private void Delete(Prediction prediction)
{
using var command = _connection.CreateCommand();
command.Connection = _connection;
command.CommandText =
$"delete from {Prediction.GetTableName()} " +
$"where {Prediction.GetZodiacColumnName()} = :zodiac_id " +
$"and {Prediction.GetTimeIntervalColumnName()} = :interval_id;";
command.Parameters.AddWithValue("zodiac_id", prediction.Zodiac.Id);
command.Parameters.AddWithValue("interval_id", prediction.TimeInterval.Id);
Console.WriteLine("Execute SQL: " + command.CommandText);
command.ExecuteNonQuery();
}
public void SaveOrUpdate(Prediction prediction)
{
if (IsPredictionAlreadySaved(prediction))
{
Update(prediction);
}
else
{
using var command = _connection.CreateCommand();
command.Connection = _connection;
command.CommandText =
$"insert into {Prediction.GetTableName()}({Prediction.GetZodiacColumnName()}, {Prediction.GetTimeIntervalColumnName()}, {Prediction.GetTextColumnName()}) " +
"values (:zodiac_id, :interval_id, :text);";
command.Parameters.AddWithValue("zodiac_id", prediction.Zodiac.Id);
command.Parameters.AddWithValue("interval_id", prediction.TimeInterval.Id);
command.Parameters.AddWithValue("text", prediction.Text);
Console.WriteLine("Execute SQL: " + command.CommandText);
command.ExecuteNonQuery();
}
}
private SQLiteDataReader GetPredictionDataReader(Zodiac zodiac, TimeInterval timeInterval)
{
using var command = _connection.CreateCommand();
command.Connection = _connection;
command.CommandText =
$"select {Prediction.GetZodiacColumnName()}, {Prediction.GetTimeIntervalColumnName()}, {Prediction.GetTextColumnName()} from {Prediction.GetTableName()} " +
$"where {Prediction.GetZodiacColumnName()} = :zodiac_id " +
$"and {Prediction.GetTimeIntervalColumnName()} = :interval_id;";
command.Parameters.AddWithValue("zodiac_id", zodiac.Id);
command.Parameters.AddWithValue("interval_id", timeInterval.Id);
Console.WriteLine("Execute SQL: " + command.CommandText);
return(command.ExecuteReader());
}