wrap csv filenames in os.path.expanduser()

[chrisu/seepark.git] / web / seepark_web.py

diff --git a/web/seepark_web.py b/web/seepark_web.py
index 0a1aa34a7f502fa28e4eb73dde60074dc173daa0..68929fc8154afdaf09b44c25c4d4b70de4278f63 100644 (file)
--- a/web/seepark_web.py
+++ b/web/seepark_web.py
@@ -1,13 +1,127 @@
-from flask import Flask, render_template, jsonify
 from random import uniform
+import datetime
 import time
+import configparser
+import os
+from flask import Flask, render_template, jsonify, request
+import flask.json
+from sqlalchemy import create_engine
+
+
+class JSONEncoder(flask.json.JSONEncoder):
+    def default(self, object):
+        if isinstance(object, datetime.datetime):
+            return object.isoformat()
+        return super().default(object)
+
+
+def parse_datetime(date_str):
+    return datetime.datetime.strptime(date_str, '%Y-%m-%dT%H:%M:%S')
+
+
 app = Flask(__name__)
+app.json_encoder = JSONEncoder
+config = configparser.ConfigParser()
+config.read(os.environ['SEEPARKINI'])
+apikey = config.get('openweathermap', 'apikey')
+
+
+def open_engine(config):
+    user = config.get('database', 'user')
+    pwd = config.get('database', 'password')
+    host = config.get('database', 'hostname')
+    db = config.get('database', 'database')
+    engine = create_engine('mysql+mysqldb://{}:{}@{}/{}'.format(user, pwd, host, db), echo=False)
+    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
+
+    return result
+
+
+@app.route('/api/<version>/sensors/')
+def sensors(version):
+    """List all sensors found in the database"""
+    engine = open_engine(config)
+    with engine.connect() as conn:
+        cursor = conn.execute('select distinct sensor_id, sensor_name, value_type from sensors')
+        result = [dict(row) for row in cursor]
+        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)
+    """
+    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)
+    """
+    result = select_sensordata('value_type=%s', sensor_type)
+    return jsonify(result)
 
-@app.route("/data")
-def data():
 
-    timespan = 1                             # days
-    granularity = 5 * timespan               # (every) minute(s)
+@app.route('/data/', defaults={'timespan': 1})
+@app.route("/data/<int:timespan>", methods=['GET'])
+def data(timespan):
+    granularity = 5 * timespan               # (every) minute(s) per day
     samples = 60/granularity * 24 * timespan # per hour over whole timespan
     s4m   = []
     s4m_x = []
@@ -36,5 +150,5 @@ def data():
 
 @app.route("/")
 def index():
-    return render_template('seepark_web.html')
+    return render_template('seepark_web.html', apikey=apikey)