myems-api/core/datasource.py
import uuid
from datetime import datetime, timezone, timedelta
import falcon
import mysql.connector
import simplejson as json
from core.useractivity import user_logger, admin_control
import config
from decimal import Decimal
class DataSourceCollection:
def __init__(self):
""""Initializes DataSourceCollection"""
pass
@staticmethod
def on_options(req, resp):
resp.status = falcon.HTTP_200
@staticmethod
def on_get(req, resp):
admin_control(req)
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, uuid "
" FROM tbl_gateways ")
cursor.execute(query)
rows_gateways = cursor.fetchall()
gateway_dict = dict()
if rows_gateways is not None and len(rows_gateways) > 0:
for row in rows_gateways:
gateway_dict[row[0]] = {"id": row[0],
"name": row[1],
"uuid": row[2]}
query = (" SELECT id, name, uuid, gateway_id, protocol, connection, last_seen_datetime_utc, description "
" FROM tbl_data_sources "
" ORDER BY id ")
cursor.execute(query)
rows = cursor.fetchall()
cursor.close()
cnx.close()
timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
if config.utc_offset[0] == '-':
timezone_offset = -timezone_offset
result = list()
if rows is not None and len(rows) > 0:
for row in rows:
if isinstance(row[6], datetime):
last_seen_datetime_local = row[6].replace(tzinfo=timezone.utc) + timedelta(minutes=timezone_offset)
last_seen_datetime = last_seen_datetime_local.strftime('%Y-%m-%dT%H:%M:%S')
else:
last_seen_datetime = None
meta_result = {"id": row[0],
"name": row[1],
"uuid": row[2],
"gateway": gateway_dict.get(row[3]),
"protocol": row[4],
"connection": row[5],
"last_seen_datetime": last_seen_datetime,
"description": row[7]
}
result.append(meta_result)
resp.text = json.dumps(result)
@staticmethod
@user_logger
def on_post(req, resp):
"""Handles POST requests"""
admin_control(req)
try:
raw_json = req.stream.read().decode('utf-8')
except Exception as ex:
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.FAILED_TO_READ_REQUEST_STREAM')
new_values = json.loads(raw_json)
if 'name' not in new_values['data'].keys() or \
not isinstance(new_values['data']['name'], str) or \
len(str.strip(new_values['data']['name'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_NAME')
name = str.strip(new_values['data']['name'])
if 'gateway_id' not in new_values['data'].keys() or \
not isinstance(new_values['data']['gateway_id'], int) or \
new_values['data']['gateway_id'] <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_GATEWAY_ID')
gateway_id = new_values['data']['gateway_id']
if 'protocol' not in new_values['data'].keys() or \
not isinstance(new_values['data']['protocol'], str) or \
len(str.strip(new_values['data']['protocol'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_PROTOCOL')
protocol = new_values['data']['protocol']
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, code "
" FROM tbl_protocols ")
cursor.execute(query)
rows_protocols = cursor.fetchall()
procotol_dict = dict()
if rows_protocols is not None and len(rows_protocols) > 0:
for row in rows_protocols:
procotol_dict[row[2]] = {"id": row[0],
"name": row[1],
"code": row[2]}
if protocol not in procotol_dict.keys():
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_PROTOCOL')
if 'connection' not in new_values['data'].keys() or \
not isinstance(new_values['data']['connection'], str) or \
len(str.strip(new_values['data']['connection'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_CONNECTION')
connection = str.strip(new_values['data']['connection'])
if 'description' in new_values['data'].keys() and \
new_values['data']['description'] is not None and \
len(str(new_values['data']['description'])) > 0:
description = str.strip(new_values['data']['description'])
else:
description = None
cursor.execute(" SELECT name "
" FROM tbl_data_sources "
" WHERE name = %s ", (name,))
if cursor.fetchone() is not None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.DATA_SOURCE_NAME_IS_ALREADY_IN_USE')
cursor.execute(" SELECT name "
" FROM tbl_gateways "
" WHERE id = %s ", (gateway_id,))
if cursor.fetchone() is None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_GATEWAY_ID')
add_values = (" INSERT INTO tbl_data_sources (name, uuid, gateway_id, protocol, connection, description) "
" VALUES (%s, %s, %s, %s, %s, %s) ")
cursor.execute(add_values, (name,
str(uuid.uuid4()),
gateway_id,
protocol,
connection,
description))
new_id = cursor.lastrowid
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_201
resp.location = '/datasources/' + str(new_id)
class DataSourceItem:
def __init__(self):
""""Initializes DataSourceItem"""
pass
@staticmethod
def on_options(req, resp, id_):
resp.status = falcon.HTTP_200
@staticmethod
def on_get(req, resp, id_):
admin_control(req)
if not id_.isdigit() or int(id_) <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, uuid "
" FROM tbl_gateways ")
cursor.execute(query)
rows_gateways = cursor.fetchall()
gateway_dict = dict()
if rows_gateways is not None and len(rows_gateways) > 0:
for row in rows_gateways:
gateway_dict[row[0]] = {"id": row[0],
"name": row[1],
"uuid": row[2]}
query = (" SELECT id, name, uuid, gateway_id, protocol, connection, last_seen_datetime_utc, description "
" FROM tbl_data_sources "
" WHERE id = %s ")
cursor.execute(query, (id_,))
row = cursor.fetchone()
cursor.close()
cnx.close()
if row is None:
raise falcon.HTTPError(status=falcon.HTTP_404, title='API.NOT_FOUND',
description='API.DATA_SOURCE_NOT_FOUND')
timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
if config.utc_offset[0] == '-':
timezone_offset = -timezone_offset
if isinstance(row[6], datetime):
last_seen_datetime_local = row[6].replace(tzinfo=timezone.utc) + \
timedelta(minutes=timezone_offset)
last_seen_datetime = last_seen_datetime_local.strftime('%Y-%m-%dT%H:%M:%S')
else:
last_seen_datetime = None
result = {"id": row[0],
"name": row[1],
"uuid": row[2],
"gateway": gateway_dict.get(row[3]),
"protocol": row[4],
"connection": row[5],
"last_seen_datetime": last_seen_datetime,
"description": row[7]
}
resp.text = json.dumps(result)
@staticmethod
@user_logger
def on_delete(req, resp, id_):
admin_control(req)
if not id_.isdigit() or int(id_) <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_data_sources "
" WHERE id = %s ", (id_,))
if cursor.fetchone() is None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_404, title='API.NOT_FOUND',
description='API.DATA_SOURCE_NOT_FOUND')
# check if this data source is being used by any meters
cursor.execute(" SELECT DISTINCT(m.name) "
" FROM tbl_meters m, tbl_meters_points mp, tbl_points p, tbl_data_sources ds "
" WHERE m.id = mp.meter_id AND mp.point_id = p.id AND p.data_source_id = ds.id "
" AND ds.id = %s "
" LIMIT 1 ",
(id_,))
row_meter = cursor.fetchone()
if row_meter is not None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.THIS_DATA_SOURCE_IS_BEING_USED_BY_A_METER' + row_meter[0])
cursor.execute(" DELETE FROM tbl_points WHERE data_source_id = %s ", (id_,))
cursor.execute(" DELETE FROM tbl_data_sources WHERE id = %s ", (id_,))
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_204
@staticmethod
@user_logger
def on_put(req, resp, id_):
"""Handles PUT requests"""
admin_control(req)
try:
raw_json = req.stream.read().decode('utf-8')
except Exception as ex:
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.FAILED_TO_READ_REQUEST_STREAM')
if not id_.isdigit() or int(id_) <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_ID')
new_values = json.loads(raw_json)
if 'name' not in new_values['data'].keys() or \
not isinstance(new_values['data']['name'], str) or \
len(str.strip(new_values['data']['name'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_NAME')
name = str.strip(new_values['data']['name'])
if 'gateway_id' not in new_values['data'].keys() or \
not isinstance(new_values['data']['gateway_id'], int) or \
new_values['data']['gateway_id'] <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_GATEWAY_ID')
gateway_id = new_values['data']['gateway_id']
if 'protocol' not in new_values['data'].keys() or \
not isinstance(new_values['data']['protocol'], str) or \
len(str.strip(new_values['data']['protocol'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_PROTOCOL')
protocol = new_values['data']['protocol']
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, code "
" FROM tbl_protocols ")
cursor.execute(query)
rows_protocols = cursor.fetchall()
procotol_dict = dict()
if rows_protocols is not None and len(rows_protocols) > 0:
for row in rows_protocols:
procotol_dict[row[2]] = {"id": row[0],
"name": row[1],
"code": row[2]}
if protocol not in procotol_dict.keys():
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_PROTOCOL')
if 'connection' not in new_values['data'].keys() or \
not isinstance(new_values['data']['connection'], str) or \
len(str.strip(new_values['data']['connection'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_CONNECTION')
connection = str.strip(new_values['data']['connection'])
if 'description' in new_values['data'].keys() and \
new_values['data']['description'] is not None and \
len(str(new_values['data']['description'])) > 0:
description = str.strip(new_values['data']['description'])
else:
description = None
cursor.execute(" SELECT name "
" FROM tbl_data_sources "
" WHERE id = %s ", (id_,))
if cursor.fetchone() is None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_404, title='API.NOT_FOUND',
description='API.DATA_SOURCE_NOT_FOUND')
cursor.execute(" SELECT name "
" FROM tbl_gateways "
" WHERE id = %s ", (gateway_id,))
if cursor.fetchone() is None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_GATEWAY_ID')
update_row = (" UPDATE tbl_data_sources "
" SET name = %s, gateway_id = %s, protocol = %s, connection = %s, description = %s "
" WHERE id = %s ")
cursor.execute(update_row, (name,
gateway_id,
protocol,
connection,
description,
id_,))
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_200
class DataSourcePointCollection:
def __init__(self):
""""Initializes DataSourcePointCollection"""
pass
@staticmethod
def on_options(req, resp):
resp.status = falcon.HTTP_200
@staticmethod
def on_get(req, resp, id_):
admin_control(req)
if not id_.isdigit() or int(id_) <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_ID')
cnx_system_db = mysql.connector.connect(**config.myems_system_db)
cursor_system_db = cnx_system_db.cursor()
cursor_system_db.execute(" SELECT name "
" FROM tbl_data_sources "
" WHERE id = %s ", (id_,))
if cursor_system_db.fetchone() is None:
cursor_system_db.close()
cnx_system_db.close()
raise falcon.HTTPError(status=falcon.HTTP_404, title='API.NOT_FOUND',
description='API.DATA_SOURCE_NOT_FOUND')
result = list()
# Get points of the data source
# NOTE: there is no uuid in tbl_points
query_point = (" SELECT id, name, object_type, "
" units, high_limit, low_limit, higher_limit, lower_limit, ratio, "
" is_trend, is_virtual, address, description "
" FROM tbl_points "
" WHERE data_source_id = %s "
" ORDER BY id ")
cursor_system_db.execute(query_point, (id_,))
rows_point = cursor_system_db.fetchall()
cnx_historical_db = mysql.connector.connect(**config.myems_historical_db)
cursor_historical_db = cnx_historical_db.cursor()
cursor_historical_db.execute(" SELECT point_id, actual_value "
" FROM tbl_analog_value_latest "
" WHERE utc_date_time >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 10 MINUTE)")
analog_values = cursor_historical_db.fetchall()
analog_value_dict = dict()
for v in analog_values:
analog_value_dict[v[0]] = v[1]
cursor_historical_db.execute(" SELECT point_id, actual_value "
" FROM tbl_digital_value_latest "
" WHERE utc_date_time >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 10 MINUTE)")
digital_values = cursor_historical_db.fetchall()
digital_value_dict = dict()
for v in digital_values:
digital_value_dict[v[0]] = v[1]
cursor_historical_db.execute(" SELECT point_id, actual_value "
" FROM tbl_energy_value_latest "
" WHERE utc_date_time >= DATE_SUB(UTC_TIMESTAMP(), INTERVAL 10 MINUTE)")
energy_values = cursor_historical_db.fetchall()
energy_value_dict = dict()
for v in energy_values:
energy_value_dict[v[0]] = v[1]
if rows_point is not None and len(rows_point) > 0:
for row in rows_point:
if row[2] == 'ANALOG_VALUE':
latest_value = analog_value_dict.get(row[0], None)
latest_value = Decimal(latest_value) if latest_value is not None else None
elif row[2] == 'DIGITAL_VALUE':
latest_value = digital_value_dict.get(row[0], None)
latest_value = int(latest_value) if latest_value is not None else None
elif row[2] == 'ENERGY_VALUE':
latest_value = energy_value_dict.get(row[0], None)
latest_value = Decimal(latest_value) if latest_value is not None else None
meta_result = {"id": row[0],
"name": row[1],
"object_type": row[2],
"units": row[3],
"high_limit": row[4],
"low_limit": row[5],
"higher_limit": row[6],
"lower_limit": row[7],
"ratio": Decimal(row[8]),
"is_trend": bool(row[9]),
"is_virtual": bool(row[10]),
"address": row[11],
"description": row[12],
"latest_value": latest_value,
}
result.append(meta_result)
cursor_system_db.close()
cnx_system_db.close()
cursor_historical_db.close()
cnx_historical_db.close()
resp.text = json.dumps(result)
class DataSourceExport:
def __init__(self):
""""Initializes DataSourceExport"""
pass
@staticmethod
def on_options(req, resp, id_):
resp.status = falcon.HTTP_200
@staticmethod
def on_get(req, resp, id_):
admin_control(req)
if not id_.isdigit() or int(id_) <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, uuid "
" FROM tbl_gateways ")
cursor.execute(query)
rows_gateways = cursor.fetchall()
gateway_dict = dict()
if rows_gateways is not None and len(rows_gateways) > 0:
for row in rows_gateways:
gateway_dict[row[0]] = {"id": row[0],
"name": row[1],
"uuid": row[2]}
query = (" SELECT id, name, uuid, gateway_id, protocol, connection, last_seen_datetime_utc, description "
" FROM tbl_data_sources "
" WHERE id = %s ")
cursor.execute(query, (id_,))
row = cursor.fetchone()
if row is None:
raise falcon.HTTPError(status=falcon.HTTP_404, title='API.NOT_FOUND',
description='API.DATA_SOURCE_NOT_FOUND')
timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
if config.utc_offset[0] == '-':
timezone_offset = -timezone_offset
if isinstance(row[6], datetime):
last_seen_datetime_local = row[6].replace(tzinfo=timezone.utc) + \
timedelta(minutes=timezone_offset)
last_seen_datetime = last_seen_datetime_local.strftime('%Y-%m-%dT%H:%M:%S')
else:
last_seen_datetime = None
result = {"name": row[1],
"uuid": row[2],
"gateway": gateway_dict.get(row[3]),
"protocol": row[4],
"connection": row[5],
"last_seen_datetime": last_seen_datetime,
"description": row[7],
"points": None
}
point_result = list()
# Get points of the data source
# NOTE: there is no uuid in tbl_points
query_point = (" SELECT id, name, object_type, "
" units, high_limit, low_limit, higher_limit, lower_limit, ratio, "
" is_trend, is_virtual, address, description "
" FROM tbl_points "
" WHERE data_source_id = %s "
" ORDER BY id ")
cursor.execute(query_point, (id_,))
rows_point = cursor.fetchall()
if rows_point is not None and len(rows_point) > 0:
for row in rows_point:
meta_result = {"id": row[0],
"name": row[1],
"object_type": row[2],
"units": row[3],
"high_limit": row[4],
"low_limit": row[5],
"higher_limit": row[6],
"lower_limit": row[7],
"ratio": Decimal(row[8]),
"is_trend": bool(row[9]),
"is_virtual": bool(row[10]),
"address": row[11],
"description": row[12]}
point_result.append(meta_result)
result['points'] = point_result
cursor.close()
cnx.close()
resp.text = json.dumps(result)
class DataSourceImport:
def __init__(self):
""""Initializes DataSourceImport"""
pass
@staticmethod
def on_options(req, resp):
resp.status = falcon.HTTP_200
@staticmethod
@user_logger
def on_post(req, resp):
"""Handles POST requests"""
admin_control(req)
try:
raw_json = req.stream.read().decode('utf-8')
except Exception as ex:
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.FAILED_TO_READ_REQUEST_STREAM')
new_values = json.loads(raw_json)
if 'name' not in new_values.keys() or \
not isinstance(new_values['name'], str) or \
len(str.strip(new_values['name'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_NAME')
name = str.strip(new_values['name'])
if 'gateway' not in new_values.keys() or \
'id' not in new_values['gateway'].keys() or \
not isinstance(new_values['gateway']['id'], int) or \
new_values['gateway']['id'] <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_GATEWAY_ID')
gateway_id = new_values['gateway']['id']
if 'protocol' not in new_values.keys() \
or new_values['protocol'] not in \
('bacnet-ip',
'cassandra',
'clickhouse',
'coap',
'controllogix',
'dlt645',
'dtu-rtu',
'dtu-tcp',
'dtu-mqtt',
'elexon-bmrs',
'iec104',
'influxdb',
'lora',
'modbus-rtu',
'modbus-tcp',
'mongodb',
'mqtt-acrel',
'mqtt-adw300',
'mqtt-huiju',
'mqtt-md4220',
'mqtt-seg',
'mqtt-weilan',
'mqtt-xintianli',
'mqtt-zhongxian',
'mqtt',
'mysql',
'opc-ua',
'oracle',
'postgresql',
'profibus',
'profinet',
's7',
'simulation',
'sqlserver',
'tdengine',
'weather',):
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_PROTOCOL')
protocol = new_values['protocol']
if 'connection' not in new_values.keys() or \
not isinstance(new_values['connection'], str) or \
len(str.strip(new_values['connection'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_CONNECTION')
connection = str.strip(new_values['connection'])
if 'description' in new_values.keys() and \
new_values['description'] is not None and \
len(str(new_values['description'])) > 0:
description = str.strip(new_values['description'])
else:
description = None
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_data_sources "
" WHERE name = %s ", (name,))
if cursor.fetchone() is not None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.DATA_SOURCE_NAME_IS_ALREADY_IN_USE')
cursor.execute(" SELECT name "
" FROM tbl_gateways "
" WHERE id = %s ", (gateway_id,))
if cursor.fetchone() is None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_GATEWAY_ID')
add_values = (" INSERT INTO tbl_data_sources (name, uuid, gateway_id, protocol, connection, description) "
" VALUES (%s, %s, %s, %s, %s, %s) ")
cursor.execute(add_values, (name,
str(uuid.uuid4()),
gateway_id,
protocol,
connection,
description))
new_id = cursor.lastrowid
if new_values['points'] is not None and len(new_values['points']) > 0:
for point in new_values['points']:
# todo: validate point properties
add_value = (" INSERT INTO tbl_points (name, data_source_id, object_type, units, "
" high_limit, low_limit, higher_limit, lower_limit, ratio, "
" is_trend, is_virtual, address, description) "
" VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s) ")
cursor.execute(add_value, (point['name'],
new_id,
point['object_type'],
point['units'],
point['high_limit'],
point['low_limit'],
point['higher_limit'],
point['lower_limit'],
point['ratio'],
point['is_trend'],
point['is_virtual'],
point['address'],
point['description']))
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_201
resp.location = '/datasources/' + str(new_id)
class DataSourceClone:
def __init__(self):
"""Initializes Class"""
pass
@staticmethod
def on_options(req, resp, id_):
resp.status = falcon.HTTP_200
@staticmethod
@user_logger
def on_post(req, resp, id_):
"""Handles POST requests"""
admin_control(req)
if not id_.isdigit() or int(id_) <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_DATA_SOURCE_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, uuid, gateway_id, protocol, connection, description "
" FROM tbl_data_sources "
" WHERE id = %s ")
cursor.execute(query, (id_,))
row = cursor.fetchone()
if row is None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_404, title='API.NOT_FOUND',
description='API.DATA_SOURCE_NOT_FOUND')
meta_result = {"id": row[0],
"name": row[1],
"uuid": row[2],
"gateway_id": row[3],
"protocol": row[4],
"connection": row[5],
"description": row[6],
"points": None
}
point_result = list()
# Get points of the data source
# NOTE: there is no uuid in tbl_points
query_point = (" SELECT id, name, object_type, "
" units, high_limit, low_limit, higher_limit, lower_limit, ratio, "
" is_trend, is_virtual, address, description "
" FROM tbl_points "
" WHERE data_source_id = %s "
" ORDER BY id ")
cursor.execute(query_point, (id_,))
rows_point = cursor.fetchall()
if rows_point is not None and len(rows_point) > 0:
for row in rows_point:
result = {"id": row[0],
"name": row[1],
"object_type": row[2],
"units": row[3],
"high_limit": row[4],
"low_limit": row[5],
"higher_limit": row[6],
"lower_limit": row[7],
"ratio": Decimal(row[8]),
"is_trend": bool(row[9]),
"is_virtual": bool(row[10]),
"address": row[11],
"description": row[12]}
point_result.append(result)
meta_result['points'] = point_result
timezone_offset = int(config.utc_offset[1:3]) * 60 + int(config.utc_offset[4:6])
if config.utc_offset[0] == '-':
timezone_offset = -timezone_offset
new_name = str.strip(meta_result['name']) + \
(datetime.utcnow() + timedelta(minutes=timezone_offset)).isoformat(sep='-', timespec='seconds')
add_values = (" INSERT INTO tbl_data_sources (name, uuid, gateway_id, protocol, connection, description) "
" VALUES (%s, %s, %s, %s, %s, %s) ")
cursor.execute(add_values, (new_name,
str(uuid.uuid4()),
meta_result['gateway_id'],
meta_result['protocol'],
meta_result['connection'],
meta_result['description']))
new_id = cursor.lastrowid
if meta_result['points'] is not None:
for point in meta_result['points']:
add_value = (" INSERT INTO tbl_points (name, data_source_id, object_type, units, "
" high_limit, low_limit, higher_limit, lower_limit, ratio, "
" is_trend, is_virtual, address, description) "
" VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s) ")
cursor.execute(add_value, (point['name'],
new_id,
point['object_type'],
point['units'],
point['high_limit'],
point['low_limit'],
point['higher_limit'],
point['lower_limit'],
point['ratio'],
point['is_trend'],
point['is_virtual'],
point['address'],
point['description']))
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_201
resp.location = '/datasources/' + str(new_id)