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""" |
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BasicNeeds - useful functions library |
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This library has functions useful to keep main logic short and simple |
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""" |
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# package to handle date and times |
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from datetime import datetime, timedelta |
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# package to use for checksum calculations (in this file) |
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import hashlib |
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# package to handle json files |
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import json |
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# package to handle files/folders and related metadata/operations |
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import os |
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# package regular expressions |
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import re |
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class BasicNeeds: |
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cfg_dtls = {} |
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def fn_check_inputs(self, input_parameters): |
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if input_parameters.output_log_file is not None: |
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# checking log folder first as there's all further messages will be stored |
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self.fn_validate_single_value(os.path.dirname(input_parameters.output_log_file), |
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'folder', 'log file') |
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def fn_final_message(self, local_logger, log_file_name, performance_in_seconds): |
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total_time_string = str(timedelta(seconds=performance_in_seconds)) |
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if log_file_name == 'None': |
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self.fn_timestamped_print('Application finished, whole script took ' |
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+ total_time_string) |
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else: |
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local_logger.info(f'Total execution time was ' + total_time_string) |
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self.fn_timestamped_print('Application finished, ' |
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+ 'for complete logged details please check ' |
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+ log_file_name) |
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def fn_get_file_content(self, in_file_handler, in_content_type): |
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if in_content_type == 'json': |
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try: |
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json_interpreted_details = json.load(in_file_handler) |
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self.fn_timestamped_print('I have interpreted JSON structure from given file') |
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return json_interpreted_details |
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except Exception as e: |
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self.fn_timestamped_print('Error encountered when trying to interpret JSON') |
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print(e) |
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elif in_content_type == 'raw': |
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raw_interpreted_file = in_file_handler.read() |
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self.fn_timestamped_print('I have read file entire content') |
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return raw_interpreted_file |
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else: |
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self.fn_timestamped_print('Unknown content type provided, ' |
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+ 'expected either "json" or "raw" but got ' |
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+ in_content_type) |
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@staticmethod |
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def fn_get_file_statistics(file_to_evaluate): |
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try: |
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file_content = open(file=file_to_evaluate, mode='r', encoding='utf-8').read().encode() |
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except UnicodeDecodeError: |
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file_content = open(file=file_to_evaluate, mode='r', encoding='mbcs').read().encode() |
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file_sha512 = hashlib.sha512(file_content).hexdigest() |
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file_content = None |
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f_dts = { |
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'created': datetime.fromtimestamp(os.path.getctime(file_to_evaluate)), |
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'modified': datetime.fromtimestamp(os.path.getctime(file_to_evaluate)), |
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} |
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return { |
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'date when created': datetime.strftime(f_dts['created'], '%Y-%m-%d %H:%M:%S.%f'), |
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'date when last modified': datetime.strftime(f_dts['modified'], '%Y-%m-%d %H:%M:%S.%f'), |
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'size [bytes]': os.path.getsize(file_to_evaluate), |
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'SHA512-Checksum': file_sha512, |
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} |
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def fn_load_configuration(self): |
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relevant_file = os.path.join(os.path.dirname(__file__), 'config.json') |
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self.cfg_dtls = self.fn_open_file_and_get_content(relevant_file) |
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@staticmethod |
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def fn_multi_line_string_to_single_line(input_string): |
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string_to_return = input_string.replace('\n', ' ').replace('\r', ' ') |
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return re.sub(r'\s{2,100}', ' ', string_to_return).replace(' , ', ', ').strip() |
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@staticmethod |
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def fn_numbers_with_leading_zero(input_number_as_string, digits): |
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final_number = input_number_as_string |
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if len(input_number_as_string) < digits: |
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final_number = '0' * (digits - len(input_number_as_string)) + input_number_as_string |
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return final_number |
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def fn_open_file_and_get_content(self, input_file, content_type='json'): |
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if os.path.isfile(input_file): |
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with open(input_file, 'r') as file_handler: |
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self.fn_timestamped_print('I have opened file: ' + input_file) |
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return self.fn_get_file_content(file_handler, content_type) |
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else: |
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self.fn_timestamped_print('Given file ' + input_file |
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+ ' does not exist, please check your inputs!') |
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def fn_optional_print(self, boolean_variable, string_to_print): |
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if boolean_variable: |
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self.fn_timestamped_print(string_to_print) |
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def fn_store_file_statistics(self, local_logger, timmer, file_name, file_meaning): |
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timmer.start() |
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file_name_variable_type = str(type(file_name)) |
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list_file_names = [file_name] |
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if file_name_variable_type == "<class 'list'>": |
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list_file_names = file_name |
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for current_file_name in list_file_names: |
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local_logger.info(file_meaning + ' file "' + current_file_name |
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+ '" has the following characteristics: ' |
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+ str(self.fn_get_file_statistics(current_file_name))) |
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timmer.stop() |
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@staticmethod |
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def fn_timestamped_print(string_to_print): |
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print(datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S.%f %Z") + ' - ' + string_to_print) |
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@staticmethod |
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def fn_validate_one_value(value_to_validate, validation_type, name_meaning): |
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is_fatal_error = False |
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message = '' |
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if validation_type == 'file': |
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is_fatal_error = (not os.path.isfile(value_to_validate)) |
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message = 'Given ' + name_meaning + ' "' + value_to_validate \ |
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+ '" does not exist, please check your inputs!' |
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elif validation_type == 'folder': |
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is_fatal_error = (not os.path.isdir(value_to_validate)) |
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message = 'Given ' + name_meaning + ' "' + value_to_validate \ |
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+ '" does not exist, please check your inputs!' |
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elif validation_type == 'url': |
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url_reg_expression = 'https?://(?:www)?(?:[\\w-]{2,255}(?:\\.\\w{2,66}){1,2})' |
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is_fatal_error = (not re.match(url_reg_expression, value_to_validate)) |
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message = 'Given ' + name_meaning + ' "' + value_to_validate \ |
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+ '" does not seem a valid one, please check your inputs!' |
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return { |
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'is_fatal_error': is_fatal_error, |
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'message': message, |
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} |
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def fn_validate_single_value(self, value_to_validate, validation_type, name_meaning): |
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validation_details = self.fn_validate_one_value(value_to_validate, validation_type, |
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name_meaning) |
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if validation_details['is_fatal_error']: |
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self.fn_timestamped_print(validation_details['message']) |
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exit(1) |
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danielgp /
tableau-hyper-management
