Radarr/NzbDrone.Core/Datastore/BasicRepository.cs

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using System;
using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using Marr.Data;
using Marr.Data.QGen;
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using NzbDrone.Common.Messaging;
using NzbDrone.Core.Datastore.Events;
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namespace NzbDrone.Core.Datastore
{
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public interface IBasicRepository<TModel> where TModel : ModelBase, new()
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{
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IEnumerable<TModel> All();
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int Count();
TModel Get(int id);
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IEnumerable<TModel> Get(IEnumerable<int> ids);
TModel SingleOrDefault();
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TModel Insert(TModel model);
TModel Update(TModel model);
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TModel Upsert(TModel model);
void Delete(int id);
void Delete(TModel model);
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void InsertMany(IList<TModel> model);
void UpdateMany(IList<TModel> model);
void DeleteMany(List<TModel> model);
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void Purge();
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bool HasItems();
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void DeleteMany(IEnumerable<int> ids);
void SetFields(TModel model, params Expression<Func<TModel, object>>[] properties);
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TModel Single();
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}
public class BasicRepository<TModel> : IBasicRepository<TModel> where TModel : ModelBase, new()
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{
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private readonly IDatabase _database;
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private readonly IMessageAggregator _messageAggregator;
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//TODO: add assertion to make sure model properly mapped
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private IDataMapper DataMapper
{
get { return _database.DataMapper; }
}
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public BasicRepository(IDatabase database, IMessageAggregator messageAggregator)
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{
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_database = database;
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_messageAggregator = messageAggregator;
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}
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protected QueryBuilder<TModel> Query
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{
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get { return DataMapper.Query<TModel>(); }
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}
protected void Delete(Expression<Func<TModel, bool>> filter)
{
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DataMapper.Delete(filter);
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}
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public IEnumerable<TModel> All()
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{
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return DataMapper.Query<TModel>().ToList();
}
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public int Count()
{
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return DataMapper.Query<TModel>().GetRowCount();
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}
public TModel Get(int id)
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{
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return DataMapper.Query<TModel>().Single(c => c.Id == id);
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}
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public IEnumerable<TModel> Get(IEnumerable<int> ids)
{
var idList = ids.ToList();
var result = Query.Where(String.Format("Id IN ({0})", String.Join(",", idList))).ToList();
var resultCount = result.Count;
if (resultCount != idList.Count || result.Select(r => r.Id).Distinct().Count() != resultCount)
throw new InvalidOperationException("Unexpected result from query");
return result;
}
public TModel SingleOrDefault()
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{
return All().SingleOrDefault();
}
public TModel Single()
{
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return All().Single();
}
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public TModel Insert(TModel model)
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{
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if (model.Id != 0)
{
throw new InvalidOperationException("Can't insert model with existing ID");
}
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DataMapper.Insert(model);
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_messageAggregator.PublishEvent(new ModelEvent<TModel>(model, ModelEvent<TModel>.RepositoryAction.Created));
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return model;
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}
public TModel Update(TModel model)
{
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if (model.Id == 0)
{
throw new InvalidOperationException("Can't update model with ID 0");
}
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DataMapper.Update(model, c => c.Id == model.Id);
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return model;
}
public void Delete(TModel model)
{
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DataMapper.Delete<TModel>(c => c.Id == model.Id);
}
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public void InsertMany(IList<TModel> models)
{
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foreach (var model in models)
{
Insert(model);
}
}
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public void UpdateMany(IList<TModel> models)
{
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foreach (var model in models)
{
Update(model);
}
}
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public void DeleteMany(List<TModel> models)
{
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models.ForEach(Delete);
}
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public TModel Upsert(TModel model)
{
if (model.Id == 0)
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{
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Insert(model);
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return model;
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}
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Update(model);
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return model;
}
public void Delete(int id)
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{
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DataMapper.Delete<TModel>(c => c.Id == id);
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}
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public void DeleteMany(IEnumerable<int> ids)
{
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ids.ToList().ForEach(Delete);
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}
public void Purge()
{
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DataMapper.Delete<TModel>(c => c.Id > -1);
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}
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public bool HasItems()
{
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return Count() > 0;
}
public void SetFields(TModel model, params Expression<Func<TModel, object>>[] properties)
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{
if (model.Id == 0)
{
throw new InvalidOperationException("Attempted to updated model without ID");
}
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DataMapper.Update<TModel>()
.Where(c => c.Id == model.Id)
.ColumnsIncluding(properties)
.Entity(model)
.Execute();
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}
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}
}