// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.

package models

import (
	"strings"
	"time"

	"github.com/Unknwon/com"

	"github.com/gogits/gogs/modules/base"
)

type NoticeType int

const (
	NOTICE_REPOSITORY NoticeType = iota + 1
)

// Notice represents a system notice for admin.
type Notice struct {
	ID          int64 `xorm:"pk autoincr"`
	Type        NoticeType
	Description string    `xorm:"TEXT"`
	Created     time.Time `xorm:"CREATED"`
}

// TrStr returns a translation format string.
func (n *Notice) TrStr() string {
	return "admin.notices.type_" + com.ToStr(n.Type)
}

// CreateNotice creates new system notice.
func CreateNotice(tp NoticeType, desc string) error {
	n := &Notice{
		Type:        tp,
		Description: desc,
	}
	_, err := x.Insert(n)
	return err
}

// CreateRepositoryNotice creates new system notice with type NOTICE_REPOSITORY.
func CreateRepositoryNotice(desc string) error {
	return CreateNotice(NOTICE_REPOSITORY, desc)
}

// CountNotices returns number of notices.
func CountNotices() int64 {
	count, _ := x.Count(new(Notice))
	return count
}

// Notices returns number of notices in given page.
func Notices(page, pageSize int) ([]*Notice, error) {
	notices := make([]*Notice, 0, pageSize)
	return notices, x.Limit(pageSize, (page-1)*pageSize).Desc("id").Find(&notices)
}

// DeleteNotice deletes a system notice by given ID.
func DeleteNotice(id int64) error {
	_, err := x.Id(id).Delete(new(Notice))
	return err
}

// DeleteNotices deletes all notices with ID from start to end (inclusive).
func DeleteNotices(start, end int64) error {
	sess := x.Where("id >= ?", start)
	if end > 0 {
		sess.And("id <= ?", end)
	}
	_, err := sess.Delete(new(Notice))
	return err
}

// DeleteNoticesByIDs deletes notices by given IDs.
func DeleteNoticesByIDs(ids []int64) error {
	if len(ids) == 0 {
		return nil
	}
	_, err := x.Where("id IN (" + strings.Join(base.Int64sToStrings(ids), ",") + ")").Delete(new(Notice))
	return err
}