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using Dapper;
using Microsoft.Data.Sqlite;
using Microsoft.Extensions.Options;
namespace CrupestApi.Commons.Crud;
public class CrudService<TEntity>
{
protected readonly TableInfo _table;
protected readonly IOptionsSnapshot<CrupestApiConfig> _crupestApiOptions;
protected readonly ILogger<CrudService<TEntity>> _logger;
public CrudService(IOptionsSnapshot<CrupestApiConfig> crupestApiOptions, ILogger<CrudService<TEntity>> logger)
{
_table = new TableInfo(typeof(TEntity));
_crupestApiOptions = crupestApiOptions;
_logger = logger;
}
public virtual string GetDbConnectionString()
{
var fileName = Path.Combine(_crupestApiOptions.Value.DataDir, "crupest-api.db");
return new SqliteConnectionStringBuilder()
{
DataSource = fileName,
Mode = SqliteOpenMode.ReadWriteCreate
}.ToString();
}
public async Task<SqliteConnection> CreateDbConnection()
{
var connection = new SqliteConnection(GetDbConnectionString());
await connection.OpenAsync();
return connection;
}
public virtual async Task DoInitializeDatabase(SqliteConnection connection)
{
await using var transaction = await connection.BeginTransactionAsync();
await connection.ExecuteAsync(_table.GenerateCreateTableSql(), transaction: transaction);
await transaction.CommitAsync();
}
public virtual async Task<SqliteConnection> EnsureDatabase()
{
var connection = await CreateDbConnection();
var exist = await _table.CheckExistence(connection);
if (!exist)
{
await DoInitializeDatabase(connection);
}
return connection;
}
public virtual async Task<IEnumerable<TEntity>> QueryAsync(WhereClause? where = null, OrderByClause? orderBy = null, int? skip = null, int? limit = null)
{
var connection = await EnsureDatabase();
DynamicParameters parameters;
var sql = _table.GenerateSelectSql(where, orderBy, skip, limit, out parameters);
return await connection.QueryAsync<TEntity>(sql, parameters);
}
}
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