read main(water)sensor from ini file

[chrisu/seepark.git] / web / seepark_web.py

diff --git a/web/seepark_web.py b/web/seepark_web.py
index b9a3bb14418312830af2c2ca6d187f1e1c3d668d..de719ba0022292d79d7c296ee6660321e19a47ae 100644 (file)
--- a/web/seepark_web.py
+++ b/web/seepark_web.py
@@ -1,33 +1,151 @@
-from flask import Flask, render_template, jsonify

 from random import uniform
 from random import uniform

+import datetime

 import time
 import configparser
 import os
 import time
 import configparser
 import os

-from sqlalchemy import create_engine
-app = Flask(__name__)
+import sys
+from collections import defaultdict
+from flask import Flask, render_template, jsonify, request
+import flask.json
+from flask_sqlalchemy import SQLAlchemy
+
+
+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):
+    def default(self, object):
+        if isinstance(object, datetime.datetime):
+            return object.isoformat()
+        return super().default(object)

 
 

-config = configparser.ConfigParser()
-config.read(os.environ['SEEPARKINI'])
-apikey = config.get('openweathermap', 'apikey')

 
 

+def parse_datetime(date_str):
+    return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')

 
 

-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')
     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
+    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)

 
 
 
 

-@app.route('/api/<version>/sensors')
+class Sensors(db.Model):
+    __tablename__ = 'sensors'
+
+
+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':
+        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
+
+    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)
+        result = c3result
+    return 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"""
 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>')
+def sensorid(version, sensor_id):
+    """Return all data for a specific sensor
+
+    URL parameters:
+    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(Sensors.sensor_id == sensor_id)
+    return jsonify([row._asdict() for row in result])
+
+
+@app.route('/api/<version>/sensor/type/<sensor_type>')
+def sensortype(version, sensor_type):
+    """Return all data for a specific sensor type
+
+    URL parameters:
+    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(Sensors.value_type == sensor_type)
+    return jsonify(result)

 
 
 @app.route('/data/', defaults={'timespan': 1})
 
 
 @app.route('/data/', defaults={'timespan': 1})


@@ -62,5 +180,14 @@ def data(timespan):
 
 @app.route("/")
 def index():
 
 @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,
+    )