X-Git-Url: https://git.toastfreeware.priv.at/chrisu/seepark.git/blobdiff_plain/c76885ae93a85e0abe3ed4362e6cf2f628a239aa..80996a20e1f1986d827c9af79aa4932fbfc29b2e:/web/seepark_web.py

diff --git a/web/seepark_web.py b/web/seepark_web.py
index e8b9da1..a6d3930 100644
--- a/web/seepark_web.py
+++ b/web/seepark_web.py
@@ -5,7 +5,7 @@ import configparser
 import os
 import sys
 from collections import defaultdict
-from flask import Flask, render_template, jsonify, request
+from flask import Flask, render_template, jsonify, request, abort, Response
 import flask.json
 from flask_sqlalchemy import SQLAlchemy, inspect
 
@@ -61,6 +61,10 @@ 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:
@@ -92,18 +96,38 @@ def select_sensordata(sensor_id, sensor_type, begin, end, mode):
             resolution = resolutions['year']
         # TODO: filter out samples from 'result'
         # something like 
-        # select mean(temperature) from sensors where ... group by mod(timestamp, resolution)
-        # func.avg(...)
-        #
-        # from https://stackoverflow.com/questions/4342370/grouping-into-interval-of-5-minutes-within-a-time-range
-        # SELECT
-        #    timestamp,  -- not sure about that
-        #        name,
-        #            count(b.name)
-        #            FROM time a, id 
-        #            WHERE …
-        #            GROUP BY 
-        #            UNIX_TIMESTAMP(timestamp) DIV 300, name
+        # 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 None and end is 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()
 
 
@@ -116,9 +140,23 @@ def convert_to_c3(result):
     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.args.get('begin', None, parse_datetime)
-    end = request.args.get('end', None, parse_datetime)
+    begin = request_arg('begin', parse_datetime)
+    end = request_arg('end', parse_datetime)
     mode = request.args.get('mode', 'full')
     format = request.args.get('format', 'default')
 
@@ -129,13 +167,22 @@ def sensordata(sensor_id=None, sensor_type=None):
     return result
 
 
-def currentairtemperature(apikey, cityid):
-    """Retruns the tuple temperature, datetime (as float, datetime) in case of success, otherwise None, None."""
-    try:
-        url, weatherdata = openweathermap_json(apikey, cityid)
-        return weatherdata['main']['temp'], datetime.datetime.fromtimestamp(weatherdata['dt'])
-    except OpenWeatherMapError:
-        return None, None
+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)
+    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):
@@ -178,6 +225,20 @@ def sensortype(version, 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('/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('/data/', defaults={'timespan': 1})
 @app.route("/data/<int:timespan>", methods=['GET'])
 def data(timespan):
@@ -210,7 +271,7 @@ def data(timespan):
 
 @app.route("/")
 def index():
-    airvalue, airtime     = currentairtemperature(apikey, cityid)
+    airvalue, airtime     = currentairtemperature(cityid)
     watervalue, watertime = currentwatertemperature(mainsensor)
 
     return render_template(