|
1
|
|
|
""" |
|
2
|
|
|
Class Parameter Handling |
|
3
|
|
|
|
|
4
|
|
|
Facilitates handling parameters values |
|
5
|
|
|
""" |
|
6
|
|
|
# package to handle date and times |
|
7
|
|
|
from datetime import date, datetime, timedelta |
|
8
|
|
|
# package regular expressions |
|
9
|
|
|
import re |
|
10
|
|
|
# package to allow year and/or month operations based on a reference date |
|
11
|
|
|
import datedelta |
|
12
|
|
|
|
|
13
|
|
|
|
|
14
|
|
|
class ParameterHandling: |
|
15
|
|
|
known_expressions = { |
|
16
|
|
|
'year': ['CY', 'CurrentYear'], |
|
17
|
|
|
'month': ['CYCM', 'CurrentYearCurrentMonth'], |
|
18
|
|
|
'just_month': ['CM', 'CurrentMonth'], |
|
19
|
|
|
'week': ['CYCW', 'CurrentYearCurrentWeek'], |
|
20
|
|
|
'just_week': ['CW', 'CurrentWeek'], |
|
21
|
|
|
'day': ['CYCMCD', 'CurrentYearCurrentMonthCurrentDay'], |
|
22
|
|
|
'just_day': ['CD', 'CurrentDay'] |
|
23
|
|
|
} |
|
24
|
|
|
|
|
25
|
|
|
def build_parameters(self, local_logger, query_session_parameters, in_parameter_rules): |
|
26
|
|
|
local_logger.debug('Seen Parameters are: ' + str(query_session_parameters)) |
|
27
|
|
|
parameters_type = type(query_session_parameters) |
|
28
|
|
|
local_logger.debug('Parameters type is ' + str(parameters_type)) |
|
29
|
|
|
tp = None |
|
30
|
|
|
if str(parameters_type) == "<class 'dict'>": |
|
31
|
|
|
tp = tuple(query_session_parameters.values()) |
|
32
|
|
|
elif str(parameters_type) == "<class 'list'>": |
|
33
|
|
|
tp = tuple(query_session_parameters) |
|
34
|
|
|
else: |
|
35
|
|
|
local_logger.error('Unknown parameter type (expected either Dictionary or List)') |
|
36
|
|
|
exit(1) |
|
37
|
|
|
local_logger.debug('Initial Tuple for Parameters is: ' + str(tp)) |
|
38
|
|
|
return self.stringify_parameters(local_logger, tp, in_parameter_rules) |
|
39
|
|
|
|
|
40
|
|
|
@staticmethod |
|
41
|
|
|
def calculate_date_deviation(in_date, deviation_type, expression_parts): |
|
42
|
|
|
final_date = in_date |
|
43
|
|
|
if deviation_type == 'year': |
|
44
|
|
|
final_date = in_date + datedelta.datedelta(years=int(expression_parts[2])) |
|
45
|
|
|
elif deviation_type == 'month': |
|
46
|
|
|
final_date = in_date + datedelta.datedelta(months=int(expression_parts[2])) |
|
47
|
|
|
elif deviation_type == 'week': |
|
48
|
|
|
final_date = in_date + timedelta(weeks=int(expression_parts[2])) |
|
49
|
|
|
elif deviation_type == 'day': |
|
50
|
|
|
final_date = in_date + timedelta(days=int(expression_parts[2])) |
|
51
|
|
|
return final_date |
|
52
|
|
|
|
|
53
|
|
|
def calculate_date_from_expression(self, local_logger, expression_parts): |
|
54
|
|
|
final_string = '' |
|
55
|
|
|
all_known_expressions = self.get_flattened_known_expressions() |
|
56
|
|
|
if expression_parts[1] in all_known_expressions: |
|
57
|
|
|
local_logger.debug('I have just been provided with a known expression "' |
|
58
|
|
|
+ '_'.join(expression_parts) + '" to interpret') |
|
59
|
|
|
final_string = self.interpret_known_expression(date.today(), expression_parts) |
|
60
|
|
|
local_logger.debug('Provided known expression "' + '_'.join(expression_parts) |
|
61
|
|
|
+ '" has been determined to be "' + final_string + '"') |
|
62
|
|
|
else: |
|
63
|
|
|
local_logger.error('Unknown expression encountered ' |
|
64
|
|
|
+ str(expression_parts[1]) + '...') |
|
65
|
|
|
exit(1) |
|
66
|
|
|
return final_string |
|
67
|
|
|
|
|
68
|
|
|
def eval_expression(self, local_logger, crt_parameter): |
|
69
|
|
|
value_to_return = crt_parameter |
|
70
|
|
|
reg_ex = re.search(r'(CalculatedDate\_[A-Za-z]{2,62}\_*(-*)[0-9]{0,2})', crt_parameter) |
|
71
|
|
|
if reg_ex: |
|
72
|
|
|
parameter_value_parts = reg_ex.group().split('_') |
|
73
|
|
|
calculated = self.calculate_date_from_expression(local_logger, parameter_value_parts) |
|
74
|
|
|
value_to_return = re.sub(reg_ex.group(), calculated, crt_parameter) |
|
75
|
|
|
local_logger.debug('Current Parameter is STR and has been re-interpreted as value: ' |
|
76
|
|
|
+ str(value_to_return)) |
|
77
|
|
|
return value_to_return |
|
78
|
|
|
|
|
79
|
|
|
def get_child_parent_expressions(self): |
|
80
|
|
|
child_parent_values = {} |
|
81
|
|
|
for current_expression_group in self.known_expressions.items(): |
|
82
|
|
|
for current_expression in current_expression_group[1]: |
|
83
|
|
|
child_parent_values[current_expression] = current_expression_group[0] |
|
84
|
|
|
return child_parent_values |
|
85
|
|
|
|
|
86
|
|
|
def get_flattened_known_expressions(self): |
|
87
|
|
|
flat_values = [] |
|
88
|
|
|
index_counter = 0 |
|
89
|
|
|
for current_expression_group in self.known_expressions.items(): |
|
90
|
|
|
for current_expression in current_expression_group[1]: |
|
91
|
|
|
flat_values.append(index_counter) |
|
92
|
|
|
flat_values[index_counter] = current_expression |
|
93
|
|
|
index_counter += 1 |
|
94
|
|
|
return flat_values |
|
95
|
|
|
|
|
96
|
|
|
@staticmethod |
|
97
|
|
|
def get_week_number_as_two_digits_string(in_date): |
|
98
|
|
|
week_iso_num = datetime.isocalendar(in_date)[1] |
|
99
|
|
|
value_to_return = str(week_iso_num) |
|
100
|
|
|
if week_iso_num < 10: |
|
101
|
|
|
value_to_return = '0' + value_to_return |
|
102
|
|
|
return value_to_return |
|
103
|
|
|
|
|
104
|
|
|
def handle_query_parameters(self, local_logger, given_session): |
|
105
|
|
|
tp = None |
|
106
|
|
|
if 'parameters' in given_session: |
|
107
|
|
|
parameter_rules = [] |
|
108
|
|
|
if 'parameters-handling-rules' in given_session: |
|
109
|
|
|
parameter_rules = given_session['parameters-handling-rules'] |
|
110
|
|
|
tp = self.build_parameters(local_logger, given_session['parameters'], parameter_rules) |
|
111
|
|
|
return tp |
|
112
|
|
|
|
|
113
|
|
|
def interpret_known_expression(self, ref_date, expression_parts): |
|
114
|
|
|
child_parent_expressions = self.get_child_parent_expressions() |
|
115
|
|
|
deviation_original = child_parent_expressions.get(expression_parts[1]) |
|
116
|
|
|
deviation = deviation_original.replace('just_', '') |
|
117
|
|
|
finalized_date = ref_date |
|
118
|
|
|
if len(expression_parts) >= 3: |
|
119
|
|
|
finalized_date = self.calculate_date_deviation(ref_date, deviation, expression_parts) |
|
120
|
|
|
week_number_string = self.get_week_number_as_two_digits_string(finalized_date) |
|
121
|
|
|
if deviation_original == 'week': |
|
122
|
|
|
final_string = str(datetime.isocalendar(finalized_date)[0]) + week_number_string |
|
123
|
|
|
elif deviation_original == 'just_week': |
|
124
|
|
|
final_string = week_number_string |
|
125
|
|
|
else: |
|
126
|
|
|
standard_formats = { |
|
127
|
|
|
'year': '%Y', |
|
128
|
|
|
'month': '%Y%m', |
|
129
|
|
|
'just_month': '%m', |
|
130
|
|
|
'day': '%Y%m%d', |
|
131
|
|
|
'just_day': '%d', |
|
132
|
|
|
} |
|
133
|
|
|
target_format = standard_formats.get(deviation_original) |
|
134
|
|
|
final_string = datetime.strftime(finalized_date, target_format) |
|
135
|
|
|
return final_string |
|
136
|
|
|
|
|
137
|
|
|
@staticmethod |
|
138
|
|
|
def manage_parameter_value(given_prefix, given_parameter, given_parameter_rules): |
|
139
|
|
|
element_to_join = '' |
|
140
|
|
|
if given_prefix == 'dict': |
|
141
|
|
|
element_to_join = given_parameter.values() |
|
142
|
|
|
elif given_prefix == 'list': |
|
143
|
|
|
element_to_join = given_parameter |
|
144
|
|
|
return given_parameter_rules[given_prefix + '-values-prefix'] \ |
|
145
|
|
|
+ given_parameter_rules[given_prefix + '-values-glue'].join(element_to_join) \ |
|
146
|
|
|
+ given_parameter_rules[given_prefix + '-values-suffix'] |
|
147
|
|
|
|
|
148
|
|
|
def simulate_final_query(self, local_logger, timered, in_query, in_parameters_number, in_tp): |
|
149
|
|
|
timered.start() |
|
150
|
|
|
return_query = in_query |
|
151
|
|
|
if in_parameters_number > 0: |
|
152
|
|
|
try: |
|
153
|
|
|
return_query = in_query % in_tp |
|
154
|
|
|
except TypeError as e: |
|
155
|
|
|
local_logger.debug('Initial query expects ' + str(in_parameters_number) |
|
156
|
|
|
+ ' parameters but only ' + str(len(in_tp)) |
|
157
|
|
|
+ ' parameters were provided!') |
|
158
|
|
|
local_logger.error(e) |
|
159
|
|
|
timered.stop() |
|
160
|
|
|
return return_query |
|
161
|
|
|
|
|
162
|
|
|
def stringify_parameters(self, local_logger, tuple_parameters, given_parameter_rules): |
|
163
|
|
|
working_list = [] |
|
164
|
|
|
for ndx, crt_parameter in enumerate(tuple_parameters): |
|
165
|
|
|
current_parameter_type = str(type(crt_parameter)) |
|
166
|
|
|
working_list.append(ndx) |
|
167
|
|
|
if current_parameter_type == "<class 'str'>": |
|
168
|
|
|
local_logger.debug('Current Parameter is STR and has the value: ' + crt_parameter) |
|
169
|
|
|
working_list[ndx] = self.eval_expression(local_logger, crt_parameter) |
|
170
|
|
|
elif current_parameter_type in ("<class 'list'>", "<class 'dict'>"): |
|
171
|
|
|
prefix = current_parameter_type.replace("<class '", '').replace("'>", '') |
|
172
|
|
|
local_logger.debug('Current Parameter is ' + prefix.upper() |
|
173
|
|
|
+ ' and has the value: ' + str(crt_parameter)) |
|
174
|
|
|
working_list[ndx] = self.manage_parameter_value(prefix.lower(), crt_parameter, |
|
175
|
|
|
given_parameter_rules) |
|
176
|
|
|
final_tuple = tuple(working_list) |
|
177
|
|
|
local_logger.debug('Final Tuple for Parameters is: ' + str(final_tuple)) |
|
178
|
|
|
return final_tuple |
|
179
|
|
|
|
danielgp /
db-extractor
