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# -*- coding: utf-8 -*-
# Copyright 2018 Objectif Libre
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#
import csv
from cliff.formatters import base
import jsonpath_rw_ext as jp
from oslo_log import log
import yaml
LOG = log.getLogger(__name__)
class DataframeToCsvFormatter(base.ListFormatter):
"""Cliff formatter allowing to customize CSV report content."""
default_config = [
('Begin', '$.begin'),
('End', '$.end'),
('Metric Type', '$.service'),
('Qty', '$.volume'),
('Cost', '$.rating'),
('Project ID', '$.desc.project_id'),
('Resource ID', '$.desc.resource_id'),
('User ID', '$.desc.user_id'),
]
def _load_config(self, filename):
config = self.default_config
if filename:
try:
with open(filename, 'r') as fd:
yml_config = yaml.safe_load(fd.read())
if len(yml_config):
config = [(list(item.keys())[0], list(item.values())[0])
for item in yml_config]
else:
LOG.warning('Invalid config file {file}. Using default '
'configuration'.format(file=filename))
except (IOError, yaml.scanner.ScannerError) as err:
LOG.warning('Error: {err}. Using default '
'configuration'.format(err=err))
self.parsers = {}
for col, path in config:
self.parsers[col] = jp.parse(path)
return config
def add_argument_group(self, parser):
group = parser.add_argument_group('dataframe-to-csv formatter')
group.add_argument('--format-config-file',
type=str, dest='format_config',
help='Config file for the dict-to-csv formatter')
def _get_csv_row(self, config, json_item):
row = {}
for col, parser in self.parsers.items():
items = parser.find(json_item)
row[col] = items[0].value if items else ''
return row
def emit_list(self, column_names, data, stdout, parsed_args):
config = self._load_config(vars(parsed_args).get('format_config'))
self.writer = csv.DictWriter(stdout,
fieldnames=[elem[0] for elem in config])
self.writer.writeheader()
for dataframe in data:
rating_data = dataframe[3]
for item in rating_data:
item['begin'] = dataframe[0]
item['end'] = dataframe[1]
row = self._get_csv_row(config, item)
self.writer.writerow(row)
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