class CsvWriter:
"""
Csv Writer class
"""
@staticmethod
def _to_csv_format(val: any) -> str:
if isinstance(val, bool):
return str(val).lower()
if isinstance(val, dict):
return json.dumps(val)
if str(val) == 'True' or str(val) == 'False':
return str(val).lower()
if str(val).startswith('{') and str(val).endswith('}'):
try:
return json.dumps(json.loads(val))
except json.decoder.JSONDecodeError:
return json.dumps(ast.literal_eval(str(val)))
return str(val)
@staticmethod
def _to_cosmo_key(val: any) -> str:
if str(val) == ModelUtil.dt_id_key:
return ModelUtil.id_key
return val
@staticmethod
def write_twin_data(export_dir: str, file_name: str, query_result: QueryResult,
delimiter: str = ',', quote_char: str = '\"') -> None:
headers = set()
rows = []
for raw_data in query_result.result_set:
row = {}
# read all graph link properties
for i in range(len(raw_data)): # TODO for the moment its only a len 1 list with the node
row.update({CsvWriter._to_cosmo_key(k): CsvWriter._to_csv_format(v) for k, v in raw_data[i].properties.items()})
headers.update(row.keys())
rows.append(row)
output_file_name = f'{export_dir}/{file_name}.csv'
logger.debug(f"Writing CSV file {output_file_name}")
with open(output_file_name, 'w') as csvfile:
csv_writer = csv.DictWriter(csvfile, fieldnames=headers, delimiter=delimiter, quotechar=quote_char, quoting=csv.QUOTE_MINIMAL)
csv_writer.writeheader()
csv_writer.writerows(rows)
logger.debug(f"... CSV file {output_file_name} has been written")
@staticmethod
def write_relationship_data(export_dir: str, file_name: str, query_result: QueryResult, headers: list = [],
delimiter: str = ',', quote_char: str = '\"') -> None:
headers = {'source', 'target'}
rows = []
for raw_data in query_result.result_set:
row = {'source': raw_data[0], 'target': raw_data[1]}
row.update({k: CsvWriter._to_csv_format(v) for k, v in raw_data[2].properties.items()})
headers.update(row.keys())
rows.append(row)
output_file_name = export_dir + file_name + '.csv'
logger.debug(f"Writing CSV file {output_file_name}")
with open(output_file_name, 'w') as csvfile:
csv_writer = csv.DictWriter(csvfile, fieldnames=headers, delimiter=delimiter, quotechar=quote_char, quoting=csv.QUOTE_MINIMAL)
csv_writer.writeheader()
csv_writer.writerows(rows)
logger.debug(f"... CSV file {output_file_name} has been written")