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1
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"""
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2
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BasicNeeds - useful functions library
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3
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4
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This library has functions useful to keep main logic short and simple
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5
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"""
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6
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# package to handle date and times
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7
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from datetime import datetime, timedelta
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8
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# package to handle files/folders and related metadata/operations
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9
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import os
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10
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# package regular expressions
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11
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import re
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12
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13
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14
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class BasicNeeds:
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15
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16
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def fn_check_inputs(self, input_parameters):
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17
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if input_parameters.output_log_file is not None:
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18
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# checking log folder first as there's all further messages will be stored
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19
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self.fn_validate_single_value(os.path.dirname(input_parameters.output_log_file),
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20
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'folder', 'log file')
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21
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22
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def fn_final_message(self, local_logger, log_file_name, performance_in_seconds):
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23
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total_time_string = str(timedelta(seconds=performance_in_seconds))
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24
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if log_file_name == 'None':
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25
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self.fn_timestamped_print('Application finished, whole script took '
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26
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+ total_time_string)
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27
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else:
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28
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local_logger.info(f'Total execution time was ' + total_time_string)
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29
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self.fn_timestamped_print('Application finished, '
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30
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+ 'for complete logged details please check '
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31
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+ log_file_name)
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32
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33
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@staticmethod
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34
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def fn_multi_line_string_to_single_line(input_string):
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35
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string_to_return = input_string.replace('\n', ' ').replace('\r', ' ')
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36
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return re.sub(r'\s{2,100}', ' ', string_to_return).replace(' , ', ', ').strip()
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37
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38
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@staticmethod
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39
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def fn_numbers_with_leading_zero(input_number_as_string, digits):
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40
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final_number = input_number_as_string
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41
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if len(input_number_as_string) < digits:
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42
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final_number = '0' * (digits - len(input_number_as_string)) + input_number_as_string
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43
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return final_number
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44
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45
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def fn_optional_print(self, boolean_variable, string_to_print):
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46
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if boolean_variable:
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47
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self.fn_timestamped_print(string_to_print)
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48
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49
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@staticmethod
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50
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def fn_timestamped_print(string_to_print):
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51
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print(datetime.utcnow().strftime("%Y-%m-%d %H:%M:%S.%f %Z") + ' - ' + string_to_print)
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52
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53
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@staticmethod
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54
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def fn_validate_one_value(value_to_validate, validation_type, name_meaning):
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55
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is_fatal_error = False
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56
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message = ''
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57
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if validation_type == 'file':
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58
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is_fatal_error = (not os.path.isfile(value_to_validate))
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59
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message = 'Given ' + name_meaning + ' "' + value_to_validate \
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60
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+ '" does not exist, please check your inputs!'
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61
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elif validation_type == 'folder':
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62
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is_fatal_error = (not os.path.isdir(value_to_validate))
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63
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message = 'Given ' + name_meaning + ' "' + value_to_validate \
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64
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+ '" does not exist, please check your inputs!'
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65
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elif validation_type == 'url':
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66
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url_reg_expression = 'https?://(?:www)?(?:[\\w-]{2,255}(?:\\.\\w{2,66}){1,2})'
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67
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is_fatal_error = (not re.match(url_reg_expression, value_to_validate))
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68
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message = 'Given ' + name_meaning + ' "' + value_to_validate \
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69
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+ '" does not seem a valid one, please check your inputs!'
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70
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return {
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71
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'is_fatal_error': is_fatal_error,
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72
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'message': message,
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73
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}
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74
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75
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def fn_validate_single_value(self, value_to_validate, validation_type, name_meaning):
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76
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validation_details = self.fn_validate_one_value(value_to_validate, validation_type,
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77
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name_meaning)
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78
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if validation_details['is_fatal_error']:
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79
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self.fn_timestamped_print(validation_details['message'])
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80
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exit(1)
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81
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danielgp /
db-extractor
