163 lines
8.4 KiB
Python
163 lines
8.4 KiB
Python
import falcon
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import simplejson as json
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import mysql.connector
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import config
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from datetime import datetime, timedelta, timezone
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class Reporting:
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@staticmethod
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def __init__():
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pass
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@staticmethod
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def on_options(req, resp):
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resp.status = falcon.HTTP_200
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####################################################################################################################
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# PROCEDURES
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# Step 1: valid parameters
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# Step 2: query the distribution system
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# Step 3: query associated circuits
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# Step 4: query circuits' associated points
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# Step 5: query points' latest values
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# Step 6: construct the report
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####################################################################################################################
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@staticmethod
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def on_get(req, resp):
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print(req.params)
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distribution_system_id = req.params.get('distributionsystemid')
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################################################################################################################
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# Step 1: valid parameters
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################################################################################################################
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if distribution_system_id is None:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_DISTRIBUTION_SYSTEM_ID')
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else:
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distribution_system_id = str.strip(distribution_system_id)
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if not distribution_system_id.isdigit() or int(distribution_system_id) <= 0:
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raise falcon.HTTPError(falcon.HTTP_400, title='API.BAD_REQUEST',
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description='API.INVALID_DISTRIBUTION_SYSTEM_ID')
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# set the earliest datetime of valid actual value
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# if the utc_date_time is less than reporting_start_datetime_utc, then the value is None because of timeout
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reporting_start_datetime_utc = datetime.utcnow() - timedelta(minutes=5)
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################################################################################################################
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# Step 2: Step 2: query the distribution system
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################################################################################################################
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cnx_system = mysql.connector.connect(**config.myems_system_db)
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cursor_system = cnx_system.cursor(dictionary=True)
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cursor_system.execute(" SELECT name "
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" FROM tbl_distribution_systems "
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" WHERE id = %s ", (distribution_system_id,))
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if cursor_system.fetchone() is None:
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if cursor_system:
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cursor_system.close()
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if cnx_system:
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cnx_system.disconnect()
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raise falcon.HTTPError(falcon.HTTP_404, title='API.NOT_FOUND',
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description='API.DISTRIBUTION_SYSTEM_NOT_FOUND')
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################################################################################################################
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# Step 3: query associated circuits
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################################################################################################################
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query = (" SELECT id, name, uuid, "
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" distribution_room, switchgear, peak_load, peak_current, customers, meters "
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" FROM tbl_distribution_circuits "
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" WHERE distribution_system_id = %s "
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" ORDER BY name ")
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cursor_system.execute(query, (distribution_system_id,))
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rows = cursor_system.fetchall()
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circuit_list = list()
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if rows is not None and len(rows) > 0:
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for row in rows:
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circuit_list.append({"id": row['id'], "name": row['name'], "uuid": row['uuid'],
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"distribution_room": row['distribution_room'], "switchgear": row['switchgear'],
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"peak_load": row['peak_load'], "peak_current": row['peak_current'],
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"customers": row['customers'], "meters": row['meters'],
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"points": list()})
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################################################################################################################
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# Step 4: query circuits' associated points
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################################################################################################################
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for x in range(len(circuit_list)):
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query = (" SELECT p.id, p.name, p.object_type, p.units "
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" FROM tbl_points p, tbl_distribution_circuits_points dcp, tbl_distribution_circuits dc "
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" WHERE dcp.distribution_circuit_id = %s AND p.id = dcp.point_id "
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" AND dcp.distribution_circuit_id = dc.id "
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" ORDER BY p.name ")
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cursor_system.execute(query, (circuit_list[x]['id'],))
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rows = cursor_system.fetchall()
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if rows is not None and len(rows) > 0:
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for row in rows:
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circuit_list[x]['points'].append({"id": row['id'],
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"name": row['name'],
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"object_type": row['object_type'],
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"units": row['units'],
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"value": None})
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if cursor_system:
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cursor_system.close()
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if cnx_system:
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cnx_system.disconnect()
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################################################################################################################
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# Step 5: query points' data
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################################################################################################################
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cnx_historical = mysql.connector.connect(**config.myems_historical_db)
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cursor_historical = cnx_historical.cursor()
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for x in range(len(circuit_list)):
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for y in range(len(circuit_list[x]['points'])):
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if circuit_list[x]['points'][y]['object_type'] == 'ANALOG_VALUE':
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query = (" SELECT actual_value "
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" FROM tbl_analog_value_latest "
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" WHERE point_id = %s "
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" AND utc_date_time > %s ")
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cursor_historical.execute(query, (circuit_list[x]['points'][y]['id'],
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reporting_start_datetime_utc))
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row = cursor_historical.fetchone()
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if row is not None:
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circuit_list[x]['points'][y]['value'] = row[0]
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elif circuit_list[x]['points'][y]['object_type'] == 'ENERGY_VALUE':
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query = (" SELECT actual_value "
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" FROM tbl_energy_value_latest "
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" WHERE point_id = %s "
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" AND utc_date_time > %s ")
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cursor_historical.execute(query, (circuit_list[x]['points'][y]['id'],
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reporting_start_datetime_utc))
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row = cursor_historical.fetchone()
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if row is not None:
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circuit_list[x]['points'][y]['value'] = row[0]
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elif circuit_list[x]['points'][y]['object_type'] == 'DIGITAL_VALUE':
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query = (" SELECT actual_value "
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" FROM tbl_digital_value_latest "
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" WHERE point_id = %s "
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" AND utc_date_time > %s ")
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cursor_historical.execute(query, (circuit_list[x]['points'][y]['id'],
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reporting_start_datetime_utc))
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row = cursor_historical.fetchone()
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if row is not None:
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circuit_list[x]['points'][y]['value'] = row[0]
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if cursor_historical:
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cursor_historical.close()
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if cnx_historical:
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cnx_historical.disconnect()
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################################################################################################################
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# Step 6: construct the report
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################################################################################################################
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result = circuit_list
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resp.body = json.dumps(result)
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