import time
import configparser
import os
+import sys
+from collections import defaultdict
from flask import Flask, render_template, jsonify, request
import flask.json
-from sqlalchemy import create_engine
+from flask_sqlalchemy import SQLAlchemy, inspect
+
+
+app_path = os.path.dirname(os.path.realpath(__file__))
+lib_path = os.path.join(cur_path, '..')
+sys.path.append(lib_path)
+from seeparklib.openweathermap import openweathermap_json, OpenWeatherMapError
class JSONEncoder(flask.json.JSONEncoder):
return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')
-app = Flask(__name__)
-app.json_encoder = JSONEncoder
-config = configparser.ConfigParser()
-config.read(os.environ['SEEPARKINI'])
-apikey = config.get('openweathermap', 'apikey')
-
-
-def open_engine(config):
+def get_sqlalchemy_database_uri(config):
user = config.get('database', 'user')
pwd = config.get('database', 'password')
host = config.get('database', 'hostname')
db = config.get('database', 'database')
- engine = create_engine('mysql+mysqldb://{}:{}@{}/{}'.format(user, pwd, host, db), echo=False)
- return engine
-
-
-def select_sensordata(initial_where, initial_sql_args):
- engine = open_engine(config)
- with engine.connect() as conn:
- where = [initial_where]
- sql_args = [initial_sql_args]
- begin = None
- end = None
- if 'begin' in request.args:
- where.append('timestamp>=%s')
- begin = request.args.get('begin', None, parse_datetime)
- sql_args.append(begin)
- if 'end' in request.args:
- where.append('timestamp<=%s')
- end = request.args.get('end', None, parse_datetime)
- sql_args.append(end)
- sql = 'select * from sensors where {} order by id'.format(' and '.join(where))
- cursor = conn.execute(sql, *sql_args)
- result = [dict(row) for row in cursor]
+ return 'mysql+mysqldb://{}:{}@{}/{}'.format(user, pwd, host, db)
+
+
+config = configparser.ConfigParser()
+config.read(os.environ['SEEPARKINI'])
+apikey = config.get('openweathermap', 'apikey')
+cityid = config.get('openweathermap', 'cityid')
+mainsensor = config.get('temperature', 'mainsensor')
+
+app = Flask(__name__)
+app.json_encoder = JSONEncoder
+app.config['SQLALCHEMY_DATABASE_URI'] = get_sqlalchemy_database_uri(config)
+app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+db = SQLAlchemy(app)
+db.reflect(app=app)
+
+
+class Sensors(db.Model):
+ __tablename__ = 'sensors'
+
+ # https://stackoverflow.com/a/37350445
+ def to_dict(self):
+ return {c.key: getattr(self, c.key)
+ for c in inspect(self).mapper.column_attrs}
+
+def select_sensordata(initial_where):
+ query = Sensors.query.filter(initial_where)
+ begin = request.args.get('begin', None, parse_datetime)
+ end = request.args.get('end', None, parse_datetime)
+ if begin is not None:
+ query = query.filter(Sensors.timestamp >= begin)
+ if end is not None:
+ query = query.filter(Sensors.timestamp <= end)
+ result = query.all()
mode = request.args.get('mode', 'full')
if mode == 'consolidated':
# TODO: filter out samples from 'result'
# like loop over results and skip if timestamp(n+1)-timestamp(n)<resolution
- return result
+ format = request.args.get('format', 'default')
+ if format == 'c3':
+ c3result = defaultdict(list)
+ for row in result:
+ c3result[row.sensor_id].append(row.value)
+ dt = row.timestamp.strftime('%Y-%m-%d %H:%M:%S')
+ c3result[row.sensor_id + '_x'].append(dt)
+ return c3result
+ else:
+ return [row.to_dict() for row in result]
+
+
+def currentairtemperature(apikey, cityid):
+ """Retruns the tuple temperature, datetime (as float, datetime) in case of success, otherwise None, None."""
+ try:
+ weatherdata = openweathermap_json(apikey, cityid)
+ return weatherdata['main']['temp'], datetime.datetime.fromtimestamp(weatherdata['dt'])
+ except OpenWeatherMapError:
+ return None, None
+
+
+def currentwatertemperature(sensorid):
+ result = Sensors.query.filter_by(sensor_id=sensorid).order_by(Sensors.timestamp.desc()).first()
+ return result.value, result.timestamp
@app.route('/api/<version>/sensors/')
def sensors(version):
"""List all sensors found in the database"""
- engine = open_engine(config)
- with engine.connect() as conn:
- cursor = conn.execute('select distinct sensor_id, sensor_name, value_type from sensors')
- result = [dict(row) for row in cursor]
- return jsonify(result)
+ result = db.session.query(Sensors.sensor_id, Sensors.sensor_name, Sensors.value_type).distinct().all()
+ return jsonify(result)
@app.route('/api/<version>/sensor/id/<sensor_id>')
begin=<datetime>, optional, format like "2018-05-19T21:07:53"
end=<datetime>, optional, format like "2018-05-19T21:07:53"
mode=<full|consolidated>, optional. return all rows (default) or with lower resolution (for charts)
+ format=<default|c3>, optional. return result as returned by sqlalchemy (default) or formatted for c3.js
"""
- result = select_sensordata('sensor_id=%s', sensor_id)
+ result = select_sensordata(Sensors.sensor_id == sensor_id)
return jsonify(result)
begin=<datetime>, optional, format like "2018-05-19T21:07:53"
end=<datetime>, optional, format like "2018-05-19T21:07:53"
mode=<full|consolidated>, optional. return all rows (default) or with lower resolution (for charts)
+ format=<default|c3>, optional. return result as returned by sqlalchemy (default) or formatted for c3.js
"""
- result = select_sensordata('value_type=%s', sensor_type)
+ result = select_sensordata(Sensors.value_type == sensor_type)
return jsonify(result)
@app.route("/")
def index():
- return render_template('seepark_web.html', apikey=apikey)
-
+ airvalue, airtime = currentairtemperature(apikey, cityid)
+ watervalue, watertime = currentwatertemperature(mainsensor)
+
+ return render_template(
+ 'seepark_web.html',
+ apikey=apikey,
+ watervalue=watervalue,
+ watertime=watertime,
+ airvalue=airvalue,
+ airtime=airtime,
+ )
ToastFreeware / chrisu / seepark.git / blobdiff