#!/bin/bash
set -e
PROGNAME=$(basename $0)
#  $HeadURL: http://sos16-vip/svn/kickstart/trunk/bin/defaults-dumper $ $LastChangedRevision: 669 $

#  Load libraries
. $(dirname $0)/../include/mkdi.sh

main()
{
    local TARGET_HOSTNAME TARGET_RELEASE

    #  Defaults for options
    VERBOSELEVEL=2

    #  Process options
    while [ "X$1" != X ]; do
        case $1 in 
            #  Application specific options
            --target-hostname=*) TARGET_HOSTNAME=${1#*=} ;;
            --target-release=*)  TARGET_RELEASE=${1#*=} ;;
            #  General options
            --help|-h)           usage 0 ;;
            --verbose|-v)        VERBOSELEVEL=3 ;;
            -d)                  VERBOSELEVEL=$2; shift ;;
            --debug=*)           VERBOSELEVEL=${1#*=} ;;
            --)                  shift; break ;;
            -*)                  usage ;;
            *)                   break ;; 
        esac
        shift
    done

    #  Process arguments
    [ $# -ge 1 ] || usage
    MODE=$1; shift
    debug 10 "main: MODE=$MODE"

    #  Guts
    case $MODE in
        create) create --target-hostname=$TARGET_HOSTNAME --target-release=$TARGET_RELEASE "$@" || return $? ;;
        delete) delete --target-hostname=$TARGET_HOSTNAME --target-release=$TARGET_RELEASE "$@" || return $? ;;
        list)   list "$@" || return $? ;;
        purge)  purge "$@" || return $? ;;
        *)      usage ;;
    esac

    return 0
}

create()
{
    local TARGET_HOSTNAME TARGET_RELEASE

    #  Process options
    while [ "X$1" != X ]; do
        case $1 in
            #  Application specific options
            --target-hostname=*) TARGET_HOSTNAME=${1#*=} ;;
            --target-release=*)  TARGET_RELEASE=${1#*=} ;;
            #  General options
            --)                  shift; break ;;
            -*)                  internal "create: $1: invalid option" ;;
            *)                   break ;; 
        esac
        shift
    done

    #  Process arguments
    [ $# = 0 ] || internal "create: $#: wrong arg count"
    
    #  Create entry
    info "enabling repository access ..."
    create_or_delete --target-hostname=$TARGET_HOSTNAME --target-release=$TARGET_RELEASE create || return $?

    return 0
}

delete()
{
    local TARGET_HOSTNAME TARGET_RELEASE

    #  Process options
    while [ "X$1" != X ]; do
        case $1 in
            #  Application specific options
            --target-hostname=*) TARGET_HOSTNAME=${1#*=} ;;
            --target-release=*)  TARGET_RELEASE=${1#*=} ;;
            #  General options
            --)                  shift; break ;;
            -*)                  internal "delete: $1: invalid option" ;;
            *)                   break ;;
        esac
        shift
    done

    #  Process arguments
    [ $# = 0 ] || internal "delete: $#: wrong arg count"
   
    #  Delete entry
    info "disabling repository access ..."
    create_or_delete --target-hostname=$TARGET_HOSTNAME --target-release=$TARGET_RELEASE delete || return $?

    return 0
}

create_or_delete()
{
    local TARGET_HOSTNAME TARGET_RELEASE
    local APACHE_OUTPUT MODE REPOS REPO TAG

    #  Process options
    while [ "X$1" != X ]; do
        case $1 in
            #  Application specific options
            --target-hostname=*) TARGET_HOSTNAME=${1#*=} ;;
            --target-release=*)  TARGET_RELEASE=${1#*=} ;;
            #  General options
            --)                  shift; break ;;
            -*)                  internal "create_or_delete: $1: invalid option" ;;
            *)                   break ;;
        esac
        shift
    done

    #  Process arguments
    [ $# = 1 ] || internal "create_or_delete: $#: wrong arg count"
    MODE=$1
    
    #  Sanity checks and derivations
    eval "REPOS=\"\$${TARGET_RELEASE}_REPOS\""
    debug 10 "create_or_delete: REPOS=\"$REPOS\""
    validate_vars MODE TARGET_HOSTNAME TARGET_RELEASE || return $?
    for REPO in $REPOS; do
        eval "TAG=\"\$${TARGET_RELEASE}_${REPO}_TAG\""
        validate_vars TAG || return $?
    done
    debug 10 "main: MODE=$MODE, TARGET_HOSTNAME=$TARGET_HOSTNAME, TARGET_RELEASE=$TARGET_RELEASE"

    #  Guts
    if [ $MODE = create ]; then
        debug 10 "create_or_delete: availing repos ..."
        for REPO in $REPOS; do
            eval "TAG=\"\$${TARGET_RELEASE}_${REPO}_TAG\""
            $PAA_CMD avail  $REPO-$TARGET_RELEASE $TAG $TARGET_HOSTNAME || { error "paa avail: failed"; return 1; }
            $PAA_CMD apache $REPO-$TARGET_RELEASE      $TARGET_HOSTNAME > /etc/apache2/mkdi.d/$REPO-$TARGET_RELEASE.$TARGET_HOSTNAME || { error "paa apache: failed"; return 1; }
        done
 
    elif [ $MODE = delete ]; then
        debug 10 "create_or_delete: unavailing repos ..."
        for REPO in $REPOS; do
            eval "TAG=\"\$${TARGET_RELEASE}_${REPO}_TAG\""
            $PAA_CMD unavail $REPO-$TARGET_RELEASE $TARGET_HOSTNAME || { error "paa unavail: failed"; return 1; }
            rm -f /etc/apache2/mkdi.d/$REPO-$TARGET_RELEASE.$TARGET_HOSTNAME
        done
    fi

    APACHE_OUTPUT=$(/etc/init.d/apache2 reload 2>&1) || { error "apache restart failed ($APACHE_OUTPUT)"; return 1; }

    return 0
}

purge()
{
    #  Guts
    rm /etc/apache2/mkdi.d/* 2>/dev/null || true

    return 0
}

list()
{
   #  Process options
    while [ "X$1" != X ]; do
        case $1 in
            #  Application specific options
            #  General options
            --)                  shift; break ;;
            -*)                  internal "list: $1: invalid option" ;;
            *)                   break ;;
        esac
        shift
    done

    #  Process arguments
    [ $# = 0 ] || internal "list: $#: wrong arg count"

    #  Guts
    ls -lrt /etc/apache2/mkdi.d/* 2>/dev/null
    $PAA_CMD -l list

    return 0
}

usage()
{
    local RC

    RC=${1:-1}

    {
        echo "Usage: $PROGNAME [ <options> ] { create <hostname> | delete <hostname> | list }"
        echo
    } | if [ $RC = 0 ]; then
        cat
    else
        cat >&2
    fi

    exit $RC
}

main "$@"