Bash script to e-mail errors that show up in my nginx error log since the previous day

email-error-logs.sh

#!/bin/bash

SITES=( dev.inspirevive.com invoicedapp.com invoice-generator.com infuse.jaredtking.com jaredtking.com printable-calendar.co )

DATE_FORMAT="+%Y/%m/%d"
YESTERDAY=$(date --date="yesterday" $DATE_FORMAT)
TODAY=$(date $DATE_FORMAT)

function parseLog {
  NUM_ERRORS=0
	ERRORS=""
	
	while read LINE
	do
	if [[ $LINE == $1* ]] || [[ $LINE == $2* ]] ;
	then
		ERRORS="$ERRORS\n$LINE"
		NUM_ERRORS=$((NUM_ERRORS+1))
	fi
	done < $3
	
	if [ "$NUM_ERRORS" -gt "0" ] ;
	then
		MESSAGE="Top of the morning to you,\n\n$NUM_ERRORS error(s) showed up in the $3 logs since yesterday\n\n$ERRORS"
		echo -e $MESSAGE | mail -s "$NUM_ERRORS error(s) on $4" jared@nfuseweb.com
	fi
}

for SITE in ${SITES[@]}
do
	echo -e "\n--- Parsing log file for $SITE\n"
	parseLog $YESTERDAY $TODAY "/var/www/log/$SITE-error.log" $SITE
done