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#!/bin/sh
cachefile="$HOME/.cache/weather"
location="Saint Petersburg"
update_freq=1800
obsolete_after=10800
if [ -n "$location" ]; then
location="~${location// /+}"
fi
update_forecast() {
ping -q -c 1 1.1.1.1 >/dev/null || exit
forecast=$(curl -s wttr.in/"$location"?format=1)
if [ ${#forecast} -lt 30 ]; then
printf "%s\n" "$forecast" > "$cachefile"
fi
}
if [ -f "$cachefile" ]; then
last_modif=$(date +%s -r "$cachefile")
current_secs=$(date +%s)
elapsed=$((current_secs - last_modif))
if [ $elapsed -gt $obsolete_after ]; then
rm "$cachefile"
fi
if [ $elapsed -gt $update_freq ]; then
update_forecast
fi
else
update_forecast
fi
if [ ! -f "$cachefile" ]; then
exit
fi
cat "$cachefile"
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