-from random import uniform
import datetime
import time
import configparser
import os
-from flask import Flask, render_template, jsonify, request
+import sys
+from collections import defaultdict
+from flask import Flask, render_template, jsonify, request, abort, Response
import flask.json
-from sqlalchemy import create_engine
+from flask_sqlalchemy import SQLAlchemy, inspect
+from sqlalchemy import func
+
+
+# https://stackoverflow.com/a/37350445
+def sqlalchemy_model_to_dict(model):
+ return {c.key: getattr(model, c.key)
+ for c in inspect(model).mapper.column_attrs}
class JSONEncoder(flask.json.JSONEncoder):
def default(self, object):
if isinstance(object, datetime.datetime):
return object.isoformat()
+ elif isinstance(object, db.Model):
+ return sqlalchemy_model_to_dict(object)
return super().default(object)
return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')
-app = Flask(__name__)
-app.json_encoder = JSONEncoder
+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')
+ 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('webapp', '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)
-def open_engine(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]
-
- mode = request.args.get('mode', 'full')
- if mode == 'consolidated':
- if begin is None or end is None:
- pass
- else:
- # copied from munin/master/_bin/munin-cgi-graph.in
- resolutions = dict(
- day = 300,
- week = 1800,
- month = 7200,
- year = 86400,
- )
- duration = (end - begin).total_seconds()
- day = 60 * 60 * 24
- if duration < day:
- resolution = resolutions['day']
- elif duration < 7 * day:
- resolution = resolutions['week']
- elif duration < 31 * day:
- resolution = resolutions['month']
- else:
- resolution = resolutions['year']
- # TODO: filter out samples from 'result'
- # like loop over results and skip if timestamp(n+1)-timestamp(n)<resolution
+class Sensors(db.Model):
+ __tablename__ = 'sensors'
+
+
+class OpenWeatherMap(db.Model):
+ __tablename__ = 'openweathermap'
+
+
+def calc_grouping_resolution(begin, end):
+ """How many data points should be between the timestamps begin and end?"""
+ # copied from munin/master/_bin/munin-cgi-graph.in
+ resolutions = dict(
+ day = 300,
+ week = 1800,
+ month = 7200,
+ year = 86400,
+ )
+ duration = (end - begin).total_seconds()
+ day = 60 * 60 * 24
+ if duration <= day:
+ resolution = resolutions['day']
+ elif duration <= 7 * day:
+ resolution = resolutions['week']
+ elif duration <= 31 * day:
+ resolution = resolutions['month']
+ else:
+ resolution = resolutions['year']
+ return resolution
+
+
+def select_sensordata(sensor_id, sensor_type, begin, end):
+ query = Sensors.query
+ if sensor_id is not None:
+ query = query.filter(Sensors.sensor_id == sensor_id)
+ if sensor_type is not None:
+ query = query.filter(Sensors.value_type == sensor_type)
+ if begin is not None:
+ query = query.filter(Sensors.timestamp >= begin)
+ if end is not None:
+ query = query.filter(Sensors.timestamp <= end)
+ return query.all()
+
+
+def select_sensordata_grouped(sensor_id, sensor_type, begin, end):
+ # determine resolution (interval in seconds for data points)
+ resolution = calc_grouping_resolution(begin, end)
+
+ # Let the database do the grouping. Example in SQL (MySQL):
+ # select to_seconds(datetime) DIV (60*60*24) as interval_id, min(datetime), max(datetime), min(temp), avg(temp), max(temp), count(temp) from openweathermap group by interval_id order by interval_id;
+ query = db.session.query(func.to_seconds(Sensors.timestamp).op('div')(resolution).label('g'),
+ func.from_unixtime(func.avg(func.unix_timestamp(Sensors.timestamp))).label('timestamp'),
+ func.avg(Sensors.value).label('value'),
+ Sensors.sensor_id, Sensors.value_type, Sensors.sensor_name)
+ if sensor_id is not None:
+ query = query.filter(Sensors.sensor_id == sensor_id)
+ if sensor_type is not None:
+ query = query.filter(Sensors.value_type == sensor_type)
+ query = query.filter(Sensors.timestamp >= begin)
+ query = query.filter(Sensors.timestamp <= end)
+ query = query.group_by('g', Sensors.sensor_id, Sensors.value_type, Sensors.sensor_name)
+ return query.all()
+
+
+def select_openweatherdata(cityid, begin, end):
+ query = OpenWeatherMap.query.filter(OpenWeatherMap.cityid == cityid)
+ if begin is not None:
+ query = query.filter(OpenWeatherMap.datetime >= begin)
+ if end is not None:
+ query = query.filter(OpenWeatherMap.datetime <= end)
+ return query.all()
+
+
+def select_openweatherdata_grouped(cityid, begin, end):
+ # determine resolution (interval in seconds for data points)
+ resolution = calc_grouping_resolution(begin, end)
+
+ # Let the database do the grouping. Example in SQL (MySQL):
+ # select to_seconds(datetime) DIV (60*60*24) as interval_id, min(datetime), max(datetime), min(temp), avg(temp), max(temp), count(temp) from openweathermap group by interval_id order by interval_id;
+ query = db.session.query(func.to_seconds(OpenWeatherMap.datetime).op('div')(resolution).label('g'),
+ func.from_unixtime(func.avg(func.unix_timestamp(OpenWeatherMap.datetime))).label('datetime'),
+ func.avg(OpenWeatherMap.temp).label('temp'),
+ OpenWeatherMap.cityid)
+ OpenWeatherMap.query.filter(OpenWeatherMap.cityid == cityid)
+ query = query.filter(OpenWeatherMap.datetime >= begin)
+ query = query.filter(OpenWeatherMap.datetime <= end)
+ query = query.group_by('g', OpenWeatherMap.cityid)
+ return query.all()
+
+
+def convert_to_c3(result, id, field_x, field_y):
+ c3result = defaultdict(list)
+ for row in result:
+ c3result[str(getattr(row, id))].append(getattr(row, field_y))
+ dt = getattr(row, field_x).strftime('%Y-%m-%d %H:%M:%S')
+ c3result[str(getattr(row, id)) + '_x'].append(dt)
+ return c3result
+
+
+def request_arg(key, type, default=None):
+ """Returns the key from the request if available, otherwise the default value.
+ In case type is provided and the key is present, the value is converted by calling type.
+ In other words: Reimplement request.args.get but don't return default value if
+ type raises a ValueError."""
+ if key in request.args:
+ try:
+ return type(request.args[key])
+ except ValueError as e:
+ abort(Response(str(e), 400))
+ else:
+ return default
+
+
+def sensordata(sensor_id=None, sensor_type=None):
+ begin = request_arg('begin', parse_datetime)
+ end = request_arg('end', parse_datetime)
+ mode = request.args.get('mode', 'full')
+ format = request.args.get('format', 'default')
+
+ if mode == 'full':
+ result = select_sensordata(sensor_id, sensor_type, begin, end)
+ elif mode == 'consolidated':
+ if begin is None or end is None:
+ abort(Response('begin and end have to be set for mode==consolidated', 400))
+ result = select_sensordata_grouped(sensor_id, sensor_type, begin, end)
+ else:
+ abort(Response('unknown value for mode', 400))
+
+ if format == 'c3':
+ return convert_to_c3(result, 'sensor_id', 'timestamp', 'value')
+ return result
+
+
+def openweathermapdata(cityid):
+ begin = request_arg('begin', parse_datetime)
+ end = request_arg('end', parse_datetime)
+ mode = request.args.get('mode', 'full')
+ format = request.args.get('format', 'default')
+
+ if mode == 'full':
+ result = select_openweatherdata(cityid, begin, end)
+ elif mode == 'consolidated':
+ if begin is None or end is None:
+ abort(Response('begin and end have to be set for mode==consolidated', 400))
+ result = select_openweatherdata_grouped(cityid, begin, end)
+ else:
+ abort(Response('unknown value for mode', 400))
+
+ if format == 'c3':
+ return convert_to_c3(result, 'cityid', 'datetime', 'temp')
return result
+def currentairtemperature(cityid):
+ result = OpenWeatherMap.query.filter_by(cityid=cityid).order_by(OpenWeatherMap.datetime.desc()).first()
+ return result.temp, result.datetime
+
+
+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 = sensordata(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 = sensordata(sensor_type=sensor_type)
+ return jsonify(result)
+
+
+@app.route('/api/<version>/openweathermap/cities')
+def openweathermap_cities(version):
+ """List all city IDs found in the database"""
+ result = db.session.query(OpenWeatherMap.cityid).distinct().all()
return jsonify(result)
-@app.route('/data/', defaults={'timespan': 1})
-@app.route("/data/<int:timespan>", methods=['GET'])
-def data(timespan):
- granularity = 5 * timespan # (every) minute(s) per day
- samples = 60/granularity * 24 * timespan # per hour over whole timespan
- s4m = []
- s4m_x = []
- s5m = []
- s5m_x = []
- end = time.time()
- start = end - samples * granularity * 60
-
- for i in range(int(samples)):
- s4m.append(uniform(-10,30))
- s5m.append(uniform(-10,30))
- s4mt = uniform(start, end)
- s5mt = uniform(start, end)
- s4m_x.append(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(s4mt)))
- s5m_x.append(time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(s5mt)))
-
- data = {
- '0316a2193bff': s4m,
- '0316a2193bff_x': s4m_x,
- '0316a21383ff': s5m,
- '0316a21383ff_x': s5m_x,
- }
-
- return jsonify(data)
+@app.route('/api/<version>/openweathermap/city/<cityid>')
+def openweathermap_city(version, cityid):
+ """List all data found for a city"""
+ result = openweathermapdata(cityid=cityid)
+ return jsonify(result)
@app.route("/")
def index():
- return render_template('seepark_web.html', apikey=apikey)
+ airvalue, airtime = currentairtemperature(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