GetPrices

#! /bin/sh

DEP=XXX
DES=XXX

DD=D/M/YYYY
DT=HH:MM
DP=XXX.XX

RD=D/M/YYYY
RT=HH:MM
RP=XXX.XX

PAS=X

URL="http://www.easyjet.com/links.mvc?dep=$DEP&dest=$DES&dd=$DD&rd=$RD&apax=$PAS"

curl -s -L -c cookies.txt -o prices.html $URL

rm cookies.txt

DNOWP=$(sed -n "
/ \{12\}£/{
 N
 N
 N
 N
 N
 /30\/06\/2015 $DT/{
  s/<\/s.*//
  s/<\/div><span>//
  s/<div>//
  s/ \{12\}£//
  p
 }
}
" prices.html)

RNOWP=$(sed -n "
/ \{12\}£/{
 N
 N
 N
 N
 N
 /10\/07\/2015 $RT/{
  s/<\/s.*//
  s/<\/div><span>//
  s/<div>//
  s/ \{12\}£//
  p
 }
}
" prices.html)

rm prices.html

DDIFF=$(echo "$DP - $DNOWP" | bc)
RDIFF=$(echo "$RP - $RNOWP" | bc)

if [[ $(echo "if ($DDIFF > 0) 1 else 0" | bc) -eq 1 ]]; then
  MESSAGE="Departure flight is £$DDIFF cheaper."
fi

if [[ $(echo "if ($RDIFF > 0) 1 else 0" | bc) -eq 1 ]]; then
  MESSAGE="$MESSAGE Return flight is £$RDIFF cheaper."
fi

if [[ $MESSAGE ]]; then
  curl --data "apikey=XXXXX&application=EJCheck&event=Price%20Is%20Cheaper!&description=$MESSAGE" https://api.prowlapp.com/publicapi/add
fi