polybar: display current weather

bin/polybar-weather

@@ -0,0 +1,168 @@
+#!/usr/bin/env python3
+
+"""Get current weather condition and forecast for Polybar."""
+
+import requests
+import logging
+import argparse
+import sys
+import os
+import subprocess
+from systemd import journal
+
+logger = logging.getLogger("polybar-weather")
+
+
+def get_location():
+    """Return current location as latitude/longitude tuple."""
+    logger.debug("query ip-api.com for location")
+    r = requests.get("http://ip-api.com/json")
+    r.raise_for_status()
+    data = r.json()
+    logger.debug("current location data: %s", data)
+    logger.info(f'current location is {data["city"]}, {data["country"]}')
+    return (data["lat"], data["lon"])
+
+
+def get_weather(apikey, latitude, longitude, endpoint):
+    """Return current weather data from openweathermap."""
+    logger.debug("query openweathermap for %s, %s", latitude, longitude)
+    r = requests.get(
+        f"https://api.openweathermap.org/data/2.5/{endpoint}",
+        params={
+            "appid": apikey,
+            "lat": latitude,
+            "lon": longitude,
+            "units": "metric",
+            "cnt": 3,
+        },
+    )
+    r.raise_for_status()
+    data = r.json()
+    logger.debug("%s data: %s", endpoint, data)
+    return data
+
+
+def format_weather(data):
+    """Translate OWM icon to WeatherIcons."""
+    icon = data["weather"][0]["icon"]
+    temperature = data["main"]["temp"]
+    icon = {
+        "01d": "\uf00d",  # Clear sky - day
+        "01n": "\uf02e",  # Clear sky - night
+        "02d": "\uf002",  # Few clouds (11-25%) - day
+        "02n": "\uf086",  # Few clouds (11-25%) - night
+        "03d": "\uf041",  # Scattered clouds (25-50%) - day/night
+        "03n": "\uf041",  # Scattered clouds (25-50%) - day/night
+        "04d": "\uf013",  # Broken / Overcast clouds (51-84% / 85-100%) - day/night
+        "04n": "\uf013",  # Broken / Overcast clouds (51-84% / 85-100%) - day/night
+        "09d": "\uf018",  # Shower rain - day
+        "09n": "\uf018",  # Shower rain - night
+        "10d": "\uf008",  # Moderate / heavy rain - day
+        "10n": "\uf036",  # Moderate / heavy rain - night
+        "11d": "\uf005",  # Thunderstorm - day
+        "11n": "\uf025",  # Thunderstorm - night
+        "13d": "\uf00a",  # Snow - day
+        "13n": "\uf02a",  # Snow - night
+        "50d": "\uf003",  # Fog - day
+        "50n": "\uf04a",  # Fog - night
+    }.get(icon, "\uf075")
+    return "".join(
+        [
+            "%{Tx}",
+            icon,
+            "%{T-} ",
+            str(int(round(temperature))),
+            "°C",
+        ]
+    )
+
+
+def update_status(status, output):
+    """Update current status."""
+    # Write it to file
+    with open(output, "w") as f:
+        f.write(status)
+
+    # Send it to polybar
+    subprocess.run(["polybar-msg", "action", f"#weather.send.{status}"], check=True)
+
+
+if __name__ == "__main__":
+    # Parse
+    description = sys.modules[__name__].__doc__
+    parser = argparse.ArgumentParser(description=description)
+    parser.add_argument(
+        "--debug",
+        "-d",
+        action="store_true",
+        default=False,
+        help="enable debugging",
+    )
+    parser.add_argument(
+        "--owm-api-key",
+        default=os.environ.get("OWM_API_KEY"),
+        help="OpenWeatherMap API key",
+    )
+    parser.add_argument("--font", default=4, type=int, help="Weather Icons 1-index")
+    parser.add_argument(
+        "--output",
+        default=f"{os.environ['XDG_RUNTIME_DIR']}/i3/weather.txt",
+        help="Output destination",
+    )
+    parser.add_argument(
+        "--timeout",
+        default=30,
+        type=int,
+        help="Wait up to TIMEOUT minutes to be online",
+    )
+    options = parser.parse_args()
+
+    # Logging
+    root = logging.getLogger("")
+    root.setLevel(logging.WARNING)
+    logger.setLevel(options.debug and logging.DEBUG or logging.INFO)
+    if sys.stderr.isatty():
+        ch = logging.StreamHandler()
+        ch.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))
+        root.addHandler(ch)
+    else:
+        root.addHandler(journal.JournalHandler(SYSLOG_IDENTIFIER=logger.name))
+
+    try:
+        # Wait to be online
+        logger.debug("check if we are online")
+        if subprocess.run(["nm-online", "-s", "-q", "-t", "5"]).returncode != 0:
+            logger.info("not online, waiting")
+            update_status("", options.output)
+            if (
+                subprocess.run(
+                    ["nm-online", "-s", "-q", "-t", str(options.timeout * 60)]
+                ).returncode
+                != 0
+            ):
+                logger.warning("not online, exiting")
+                sys.exit(1)
+
+        # Grab information. We only use forecast weather, otherwise,
+        # we may get something "late".
+        location = get_location()
+        forecast_weather = get_weather(options.owm_api_key, *location, "forecast")
+        description = forecast_weather["list"][0]["weather"][0]["description"]
+        logger.info(f"current weather: {description}")
+
+        # Format output
+        output = "{} {} {}".format(
+            format_weather(forecast_weather["list"][0]),
+            format_weather(forecast_weather["list"][1]),
+            format_weather(forecast_weather["list"][2]),
+        )
+        output = output.replace("%{Tx}", "%%{T%d}" % options.font)
+        logger.debug("output: %s", output)
+
+        update_status(output, options.output)
+
+    except Exception as e:
+        logger.exception("%s", e)
+        sys.exit(1)
+    sys.exit(0)

dotfiles/polybar.conf

@@ -29,9 +29,10 @@ foreground = ${colors.foreground}
 font-0 = Iosevka:style=Regular:size=10;2
 font-1 = Font Awesome 6 Pro:style=Solid:size=10;2
 font-2 = Font Awesome 6 Brands:style=Regular:size=10;2
+font-3 = Weather Icons:style=Regular:size=10;2
 
 modules-left = i3
-modules-center = date
+modules-center = date weather
 
 [bar/alone]
 inherit = bar/common
@@ -43,6 +44,7 @@ modules-right = cpu memory brightness battery bluetooth network disk dunst pulse
 
 [bar/secondary]
 inherit = bar/common
+modules-center = date
 modules-right = pulseaudio
 
 [module/i3]
@@ -106,6 +108,12 @@ type = custom/ipc
 hook-0 = cat $XDG_RUNTIME_DIR/i3/bluetooth.txt 2> /dev/null
 initial = 1
 
+[module/weather]
+type = custom/ipc
+hook-0 = cat $XDG_RUNTIME_DIR/i3/weather.txt 2> /dev/null
+initial = 1
+click-left = xdg-open https://www.meteoblue.com/en/weather/week
+
 [module/dunst]
 type = custom/ipc
 hook-0 = cat $XDG_RUNTIME_DIR/i3/dunst.txt 2> /dev/null

dotfiles/systemd/i3-session.target

@@ -3,6 +3,8 @@ Description=i3 session
 BindsTo=graphical-session.target
 Wants=wallpaper.service
 Wants=wallpaper.timer
+Wants=weather.service
+Wants=weather.timer
 Wants=polybar.service
 Wants=i3-companion.service
 Wants=misc-x.service

dotfiles/systemd/weather.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Build and display wallpaper
+PartOf=graphical-session.target
+After=polybar.service
+
+[Service]
+Environment=OWM_API_KEY=81687c78e0376836871a6cb9fc347249
+ExecStart=/usr/bin/mkdir -p %h/.cache/i3
+ExecStart=%h/.config/i3/bin/polybar-weather
+Type=oneshot
+RemainAfterExit=false

dotfiles/systemd/weather.timer

@@ -0,0 +1,7 @@
+[Unit]
+Description=Weather update
+PartOf=graphical-session.target
+
+[Timer]
+OnUnitActiveSec=1h
+OnClockChange=true