backend/internal/dto/group_converter.go

package dto

import (
	"with_you/internal/model"
)

// ==================== Group 转换 ====================

// GroupToResponse 将Group转换为GroupResponse
func GroupToResponse(group *model.Group) *GroupResponse {
	if group == nil {
		return nil
	}
	return &GroupResponse{
		ID:          group.ID,
		Name:        group.Name,
		Avatar:      group.Avatar,
		Description: group.Description,
		OwnerID:     group.OwnerID,
		MemberCount: group.MemberCount,
		MaxMembers:  group.MaxMembers,
		JoinType:    int(group.JoinType),
		MuteAll:     group.MuteAll,
		CreatedAt:   FormatTime(group.CreatedAt),
	}
}

// GroupsToResponse 将Group列表转换为GroupResponse列表
func GroupsToResponse(groups []model.Group) []*GroupResponse {
	result := make([]*GroupResponse, 0, len(groups))
	for i := range groups {
		result = append(result, GroupToResponse(&groups[i]))
	}
	return result
}

// GroupMemberToResponse 将GroupMember转换为GroupMemberResponse
func GroupMemberToResponse(member *model.GroupMember) *GroupMemberResponse {
	if member == nil {
		return nil
	}
	return &GroupMemberResponse{
		ID:       member.ID,
		GroupID:  member.GroupID,
		UserID:   member.UserID,
		Role:     member.Role,
		Nickname: member.Nickname,
		Muted:    member.Muted,
		JoinTime: FormatTime(member.JoinTime),
	}
}


// GroupAnnouncementToResponse 将GroupAnnouncement转换为GroupAnnouncementResponse
func GroupAnnouncementToResponse(announcement *model.GroupAnnouncement) *GroupAnnouncementResponse {
	if announcement == nil {
		return nil
	}
	return &GroupAnnouncementResponse{
		ID:        announcement.ID,
		GroupID:   announcement.GroupID,
		Content:   announcement.Content,
		AuthorID:  announcement.AuthorID,
		IsPinned:  announcement.IsPinned,
		CreatedAt: FormatTime(announcement.CreatedAt),
	}
}

// GroupAnnouncementsToResponse 将GroupAnnouncement列表转换为GroupAnnouncementResponse列表
func GroupAnnouncementsToResponse(announcements []model.GroupAnnouncement) []*GroupAnnouncementResponse {
	result := make([]*GroupAnnouncementResponse, 0, len(announcements))
	for i := range announcements {
		result = append(result, GroupAnnouncementToResponse(&announcements[i]))
	}
	return result
}

// GroupsToResponseFromPtr 将Group指针切片转换为GroupResponse列表
func GroupsToResponseFromPtr(groups []*model.Group) []*GroupResponse {
	result := make([]*GroupResponse, 0, len(groups))
	for _, group := range groups {
		result = append(result, GroupToResponse(group))
	}
	return result
}

// GroupMembersToResponseFromPtr 将GroupMember指针切片转换为GroupMemberResponse列表
func GroupMembersToResponseFromPtr(members []*model.GroupMember) []*GroupMemberResponse {
	result := make([]*GroupMemberResponse, 0, len(members))
	for _, member := range members {
		result = append(result, GroupMemberToResponse(member))
	}
	return result
}

// GroupAnnouncementsToResponseFromPtr 将GroupAnnouncement指针切片转换为GroupAnnouncementResponse列表
func GroupAnnouncementsToResponseFromPtr(announcements []*model.GroupAnnouncement) []*GroupAnnouncementResponse {
	result := make([]*GroupAnnouncementResponse, 0, len(announcements))
	for _, announcement := range announcements {
		result = append(result, GroupAnnouncementToResponse(announcement))
	}
	return result
}