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#!/bin/bash
set -e
[ -n "$DEBUG" ] && set -x
print_gateway_uri=
print_time_diff=
print_json=
while getopts djuh opt; do
case "$opt" in
d) print_time_diff=1 ;;
j) print_json=1 ;;
u) print_gateway_uri=1 ;;
h | ?)
printf "usage: hspl [options]\n"
printf "\n"
printf "supported hotspot vendors:\n"
printf " hotsplots.de (Espresso House Berlin)\n"
printf " pbspot (CoffeeFellows Berlin)\n"
printf "\n"
printf "options:\n"
printf " -d print time until expiry in seconds\n"
printf " -j output json\n"
printf " -u print gateway address\n"
printf "\n"
exit 2
;;
esac
done
shift $((OPTIND - 1))
if=wlan0
gateway=$(ip route show dev "$if" | awk '/default via/{print $3}')
if [ -n "$print_gateway_uri" ]; then
echo "$gateway"
exit 0
fi
html=$(curl -Ls --interface "$if" "$gateway")
t=
tx=
rx=
vendor=
# hotspot vendor implementations go here:
if grep -q pbspot <<<"$html"; then
vendor=pbspot
t=$(grep -i 'expires' <<<"$html" | awk -F 'td>' '{print $4}' | tr -d '</' | tr -d ':' | sed -e 's,s, seconds,' -e 's,m, minutes,')
tx=$(grep -i 'transmitted' <<<"$html" | awk -F 'td>' '{print $4}' | tr -d '</')
rx=$(grep -i 'received' <<<"$html" | awk -F 'td>' '{print $4}' | tr -d '</')
fi
if grep -q hotsplots <<<"$html"; then
vendor=hotsplots
html=$(sed 's,\/tr>,\/tr>\n,g' <<<"$html")
t=$(grep -i 'verbleibende zeit' <<<"$html" | awk -F 'td>' '{print $3}' | tr -d '</' | sed -e 's, ,,' -e 's,h, hours,' -e 's,min, minutes,' -e 's,sec, seconds,')
tx=$(grep -i 'übertragene daten' <<<"$html" | awk -F 'td>' '{print $3}' | tr -d '</' | sed -e 's, ,,' -e 's, (.*),,')
rx="-"
fi
# end of hotspot vendor implementations
# no hotspot or unimplemented vendor
if [ -z "$t" ]; then
exit 1
fi
expiry_time=$(date --date "now + $t" +%s)
remaining=$(((expiry_time - $(date +%s))))
if [ -n "$print_time_diff" ]; then
echo "$remaining"
exit 0
fi
# format remaining time like: 5h30m or 10s
remaining=$(awk '{
s=$0
h=(s/60/60);
if(h>1){ printf "%dh", h }
m=(s/60%60)
if(m>1){ printf "%dm", m }
if(h<1 && m<1){ printf "%ds", $0 }
}' <<<"$remaining")
if [ -n "$print_json" ]; then
jq -n --args '{
remaining:$ARGS.positional[0],
tx:$ARGS.positional[1],
rx:$ARGS.positional[2],
t:$ARGS.positional[3],
vendor:$ARGS.positional[4]
}' "$remaining" "$tx" "$rx" "$t" "$vendor"
else
echo "$remaining"
echo "TX:" "$tx"
echo "RX:" "$rx"
fi
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