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using System.Data;
using System.Text.Json;
using Dapper;
namespace CrupestApi.Commons.Crud;
// TODO: Register this.
public class CrudService<TEntity> : IDisposable where TEntity : class
{
protected readonly TableInfo _table;
protected readonly string? _connectionName;
protected readonly IDbConnection _dbConnection;
protected readonly EntityJsonHelper _jsonHelper;
private readonly ILogger<CrudService<TEntity>> _logger;
public CrudService(string? connectionName, ITableInfoFactory tableInfoFactory, IDbConnectionFactory dbConnectionFactory, ILoggerFactory loggerFactory)
{
_connectionName = connectionName;
_table = tableInfoFactory.Get(typeof(TEntity));
_dbConnection = dbConnectionFactory.Get(_connectionName);
_jsonHelper = new EntityJsonHelper(_table);
_logger = loggerFactory.CreateLogger<CrudService<TEntity>>();
if (!_table.CheckExistence(_dbConnection))
{
DoInitializeDatabase(_dbConnection);
}
}
public virtual void DoInitializeDatabase(IDbConnection connection)
{
using var transaction = connection.BeginTransaction();
connection.Execute(_table.GenerateCreateTableSql(), transaction: transaction);
transaction.Commit();
}
public void Dispose()
{
_dbConnection.Dispose();
}
public List<TEntity> Select(IWhereClause? filter)
{
return _table.Select(_dbConnection, filter).Cast<TEntity>().ToList();
}
public bool Exists(IWhereClause? filter)
{
return _table.SelectCount(_dbConnection, filter) > 0;
}
public int Count(IWhereClause? filter)
{
return _table.SelectCount(_dbConnection, filter);
}
// Return the key.
public object Insert(IInsertClause insertClause)
{
return _table.Insert(_dbConnection, insertClause);
}
// Return the key.
public object Insert(TEntity entity)
{
return _table.Insert(_dbConnection, _table.GenerateInsertClauseFromEntity(entity));
}
public int Update(IUpdateClause updateClause, IWhereClause? filter)
{
return _table.Update(_dbConnection, filter, updateClause);
}
public int Delete(IWhereClause? filter)
{
return _table.Delete(_dbConnection, filter);
}
public TEntity SelectByKey(object key)
{
return Select(WhereClause.Create().Eq(_table.KeyColumn.ColumnName, key)).Single();
}
public List<JsonDocument> SelectAsJson(IWhereClause? filter)
{
return Select(filter).Select(e => _jsonHelper.ConvertEntityToJson(e)).ToList();
}
public JsonDocument SelectAsJsonByKey(object key)
{
return SelectAsJson(WhereClause.Create().Eq(_table.KeyColumn.ColumnName, key)).Single();
}
public object InsertFromJson(JsonDocument? json)
{
// TODO: Implement this.
throw new NotImplementedException();
}
}
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