
func (r *reportRepository) CreateWithContext(ctx context.Context, report *model.Report) error {
	return r.getDB(ctx).Create(report).Error
}

// FindByID 根据ID查询举报
func (r *reportRepository) FindByID(id string) (*model.Report, error) {
	var report model.Report
	err := r.db.Where("id = ?", id).First(&report).Error
	if err != nil {
		return nil, err
	}
	return &report, nil
}

// FindByIDWithContext 使用上下文查询举报
func (r *reportRepository) FindByIDWithContext(ctx context.Context, id string) (*model.Report, error) {
	var report model.Report
	err := r.getDB(ctx).Where("id = ?", id).First(&report).Error
	if err != nil {
		return nil, err
	}
	return &report, nil
}

// List 查询举报列表
func (r *reportRepository) List(query dto.AdminReportListQuery) ([]*model.Report, int64, error) {
	var reports []*model.Report
	var total int64

	db := r.db.Model(&model.Report{})

	// 筛选条件
	if query.TargetType != "" {
		db = db.Where("target_type = ?", query.TargetType)
	}
	if query.Status != "" {
		db = db.Where("status = ?", query.Status)
	}
	if query.StartDate != "" {
		db = db.Where("created_at >= ?", query.StartDate)
	}
	if query.EndDate != "" {
		db = db.Where("created_at <= ?", query.EndDate+" 23:59:59")
	}
	if query.Keyword != "" {
		keyword := "%" + query.Keyword + "%"
		db = db.Where("description LIKE ? OR reason LIKE ?", keyword, keyword)
	}

	// 获取总数
	if err := db.Count(&total).Error; err != nil {
		return nil, 0, err
	}

	// 分页查询
	offset := (query.Page - 1) * query.PageSize
	if query.PageSize <= 0 {
		query.PageSize = 20
	}
	if query.Page <= 0 {
		query.Page = 1
	}

	err := db.Order("created_at DESC").
		Offset(offset).
		Limit(query.PageSize).
		Find(&reports).Error
	if err != nil {
		return nil, 0, err
	}

	return reports, total, nil
}

// GetReportCount 获取内容的举报次数
func (r *reportRepository) GetReportCount(targetType model.ReportTargetType, targetID string) (int64, error) {
	var count int64
	err := r.db.Model(&model.Report{}).
		Where("target_type = ? AND target_id = ?", targetType, targetID).
		Count(&count).Error
	return count, err
}

// HasUserReported 检查用户是否已举报过该内容
func (r *reportRepository) HasUserReported(reporterID string, targetType model.ReportTargetType, targetID string) (bool, error) {
	var count int64
	err := r.db.Model(&model.Report{}).
		Where("reporter_id = ? AND target_type = ? AND target_id = ?", reporterID, targetType, targetID).
		Count(&count).Error
	return count > 0, err
}

// GetPendingReportsByTarget 获取目标内容的待处理举报
func (r *reportRepository) GetPendingReportsByTarget(targetType model.ReportTargetType, targetID string) ([]*model.Report, error) {
	var reports []*model.Report
	err := r.db.Where("target_type = ? AND target_id = ? AND status = ?", targetType, targetID, model.ReportStatusPending).
		Find(&reports).Error
	return reports, err
}

// UpdateStatus 更新举报状态
func (r *reportRepository) UpdateStatus(id string, status model.ReportStatus, handledBy string, result string) error {
	updates := map[string]any{
		"status":     status,
		"handled_by": handledBy,
		"result":     result,
	}
	return r.db.Model(&model.Report{}).Where("id = ?", id).Updates(updates).Error
}

// UpdateStatusWithContext 使用上下文更新举报状态
func (r *reportRepository) UpdateStatusWithContext(ctx context.Context, id string, status model.ReportStatus, handledBy string, result string) error {
	updates := map[string]any{
		"status":     status,
		"handled_by": handledBy,
		"result":     result,
	}
	return r.getDB(ctx).Model(&model.Report{}).Where("id = ?", id).Updates(updates).Error
}

// BatchUpdateStatus 批量更新举报状态
func (r *reportRepository) BatchUpdateStatus(ids []string, status model.ReportStatus, handledBy string, result string) (int64, error) {
	updates := map[string]any{
		"status":     status,
		"handled_by": handledBy,
		"result":     result,
	}
	resultDB := r.db.Model(&model.Report{}).Where("id IN ?", ids).Updates(updates)
	return resultDB.RowsAffected, resultDB.Error
}

// BatchUpdateStatusWithContext 使用上下文批量更新举报状态
func (r *reportRepository) BatchUpdateStatusWithContext(ctx context.Context, ids []string, status model.ReportStatus, handledBy string, result string) (int64, error) {
	updates := map[string]any{
		"status":     status,
		"handled_by": handledBy,
		"result":     result,
	}
	resultDB := r.getDB(ctx).Model(&model.Report{}).Where("id IN ?", ids).Updates(updates)
	return resultDB.RowsAffected, resultDB.Error
}

// GetByIDsWithContext 使用上下文批量查询举报
func (r *reportRepository) GetByIDsWithContext(ctx context.Context, ids []string) ([]*model.Report, error) {
	var reports []*model.Report
	err := r.getDB(ctx).Where("id IN ?", ids).Find(&reports).Error
	return reports, err
}