keepeye.sh

# This is a simple script to keep an eye on OSM relations and detect when they break.
# When you run the script, it simply checks if the status of the relation is OK or not, according to ra.osmsurround.org
# It can optionally also check wether the length is still equal to the listed length.
#
# First of all, you need clear text file, in wich you write down the relation number you want to check.

# (optional): 	You can add a comma, followed by the relation length, expressed in KM, with decimal separator "."
# 		for example: 52997,7.161
# 		(in order to get the length for your relations, you scrape them from  http://ra.osmsurround.org/analyzeRelation using a modified version of this script.
#
# Warning: the command on line 26 and 49 is used to round down the length to two decimal digits. This might not work, depending on your locale. Please read https://unix.stackexchange.com/questions/167058/how-to-round-floating-point-numbers-in-shell if you have problems
#
# Questions: s8evq@runbox.com


# Change the two variables below
list="/change/path/to/relations_to_check"
tmp_html="/tmp/keepeye.html"


grep -v "#" $list | while read list_line

do

list_relationnr=$(echo $list_line | cut -f1 -d,)
list_length=$(echo $list_line | cut -s -f2 -d, | xargs printf "%.*f\n" '2')


# sleep function. so the script does not bother the ra.osmsurround.org website too much
sleep 1


wget -q --header='Accept-Language: en-us' --user-agent Mozilla/4.0  -O $tmp_html "http://ra.osmsurround.org/analyzeRelation?relationId=$list_relationnr&noCache=true&_noCache=on"


#check status
if grep "alert-error" $tmp_html > /dev/null ; then
	echo -n "NOT OK $list_relationnr "
	grep "alert-heading" $tmp_html | cut -f2 -d ">" | cut -f1 -d "<"
else
	if ! grep "alert-success" $tmp_html > /dev/null ; then
	echo "Other error with $list_relationnr"
	fi
fi



#check length
grepped_length=$(grep "Length in KM: <span class=\"label label-info\">" $tmp_html | cut -f2 -d ">" | cut -f1 -d "<" | xargs printf "%.*f\n" '2')
if [ ! -z $list_length ] ; then
	if [ ! "$(echo $grepped_length==$list_length | bc -l)" == 1 ]; then
		echo "NOT OK $list_relationnr Length does not match. Was $grepped_length instead of $list_length".
	fi
fi


done