myems /
myems-api
| Conditions | 52 |
| Total Lines | 356 |
| Code Lines | 256 |
| Lines | 356 |
| Ratio | 100 % |
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
Complex classes like reports.offlinemetercost.Reporting.on_get() often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | import falcon |
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| 31 | @staticmethod |
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| 32 | def on_get(req, resp): |
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| 33 | print(req.params) |
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| 34 | offline_meter_id = req.params.get('offlinemeterid') |
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| 35 | period_type = req.params.get('periodtype') |
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| 36 | base_period_start_datetime = req.params.get('baseperiodstartdatetime') |
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| 37 | base_period_end_datetime = req.params.get('baseperiodenddatetime') |
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| 38 | reporting_period_start_datetime_local = req.params.get('reportingperiodstartdatetime') |
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| 39 | reporting_period_end_datetime_local = req.params.get('reportingperiodenddatetime') |
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| 40 | |||
| 41 | ################################################################################################################ |
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| 42 | # Step 1: valid parameters |
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| 43 | ################################################################################################################ |
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| 44 | if offline_meter_id is None: |
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| 45 | raise falcon.HTTPError(falcon.HTTP_400, |
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| 46 | title='API.BAD_REQUEST', |
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| 47 | description='API.INVALID_OFFLINE_METER_ID') |
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| 48 | else: |
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| 49 | offline_meter_id = str.strip(offline_meter_id) |
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| 50 | if not offline_meter_id.isdigit() or int(offline_meter_id) <= 0: |
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| 51 | raise falcon.HTTPError(falcon.HTTP_400, |
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| 52 | title='API.BAD_REQUEST', |
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| 53 | description='API.INVALID_OFFLINE_METER_ID') |
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| 54 | |||
| 55 | if period_type is None: |
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| 56 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', description='API.INVALID_PERIOD_TYPE') |
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| 57 | else: |
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| 58 | period_type = str.strip(period_type) |
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| 59 | if period_type not in ['hourly', 'daily', 'monthly', 'yearly']: |
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| 60 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', description='API.INVALID_PERIOD_TYPE') |
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| 61 | |||
| 62 | timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6]) |
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| 63 | if config.utc_offset[0] == '-': |
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| 64 | timezone_offset = -timezone_offset |
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| 65 | |||
| 66 | base_start_datetime_utc = None |
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| 67 | if base_period_end_datetime is not None and len(str.strip(base_period_end_datetime)) > 0: |
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| 68 | base_period_start_datetime = str.strip(base_period_start_datetime) |
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| 69 | try: |
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| 70 | base_start_datetime_utc = datetime.strptime(base_period_start_datetime, '%Y-%m-%dT%H:%M:%S') |
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| 71 | except ValueError: |
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| 72 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 73 | description="API.INVALID_BASE_PERIOD_START_DATETIME") |
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| 74 | base_start_datetime_utc = base_start_datetime_utc.replace(tzinfo=timezone.utc) - \ |
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| 75 | timedelta(minutes=timezone_offset) |
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| 76 | |||
| 77 | base_end_datetime_utc = None |
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| 78 | if base_period_end_datetime is not None and len(str.strip(base_period_end_datetime)) > 0: |
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| 79 | base_period_end_datetime = str.strip(base_period_end_datetime) |
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| 80 | try: |
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| 81 | base_end_datetime_utc = datetime.strptime(base_period_end_datetime, '%Y-%m-%dT%H:%M:%S') |
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| 82 | except ValueError: |
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| 83 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 84 | description="API.INVALID_BASE_PERIOD_END_DATETIME") |
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| 85 | base_end_datetime_utc = base_end_datetime_utc.replace(tzinfo=timezone.utc) - \ |
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| 86 | timedelta(minutes=timezone_offset) |
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| 87 | |||
| 88 | if base_start_datetime_utc is not None and base_end_datetime_utc is not None and \ |
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| 89 | base_start_datetime_utc >= base_end_datetime_utc: |
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| 90 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 91 | description='API.INVALID_BASE_PERIOD_END_DATETIME') |
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| 92 | |||
| 93 | if reporting_period_start_datetime_local is None: |
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| 94 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 95 | description="API.INVALID_REPORTING_PERIOD_START_DATETIME") |
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| 96 | else: |
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| 97 | reporting_period_start_datetime_local = str.strip(reporting_period_start_datetime_local) |
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| 98 | try: |
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| 99 | reporting_start_datetime_utc = datetime.strptime(reporting_period_start_datetime_local, |
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| 100 | '%Y-%m-%dT%H:%M:%S') |
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| 101 | except ValueError: |
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| 102 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 103 | description="API.INVALID_REPORTING_PERIOD_START_DATETIME") |
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| 104 | reporting_start_datetime_utc = reporting_start_datetime_utc.replace(tzinfo=timezone.utc) - \ |
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| 105 | timedelta(minutes=timezone_offset) |
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| 106 | |||
| 107 | if reporting_period_end_datetime_local is None: |
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| 108 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 109 | description="API.INVALID_REPORTING_PERIOD_END_DATETIME") |
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| 110 | else: |
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| 111 | reporting_period_end_datetime_local = str.strip(reporting_period_end_datetime_local) |
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| 112 | try: |
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| 113 | reporting_end_datetime_utc = datetime.strptime(reporting_period_end_datetime_local, |
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| 114 | '%Y-%m-%dT%H:%M:%S') |
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| 115 | except ValueError: |
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| 116 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 117 | description="API.INVALID_REPORTING_PERIOD_END_DATETIME") |
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| 118 | reporting_end_datetime_utc = reporting_end_datetime_utc.replace(tzinfo=timezone.utc) - \ |
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| 119 | timedelta(minutes=timezone_offset) |
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| 120 | |||
| 121 | if reporting_start_datetime_utc >= reporting_end_datetime_utc: |
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| 122 | raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST', |
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| 123 | description='API.INVALID_REPORTING_PERIOD_END_DATETIME') |
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| 124 | |||
| 125 | ################################################################################################################ |
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| 126 | # Step 2: query the offline meter and energy category |
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| 127 | ################################################################################################################ |
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| 128 | cnx_system = mysql.connector.connect(**config.myems_system_db) |
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| 129 | cursor_system = cnx_system.cursor() |
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| 130 | |||
| 131 | cnx_energy = mysql.connector.connect(**config.myems_energy_db) |
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| 132 | cursor_energy = cnx_energy.cursor() |
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| 133 | |||
| 134 | cnx_billing = mysql.connector.connect(**config.myems_billing_db) |
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| 135 | cursor_billing = cnx_billing.cursor() |
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| 136 | |||
| 137 | cursor_system.execute(" SELECT m.id, m.name, m.cost_center_id, m.energy_category_id, " |
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| 138 | " ec.name, ec.unit_of_measure, ec.kgce, ec.kgco2e " |
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| 139 | " FROM tbl_offline_meters m, tbl_energy_categories ec " |
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| 140 | " WHERE m.id = %s AND m.energy_category_id = ec.id ", (offline_meter_id,)) |
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| 141 | row_offline_meter = cursor_system.fetchone() |
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| 142 | if row_offline_meter is None: |
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| 143 | if cursor_system: |
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| 144 | cursor_system.close() |
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| 145 | if cnx_system: |
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| 146 | cnx_system.disconnect() |
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| 147 | |||
| 148 | if cursor_energy: |
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| 149 | cursor_energy.close() |
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| 150 | if cnx_energy: |
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| 151 | cnx_energy.disconnect() |
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| 152 | |||
| 153 | if cursor_billing: |
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| 154 | cursor_billing.close() |
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| 155 | if cnx_billing: |
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| 156 | cnx_billing.disconnect() |
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| 157 | |||
| 158 | raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND', description='API.OFFLINE_METER_NOT_FOUND') |
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| 159 | |||
| 160 | offline_meter = dict() |
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| 161 | offline_meter['id'] = row_offline_meter[0] |
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| 162 | offline_meter['name'] = row_offline_meter[1] |
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| 163 | offline_meter['cost_center_id'] = row_offline_meter[2] |
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| 164 | offline_meter['energy_category_id'] = row_offline_meter[3] |
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| 165 | offline_meter['energy_category_name'] = row_offline_meter[4] |
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| 166 | offline_meter['unit_of_measure'] = config.currency_unit |
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| 167 | offline_meter['kgce'] = row_offline_meter[6] |
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| 168 | offline_meter['kgco2e'] = row_offline_meter[7] |
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| 169 | |||
| 170 | ################################################################################################################ |
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| 171 | # Step 3: query base period energy consumption |
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| 172 | ################################################################################################################ |
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| 173 | query = (" SELECT start_datetime_utc, actual_value " |
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| 174 | " FROM tbl_offline_meter_hourly " |
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| 175 | " WHERE offline_meter_id = %s " |
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| 176 | " AND start_datetime_utc >= %s " |
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| 177 | " AND start_datetime_utc < %s " |
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| 178 | " ORDER BY start_datetime_utc ") |
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| 179 | cursor_energy.execute(query, (offline_meter['id'], base_start_datetime_utc, base_end_datetime_utc)) |
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| 180 | rows_offline_meter_hourly = cursor_energy.fetchall() |
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| 181 | |||
| 182 | rows_offline_meter_periodically = utilities.aggregate_hourly_data_by_period(rows_offline_meter_hourly, |
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| 183 | base_start_datetime_utc, |
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| 184 | base_end_datetime_utc, |
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| 185 | period_type) |
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| 186 | base = dict() |
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| 187 | base['timestamps'] = list() |
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| 188 | base['values'] = list() |
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| 189 | base['total_in_category'] = Decimal(0.0) |
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| 190 | base['total_in_kgce'] = Decimal(0.0) |
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| 191 | base['total_in_kgco2e'] = Decimal(0.0) |
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| 192 | |||
| 193 | for row_offline_meter_periodically in rows_offline_meter_periodically: |
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| 194 | current_datetime_local = row_offline_meter_periodically[0].replace(tzinfo=timezone.utc) + \ |
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| 195 | timedelta(minutes=timezone_offset) |
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| 196 | if period_type == 'hourly': |
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| 197 | current_datetime = current_datetime_local.strftime('%Y-%m-%dT%H:%M:%S') |
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| 198 | elif period_type == 'daily': |
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| 199 | current_datetime = current_datetime_local.strftime('%Y-%m-%d') |
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| 200 | elif period_type == 'monthly': |
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| 201 | current_datetime = current_datetime_local.strftime('%Y-%m') |
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| 202 | elif period_type == 'yearly': |
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| 203 | current_datetime = current_datetime_local.strftime('%Y') |
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| 204 | |||
| 205 | actual_value = Decimal(0.0) if row_offline_meter_periodically[1] is None \ |
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| 206 | else row_offline_meter_periodically[1] |
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| 207 | base['timestamps'].append(current_datetime) |
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| 208 | base['total_in_kgce'] += actual_value * offline_meter['kgce'] |
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| 209 | base['total_in_kgco2e'] += actual_value * offline_meter['kgco2e'] |
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| 210 | |||
| 211 | ################################################################################################################ |
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| 212 | # Step 4: query base period energy cost |
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| 213 | ################################################################################################################ |
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| 214 | query = (" SELECT start_datetime_utc, actual_value " |
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| 215 | " FROM tbl_offline_meter_hourly " |
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| 216 | " WHERE offline_meter_id = %s " |
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| 217 | " AND start_datetime_utc >= %s " |
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| 218 | " AND start_datetime_utc < %s " |
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| 219 | " ORDER BY start_datetime_utc ") |
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| 220 | cursor_billing.execute(query, (offline_meter['id'], base_start_datetime_utc, base_end_datetime_utc)) |
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| 221 | rows_offline_meter_hourly = cursor_billing.fetchall() |
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| 222 | |||
| 223 | rows_offline_meter_periodically = utilities.aggregate_hourly_data_by_period(rows_offline_meter_hourly, |
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| 224 | base_start_datetime_utc, |
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| 225 | base_end_datetime_utc, |
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| 226 | period_type) |
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| 227 | |||
| 228 | base['values'] = list() |
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| 229 | base['total_in_category'] = Decimal(0.0) |
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| 230 | |||
| 231 | for row_offline_meter_periodically in rows_offline_meter_periodically: |
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| 232 | actual_value = Decimal(0.0) if row_offline_meter_periodically[1] is None \ |
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| 233 | else row_offline_meter_periodically[1] |
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| 234 | base['values'].append(actual_value) |
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| 235 | base['total_in_category'] += actual_value |
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| 236 | |||
| 237 | ################################################################################################################ |
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| 238 | # Step 5: query reporting period energy consumption |
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| 239 | ################################################################################################################ |
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| 240 | query = (" SELECT start_datetime_utc, actual_value " |
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| 241 | " FROM tbl_offline_meter_hourly " |
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| 242 | " WHERE offline_meter_id = %s " |
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| 243 | " AND start_datetime_utc >= %s " |
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| 244 | " AND start_datetime_utc < %s " |
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| 245 | " ORDER BY start_datetime_utc ") |
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| 246 | cursor_energy.execute(query, (offline_meter['id'], reporting_start_datetime_utc, reporting_end_datetime_utc)) |
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| 247 | rows_offline_meter_hourly = cursor_energy.fetchall() |
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| 248 | |||
| 249 | rows_offline_meter_periodically = utilities.aggregate_hourly_data_by_period(rows_offline_meter_hourly, |
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| 250 | reporting_start_datetime_utc, |
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| 251 | reporting_end_datetime_utc, |
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| 252 | period_type) |
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| 253 | reporting = dict() |
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| 254 | reporting['timestamps'] = list() |
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| 255 | reporting['values'] = list() |
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| 256 | reporting['total_in_category'] = Decimal(0.0) |
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| 257 | reporting['total_in_kgce'] = Decimal(0.0) |
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| 258 | reporting['total_in_kgco2e'] = Decimal(0.0) |
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| 259 | |||
| 260 | for row_offline_meter_periodically in rows_offline_meter_periodically: |
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| 261 | current_datetime_local = row_offline_meter_periodically[0].replace(tzinfo=timezone.utc) + \ |
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| 262 | timedelta(minutes=timezone_offset) |
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| 263 | if period_type == 'hourly': |
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| 264 | current_datetime = current_datetime_local.strftime('%Y-%m-%dT%H:%M:%S') |
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| 265 | elif period_type == 'daily': |
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| 266 | current_datetime = current_datetime_local.strftime('%Y-%m-%d') |
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| 267 | elif period_type == 'monthly': |
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| 268 | current_datetime = current_datetime_local.strftime('%Y-%m') |
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| 269 | elif period_type == 'yearly': |
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| 270 | current_datetime = current_datetime_local.strftime('%Y') |
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| 271 | |||
| 272 | actual_value = Decimal(0.0) if row_offline_meter_periodically[1] is None \ |
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| 273 | else row_offline_meter_periodically[1] |
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| 274 | |||
| 275 | reporting['timestamps'].append(current_datetime) |
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| 276 | reporting['total_in_kgce'] += actual_value * offline_meter['kgce'] |
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| 277 | reporting['total_in_kgco2e'] += actual_value * offline_meter['kgco2e'] |
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| 278 | |||
| 279 | ################################################################################################################ |
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| 280 | # Step 6: query reporting period energy cost |
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| 281 | ################################################################################################################ |
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| 282 | query = (" SELECT start_datetime_utc, actual_value " |
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| 283 | " FROM tbl_offline_meter_hourly " |
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| 284 | " WHERE offline_meter_id = %s " |
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| 285 | " AND start_datetime_utc >= %s " |
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| 286 | " AND start_datetime_utc < %s " |
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| 287 | " ORDER BY start_datetime_utc ") |
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| 288 | cursor_billing.execute(query, (offline_meter['id'], reporting_start_datetime_utc, reporting_end_datetime_utc)) |
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| 289 | rows_offline_meter_hourly = cursor_billing.fetchall() |
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| 290 | |||
| 291 | rows_offline_meter_periodically = utilities.aggregate_hourly_data_by_period(rows_offline_meter_hourly, |
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| 292 | reporting_start_datetime_utc, |
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| 293 | reporting_end_datetime_utc, |
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| 294 | period_type) |
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| 295 | |||
| 296 | for row_offline_meter_periodically in rows_offline_meter_periodically: |
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| 297 | actual_value = Decimal(0.0) if row_offline_meter_periodically[1] is None \ |
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| 298 | else row_offline_meter_periodically[1] |
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| 299 | |||
| 300 | reporting['values'].append(actual_value) |
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| 301 | reporting['total_in_category'] += actual_value |
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| 302 | |||
| 303 | ################################################################################################################ |
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| 304 | # Step 7: query tariff data |
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| 305 | ################################################################################################################ |
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| 306 | parameters_data = dict() |
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| 307 | parameters_data['names'] = list() |
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| 308 | parameters_data['timestamps'] = list() |
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| 309 | parameters_data['values'] = list() |
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| 310 | |||
| 311 | tariff_dict = utilities.get_energy_category_tariffs(offline_meter['cost_center_id'], |
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| 312 | offline_meter['energy_category_id'], |
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| 313 | reporting_start_datetime_utc, |
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| 314 | reporting_end_datetime_utc) |
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| 315 | tariff_timestamp_list = list() |
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| 316 | tariff_value_list = list() |
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| 317 | for k, v in tariff_dict.items(): |
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| 318 | # convert k from utc to local |
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| 319 | k = k + timedelta(minutes=timezone_offset) |
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| 320 | tariff_timestamp_list.append(k.isoformat()[0:19]) |
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| 321 | tariff_value_list.append(v) |
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| 322 | |||
| 323 | parameters_data['names'].append('TARIFF-' + offline_meter['energy_category_name']) |
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| 324 | parameters_data['timestamps'].append(tariff_timestamp_list) |
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| 325 | parameters_data['values'].append(tariff_value_list) |
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| 326 | |||
| 327 | ################################################################################################################ |
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| 328 | # Step 8: construct the report |
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| 329 | ################################################################################################################ |
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| 330 | if cursor_system: |
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| 331 | cursor_system.close() |
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| 332 | if cnx_system: |
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| 333 | cnx_system.disconnect() |
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| 334 | |||
| 335 | if cursor_energy: |
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| 336 | cursor_energy.close() |
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| 337 | if cnx_energy: |
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| 338 | cnx_energy.disconnect() |
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| 339 | |||
| 340 | if cursor_billing: |
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| 341 | cursor_billing.close() |
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| 342 | if cnx_billing: |
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| 343 | cnx_billing.disconnect() |
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| 344 | |||
| 345 | result = { |
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| 346 | "offline_meter": { |
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| 347 | "cost_center_id": offline_meter['cost_center_id'], |
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| 348 | "energy_category_id": offline_meter['energy_category_id'], |
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| 349 | "energy_category_name": offline_meter['energy_category_name'], |
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| 350 | "unit_of_measure": config.currency_unit, |
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| 351 | "kgce": offline_meter['kgce'], |
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| 352 | "kgco2e": offline_meter['kgco2e'], |
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| 353 | }, |
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| 354 | "base_period": { |
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| 355 | "total_in_category": base['total_in_category'], |
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| 356 | "total_in_kgce": base['total_in_kgce'], |
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| 357 | "total_in_kgco2e": base['total_in_kgco2e'], |
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| 358 | "timestamps": base['timestamps'], |
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| 359 | "values": base['values'], |
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| 360 | }, |
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| 361 | "reporting_period": { |
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| 362 | "increment_rate": |
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| 363 | (reporting['total_in_category'] - base['total_in_category']) / base['total_in_category'] |
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| 364 | if base['total_in_category'] > 0 else None, |
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| 365 | "total_in_category": reporting['total_in_category'], |
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| 366 | "total_in_kgce": reporting['total_in_kgce'], |
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| 367 | "total_in_kgco2e": reporting['total_in_kgco2e'], |
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| 368 | "timestamps": reporting['timestamps'], |
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| 369 | "values": reporting['values'], |
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| 370 | }, |
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| 371 | "parameters": { |
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| 372 | "names": parameters_data['names'], |
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| 373 | "timestamps": parameters_data['timestamps'], |
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| 374 | "values": parameters_data['values'] |
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| 375 | }, |
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| 376 | } |
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| 377 | |||
| 378 | # export result to Excel file and then encode the file to base64 string |
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| 379 | result['excel_bytes_base64'] = \ |
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| 380 | excelexporters.offlinemetercost.export(result, |
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| 381 | offline_meter['name'], |
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| 382 | reporting_period_start_datetime_local, |
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| 383 | reporting_period_end_datetime_local, |
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| 384 | period_type) |
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| 385 | |||
| 386 | resp.body = json.dumps(result) |
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| 387 |
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