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July 24, 2018 08:59
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Script to download the latest DSCOVR image. Can probably be easily combined with https://github.com/boramalper/himawaripy for use with background-setters other than nitrogen.
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#!/usr/bin/env python3 | |
# http://epic.gsfc.nasa.gov/ | |
# https://gist.github.com/IJMacD/c4cd803ab5b09eaa53dd | |
# https://github.com/boramalper/himawaripy | |
from io import BytesIO | |
from json import loads | |
from datetime import datetime, timedelta | |
from time import strptime | |
from subprocess import call | |
from os import makedirs | |
from os.path import expanduser, split | |
from urllib.request import urlopen | |
from PIL import Image, ImageDraw, ImageFont | |
# Path to the output file. | |
OUTPUT = expanduser("~/.config/nitrogen/earth-image") | |
# URL with JSON info about images. Expects date=YYYY-MM-DD. | |
JSON_URL = 'http://epic.gsfc.nasa.gov/api/images.php?date={:04d}-{:02d}-{:02d}' | |
# URL to download images. Expects an image name parsed out of the JSON. | |
IMG_URL = 'http://epic.gsfc.nasa.gov/epic-archive/jpg/{}.jpg' | |
# The format of time strings in the JSON data (for strptime). | |
TIME_FORMAT = '%Y-%m-%d %H:%M:%S' | |
# The font to use to write the date. | |
FONT_FILE = '/usr/share/fonts/TTF/Hack-Regular.ttf' | |
# The font size to use to write the date. | |
FONT_SIZE = 30 | |
def main(): | |
# Get the JSON data. Work backward in time if there's nothing yet for today. | |
print('Getting JSON data...') | |
dt = 0 | |
json = [] | |
while len(json) < 1: | |
urldate = datetime.now() + timedelta(days = dt) | |
with urlopen(JSON_URL.format(urldate.year, urldate.month, urldate.day)) as data: | |
json = loads(data.read().decode('utf-8')) | |
dt -= 1 | |
# Pick the most recent image. | |
print('Parsing JSON...') | |
newest_img = json[0] | |
for img in json: | |
if strptime(img['date'], TIME_FORMAT) > strptime(newest_img['date'], TIME_FORMAT): | |
newest_img = img | |
print('Latest image is from {}.'.format(newest_img['date'])) | |
# Download the image file. | |
print('Downloading image...') | |
with urlopen(IMG_URL.format(newest_img['image'])) as imagedata: | |
bg = Image.open(BytesIO(imagedata.read())) | |
# Add text with the current date and save. | |
print('Formatting image...') | |
w, h = bg.size | |
draw = ImageDraw.Draw(bg) | |
font = ImageFont.truetype(FONT_FILE, size = FONT_SIZE) | |
draw.text((0, h - FONT_SIZE * 2), newest_img['date'], font = font) | |
print('Saving image...') | |
makedirs(split(OUTPUT)[0], exist_ok=True) | |
bg.save(OUTPUT, 'png') | |
# Set the background. | |
print('Setting background...') | |
call(["nitrogen", "--restore"]) | |
print("Done!") | |
if __name__ == "__main__": | |
main() |
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