DocSpace-client/common/ASC.Core.Common/Data/DbQuotaService.cs

/*
 *
 * (c) Copyright Ascensio System Limited 2010-2018
 *
 * 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). 
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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
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*/


using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using ASC.Core.Common.EF;
using ASC.Core.Tenants;

namespace ASC.Core.Data
{
    class DbQuotaService : IQuotaService
    {
        private Expression<Func<DbQuota, TenantQuota>> FromDbQuotaToTenantQuota { get; set; }
        private Expression<Func<DbQuotaRow, TenantQuotaRow>> FromDbQuotaRowToTenantQuotaRow { get; set; }
        private CoreDbContext CoreDbContext { get; set; }

        public DbQuotaService(DbContextManager<CoreDbContext> dbContextManager)
        {
            CoreDbContext = dbContextManager.Value;
            FromDbQuotaToTenantQuota = r => new TenantQuota()
            {
                Name = r.Name,
                ActiveUsers = r.ActiveUsers != 0 ? r.ActiveUsers : int.MaxValue,
                AvangateId = r.AvangateId,
                Features = r.Features,
                MaxFileSize = GetInBytes(r.MaxFileSize),
                MaxTotalSize = GetInBytes(r.MaxTotalSize),
                Price = r.Price,
                Price2 = r.Price2,
                Visible = r.Visible
            };

            FromDbQuotaRowToTenantQuotaRow = r => new TenantQuotaRow
            {
                Counter = r.Counter,
                Path = r.Path,
                Tag = r.Tag,
                Tenant = r.Tenant
            };
        }


        public IEnumerable<TenantQuota> GetTenantQuotas()
        {
            return
                CoreDbContext.Quotas
                .Select(FromDbQuotaToTenantQuota)
                .ToList();
        }

        public TenantQuota GetTenantQuota(int id)
        {
            return
                 CoreDbContext.Quotas
                 .Where(r => r.Tenant == id)
                .Select(FromDbQuotaToTenantQuota)
                .SingleOrDefault();
        }

        public TenantQuota SaveTenantQuota(TenantQuota quota)
        {
            if (quota == null) throw new ArgumentNullException("quota");

            var dbQuota = new DbQuota
            {
                Tenant = quota.Id,
                Name = quota.Name,
                MaxFileSize = GetInMBytes(quota.MaxFileSize),
                MaxTotalSize = GetInMBytes(quota.MaxTotalSize),
                ActiveUsers = quota.ActiveUsers,
                Features = quota.Features,
                Price = quota.Price,
                Price2 = quota.Price2,
                AvangateId = quota.AvangateId,
                Visible = quota.Visible
            };

            CoreDbContext.Quotas.Add(dbQuota);
            CoreDbContext.SaveChanges();

            return quota;
        }

        public void RemoveTenantQuota(int id)
        {
            using var tr = CoreDbContext.Database.BeginTransaction();
            var d = CoreDbContext.Quotas
                 .Where(r => r.Tenant == id)
                 .SingleOrDefault();

            CoreDbContext.Quotas.Remove(d);
            CoreDbContext.SaveChanges();

            tr.Commit();
        }


        public void SetTenantQuotaRow(TenantQuotaRow row, bool exchange)
        {
            if (row == null) throw new ArgumentNullException("row");

            using var tx = CoreDbContext.Database.BeginTransaction();

            var counter = CoreDbContext.QuotaRows
                .Where(r => r.Path == row.Path && r.Tenant == row.Tenant)
                .Select(r => r.Counter)
                .FirstOrDefault();

            var dbQuotaRow = new DbQuotaRow
            {
                Tenant = row.Tenant,
                Path = row.Path,
                Counter = exchange ? counter + row.Counter : row.Counter,
                Tag = row.Tag,
                LastModified = DateTime.UtcNow
            };

            CoreDbContext.QuotaRows.Add(dbQuotaRow);
            CoreDbContext.SaveChanges();

            tx.Commit();
        }

        public IEnumerable<TenantQuotaRow> FindTenantQuotaRows(TenantQuotaRowQuery query)
        {
            if (query == null) throw new ArgumentNullException("query");

            IQueryable<DbQuotaRow> q = CoreDbContext.QuotaRows;


            if (query.Tenant != Tenant.DEFAULT_TENANT)
            {
                q = q.Where(r => r.Tenant == query.Tenant);
            }
            if (!string.IsNullOrEmpty(query.Path))
            {
                q = q.Where(r => r.Path == query.Path);
            }

            if (query.LastModified != default)
            {
                q = q.Where(r => r.LastModified >= query.LastModified);
            }


            return q.Select(FromDbQuotaRowToTenantQuotaRow).ToList();
        }


        private static long GetInBytes(long bytes)
        {
            const long MB = 1024 * 1024;
            return bytes < MB ? bytes * MB : bytes;
        }

        private static long GetInMBytes(long bytes)
        {
            const long MB = 1024 * 1024;
            return bytes < MB * MB ? bytes / MB : bytes;
        }
    }
}