From f884244feef20d1216cbbbaf123d15d9732758cb Mon Sep 17 00:00:00 2001
From: Philipp Spitzer <philipp@spitzer.priv.at>
Date: Mon, 11 Jun 2018 23:57:16 +0200
Subject: [PATCH] Add begin and end parameters to sensor endpoint.

---
 web/seepark_web.py | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/web/seepark_web.py b/web/seepark_web.py
index 76a5b15..596d482 100644
--- a/web/seepark_web.py
+++ b/web/seepark_web.py
@@ -3,7 +3,7 @@ import datetime
 import time
 import configparser
 import os
-from flask import Flask, render_template, jsonify
+from flask import Flask, render_template, jsonify, request
 import flask.json
 from sqlalchemy import create_engine
 
@@ -15,6 +15,10 @@ class JSONEncoder(flask.json.JSONEncoder):
         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()
@@ -43,10 +47,24 @@ def sensors(version):
 
 @app.route('/api/<version>/sensor/<sensor_id>')
 def sensor(version, sensor_id):
-    """Return all sensor data"""
+    """Return all sensor data
+
+    URL parameters:
+    begin=<datetime>, optional, format like "2018-05-19T21:07:53"
+    end=<datetime>, optional, format like "2018-05-19T21:07:53"
+    """
     engine = open_engine(config)
     with engine.connect() as conn:
-        cursor = conn.execute('select * from sensors where sensor_id=%s order by id', sensor_id)
+        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)
 
-- 
2.47.3