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# snag
# Matt Kohls
# (c) 2023
import functools
from flask import (
Blueprint, flash, g, redirect, render_template, request, session, url_for, Response
)
from werkzeug.exceptions import abort
from datetime import datetime, timedelta
from dateutil import parser
from io import BytesIO
from matplotlib.figure import Figure
import matplotlib.dates as mdates
from snag.db import get_db
bp = Blueprint('graph', __name__, url_prefix='/graph')
def get_table(env):
if env == 'outdoor':
return 'env_outdoor'
elif env == 'indoor':
return 'env_indoor'
elif env == 'enclosed':
return 'env_enclosed'
else:
return None
def get_current(requestArgs, columns, table):
# start and end should be formatted YYYYMMDDHHMMSS
start = requestArgs.get('start')
end = requestArgs.get('end')
env = requestArgs.get('type')
deviceId = request.args.get('deviceId')
# Sets default dates of information to be fetched, starttime will default to one day behind endtime, which defaults to now
if end is None:
endtime = datetime.now()
else:
endtime = datetime.strptime(end, "%Y%m%d%H%M%S")
if start is None:
starttime = endtime - timedelta(days=1)
else:
starttime = datetime.strptime(start, "%Y%m%d%H%M%S")
if endtime < starttime:
temp = starttime
starttime = endtime
endtime = temp
if deviceId is None:
deviceId = 1
db = get_db()
if table is not None:
sql = (f"SELECT {columns} "
f"FROM {table} "
"WHERE (date BETWEEN ? AND ?) AND deviceId = ?")
subset = db.execute(sql, [starttime, endtime, deviceId])
else:
subset = None
return subset
def single_line_graph(xData, yData, xLabel, yLabel, title, lineColor):
fig = Figure()
ax = fig.subplots()
locator = mdates.AutoDateLocator(minticks=3, maxticks=7)
formatter = mdates.ConciseDateFormatter(locator)
ax.xaxis.set_major_locator(locator)
ax.xaxis.set_major_formatter(formatter)
ax.plot(xData, yData, color=lineColor)
ax.set_xlabel(xLabel)
ax.set_ylabel(yLabel)
ax.set_title(title)
buf = BytesIO()
fig.savefig(buf, format="png")
return buf
def double_line_graph(xData, yData1, yData2, xLabel, yLabel1, yLabel2, title, line1Color, line2Color, line1Label, line2Label):
fig = Figure()
ax = fig.subplots()
bx = ax.twinx()
locator = mdates.AutoDateLocator(minticks=3, maxticks=7)
formatter = mdates.ConciseDateFormatter(locator)
ax.xaxis.set_major_locator(locator)
ax.xaxis.set_major_formatter(formatter)
bx.xaxis.set_major_locator(locator)
bx.xaxis.set_major_formatter(formatter)
aline, = ax.plot(xData, yData1, color=line1Color, label=line1Label)
ax.set_xlabel(xLabel)
ax.set_ylabel(yLabel1)
ax.set_title(title)
bline, = bx.plot(xData, yData2, color=line2Color, label=line2Label)
bx.set_ylabel(yLabel2)
lines = [aline, bline]
ax.legend(lines, [l.get_label() for l in lines])
buf = BytesIO()
fig.savefig(buf, format="png")
return buf
def double_y_graph(xData, yData1, yData2, xLabel, yLabel1, yLabel2, title, line1Color):
fig = Figure()
ax = fig.subplots()
bx = ax.twinx()
locator = mdates.AutoDateLocator(minticks=3, maxticks=7)
formatter = mdates.ConciseDateFormatter(locator)
ax.xaxis.set_major_locator(locator)
ax.xaxis.set_major_formatter(formatter)
bx.xaxis.set_major_locator(locator)
bx.xaxis.set_major_formatter(formatter)
ax.plot(xData, yData1, color=line1Color)
ax.set_xlabel(xLabel)
ax.set_ylabel(yLabel1)
ax.set_title(title)
bx.plot(xData, yData2, visible=False)
bx.set_ylabel(yLabel2)
buf = BytesIO()
fig.savefig(buf, format="png")
return buf
@bp.route('/temperature.png', methods=['GET'])
def draw_t_graph():
cur = get_current(request.args, "date, temperature", get_table(request.args['type']))
if cur is None:
abort(404, "Data not found")
data = cur.fetchall()
dates = []
tempsC = []
tempsF = []
if data is None:
abort(404, "Data not found")
for row in data:
if isinstance(row['date'], str):
dates.append(parser.parse(row['date']))
else:
dates.append(row['date'])
tempsC.append(row['temperature'])
tempsF.append(row['temperature'] * 1.8 + 32)
buf = double_y_graph(dates, tempsC, tempsF, "Timestamps", "Celsius", "Fahrenheit", "Temperature", "C1")
return Response(buf.getvalue(), mimetype='image/png')
@bp.route('/humidity.png', methods=['GET'])
def draw_h_graph():
cur = get_current(request.args, "date, humidity", get_table(request.args['type']))
if cur is None:
abort(404, "Data not found")
data = cur.fetchall()
dates = []
humidities = []
if data is None:
abort(404, "Data not found")
for row in data:
if isinstance(row['date'], str):
dates.append(parser.parse(row['date']))
else:
dates.append(row['date'])
humidities.append(row['humidity'])
buf = single_line_graph(dates, humidities, "Timestamps", "Percent", "Relative Humidity", "C0")
return Response(buf.getvalue(), mimetype='image/png')
@bp.route('/humidity-temperature.png', methods=['GET'])
def draw_ht_graph():
cur = get_current(request.args, "date, temperature, humidity", get_table(request.args['type']))
if cur is None:
abort(404, "Data not found")
data = cur.fetchall()
dates = []
humidities = []
#tempsC = []
tempsF = []
if data is None:
abort(404, "Data not found")
for row in data:
if isinstance(row['date'], str):
dates.append(parser.parse(row['date']))
else:
dates.append(row['date'])
# tempsC.append(row['temperature'])
tempsF.append(row['temperature'] * 1.8 + 32)
humidities.append(row['humidity'])
buf = double_line_graph(dates, humidities, tempsF, "Timestamps", "Percent", "Fahrenheit", "Humidity and Temperature", "C0", "C1", "Relative Humidity", "Temperature")
return Response(buf.getvalue(), mimetype='image/png')
@bp.route('/pressure.png', methods=['GET'])
def draw_p_graph():
cur = get_current(request.args, "date, pressure", get_table(request.args['type']))
if cur is None:
abort(404, "Data not found")
data = cur.fetchall()
dates = []
pressures = []
if data is None:
abort(404, "Data not found")
for row in data:
if isinstance(row['date'], str):
dates.append(parser.parse(row['date']))
else:
dates.append(row['date'])
pressures.append(row['pressure'])
buf = single_line_graph(dates, pressures, "Timestamps", "hPa", "Barometric Pressure", "C2")
return Response(buf.getvalue(), mimetype='image/png')
@bp.route('/battery.png', methods=['GET'])
def draw_b_graph():
cur = get_current(request.args, "date, batteryCharge", "device_status")
if cur is None:
abort(404, "Data not found")
data = cur.fetchall()
dates = []
batteries = []
if data is None:
abort(404, "Data not found")
for row in data:
if isinstance(row['date'], str):
dates.append(parser.parse(row['date']))
else:
dates.append(row['date'])
batteries.append(row['batteryCharge'])
buf = single_line_graph(dates, batteries, "Timestamps", "Volts", "Battery Voltage", "C3")
return Response(buf.getvalue(), mimetype='image/png')
@bp.route('/light.png', methods=['GET'])
def draw_l_graph():
env = request.args['type']
if (env is not None) and (env == 'outdoor'):
cur = get_current(request.args, "date, uv_intensity, lux", get_table(env))
if cur is None:
abort(404, "Data not found")
data = cur.fetchall()
if data is None:
abort(404, "Data not found")
dates = []
uv = []
lux = []
for row in data:
if isinstance(row['date'], str):
dates.append(parser.parse(row['date']))
else:
dates.append(row['date'])
uv.append(row['uv_intensity'])
lux.append(row['lux'])
buf = double_line_graph(dates, uv, lux, "Timestamps", "UV Index", "Lux", "UV and Light Intensity", "C4", "C5", "UV Light", "Light Intensity")
else:
cur = get_current(request.args, "date, light", get_table(env))
if cur is None:
abort(404, "Data not found")
data = cur.fetchall()
if data is None:
abort(404, "Data not found")
dates = []
light = []
for row in data:
if isinstance(row['date'], str):
dates.append(parser.parse(row['date']))
else:
dates.append(row['date'])
light.append(row['light'])
buf = single_line_graph(dates, light, "Timestamps", "Raw Light Reading", "Light Intensity", "C5")
return Response(buf.getvalue(), mimetype='image/png')
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