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# -*- coding: utf-8 -*-
# vim: autoindent tabstop=4 shiftwidth=4 expandtab softtabstop=4 filetype=python
import bottle
import sqlalchemy
from sqlalchemy import create_engine, select
from sqlalchemy.orm import sessionmaker
from sqlalchemy.sql import text
from sqlalchemy.ext.sqlsoup import SqlSoup
from sqlalchemy import or_, and_, desc
from ebus.sql import model
import os
import json
import datetime
import time
app = bottle.Bottle("ebus")
bottle.debug()
engine = create_engine("postgresql:///ebus", echo=True)
Session = sessionmaker()
Session.configure(bind=engine)
soup = SqlSoup(engine)
@app.route('/')
def index_file():
return static_files("index.html")
@app.route('/static/:filename')
def static_files(filename):
return bottle.static_file(filename, root=os.path.join(os.path.dirname(__file__),"static"))
@app.route('/sensor/:name')
def sensor_data(name):
try:
# get sensor_id for name
sensor_id = soup.sensor.filter(soup.sensor.name == name).one().id
# select data from cache-view
conn = soup.connection()
s = text("""SELECT timestamp, COALESCE(value_int, value_float) as "value_real"
FROM value
WHERE sensor_id = :sensor_id
ORDER BY timestamp DESC
LIMIT 1""")
value = conn.execute(s, sensor_id=sensor_id).first()
return {'sensor':name,'data':[maketime(value.timestamp), float(value.value_real)], 'error':None}
except Exception,e:
return {'sensor':name,'data':None, 'error':str(e)}
@app.route('/sensor/:name/:startdate/:enddate')
def sensor_data_fromto(name,startdate,enddate):
try:
interval = float(enddate) - float(startdate)
if interval <= 0: raise Exception("Invalid interval")
if interval >= 14 * 24 * 60 * 60: raise Exception("interval too big")
modulo = interval / 500 #500 values
startdate = datetime.datetime.fromtimestamp(float(startdate))
enddate = datetime.datetime.fromtimestamp(float(enddate))
sensor_id = soup.sensor.filter(soup.sensor.name == name).one().id
conn = soup.connection()
s = text("""
SELECT to_timestamp( extract(epoch from timestamp)::int - extract(epoch from timestamp)::int % :modulo ) "round_timestamp",
AVG(COALESCE(value_int,value_float)) "value_real"
FROM value
WHERE timestamp > :startdate
AND timestamp < :enddate
AND sensor_id = :sensor_id
GROUP BY "round_timestamp"
ORDER BY "round_timestamp"
""")
values = conn.execute(s, sensor_id=sensor_id, startdate=startdate, enddate=enddate, modulo=modulo).fetchall()
values = map(lambda row: (maketime(row.round_timestamp),
row.value_real),
values)
print "Sent", len(values)
return {'sensor':name,'data':values, 'error':None}
except Exception,e:
return {'sensor':name, 'data':None, 'error':str(e)}
# rechnet zeit so um wie Javascript
# teil es braucht XXX
def maketime(datetime):
return (time.mktime(datetime.timetuple())+time.altzone*-1)*1000
@app.route('/sensor_cached/:name/:timestamp_from')
def sensor_data_cached_fromto(name, timestamp_from):
try:
timestamp_from = datetime.datetime.fromtimestamp(float(timestamp_from))
# get sensor_id for name
sensor_id = soup.sensor.filter(soup.sensor.name == name).one().id
# select data from cache-view
conn = soup.connection()
s = text("""SELECT timestamp, value_real AS "value_real"
FROM vi_value_cache
WHERE timestamp >= :timestamp_from
AND sensor_id = :sensor_id
ORDER BY timestamp""")
values = conn.execute(s, timestamp_from=timestamp_from, sensor_id=sensor_id).fetchall()
values = map(lambda row: (maketime(row.timestamp),
row.value_real.__float__()),
values)
return {'sensor':name,'data':values, 'error':None}
except Exception,e:
return {'sensor':name, 'data':None, 'error':str(e)}
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