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folder.go
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folder.go
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/*
* Omega is an advanced email service that supports Microsoft ActiveSync.
*
* Copyright (C) 2016, 2017 Kitae Kim <superkkt@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package backend
import (
"database/sql"
"errors"
"fmt"
"github.com/superkkt/omega/backend"
"github.com/superkkt/omega/database"
"github.com/superkkt/omega/database/mysql"
)
type FolderStorage struct {
c backend.Credential
queryer database.Queryer
dbName string
}
func (r *FolderStorage) Credential() backend.Credential {
return r.c
}
func (r *FolderStorage) GetFolders(lock database.LockMode) (folders []backend.Folder, err error) {
f := func(tx *sql.Tx) error {
qry := "SELECT `id`, `parent_id`, `name`, `type` "
qry += fmt.Sprintf("FROM `%v`.`folder` ", r.dbName)
qry += "WHERE user_id = ? AND available = true"
qry += mysql.GetLockCmd(lock)
rows, err := tx.Query(qry, r.c.UserUID())
if err != nil {
return err
}
defer rows.Close()
for rows.Next() {
var t string
v := backend.Folder{}
if err := rows.Scan(&v.ID, &v.ParentID, &v.Name, &t); err != nil {
return err
}
v.Type = ConvToBackendFolderType(t)
folders = append(folders, v)
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return nil, err
}
return folders, nil
}
func (r *FolderStorage) GetFolderByID(folderID uint64, lock database.LockMode) (v backend.Folder, err error) {
f := func(tx *sql.Tx) error {
qry := "SELECT `id`, `parent_id`, `name`, `type` "
qry += fmt.Sprintf("FROM `%v`.`folder` ", r.dbName)
qry += "WHERE id = ? and user_id = ? and available = true"
qry += mysql.GetLockCmd(lock)
var t string
if err := tx.QueryRow(qry, folderID, r.c.UserUID()).Scan(&v.ID, &v.ParentID, &v.Name, &t); err != nil {
return err
}
v.Type = ConvToBackendFolderType(t)
return nil
}
if err := r.queryer.Query(f); err != nil {
return backend.Folder{}, err
}
return v, nil
}
func (r *FolderStorage) GetFolderByName(parentID uint64, name string, recursive bool, lock database.LockMode) (folders []backend.Folder, err error) {
if recursive {
return nil, errors.New("A true value of recursive is not supported.")
}
f := func(tx *sql.Tx) error {
qry := "SELECT `id`, `parent_id`, `name`, `type` "
qry += fmt.Sprintf("FROM `%v`.`folder` ", r.dbName)
qry += "WHERE user_id = ? AND parent_id = ? AND name = ? AND available = true"
qry += mysql.GetLockCmd(lock)
rows, err := tx.Query(qry, r.c.UserUID(), parentID, name)
if err != nil {
return err
}
defer rows.Close()
for rows.Next() {
var t string
v := backend.Folder{}
if err := rows.Scan(&v.ID, &v.ParentID, &v.Name, &t); err != nil {
return err
}
v.Type = ConvToBackendFolderType(t)
folders = append(folders, v)
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return nil, err
}
return folders, nil
}
func (r *FolderStorage) GetFolderByType(t backend.FolderType, lock database.LockMode) (folders []backend.Folder, err error) {
f := func(tx *sql.Tx) error {
qry := "SELECT `id`, `parent_id`, `name`, `type` "
qry += "FROM `" + r.dbName + "`.`folder` "
qry += "WHERE user_id = ? AND `type` = ? AND available = true"
qry += mysql.GetLockCmd(lock)
rows, err := tx.Query(qry, r.c.UserUID(), ConvToFolderTypeString(t))
if err != nil {
return err
}
defer rows.Close()
for rows.Next() {
var t string
v := backend.Folder{}
if err := rows.Scan(&v.ID, &v.ParentID, &v.Name, &t); err != nil {
return err
}
v.Type = ConvToBackendFolderType(t)
folders = append(folders, v)
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return nil, err
}
return folders, nil
}
func (r *FolderStorage) GetFolderByPath(path []string, lock database.LockMode) (folder backend.Folder, err error) {
return backend.Folder{}, errors.New("unimplemented function")
}
//AddFolder should add a new folder history.
func (r *FolderStorage) AddFolder(parentID uint64, name string, t backend.FolderType) (folderID uint64, err error) {
f := func(tx *sql.Tx) error {
var qry string
// If parent folder is not root.
if parentID != 0 {
// Check whether there is an existing parent folder, and then return database.ErrNotFound if it doesn't exist.
qry = fmt.Sprintf("SELECT `id` FROM `%v`.`folder` ", r.dbName)
qry += "WHERE id = ? AND user_id = ? AND available = TRUE "
qry += "LOCK IN SHARE MODE"
var id uint64
if err := tx.QueryRow(qry, parentID, r.c.UserUID()).Scan(&id); err != nil {
return err
}
}
// Check whether there is an existing folder that has same name, and then return database.ErrDuplicated if it already exists.
qry = fmt.Sprintf("SELECT COUNT(*) FROM `%v`.`folder` ", r.dbName)
qry += "WHERE user_id = ? AND parent_id = ? AND name = ? AND available = TRUE "
qry += "FOR UPDATE"
var count uint64
if err := tx.QueryRow(qry, r.c.UserUID(), parentID, name).Scan(&count); err != nil {
return err
}
if count > 0 {
return database.ErrDuplicated
}
qry = fmt.Sprintf("INSERT INTO `%v`.`folder`(user_id, parent_id, name, `type`) ", r.dbName)
qry += "VALUES(?, ?, ?, ?)"
result, err := tx.Exec(qry, r.c.UserUID(), parentID, name, ConvToFolderTypeString(t))
if err != nil {
return err
}
fid, err := result.LastInsertId()
if err != nil {
return err
}
folderID = uint64(fid)
qry = fmt.Sprintf("INSERT INTO `%v`.`folder_history`(user_id, folder_id, operation, parent_id, name) ", r.dbName)
qry += "VALUES(?, ?, 'ADD', ?, ?)"
if _, err := tx.Exec(qry, r.c.UserUID(), folderID, parentID, name); err != nil {
return err
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return 0, err
}
return folderID, nil
}
// DeleteFolder should add a new folder history.
func (r *FolderStorage) DeleteFolder(folderID uint64) error {
f := func(tx *sql.Tx) error {
var parentID uint64
var name string
qry := fmt.Sprintf("SELECT `parent_id`, `name` FROM `%v`.`folder` ", r.dbName)
qry += "WHERE id = ? and user_id = ? AND available = TRUE FOR UPDATE"
if err := tx.QueryRow(qry, folderID, r.c.UserUID()).Scan(&parentID, &name); err != nil {
return err
}
qry = fmt.Sprintf("UPDATE `%v`.`folder` SET available = FALSE WHERE id = ?", r.dbName)
if _, err := tx.Exec(qry, folderID); err != nil {
return err
}
qry = fmt.Sprintf("INSERT INTO `%v`.`folder_history`(user_id, folder_id, operation, parent_id, name) ", r.dbName)
qry += "VALUES(?, ?, 'DEL', ?, ?)"
if _, err := tx.Exec(qry, r.c.UserUID(), folderID, parentID, name); err != nil {
return err
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return err
}
return nil
}
// UpdateFolder should add a new folder history.
func (r *FolderStorage) UpdateFolder(folderID, newParentID uint64, newName string) error {
f := func(tx *sql.Tx) error {
var qry string
var id uint64
// If parent folder is not root.
if newParentID != 0 {
// Check whether there is an existing parent folder, and then return database.ErrNotFound if it doesn't exist.
qry = fmt.Sprintf("SELECT COUNT(*) FROM `%v`.`folder` ", r.dbName)
qry += "WHERE user_id = ? AND parent_id = ? AND available = TRUE "
qry += "LOCK IN SHARE MODE"
if err := tx.QueryRow(qry, r.c.UserUID(), newParentID).Scan(&id); err != nil {
return err
}
}
// Check whether there is an existing folder whose name is newName under the new parent folder,
// then return database.ErrDuplicated if it already exists.
qry = fmt.Sprintf("SELECT COUNT(*) FROM `%v`.`folder` ", r.dbName)
qry += "WHERE user_id = ? AND parent_id = ? AND name = ? AND available = TRUE "
qry += "FOR UPDATE"
var count uint64
if err := tx.QueryRow(qry, r.c.UserUID(), newParentID, newName).Scan(&count); err != nil {
return err
}
if count > 0 {
return database.ErrDuplicated
}
// Check whether there is an existing folder.
qry = fmt.Sprintf("SELECT `id` FROM `%v`.`folder` ", r.dbName)
qry += "WHERE id = ? AND user_id = ? AND available = TRUE "
qry += "FOR UPDATE"
if err := tx.QueryRow(qry, folderID, r.c.UserUID()).Scan(&id); err != nil {
return err
}
qry = fmt.Sprintf("UPDATE `%v`.`folder` SET parent_id = ?, name = ? WHERE id = ?", r.dbName)
result, err := tx.Exec(qry, newParentID, newName, folderID)
if err != nil {
return err
}
n, err := result.RowsAffected()
if err != nil {
return err
}
if n == 0 {
return database.ErrNotFound
}
qry = fmt.Sprintf("INSERT INTO `%v`.`folder_history`(user_id, folder_id, operation, parent_id, name) ", r.dbName)
qry += "VALUES(?, ?, 'UPDATE', ?, ?)"
if _, err := tx.Exec(qry, r.c.UserUID(), folderID, newParentID, newName); err != nil {
return err
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return err
}
return nil
}
func (r *FolderStorage) GetLastFolderHistory(folderID uint64, lock database.LockMode) (history backend.FolderHistory, err error) {
f := func(tx *sql.Tx) error {
qry := "SELECT A.`id`, A.`operation`, A.`parent_id`, A.`name`, A.`timestamp`, B.`id`, B.`type` "
qry += "FROM `" + r.dbName + "`.`folder_history` A INNER JOIN `" + r.dbName + "`.`folder` B "
qry += "ON A.folder_id = B.id "
qry += "WHERE B.`id` = ? AND A.user_id = ? "
args := make([]interface{}, 0)
args = append(args, folderID, r.c.UserUID())
qry += "ORDER BY A.`id` DESC LIMIT 1"
qry += mysql.GetLockCmd(lock)
v := FolderHistory{}
var foe, fte string
var parentID sql.NullInt64
if err := tx.QueryRow(qry, args...).Scan(&v.id, &foe, &parentID,
&v.value.Name, &v.timestamp, &v.value.ID, &fte); err != nil {
return err
}
v.operation = ConvToBackendFolderOperation(foe)
v.value.Type = ConvToBackendFolderType(fte)
if parentID.Valid {
v.value.ParentID = uint64(parentID.Int64)
}
history = &v
return nil
}
if err := r.queryer.Query(f); err != nil {
return nil, err
}
return history, nil
}
// offset is a folder history ID as a starting position. desc means descending order if it is true,
// otherwise ascending order. Zero offset means the last item if desc is true. Zero limit means infinite.
func (r *FolderStorage) GetFolderHistories(offset, limit uint64, desc bool, lock database.LockMode) (histories []backend.FolderHistory, err error) {
f := func(tx *sql.Tx) error {
qry := "SELECT A.`id`, A.`operation`, A.`parent_id`, A.`name`, A.`timestamp`, B.`id`, B.`type` "
qry += "FROM `" + r.dbName + "`.`folder_history` A INNER JOIN `" + r.dbName + "`.`folder` B "
qry += "ON A.folder_id = B.id "
qry += "WHERE A.user_id = ? "
args := make([]interface{}, 0)
args = append(args, r.c.UserUID())
if offset != 0 {
if desc {
qry += "AND A.`id` <= ? "
} else {
qry += "AND A.`id` >= ? "
}
args = append(args, offset)
}
if desc {
qry += "ORDER BY A.`id` DESC "
} else {
qry += "ORDER BY A.`id` ASC "
}
if limit != 0 {
qry += "LIMIT ?"
args = append(args, limit)
}
qry += mysql.GetLockCmd(lock)
rows, err := tx.Query(qry, args...)
if err != nil {
return err
}
defer rows.Close()
for rows.Next() {
v := FolderHistory{}
var foe, fte string
var parentID sql.NullInt64
if err := rows.Scan(&v.id, &foe, &parentID,
&v.value.Name, &v.timestamp, &v.value.ID, &fte); err != nil {
return err
}
v.operation = ConvToBackendFolderOperation(foe)
v.value.Type = ConvToBackendFolderType(fte)
if parentID.Valid {
v.value.ParentID = uint64(parentID.Int64)
}
histories = append(histories, &v)
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return nil, err
}
return histories, nil
}
func (r *FolderStorage) DeleteFolderHistory(historyID uint64) error {
f := func(tx *sql.Tx) error {
qry := fmt.Sprintf("DELETE FROM `%v`.`folder_history` WHERE id = ? and user_id = ?", r.dbName)
result, err := tx.Exec(qry, historyID, r.c.UserUID())
if err != nil {
return err
}
n, err := result.RowsAffected()
if err != nil {
return err
}
if n == 0 {
return database.ErrNotFound
}
return nil
}
if err := r.queryer.Query(f); err != nil {
return err
}
return nil
}