147 lines
4.3 KiB
Python
147 lines
4.3 KiB
Python
#!/bin/env python3
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import os
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import requests
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import pytz
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from datetime import datetime, timedelta
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from PIL import Image
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from PIL import ImageFont
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from PIL import ImageDraw
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from io import BytesIO
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from geopy.geocoders import Nominatim
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FONT_SIZE = 40
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FONT_SIZE_SMALL = 20
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TEXT_COLOR = (255, 255, 255, 255)
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def invert_back_white(img):
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pixels = img.load()
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for y in range(img.size[1]):
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for x in range(img.size[0]):
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r, g, b, _ = pixels[x, y]
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if abs(r - g) < 5 and abs(r - g) < 5 and abs(b - g) < 5:
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pixels[x, y] = (255 - r, 255 - g, 255 - b, 255)
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def scale_to_height(img, new_height):
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width, height = img.size
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new_width = int(new_height * width / height)
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return img.resize((new_width, new_height))
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def scale_to_width(img, new_width):
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width, height = img.size
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new_height = int(new_width * height / width)
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return img.resize((new_width, new_height))
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def main():
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now = datetime.now(pytz.utc)
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earlier = now - timedelta(hours=1)
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params = {
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'start': earlier.isoformat(),
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'end': now.isoformat(),
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'status': 'good',
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}
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resp = requests.get('https://network.satnogs.org/api/observations',
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params=params)
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obs = resp.json()
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obs = reversed(sorted(obs, key=lambda x: x['end']))
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for ob in obs:
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if ob['waterfall'] is not None:
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break
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if ob['waterfall'] is None:
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print("No observations with waterfall found")
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return
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resp = requests.get('https://db.satnogs.org/api/satellites/%s/' %
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ob['norad_cat_id'])
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sat_name = resp.json()['name']
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sat_img_url = None
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if 'image' in resp.json().keys():
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sat_img_url = "https://db-satnogs.freetls.fastly.net/media/%s" % (
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resp.json()['image'])
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geolocator = Nominatim(
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user_agent=
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"satnogs-demo-display - https://forgejo.zenerdio.de/sebastian/satnogs-demo-display"
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)
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mode_desc = ob['transmitter_mode']
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frequency = ob['observation_frequency'] / 1_000_000
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coord = "%f, %f" % (ob['station_lat'], ob['station_lng'])
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address = geolocator.reverse(coord, exactly_one=True,
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language="en").raw['address']
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city = address.get('city', '')
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country = address.get('country', '')
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station_location = ""
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if city != "":
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station_location += "near " + city + " "
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if country != "":
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station_location += "in " + country
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resp = requests.get(ob['waterfall'])
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waterfall = Image.open(BytesIO(resp.content)).convert('RGBA')
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invert_back_white(waterfall)
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waterfall = scale_to_height(waterfall, 1024)
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water_width, _ = waterfall.size
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logo = Image.open("satnogs-logo.png").convert('RGBA')
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logo_w, logo_h = logo.size
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invert_back_white(logo)
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sat_img = None
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if sat_img_url is not None:
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resp = requests.get(sat_img_url)
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sat_img_aplha = Image.open(BytesIO(resp.content)).convert('RGBA')
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alpha_chan = sat_img_aplha.convert('RGBA').split()[-1]
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sat_img = Image.new("RGBA", sat_img_aplha.size, (255, 255, 255, 255))
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sat_img.paste(sat_img_aplha, mask=alpha_chan)
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sat_img_width, sat_img_height = sat_img.size
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if sat_img_width > sat_img_height:
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sat_img = scale_to_width(sat_img, 500)
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else:
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sat_img = scale_to_height(sat_img, 500)
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img = Image.new('RGBA', (1280, 1024))
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draw = ImageDraw.Draw(img)
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draw.rectangle((0, 0, 1280, 1024), fill=(0, 0, 0, 255))
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station_name = ob['station_name']
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if len(station_name) > 20:
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station_name = station_name[:20] + "..."
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infos = "Satellite: %s\nStation: %s\n%s\nMode: %s\nFrequency: %f MHz\nStart: %s\nEnd: %s" % (
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sat_name, station_name, station_location, mode_desc, frequency,
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ob['start'], ob['end'])
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font = ImageFont.truetype("Montserrat-Regular.otf", FONT_SIZE)
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draw.text((water_width + 100, logo_h + 50), infos, TEXT_COLOR, font=font)
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img.paste(waterfall, (0, 0))
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img.paste(logo, (water_width + 100, 20))
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if sat_img != None:
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img.paste(sat_img, (water_width + 100, 480))
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font = ImageFont.truetype("Montserrat-Regular.otf", FONT_SIZE_SMALL)
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draw.text((950, 1000), "Geocoding by Nominatim/OSM", TEXT_COLOR, font=font)
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img.save('waterfall_tmp.png')
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os.rename('waterfall_tmp.png', 'waterfall.png')
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if __name__ == '__main__':
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main()
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