private Task CreateFileWithInsertSqlStatements(Json2SqlTransformOptions transformOptions, string jsonContent)
{
var tasks = new List <Task>();
var rgx1JsonItem = new Regex(@"\}(?=(,)?(\r\n|\n))");
var jsonItemsMatches = rgx1JsonItem.Matches(jsonContent);
var jsonItemsCount = jsonItemsMatches.Count;
var maxLinesPer1InsertValuesSqlFile = transformOptions.MaxLinesPer1InsertValuesSqlFile;
int filesForCreatingCount = CalculateNewFilesCount(jsonItemsCount, maxLinesPer1InsertValuesSqlFile);
var fileNumberOffset = 2;
var sqlTablePath = $"{transformOptions.TableSchema}_{transformOptions.TableName}";
for (int i = 0; i < filesForCreatingCount; i++)
{
var targetSqlFileNameNumberPrefix = $"{(i + fileNumberOffset):000}";
var targetSqlFileNameNumberSuffix = filesForCreatingCount > 1 ? $"-{(i + 1):000}" : "";
var targetSqlFileName =
$"{targetSqlFileNameNumberPrefix}-insert-values-into-{sqlTablePath}{targetSqlFileNameNumberSuffix}.sql";
var targetSqlFilePath = Path.Combine(GenerateSqlDirectoryPath(transformOptions), targetSqlFileName);
var skip = i * maxLinesPer1InsertValuesSqlFile;
var insertStatement = _sqlBuilder
.BuildInsert(jsonContent, skip: skip, limit: maxLinesPer1InsertValuesSqlFile);
tasks.Add(_fileWriter.WriteAllTextAsync(targetSqlFilePath, insertStatement));
}
return(Task.WhenAll(tasks));
}
private Task CreateFileWithCreateTableSqlStatement(Json2SqlTransformOptions transformOptions)
{
var sqlTablePath = $"{transformOptions.TableSchema}_{transformOptions.TableName}";
var targetSqlFileName = $"001-create-table-{sqlTablePath}.sql";
var targetSqlFilePath = Path.Combine(GenerateSqlDirectoryPath(transformOptions), targetSqlFileName);
var createTableStatement = _sqlBuilder.BuildCreateTable();
return(_fileWriter.WriteAllTextAsync(targetSqlFilePath, createTableStatement));
}
public async Task <IOutcome> ExecuteAsync(Json2SqlTransformOptions transformOptions)
{
if (string.IsNullOrWhiteSpace(transformOptions.SourceJsonFilePath))
{
return(Outcomes.Failure().WithMessage("Source file path is incorrect"));
}
try
{
ThrowIfAnyFilesAlreadyExistsInDirectory(transformOptions);
InitSqlBuilder(transformOptions);
var jsonContent = await ReadJsonFile(transformOptions);
await CreateFileWithCreateTableSqlStatement(transformOptions);
await CreateFileWithInsertSqlStatements(transformOptions, jsonContent);
return(Outcomes.Success());
}
catch (Exception ex)
{
return(Outcomes.Failure().WithMessage(ex.Message));
}
}
private string GenerateSqlDirectoryPath(Json2SqlTransformOptions transformOptions)
{
return($@"{transformOptions.SourceDirectoryPath}\{transformOptions.SourceJsonFileName}");
}
private void InitSqlBuilder(Json2SqlTransformOptions transformOptions)
{
_sqlBuilder.SetSchema(transformOptions.TableSchema);
_sqlBuilder.SetTableName(transformOptions.TableName);
}
private Task <string> ReadJsonFile(Json2SqlTransformOptions transformOptions)
{
return(_fileReader.ReadAllTextAsync(transformOptions.SourceJsonFilePath));
}
private void ThrowIfAnyFilesAlreadyExistsInDirectory(Json2SqlTransformOptions transformOptions)
{
var directoryForSqlFiles = GenerateSqlDirectoryPath(transformOptions);
_fileWriter.ThrowIfAnyFilesAlreadyExistsInDirectory(directoryForSqlFiles);
}
