X-Git-Url: https://git.toastfreeware.priv.at/chrisu/seepark.git/blobdiff_plain/94d0742cda00973bee15f951fcba142d481b807f..cdfe54ab072113e4078b85943536df721005c64b:/web/seepark_web.py?ds=inline

diff --git a/web/seepark_web.py b/web/seepark_web.py
index fd6f785..edde374 100644
--- a/web/seepark_web.py
+++ b/web/seepark_web.py
@@ -1,18 +1,253 @@
-from flask import Flask, render_template, jsonify
+import datetime
+import time
+import configparser
+import os
+import sys
+from collections import defaultdict
+from flask import Flask, render_template, jsonify, request, abort, Response
+import flask.json
+from flask_sqlalchemy import SQLAlchemy, inspect
+
+
+app_path = os.path.dirname(os.path.realpath(__file__))
+lib_path = os.path.join(app_path, '..')
+sys.path.append(lib_path)
+from seeparklib.openweathermap import openweathermap_json, OpenWeatherMapError
+
+
+# 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)
+
+
+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.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'
+
+
+class OpenWeatherMap(db.Model):
+    __tablename__ = 'openweathermap'
+
+
+def select_sensordata(sensor_id, sensor_type, begin, end, mode):
+    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)
+    if mode == 'consolidated' and begin is not None and end is not None:
+        # copied from munin/master/_bin/munin-cgi-graph.in
+        # interval in seconds for data points
+        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'
+        # something like
+        # 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;
+    return query.all()
+
+
+def select_openweatherdata(cityid, begin, end, mode):
+    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)
+    if mode == 'consolidated' and begin is not None and end is not None:
+        # copied from munin/master/_bin/munin-cgi-graph.in
+        # interval in seconds for data points
+        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'
+        # something like 
+        # 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;
+    return query.all()
+
+
+def convert_to_c3(result, id, field_x, field_y):
+    c3result = defaultdict(list)
+    for row in result:
+        c3result[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')
+
+    result = select_sensordata(sensor_id, sensor_type, begin, end, mode)
+
+    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')
+
+    result = select_openweatherdata(cityid, begin, end, mode)
+
+    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"""
+    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 = sensordata(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 = 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")
-def data():
-    data = {
-        'water_temperature': [20, 19, 20, 21, 20],
-        'water_temperature_x': ['2018-05-20', '2018-05-21', '2018-05-22', '2018-05-23', '2018-05-24'],
-        'air_temperature': [27, 32, 26, 29, 30],
-        'air_temperature_x': ['2018-05-21', '2018-05-22', '2018-05-23', '2018-05-24', '2018-05-25'],
-        }
-    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 hello():
-    return render_template('seepark_web.html')
+def index():
+    airvalue, airtime     = currentairtemperature(cityid)
+    watervalue, watertime = currentwatertemperature(mainsensor)
 
+    return render_template(
+        'seepark_web.html',
+        apikey=apikey,
+        watervalue=watervalue,
+        watertime=watertime,
+        airvalue=airvalue,
+        airtime=airtime,
+    )