#!/bin/sh

# Datum stranky musi byt vyssi, nez YYYYMMDD
MIN_DATE=20180101

# adresa klubu
BASE_URL="https://www.okoun.cz/boards/bastleni"

# tmp soubor se vsemi id
ID_FILE=/tmp/temp_id_`basename $0`_$$

# tmp soubor se vsemi timestampy
TIMESTAMP_FILE=/tmp/temp_timestamp_`basename $0`_$$



function read_url () {
	lynx --dump $1 |\
	egrep "^\s+[0-9]{1,}\.\s+(https://www.okoun.cz/msgbox.do\?rcpt=\w+|${BASE_URL}\?f=[0-9]{8}-[0-9]{6})$" |\
	sed -e 's/^.*?f=/f /' -e 's/^.*msgbox.do?rcpt=/rcpt /'
}

function test_temp () {
	if [ -f $1 ]; then
		echo "ERROR: temp file '$1' already exist!"
		exit 1
	fi
}

function parse_url () {

	pg_date=$1
	pg_time=$2
	url=${BASE_URL}
	
	if [ $pg_date -ne 0 ]; then
		url="${BASE_URL}?f=${pg_date}-${pg_time}";
	fi
	
	test_temp ${TIMESTAMP_FILE}
	touch ${TIMESTAMP_FILE}
	
	read_url ${url} |\
	while read key value; do
		if [ "${key}" = "rcpt" ]; then
			echo "${value}" >> ${ID_FILE}
		else
			t_pg_date=`echo "${value}" | tr '-' ' ' | awk '{print $1}'`
			t_pg_time=`echo "${value}" | tr '-' ' ' | awk '{print $2}'`

			if [ $t_pg_date -ge $MIN_DATE ]; then
				if [ $pg_date -eq 0 ]; then
					echo "${t_pg_date} ${t_pg_time}" >> ${TIMESTAMP_FILE}
				else 
					if [ $t_pg_date -lt $pg_date ]; then
						echo "${t_pg_date} ${t_pg_time}" >> ${TIMESTAMP_FILE}
					else 
						if [ $t_pg_date -eq $pg_date ] && [ $t_pg_time -lt $pg_time ]; then
							echo "${t_pg_date} ${t_pg_time}" >> ${TIMESTAMP_FILE}
						fi
					fi
				fi
			fi
		fi
	done

	sort ${TIMESTAMP_FILE} | uniq | tail -1
	rm -f ${TIMESTAMP_FILE}
}

test_temp ${ID_FILE}
touch ${ID_FILE}

pg_date=0
pg_time=0
parse_next=1

while [ $parse_next -eq 1 ]; do
	timestamp=`parse_url ${pg_date} ${pg_time}`
	parse_next=0
	
	#echo "${timestamp}"; timestamp=""
	
	if [ ! -z "${timestamp}" ]; then
	
		pg_date=`echo "${timestamp}" | awk '{print $1}'`
		pg_time=`echo "${timestamp}" | awk '{print $2}'`
		
		if [ $pg_date -ge $MIN_DATE ]; then
			echo "Go to timestamp: ${pg_date}-${pg_time}"
			parse_next=1
		fi
	fi
done

echo -e "\n============ users ============"

sort ${ID_FILE} | uniq

rm -f ${ID_FILE}

exit 0