Use openweathermap module in web app.
[chrisu/seepark.git] / web / seepark_web.py
index 68929fc8154afdaf09b44c25c4d4b70de4278f63..c0fd440d4da1e5f770c954fdb2d7c6ecc4295c29 100644 (file)
@@ -3,9 +3,14 @@ import datetime
 import time
 import configparser
 import os
+import sys
 from flask import Flask, render_template, jsonify, request
 import flask.json
 from sqlalchemy import create_engine
+import requests
+
+sys.path.append('..')
+from seeparklib.openweathermap import openweathermap_json, OpenWeatherMapError
 
 
 class JSONEncoder(flask.json.JSONEncoder):
@@ -24,6 +29,7 @@ app.json_encoder = JSONEncoder
 config = configparser.ConfigParser()
 config.read(os.environ['SEEPARKINI'])
 apikey = config.get('openweathermap', 'apikey')
+cityid = config.get('openweathermap', 'cityid')
 
 
 def open_engine(config):
@@ -54,34 +60,63 @@ def select_sensordata(initial_where, initial_sql_args):
         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
+    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:
-                # 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
-
+                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 = dict()
+        for row in result:
+            if not row['sensor_id'] in c3result:
+                c3result[row['sensor_id']] = list()
+            c3result[row['sensor_id']].append(row['value'])
+            if not row['sensor_id'] + '_x' in c3result:
+                c3result[row['sensor_id'] + '_x'] = list()
+            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):
+    engine = open_engine(config)
+    with engine.connect() as conn:
+        cursor = conn.execute('select value, timestamp from sensors where sensor_id=%s order by timestamp desc limit 1', sensorid)
+        result = [dict(row) for row in cursor]
+        return result[0]['value'], result[0]['timestamp'].strftime('%Y-%m-%d %H:%M')
+
+
 @app.route('/api/<version>/sensors/')
 def sensors(version):
     """List all sensors found in the database"""
@@ -100,6 +135,7 @@ def sensorid(version, 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)
     return jsonify(result)
@@ -113,6 +149,7 @@ def sensortype(version, sensor_type):
     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)
     return jsonify(result)
@@ -150,5 +187,16 @@ def data(timespan):
 
 @app.route("/")
 def index():
-    return render_template('seepark_web.html', apikey=apikey)
-
+    airvalue, airtime     = currentairtemperature(apikey, cityid)
+    airvalue              = "{:.1f}".format(airvalue) if isinstance(airvalue, float) else airvalue
+    watervalue, watertime = currentwatertemperature('0316a21383ff') # config? mainwatertemp?
+    watervalue            = "{:.1f}".format(watervalue) if isinstance(watervalue, float) else watervalue
+
+    return render_template(
+        'seepark_web.html',
+        apikey=apikey,
+        watervalue=watervalue,
+        watertime=watertime,
+        airvalue=airvalue,
+        airtime=airtime,
+    )