Display script for datex.

datex-disp.py

#!/usr/bin/python3

import os
import sys
import ephem
import datetime
import pytz
import colorlover as colours
import yaml
import math

def now(timezone_text):
    return datetime.datetime.now(pytz.timezone(timezone_text))
def altitude(latitude, longitude, time):
    place = ephem.Observer()
    place.lat=str(latitude)
    place.lon=str(longitude)
    place.date=time.strftime("%Y-%m-%d %H:%M:%S")
    return ephem.Sun(place).alt / math.pi * 180

script_dir = os.path.dirname(os.path.abspath(__file__))
timezoneList = script_dir + "/timezones.yaml"
with open(timezoneList, 'r') as configFile:
    config = yaml.load(configFile)
selectedName = os.getenv("BLOCK_INSTANCE") or 'uni'
selectedTimezone = config[selectedName]['zone_name']

if os.getenv("BLOCK_BUTTON") == '1':
    import notify2
    notify2.init("datex")
    notify2.Notification(
        "Times across the world",
        "\n".join(
            ["{}: {}".format(i, now(config[i]['zone_name']).strftime("%H:%M"))
             for i in config.keys()])).show()

# Sunrise and sunset
nowAltitude = altitude(config[selectedName]['latitude'],
                       config[selectedName]['longitude'],
                       now("UTC"))
minaltitude = -7.5
maxaltitude = 7.5

# 135, 206, 235
if nowAltitude < minaltitude: # Night time
    foreground = "FFFFFF"
    background = "222222"
elif minaltitude < nowAltitude < maxaltitude:
    # Sun is close to the horizon, time to colours.
    steps = 150
    index = math.floor((nowAltitude - minaltitude)
                       / (maxaltitude - minaltitude) * steps)
    settingp = nowAltitude > altitude(config[selectedName]['latitude'],
                                      config[selectedName]['longitude'],
                                      now("UTC") + datetime.timedelta(minutes = 3))
    setCol = ['rgb(34,34,34)',
              'rgb(175,65,14)',
              'rgb(236,203,90)',
              'rgb(114,136,124)',
              'rgb(32,82,141)',
              'rgb(135,206,235)']
    riseCol =  ['rgb(34,34,34)',
                'rgb(114,113,171)',
                'rgb(189,128,161)',
                'rgb(246,133,127)',
                'rgb(135,206,235)']
    backgroundHSL = colours.interp(setCol if settingp else riseCol, steps)[index]
    backgroundHSLnum = colours.to_numeric([backgroundHSL.replace("%", "")])[0]
    backgroundRGBnum = colours.to_numeric(colours.to_rgb([backgroundHSL]))[0]
    background = "{0[0]:02X}{0[1]:02X}{0[2]:02X}".format(
        tuple(map(math.floor, backgroundRGBnum)))
    if backgroundHSLnum[2] > 50:
        foreground = "000000"
    else:
        foreground = "FFFFFF"
else:
    foreground = "222222"
    background = "87CEEB"

# Final print
pangoFmt ='<span fgcolor="#{}" bgcolor="#{}">{}</span>'
print(pangoFmt.format(foreground, background,
                      now(selectedTimezone).strftime("%Y-%m-%d %H:%M:%S %Z")))
print(pangoFmt.format(foreground, background,
                      now(selectedTimezone).strftime("%H:%M:%S")))