myems-api/core/energycategory.py
import uuid
import falcon
import mysql.connector
import simplejson as json
from core.useractivity import user_logger, admin_control, access_control, api_key_control
import config
class EnergyCategoryCollection:
def __init__(self):
""""Initializes EnergyCategoryCollection"""
pass
@staticmethod
def on_options(req, resp):
resp.status = falcon.HTTP_200
@staticmethod
def on_get(req, resp):
if 'API-KEY' not in req.headers or \
not isinstance(req.headers['API-KEY'], str) or \
len(str.strip(req.headers['API-KEY'])) == 0:
access_control(req)
else:
api_key_control(req)
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, uuid, unit_of_measure, kgce, kgco2e "
" FROM tbl_energy_categories "
" ORDER BY id ")
cursor.execute(query)
rows = cursor.fetchall()
cursor.close()
cnx.close()
result = list()
if rows is not None and len(rows) > 0:
for row in rows:
meta_result = {"id": row[0], "name": row[1], "uuid": row[2], "unit_of_measure": row[3],
"kgce": row[4], "kgco2e": row[5]}
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_ENERGY_CATEGORY_NAME')
name = str.strip(new_values['data']['name'])
if 'unit_of_measure' not in new_values['data'].keys() or \
not isinstance(new_values['data']['unit_of_measure'], str) or \
len(str.strip(new_values['data']['unit_of_measure'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_UNIT_OF_MEASURE')
unit_of_measure = str.strip(new_values['data']['unit_of_measure'])
if 'kgce' not in new_values['data'].keys() or \
not (isinstance(new_values['data']['kgce'], float) or
isinstance(new_values['data']['kgce'], int)):
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_KGCE')
kgce = float(new_values['data']['kgce'])
if 'kgco2e' not in new_values['data'].keys() or \
not (isinstance(new_values['data']['kgco2e'], float) or
isinstance(new_values['data']['kgco2e'], int)):
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_KGCO2E')
kgco2e = float(new_values['data']['kgco2e'])
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_energy_categories "
" 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.ENERGY_CATEGORY_NAME_IS_ALREADY_IN_USE')
add_value = (" INSERT INTO tbl_energy_categories "
" (name, uuid, unit_of_measure, kgce, kgco2e) "
" VALUES (%s, %s, %s, %s, %s) ")
cursor.execute(add_value, (name,
str(uuid.uuid4()),
unit_of_measure,
kgce,
kgco2e))
new_id = cursor.lastrowid
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_201
resp.location = '/energycategories/' + str(new_id)
class EnergyCategoryItem:
def __init__(self):
""""Initializes EnergyCategoryItem"""
pass
@staticmethod
def on_options(req, resp, id_):
resp.status = falcon.HTTP_200
@staticmethod
def on_get(req, resp, id_):
if 'API-KEY' not in req.headers or \
not isinstance(req.headers['API-KEY'], str) or \
len(str.strip(req.headers['API-KEY'])) == 0:
access_control(req)
else:
api_key_control(req)
if not id_.isdigit() or int(id_) <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_ENERGY_CATEGORY_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, uuid, unit_of_measure, kgce, kgco2e "
" FROM tbl_energy_categories "
" 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.ENERGY_CATEGORY_NOT_FOUND')
result = {"id": row[0],
"name": row[1],
"uuid": row[2],
"unit_of_measure": row[3],
"kgce": row[4],
"kgco2e": row[5]}
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_ENERGY_CATEGORY_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_energy_categories "
" 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.ENERGY_CATEGORY_NOT_FOUND')
cursor.execute(" SELECT id "
" FROM tbl_meters "
" WHERE energy_category_id = %s ", (id_,))
rows_meters = cursor.fetchall()
if rows_meters is not None and len(rows_meters) > 0:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.ENERGY_CATEGORY_USED_IN_METER')
cursor.execute(" SELECT id "
" FROM tbl_virtual_meters "
" WHERE energy_category_id = %s ", (id_,))
rows_virtual_meters = cursor.fetchall()
if rows_virtual_meters is not None and len(rows_virtual_meters) > 0:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.ENERGY_CATEGORY_USED_IN_VIRTUAL_METER')
cursor.execute(" SELECT id "
" FROM tbl_offline_meters "
" WHERE energy_category_id = %s ", (id_,))
rows_offline_meters = cursor.fetchall()
if rows_offline_meters is not None and len(rows_offline_meters) > 0:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.ENERGY_CATEGORY_USED_IN_OFFLINE_METER')
cursor.execute(" SELECT id "
" FROM tbl_tariffs "
" WHERE energy_category_id = %s ", (id_,))
rows_tariffs = cursor.fetchall()
if rows_tariffs is not None and len(rows_tariffs) > 0:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.ENERGY_CATEGORY_USED_IN_TARIFFS')
cursor.execute(" SELECT id "
" FROM tbl_energy_items "
" WHERE energy_category_id = %s ", (id_,))
rows_energy_items = cursor.fetchall()
if rows_energy_items is not None and len(rows_energy_items) > 0:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400,
title='API.BAD_REQUEST',
description='API.ENERGY_CATEGORY_USED_IN_ENERGY_ITEMS')
cursor.execute(" DELETE FROM tbl_energy_categories 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_ENERGY_CATEGORY_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_ENERGY_CATEGORY_NAME')
name = str.strip(new_values['data']['name'])
if 'unit_of_measure' not in new_values['data'].keys() or \
not isinstance(new_values['data']['unit_of_measure'], str) or \
len(str.strip(new_values['data']['unit_of_measure'])) == 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_UNIT_OF_MEASURE')
unit_of_measure = str.strip(new_values['data']['unit_of_measure'])
if 'kgce' not in new_values['data'].keys() or \
not (isinstance(new_values['data']['kgce'], float) or
isinstance(new_values['data']['kgce'], int)):
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_KGCE')
kgce = float(new_values['data']['kgce'])
if 'kgco2e' not in new_values['data'].keys() or \
not (isinstance(new_values['data']['kgco2e'], float) or
isinstance(new_values['data']['kgco2e'], int)):
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_KGCO2E')
kgco2e = float(new_values['data']['kgco2e'])
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_energy_categories "
" 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.ENERGY_CATEGORY_NOT_FOUND')
cursor.execute(" SELECT name "
" FROM tbl_energy_categories "
" WHERE name = %s AND id != %s ", (name, id_))
if cursor.fetchone() is not None:
cursor.close()
cnx.close()
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.ENERGY_CATEGORY_NAME_IS_ALREADY_IN_USE')
update_row = (" UPDATE tbl_energy_categories "
" SET name = %s, unit_of_measure = %s, kgce = %s, kgco2e = %s "
" WHERE id = %s ")
cursor.execute(update_row, (name,
unit_of_measure,
kgce,
kgco2e,
id_,))
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_200