Ticket #447: migrate-aliases.sh

    #!/bin/sh

    # extract from the kmessrc file (the ${2}) the contact and the associated nicks
    #       from the user "${1}"
    # example use: get_names_nick zeds_back@hotmail.com ~/.kde/share/config/kmessrc
    # return: a "$contact -> $nick" stream
    get_names_nick() {
        grep "\[Contact_${1}/" "${2}" -A 1 | sed '{
            N
            s|[^/]*/\([^]]*\)].*alternativeName=\(.*\)|\1 -> \2|g
            N
        }' | grep -v -- '--'
    }

    # overwrite for the contact ${1} the nick ${2}, reading on the contactlist ${3}
    # example use: set_new_nick vito_pasculli@libero.it "Vito Pasculli"
    #       ~/.kde4/share/apps/kmess/zeds_back\@hotmail.com/contactlist
    # return: a stream containg the contactlist, with the nick "Vito Pasculli"
    #       associated to the contact vito_pasculli@libero.it
    set_new_nick() {
        sed "/\[Contacts]\[${1}]\[Extension]/ {
            N
            s/alternativeName=.*/alternativeName=${2}/
            N
            N
            N
            N
            N
            N
            N
            N
            N
            s/useAlternativeName=.*/useAlternativeName=true/
        }" "${3}"
    }

    # main script :)
    # fondamentally: for each "$contact" -> "$nick" extracted from the kmessrc, set
    #       the nick into the contactlist
    # ${1} is the kmessrc file
    # ${2} is the contactlist file
    # ${3} is the user nick
    # example use: main ~/.kde/share/config/kmessrc
    #       ~/.kde4/share/apps/kmess/zeds_back\@hotmail.com/contactlist
    #       zeds_back@hotmail.com
    # return: a stream representing the new contactlist
    main() {
        tmpfile="$(mktemp)"
        cp "${2}" "${tmpfile}"
        get_names_nick "${3}" "${1}" | while read row; do
            contact="${row/\ ->\ */}"
            nick="${row/*\ ->\ /}"
            cp "${tmpfile}" "${tmpfile}~"
            set_new_nick "${contact}" "${nick}" "${tmpfile}~" > "${tmpfile}"
        done
        cat "${tmpfile}"
        rm "${tmpfile}"
    }

    # the only 2 executed lines :P
    [ -z "${3}" ] && echo "USAGE: ${0} kmessrcfile contactlistfile user_nick" && exit -1
    main "${1}" "${2}" "${3}"