first rather simple implementation of to_dict() for our Sensors object

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

diff --git a/web/seepark_web.py b/web/seepark_web.py
index 753456ff8d15e615d407bbafdd51c4a0b6c7b305..3ee9d9408ba6e08e4b52c04da6e133ab86deb3cd 100644 (file)
--- a/web/seepark_web.py
+++ b/web/seepark_web.py
@@ -1,46 +1,198 @@
-from flask import Flask, render_template, jsonify

 from random import uniform
 from random import uniform

+import datetime

 import time
 import time

+import configparser
+import os
+import sys
+from collections import defaultdict
+from flask import Flask, render_template, jsonify, request
+import flask.json
+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):
+    def default(self, object):
+        if isinstance(object, datetime.datetime):
+            return object.isoformat()
+        return super().default(object)
+
+
+def parse_datetime(date_str):
+    return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')
+
+
+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('temperature', 'mainsensor')
+

 app = Flask(__name__)
 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':
+        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)
+        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"""
+    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(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/<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)))

 
 

-@app.route("/data")
-def data():

     data = {
     data = {

-        '0316a2193bff': [20, 19, 20, 21, 20, 21],
-        '0316a2193bff_x': ['2018-05-20 12:00:01', '2018-05-21 13:01:02', '2018-05-22 14:05:00', '2018-05-23 14:05:01', '2018-05-24 14:05:00',                        '2018-05-27 14:05:02'],
-        '0316a21383ff': [27, 32, 26, 29, 30, 31],
-        '0316a21383ff_x': [                       '2018-05-21 18:00:00', '2018-05-22 14:05:00', '2018-05-23 14:05:00', '2018-05-24 14:05:02', '2018-05-25 14:05:01', '2018-05-27 14:05:01'],
+        '0316a2193bff':   s4m,
+        '0316a2193bff_x': s4m_x,
+        '0316a21383ff':   s5m,
+        '0316a21383ff_x': s5m_x,

         }
 
         }
 

-#    years = 3
-#    granularity = 5 # minutes
-#    samples = 60/granularity * 24 * 365 * years # every "granularity" minutes for "years" years
-#    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("/")
 def index():
     return jsonify(data)
 
 
 @app.route("/")
 def index():

-    return render_template('seepark_web.html')
+    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,
+    )