myems-api/core/energyitem.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 EnergyItemCollection:
def __init__(self):
""""Initializes EnergyItemCollection"""
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 "
" FROM tbl_energy_categories ")
cursor.execute(query)
rows_energy_categories = cursor.fetchall()
energy_category_dict = dict()
if rows_energy_categories is not None and len(rows_energy_categories) > 0:
for row in rows_energy_categories:
energy_category_dict[row[0]] = {"id": row[0],
"name": row[1],
"uuid": row[2]}
query = (" SELECT id, name, uuid, energy_category_id "
" FROM tbl_energy_items "
" 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],
"energy_category": energy_category_dict.get(row[3], None)}
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_ITEM_NAME')
name = str.strip(new_values['data']['name'])
if 'energy_category_id' not in new_values['data'].keys() or \
new_values['data']['energy_category_id'] <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_ENERGY_CATEGORY_ID')
energy_category_id = new_values['data']['energy_category_id']
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_energy_items "
" 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_ITEM_NAME_IS_ALREADY_IN_USE')
cursor.execute(" SELECT name "
" FROM tbl_energy_categories "
" WHERE id = %s ",
(energy_category_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')
add_value = (" INSERT INTO tbl_energy_items "
" (name, uuid, energy_category_id) "
" VALUES (%s, %s, %s) ")
cursor.execute(add_value, (name,
str(uuid.uuid4()),
energy_category_id))
new_id = cursor.lastrowid
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_201
resp.location = '/energyitems/' + str(new_id)
class EnergyItemItem:
def __init__(self):
""""Initializes EnergyItemItem"""
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_ITEM_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
query = (" SELECT id, name, uuid "
" FROM tbl_energy_categories ")
cursor.execute(query)
rows_energy_categories = cursor.fetchall()
energy_category_dict = dict()
if rows_energy_categories is not None and len(rows_energy_categories) > 0:
for row in rows_energy_categories:
energy_category_dict[row[0]] = {"id": row[0],
"name": row[1],
"uuid": row[2]}
query = (" SELECT id, name, uuid, energy_category_id "
" FROM tbl_energy_items "
" 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_ITEM_NOT_FOUND')
result = {"id": row[0],
"name": row[1],
"uuid": row[2],
"energy_category": energy_category_dict.get(row[3], None)}
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_ITEM_ID')
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_energy_items "
" 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_ITEM_NOT_FOUND')
cursor.execute(" SELECT id "
" FROM tbl_meters "
" WHERE energy_item_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_ITEM_USED_IN_METER')
cursor.execute(" SELECT id "
" FROM tbl_virtual_meters "
" WHERE energy_item_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_ITEM_USED_IN_VIRTUAL_METER')
cursor.execute(" SELECT id "
" FROM tbl_offline_meters "
" WHERE energy_item_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_ITEM_USED_IN_OFFLINE_METER')
cursor.execute(" DELETE FROM tbl_energy_items 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_ITEM_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_ITEM_NAME')
name = str.strip(new_values['data']['name'])
if 'energy_category_id' not in new_values['data'].keys() or new_values['data']['energy_category_id'] <= 0:
raise falcon.HTTPError(status=falcon.HTTP_400, title='API.BAD_REQUEST',
description='API.INVALID_ENERGY_CATEGORY_ID')
energy_category_id = new_values['data']['energy_category_id']
cnx = mysql.connector.connect(**config.myems_system_db)
cursor = cnx.cursor()
cursor.execute(" SELECT name "
" FROM tbl_energy_items "
" 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_ITEM_NOT_FOUND')
cursor.execute(" SELECT name "
" FROM tbl_energy_items "
" 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_ITEM_NAME_IS_ALREADY_IN_USE')
cursor.execute(" SELECT name "
" FROM tbl_energy_categories "
" WHERE id = %s ",
(energy_category_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')
update_row = (" UPDATE tbl_energy_items "
" SET name = %s, energy_category_id = %s "
" WHERE id = %s ")
cursor.execute(update_row, (name,
energy_category_id,
id_,))
cnx.commit()
cursor.close()
cnx.close()
resp.status = falcon.HTTP_200