#!/bin/bash
#  $HeadURL$ $LastChangedRevision$
set -e
PROGNAME=$(basename $0)

#  Load support functions
. $(pcms-config PCMS_SHARE_PREFIX)/scripts/support.sh

main()
{
    local -a LINEINFILE_OPTS

    #  Defaults for options
    VERBOSELEVEL=2
    LOGIC=true
    PRESENT=unset
    BEFORE=unset
    AFTER=unset
    REPLACE=unset
    TEXT=unset
    FILE=unset
  
    #  Process options
    while [ $# -ge 1 ]; do
        case $1 in
            --present=*|--before=*|--after=*|--replace=*|--text=*) LINEINFILE_OPTS=("${LINEINFILE_OPTS[@]}" "$1") ;;
            --file=*)        FILE=${1#*=} ;;
            -d)              VERBOSELEVEL=$2; shift ;;
            --debug=*)       VERBOSELEVEL=${1#*=} ;;
            -v|--verbose)    VERBOSELEVEL=3 ;;
            --)              shift; break ;;
            -*)              error "main: $1: bad option" ;;
            *)               break ;;
        esac
        shift
    done

    #  Sanity checks and derivations

    #  Guts
    TMP_FILE=$(mktemp)
    TMP2_FILE=$(mktemp)
    ini2txt < $FILE > $TMP_FILE
    debug 10 "main: calling [lineinfile --debug=$VERBOSELEVEL ${LINEINFILE_OPTS[*]} --file=$TMP_FILE] ..."
    lineinfile --debug=$VERBOSELEVEL "${LINEINFILE_OPTS[@]}" --file=$TMP_FILE
    txt2ini < $TMP_FILE > $TMP2_FILE
    rm -f $TMP_FILE
    cmp -s $FILE $TMP2_FILE || cat $TMP2_FILE > $FILE
    rm -f $TMP2_FILE
}

ini2txt()
{
    local LINE SECTION
    while read LINE; do
        if [[ $LINE =~ ^\[(.*)\]$ ]]; then
            SECTION=${BASH_REMATCH[1]}
        elif [[ $LINE =~ ^[\t\ ]*$ ]]; then
            :
        else
            echo "$SECTION:$LINE"
        fi
    done
}

txt2ini()
{
    local LINE SECTION
    local -A SECTIONS
    cat > /tmp/$PROGNAME.$$.txt2ini
    while read LINE; do
        [[ $LINE =~ ^([^:]*):.* ]]
        SECTIONS[${BASH_REMATCH[1]}]=whatever
    done < /tmp/$PROGNAME.$$.txt2ini
    for SECTION in "${!SECTIONS[@]}"; do
        echo "[$SECTION]"
        sed -n "s/^$SECTION://p" /tmp/$PROGNAME.$$.txt2ini
        echo
    done
}

main "$@"