replace 1 chart+buttons with 4 charts

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

diff --git a/web/seepark_web.py b/web/seepark_web.py
index 76a5b15d040dd97548c9dc56eadc6fbd878ab953..9ad59f124d3a78f18b81f49bf43f17885cd958ef 100644 (file)
--- 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()
@@ -31,6 +35,65 @@ 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 = dict()
+        for row in result:
+            if not row['sensor_id'] in c3result:
+                c3result[row['sensor_id']] = list()
+            c3result[row['sensor_id']].append(row['value'])
+            if not row['sensor_id'] + '_x' in c3result:
+                c3result[row['sensor_id'] + '_x'] = list()
+            dt = row['timestamp'].strftime('%Y-%m-%d %H:%M:%S')
+            c3result[row['sensor_id'] + '_x'].append(dt)
+        result = c3result
+    return result
+
+
 @app.route('/api/<version>/sensors/')
 def sensors(version):
     """List all sensors found in the database"""
@@ -41,14 +104,32 @@ def sensors(version):
         return jsonify(result)
 
 
-@app.route('/api/<version>/sensor/<sensor_id>')
-def sensor(version, sensor_id):
-    """Return all sensor data"""
-    engine = open_engine(config)
-    with engine.connect() as conn:
-        cursor = conn.execute('select * from sensors where sensor_id=%s order by id', sensor_id)
-        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)
+    format=<default|c3>, optional. return result as returned by sqlalchemy (default) or formatted for c3.js
+    """
+    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})