hunt for opening new seats in the train

tickets-2018-03-23.sh

#!/bin/bash

LOG=~/tmp/kov-od/03-23.txt
P_PRE=$(tac $LOG | egrep -m 1 'Плацкарт' | egrep -o '[[:digit:]]+')
K_PRE=$(tac $LOG | egrep -m 1 'Купе' | egrep -o '[[:digit:]]+')

function show-last () {
    echo "Купе: $K_PRE";
    echo "Плацкарт: $P_PRE";
    echo;
}

show-last;

while :; do
  date
  TMP=$(mktemp /tmp/$(basename $0)-$(date +%Y%m%d%H%M%S)-XXX)
  TMP2=$(mktemp /tmp/$(basename $0)-$(date +%Y%m%d%H%M%S)-2-XXX)
  wget -q -O - --post-data='from=2218020&to=2208001&date=2018-03-23&time=00%3A00&train=084%D0%9B&get_tpl=1' https://booking.uz.gov.ua/ru/mobile/train_wagons/ > $TMP
##   tee $TMP
  echo
  cat $TMP | grep -Eo '"title":"[[:alpha:]]+","letter":".","free":[[:digit:]]+,"cost":[[:digit:]]+' \
           | cut -d ',' -f 1,3,4 | grep -v 'Люкс' | tee $TMP2
  P_NOW=$(cat $TMP2 | grep 'Плацкарт' | egrep -o '"free":[[:digit:]]+' | egrep -o '[[:digit:]]+')
  P_NOW=${P_NOW:-0}
  K_NOW=$(cat $TMP2 | grep 'Купе' | egrep -o '"free":[[:digit:]]+' | egrep -o '[[:digit:]]+')
  K_NOW=${K_NOW:-0}
  if [[ $K_NOW > $K_PRE ]]; then snd-sms.sh "KOV OD 03-23 Купе: $K_NOW"; fi
  if [[ $P_NOW > $P_PRE ]]; then snd-sms.sh "KOV OD 03-23 Плацкарт: $P_NOW"; fi
  K_PRE=$K_NOW;
  P_PRE=$P_NOW;
  { date;
    show-last;
  } >> $LOG
##  if [[ $(echo $(grep -Eo 'places":[[:digit:]]+' $TMP | grep -Eo '[[:digit:]]+') | sed 's/ /+/g' | bc) -gt 1 ]]
##    then 
##      lnk=$(grep 'http:' $TMP)
##      xdg-open "$lnk"
##      alert-tickets.sh
##      exit
##    fi
  rm $TMP $TMP2
  echo
  echo Waiting 15 minutes until $(date -d '+15 min' +'%H:%M')
##  timer-back.sh $(date -d '+15 min' +'%H:%M')
  sleep 15m 
done

timer-back.sh

#!/bin/bash

## Usage: $0 "08:00"
clr_l () { echo -ne '\e[2K\r'; }
now() { date +%s; }
THEN=$(date -d "$1" +%s)
left() { date -d "1980-01-01 +$(($THEN - $(now))) sec" +%H:%M:%S; }
while [[ $THEN -gt $(now) ]]; do
  clr_l
  echo -n "$(left) left until $1"
  sleep 1
done
echo