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/*
* Copyright (c) 2022 Vaughn Nugent
*
* Library: VNLib
* Package: VNLib.Plugins.Extensions.Data
* File: ProtectedDbStore.cs
*
* ProtectedDbStore.cs is part of VNLib.Plugins.Extensions.Data which is part of the larger
* VNLib collection of libraries and utilities.
*
* VNLib.Plugins.Extensions.Data is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* VNLib.Plugins.Extensions.Data 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see https://www.gnu.org/licenses/.
*/
using System;
using System.Linq;
using VNLib.Plugins.Extensions.Data.Abstractions;
namespace VNLib.Plugins.Extensions.Data
{
#nullable enable
/// <summary>
/// A data store that provides unique identities and protections based on an entity that has an owner <see cref="IUserEntity"/>
/// </summary>
public abstract class ProtectedDbStore<TEntity> : DbStore<TEntity> where TEntity : class, IDbModel, IUserEntity
{
///<inheritdoc/>
protected override IQueryable<TEntity> GetCollectionQueryBuilder(TransactionalDbContext context, params string[] constraints)
{
string userId = constraints[0];
//Query items for the user and its id
return from item in context.Set<TEntity>()
where item.UserId == userId
orderby item.Created descending
select item;
}
/// <summary>
/// Gets a single item contrained by a given user-id and item id
/// </summary>
/// <param name="context"></param>
/// <param name="constraints"></param>
/// <returns></returns>
protected override IQueryable<TEntity> GetSingleQueryBuilder(TransactionalDbContext context, params string[] constraints)
{
string key = constraints[0];
string userId = constraints[1];
//Query items for the user and its id
return from item in context.Set<TEntity>()
where item.Id == key && item.UserId == userId
select item;
}
///<inheritdoc/>
protected override IQueryable<TEntity> GetSingleQueryBuilder(TransactionalDbContext context, TEntity record)
{
return this.GetSingleQueryBuilder(context, record.Id, record.UserId);
}
}
}
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