DocSpace-buildtools/common/services/ASC.Data.Backup/Service/BackupService.cs

/*
 *
 * (c) Copyright Ascensio System Limited 2010-2020
 *
 * This program is freeware. You can redistribute it and/or modify it under the terms of the GNU 
 * General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html). 
 * In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that 
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 *
 * THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
 *
 * You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*/


using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.ServiceModel;

using ASC.Common;
using ASC.Common.Logging;
using ASC.Core.Common.Contracts;
using ASC.Data.Backup.EF.Model;
using ASC.Data.Backup.Storage;
using ASC.Data.Backup.Utils;

using Microsoft.Extensions.Options;

using Newtonsoft.Json;

namespace ASC.Data.Backup.Service
{
    internal class BackupService : IBackupService
    {
        private ILog Log { get; set; }
        private BackupStorageFactory BackupStorageFactory { get; set; }
        private BackupWorker BackupWorker { get; set; }
        public BackupRepository BackupRepository { get; }

        public BackupService(
            IOptionsMonitor<ILog> options,
            BackupStorageFactory backupStorageFactory,
            BackupWorker backupWorker,
            BackupRepository backupRepository)
        {
            Log = options.CurrentValue;
            BackupStorageFactory = backupStorageFactory;
            BackupWorker = backupWorker;
            BackupRepository = backupRepository;
        }

        public BackupProgress StartBackup(StartBackupRequest request)
        {
            var progress = BackupWorker.StartBackup(request);
            if (!string.IsNullOrEmpty(progress.Error))
            {
                throw new FaultException();
            }
            return progress;
        }

        public BackupProgress GetBackupProgress(int tenantId)
        {
            var progress = BackupWorker.GetBackupProgress(tenantId);
            if (progress != null && !string.IsNullOrEmpty(progress.Error))
            {
                BackupWorker.ResetBackupError(tenantId);
                throw new FaultException();

            }
            return progress;
        }

        public void DeleteBackup(Guid id)
        {
            var backupRecord = BackupRepository.GetBackupRecord(id);
            BackupRepository.DeleteBackupRecord(backupRecord.Id);

            var storage = BackupStorageFactory.GetBackupStorage(backupRecord);
            if (storage == null) return;
            storage.Delete(backupRecord.StoragePath);
        }

        public void DeleteAllBackups(int tenantId)
        {
            foreach (var backupRecord in BackupRepository.GetBackupRecordsByTenantId(tenantId))
            {
                try
                {
                    BackupRepository.DeleteBackupRecord(backupRecord.Id);
                    var storage = BackupStorageFactory.GetBackupStorage(backupRecord);
                    if (storage == null) continue;
                    storage.Delete(backupRecord.StoragePath);
                }
                catch (Exception error)
                {
                    Log.Warn("error while removing backup record: {0}", error);
                }
            }
        }

        public List<BackupHistoryRecord> GetBackupHistory(int tenantId)
        {
            var backupHistory = new List<BackupHistoryRecord>();
            foreach (var record in BackupRepository.GetBackupRecordsByTenantId(tenantId))
            {
                var storage = BackupStorageFactory.GetBackupStorage(record);
                if (storage == null) continue;
                if (storage.IsExists(record.StoragePath))
                {
                    backupHistory.Add(new BackupHistoryRecord
                    {
                        Id = record.Id,
                        FileName = record.Name,
                        StorageType = record.StorageType,
                        CreatedOn = record.CreatedOn,
                        ExpiresOn = record.ExpiresOn
                    });
                }
                else
                {
                    BackupRepository.DeleteBackupRecord(record.Id);
                }
            }
            return backupHistory;
        }

        public BackupProgress StartTransfer(StartTransferRequest request)
        {
            var progress = BackupWorker.StartTransfer(request.TenantId, request.TargetRegion, request.BackupMail, request.NotifyUsers);
            if (!string.IsNullOrEmpty(progress.Error))
            {
                throw new FaultException();
            }
            return progress;
        }

        public BackupProgress GetTransferProgress(int tenantID)
        {
            var progress = BackupWorker.GetTransferProgress(tenantID);
            if (!string.IsNullOrEmpty(progress.Error))
            {
                throw new FaultException();
            }
            return progress;
        }

        public BackupProgress StartRestore(StartRestoreRequest request)
        {
            if (request.StorageType == BackupStorageType.Local)
            {
                if (string.IsNullOrEmpty(request.FilePathOrId) || !File.Exists(request.FilePathOrId))
                {
                    throw new FileNotFoundException();
                }
            }

            if (!request.BackupId.Equals(Guid.Empty))
            {
                var backupRecord = BackupRepository.GetBackupRecord(request.BackupId);
                if (backupRecord == null)
                {
                    throw new FileNotFoundException();
                }

                request.FilePathOrId = backupRecord.StoragePath;
                request.StorageType = backupRecord.StorageType;
                request.StorageParams = JsonConvert.DeserializeObject<Dictionary<string, string>>(backupRecord.StorageParams);
            }

            var progress = BackupWorker.StartRestore(request);
            if (!string.IsNullOrEmpty(progress.Error))
            {
                throw new FaultException();
            }
            return progress;
        }

        public BackupProgress GetRestoreProgress(int tenantId)
        {
            var progress = BackupWorker.GetRestoreProgress(tenantId);
            if (progress != null && !string.IsNullOrEmpty(progress.Error))
            {
                BackupWorker.ResetRestoreError(tenantId);
                throw new FaultException();
            }
            return progress;
        }

        public string GetTmpFolder()
        {
            return BackupWorker.TempFolder;
        }

        public List<TransferRegion> GetTransferRegions()
        {
            var webConfigs = BackupConfigurationSection.GetSection().WebConfigs;
            return webConfigs
                .Cast<WebConfigElement>()
                .Select(configElement =>
                    {
                        var config = ConfigurationProvider.Open(PathHelper.ToRootedConfigPath(configElement.Path));
                        var baseDomain = config.AppSettings.Settings["core.base-domain"].Value;
                        return new TransferRegion
                        {
                            Name = configElement.Region,
                            BaseDomain = baseDomain,
                            IsCurrentRegion = configElement.Region.Equals(webConfigs.CurrentRegion, StringComparison.InvariantCultureIgnoreCase)
                        };
                    })
                .ToList();
        }

        public void CreateSchedule(CreateScheduleRequest request)
        {
            BackupRepository.SaveBackupSchedule(
                new BackupSchedule()
                {
                    TenantId = request.TenantId,
                    Cron = request.Cron,
                    BackupMail = request.BackupMail,
                    BackupsStored = request.NumberOfBackupsStored,
                    StorageType = request.StorageType,
                    StorageBasePath = request.StorageBasePath,
                    StorageParams = JsonConvert.SerializeObject(request.StorageParams)
                });
        }

        public void DeleteSchedule(int tenantId)
        {
            BackupRepository.DeleteBackupSchedule(tenantId);
        }

        public ScheduleResponse GetSchedule(int tenantId)
        {
            var schedule = BackupRepository.GetBackupSchedule(tenantId);
            return schedule != null
                       ? new ScheduleResponse
                       {
                           StorageType = schedule.StorageType,
                           StorageBasePath = schedule.StorageBasePath,
                           BackupMail = schedule.BackupMail,
                           NumberOfBackupsStored = schedule.BackupsStored,
                           Cron = schedule.Cron,
                           LastBackupTime = schedule.LastBackupTime,
                           StorageParams = JsonConvert.DeserializeObject<Dictionary<string, string>>(schedule.StorageParams)
                       }
                       : null;
        }
    }
    public static class BackupServiceExtension
    {
        public static DIHelper AddBackupService(this DIHelper services)
        {
            services.TryAddScoped<BackupService>();
            return services;
        }
    }
}