Use defaultdict to simplify code.
[chrisu/seepark.git] / web / seepark_web.py
index 596d4823410fbec7c435850ae7599f4d5da29dab..95c3f9dea734df366631f66bc8d3f1b12eb2aa01 100644 (file)
@@ -3,9 +3,15 @@ import datetime
 import time
 import configparser
 import os
+import sys
+from collections import defaultdict
 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 +30,7 @@ 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):
@@ -35,6 +42,78 @@ def open_engine(config):
     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
+
+    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):
+    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']
+
+
 @app.route('/api/<version>/sensors/')
 def sensors(version):
     """List all sensors found in the database"""
@@ -45,28 +124,32 @@ def sensors(version):
         return jsonify(result)
 
 
-@app.route('/api/<version>/sensor/<sensor_id>')
-def sensor(version, sensor_id):
-    """Return all sensor data
+@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
     """
-    engine = open_engine(config)
-    with engine.connect() as conn:
-        where = ['sensor_id=%s']
-        sql_args = [sensor_id]
-        if 'begin' in request.args:
-            where.append('timestamp>=%s')
-            sql_args.append(request.args.get('begin', None, parse_datetime))
-        if 'end' in request.args:
-            where.append('timestamp<=%s')
-            sql_args.append(request.args.get('end', None, parse_datetime))
-        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]
-        return jsonify(result)
+    result = select_sensordata('sensor_id=%s', 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('value_type=%s', sensor_type)
+    return jsonify(result)
 
 
 @app.route('/data/', defaults={'timespan': 1})
@@ -101,5 +184,14 @@ def data(timespan):
 
 @app.route("/")
 def index():
-    return render_template('seepark_web.html', apikey=apikey)
-
+    airvalue, airtime     = currentairtemperature(apikey, cityid)
+    watervalue, watertime = currentwatertemperature('0316a21383ff') # config? mainwatertemp?
+
+    return render_template(
+        'seepark_web.html',
+        apikey=apikey,
+        watervalue=watervalue,
+        watertime=watertime,
+        airvalue=airvalue,
+        airtime=airtime,
+    )