#!/bin/bash

while read -r line
do
    TYPE=$(echo $line | cut -d ' ' -f1)
    ID=$(echo $line | cut -d ' ' -f2)

    # create new tags from input line, for example: 
    # key1_added "value1" key2_added "value2" key3_removed key4_removed

    # key should not quoted, value must be quoted
    # And keys which need to be removed must be placed at the end
    NEW_TAGS=$(echo $line |\
               cut -d' ' -f3- |\
               sed -r 's/([^ "]+) (\"[^"]+\")/<tag k=\"\1\" v=\2\/>/g; s/>[^"]*$/>/')

    TAG_PATTERN=$(echo $line |\
                  cut -d' ' -f3- | xargs -n2 echo |\
                  cut -d' ' -f1 | paste -s -d'|')

    echo $NEW_TAGS > /dev/tty

    cat $1 |\
    sed -nr "/<$TYPE id=\"$ID\"/,/<\/$TYPE/ {
             /<$TYPE id=\"$ID\"/ a \ \ \ \ $NEW_TAGS
             /<tag k=\"($TAG_PATTERN)\"/ !p
             /<\/$TYPE/ q
            }" >> $1.osc
done

sed -ir '1 i <osmChange version="0.6" generator="bash script">
         1 i <modify>
         $ a </modify>
         $ a </osmChange>' $1.osc