#!/usr/bin/env bash
# vim: set expandtab ts=4 sw=4:
#
# Generate lircrc files for various applications
#
# Usage: See help function below
#
# BTN_* keys in namespace are ignored.

readonly   LIRC_CONF='/etc/lirc/lircd.conf'
readonly   OUTPUT_DIR="$HOME/.config/lirc"

declare -a  ALL_LIRCD_KEYS      # All buttons in /etc/lirc/lircd.conf
declare -a  BAD_LIRCD_KEYS      # Buttons not listed by irrecord -l
declare -a  DUPLICATE_KEYS
declare -a  GOOD_KEYS
declare -a  GOOD_KEYS=( $( irrecord -l |
                               egrep '^KEY_|BTN_LEFT|BTN_RIGHT' |
                               egrep -v 'KEY_KP[0-9]' |
                               egrep -v 'KEY_NUMERIC_[0-9]')
)
GOOD_KEYS+=('MOUSE_NW' 'MOUSE_N' 'MOUSE_NE'
            'MOUSE_W' 'MOUSE_E' 'MOUSE_SW' 'MOUSE_SE')
readonly GOOD_KEYS


declare -A OPTIONS             # Option values, with single-letter
                               # option as key.
function help
{
    cat << EOF
Generate lirc configuration files.

Usage:
    $( basename $0 ) -s [-c file]
    $( basename $0 ) -u [-c file]
    $( basename $0 ) -l
    $( basename $0 ) [-o directory] [-c file] [files...]
    $( basename $0 ) [-d] [-c file] [files...]

Options:

 -s         Scan lircd file for unusable keycodes and exit.
 -u         Update existing lircd file to use key symbols in namespace.
 -l         List available files to generate.
 -d         Dump file template(s) usable as stdin on stdout.
 -o <dir>   Output directory, defaults to $OUTPUT_DIR.
 -c <file>  lircd(8) config file, defaults to $LIRC_CONF.
 -h         Print this message.
 -m         Display manpage.

[files] is a list of files to build or dump, as listed by -l. Defaults
to all available files except stdin.

Only one of the options -s, -u, -l  and -d can be given.
EOF
}

function manpage()
{
    cat << EOF
.TH $(basename $0)"1" "Last change: Sep 2014" "lircd 0.9.4b" \
    "System Administration Utilities"
.SH NAME
$(basename $0) \- tool to scan and generate lirc config files
.SH SYNOPSIS
.br
.B
.LL 90
$(basename $0) \fR  \-s|-u [ -c FILE]
.br
.B
.LL=20
$(basename $0) \fR [-o DIR] [-d] [-c FILE] [FILES]
.br
.B
$(basename $0) \fR  \-l
.br
.SH OPTIONS
Without options, generates all available application specific lircrc
files  in ~/.config/lirc. The optional [files] is a list of files to
build or dump, as listed by -l.
.TP
\fB\-s\fR
Scan lircd file for key symbols which are duplicated or not in namespace.
.TP
\fB\-u\fR
Update existing lircd file to use key symbols in namespace.
.TP
\fB\-l\fR
List available files to generate.
.TP
\fB\-d\fR
Dump file templates usable as stdin on stdout.
.TP
\fB\-o \<dir\>\fR
Output directory, defaults to ~/.config/lirc
.TP
\fB\-c \<lircd-filename\>\fR
lircd(8) config file, defaults to /etc/lirc/lircd.conf
.TP
\fB\-h\fR
Print help message
.PP
.SH DESCRIPTION
.PP
The script is designed to assist in the setup of the lirc(8)
configuration files for ordinary remote controls. It is not aimed
to handle full-blown keyboards or joystick devices. The generated
lircrc files represents a starting point which will need further,
manual refinements but might "work" in a basic sense in many cases.
.PP
The setup involves normalizing the lircd.conf to use symbols in the
legal namespace, and to create application specific lircrc files which
uses the normalized symbols.
.PP
To assist normalizing /etc/lircd.conf, the script can report symbols
used which not are in the namespace. It can can also update many of
these symbols to corresponding symbols within the namespace.
.PP
The script also can create application specific lircrc files such as
mythtv.lircrc or vlc.lircrc. It then  uses  the normalized
key symbols in /etc/lirdc.conf. By default, files are created in
~/.config/lirc.
.PP
Generated lircrc files basically combines known keys from
/etc/lirc/lircd.conf with template data for an application. The process
results in a lircrc file, a list a of unused keys and some entries
which don't match any existing key. The unused keys and unmatched entries
are written as comments into the generated file.

An 'illegal' key i. e., a key not in namespace, will not match any entry
and will thus always be unused. However, it's perfectly possible to
use it later on while manually modifying the lircrc files.
.PP
When updating files, script always makes backup copies.
.PP
The generated lircrc files are intended to be included in a main
~/.config/lircrc file. A minimal such might look like
.IP
    include ~/.config/lirc/mythtv.lircrc

.SH EXAMPLES
.PP

Scan /etc/lirc/lircd.conf for duplicated symbols and symbols not in namespace:
.IP
$(basename $0) -s
.PP
Update a local lircd.conf file to use symbols in namespace:
.IP
$(basename $0) -uc ./lircd.conf
.PP
List available files to generate:
.IP
$(basename $0) -l
.PP
Generate one of the files listed by -l, creates ~/.config/lirc/mythtv.lircrc:
.IP
$(basename $0) mythtv
.PP
Dump template data  for mythtv:
.IP
$(basename $0) -d mythtv \>mythtv.lircdata
.PP
Use possibly edited data to create a modified mythtv.lircrc in current dir:
.IP
$(basename $0) -o . stdin \< mythtv.lircdata

.SH LIRCD.CONF CONVERSIONS
The -s option simply reports all key symbols not in namespace. It also
reports some symbols which although legal are inappropriate in this
context, notably KEY_NUMERIC_0..KEY_NUMERIC_9. If present, duplicated
keys are also reported.

The -u option converts several known symbols to their corresponding
KEY_* symbols. Symbols which have names like KEY_WINDOWS but not are in
namespace gets a X_ prefix e. g., KEY_WINDOWS -> X_KEY_WINDOWS. The
converted file thus guarantees that any key symbol starting with
KEY_ is a legal symbol.

All known numeric keys such as '1', 'KEY_1', 'KEY_KP_1', 'KEY_NUMERIC_1
 are converted to KEY_1.

All modifications are marked by comments in file.

.SH EXTENDING
The script can be extended to support more applications by providing a shell
function named *.lircdata. E. g., to add a new application named
"my_app" based on the built-in vlc application:
.PP
.ft CW
         $ $(basename $0) -d vlc >my_app.lircdata
         $ function my_app_lircdata()
         > {
         >    cat my_app.lircdata
         > }
         $ export -f my_app_lircdata
         $ $(basename $0)  my_app
.ft R

.SH DATA FORMAT
The script uses a simple, line-oriented format to represent the lircrc files.
The purpose of the format is to be compact and thus to give a good overview,
and also to be easy to parse.  Each line is divided in comma-separated tokens.
There are four kind of lines.
.PP
Comment lines begins with a '#'. These are copied verbatim to the output file.
.PP
The first data line represents global items, applicable to all entrys. The
first word is the program name. It's used in the first 'program=' line.
Following words, if present, are optional lines which will be appended to each
entry in the file.
.PP
A data line starting with 'begin' or 'end' is a  mode block designator. It's
copied verbatim to output file.
.PP
All other data lines represents a button/config entry. The format is
.ft CW
    <button> <config> [extra]\.\.\.
.ft
.br
The button value  is used in the  button = line, and the config item is used
in the config = line. Both are mandatory. Following items, if any, are copied
as verbatim lines to the entry.
.PP
An unlikely example: The data format

.ft CW
    myprog, flags = quit
    begin volume_mode
    KEY_VOLUMEUP, volume-up, delay=4, repeat=1
    KEY_VOLUMEDOWN, volume-down
    end volume_mode
.ft
.PP
translates to:
.PP
.ft CW
    begin volume_mode
        begin
            program = myprog
            button  = KEY_VOLUME_UP
            config  = volume-up
            delay   = 4
            repeat  = 1
            flags   = quit
        end
        begin
            program = myprog
            button  = KEY_VOLUME_DOWN
            config  = volume-down
            flags   = quit
        end
    end volume_mode
.ft

.SH COPYRIGHT
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
.SH "SEE ALSO"
.PP
lircd(8)
.br
http://www.lirc.org/ - Main lirc documentation

EOF
}


function vlc_popupmenu_mode_lircdata
{
    xdotool="env DISPLAY=:0 xdotool"
    xdotool_vlc="$xdotool search \' - VLC\'"
    cat <<EOF
      # Handle the context menu by letting xdotool emulate right click etc.
      irexec, flags  = quit
      begin vlc
        KEY_UP,     $xdotool_vlc key Up
        KEY_DOWN,   $xdotool_vlc key Down
        KEY_LEFT,   $xdotool_vlc key Left
        KEY_RIGHT,  $xdotool_vlc key Right
        KEY_OK,     $xdotool_vlc key Return
        KEY_ENTER,  $xdotool_vlc key Return
        KEY_MENU,   $xdotool_vlc mousemove --window %1 200 200 click 3
        KEY_BACK,   $xdotool mousemove_relative --  -10 -10 click 1
      end vlc
EOF
}


function vlc_lircdata
{
    cat <<EOF
        # See http://wiki.videolan.org/How_to_Use_Lirc
        vlc
        KEY_REWIND,             key-slower
        KEY_FASTFORWARD,        key-faster
        KEY_MUTE,               key-vol-mute
        KEY_STOP,               key-quit
        KEY_EXIT,               key-quit
        KEY_PAUSE,              key-pause
        KEY_PLAY_PAUSE.         key-play-pause
        KEY_PLAY,               key-play
        KEY_VOLUMEUP,           key-vol-up
        KEY_VOLUMEDOWN,         key-vol-down
        KEY_DVD,                key-disc-menu
        KEY_NEXT,               key-next
        KEY_PREVIOUS,           key-prev
        KEY_SUBTITLE,           key-subtitle-track
        KEY_AUDIO,              key-audiodevice-cycle
        KEY_LANGUAGE,           key-audiotrack
        KEY_NEXTSONG,           key-next
        KEY_PAGEUP,             key-next
        KEY_PAGEDOWN,           key-previous
        KEY_PREVIOUSSONG,       key-previous
        KEY_TV,                 key-aspect-ratio
        KEY_SCALE,              key-toggle-autoscale
        KEY_ZOOMIN,             key-incr-scalefactor
        KEY_ZOOMOUT,            key-decr-scalefactor
EOF
}


function mplayer_lircdata
{
    cat <<EOF
        # See http://www.mplayerhq.hu/DOCS/HTML/en/control.html
        mplayer
        KEY_UP,                 pt_up-step 1,         delay = 5
        KEY_DOWN,               pt_up_step -1,        delay = 5
        KEY_LEFT,               pt_step -1,           delay = 5
        KEY_RIGHT,              pt_step 1,            delay = 5
        KEY_REWIND,             seek -30 0
        KEY_FASTFORWARD,        seek +30 0
        KEY_MUTE,               mute
        KEY_VOLUMEUP,           volume +1,            delay = 5
        KEY_VOLUMEDOWN,         volume -1,            delay = 5
        KEY_POWER,              quit
        KEY_STOP,               quit
        KEY_CHANNELDOWN,        tv_step_channel -1,   delay = 5
        KEY_CHANNELUP,          tv_step_channel +1,   delay = 5
        KEY_PLAYPAUSE,          pause
        KEY_PAUSE,              pause
        KEY_PLAY,               seek +1
        KEY_MENU,               osd
        KEY_F11                 vo_fullscreen
        TBD_AUDIO_DELAY_UP,     audio_delay +0.1,     delay = 5
        TBD_AUDIO_DELAY_DOWN,   audio_delay -0.1,     delay = 5
EOF
}


function mythtv_lircdata
{
    cat << EOF
        # See http://www.mythtv.org/wiki/LIRC and
        # http://www.mythtv.org/wiki/Keybindings
        mythtv
        KEY_UP,                 Up,                   delay = 5
        KEY_DOWN,               Down,                 delay = 5
        KEY_LEFT,               Left,                 delay = 5
        KEY_RIGHT,              Right,                delay = 5
        KEY_END,                End
        KEY_PAGEUP,             PageUp
        KEY_PAGEDOWN,           PageDown
        KEY_REWIND,             <
        KEY_FASTFORWARD,        >
        KEY_NEXT,               Z
        KEY_PREVIOUS,           Q
        KEY_MUTE,               |
        KEY_CHANNELDOWN,        Down,                 delay = 5
        KEY_CHANNELUP,          Up,                   delay = 5
        KEY_OK,                 Return
        KEY_MENU,               M
        KEY_INFO,               I
        KEY_PAUSE,              P
        KEY_PLAY,               P
        KEY_PLAYPAUSE,          P
        KEY_RECORD,             R
        KEY_0,                  0
        KEY_1,                  1
        KEY_2,                  2
        KEY_3,                  3
        KEY_4,                  4
        KEY_5,                  5
        KEY_6,                  6
        KEY_7,                  7
        KEY_8,                  8
        KEY_9,                  9
        KEY_CLEAR,              Esc
        KEY_ENTER,              Return
        KEY_DELETE,             D
        KEY_EPG,                S
        KEY_CYCLEWINDOWS,       W
        KEY_TUNER,              C
        TBD_CYCLE_COLOR_CTRL,   F
        TBD_NEXT_FAVO_CHAN,     /
        TBD_TOGGLE_FAVO_STATUS, ?
        TBD_INCREASE_SPEED,     U,                    delay = 5
        TBD_DECREASE_SPEED,     J,                    delay = 5
EOF
}


function volume_mythtv_lircdata
# Separate, since many (most?) doesn't use myth internal volume control.
{
    cat << EOF
        mythtv
        KEY_VOLUMEDOWN,          [
        KEY_VOLUMEUP,            ]
EOF
}


function volume_pulse_lircdata
# Volume control using the module-lirc pulseaudio plugin.
{
    cat << EOF
        # See http://www.pulseaudio.org/wiki/Modules#module-lirc
        PulseAudio
        KEY_VOLUMEDOWN,          volume-down
        KEY_VOLUMEUP,            volume-up
        X_TBD,                   mute-toggle
        X_TBD,                   mute
        X_TBD,                   reset
EOF
}


function volume_alsa_lircdata
# Volume control using the alsa mixer.
{
    local volume_lines="repeat = 10, delay  = 10"
    cat << EOF
        irexec
        KEY_VOLUMEDOWN, amixer set Master 3%- &> /dev/null, $volume_lines
        KEY_VOLUMEUP,   amixer set Master 3%+ &> /dev/null, $volume_lines
EOF
}


function mode_numeric_lircdata
{
    local xdotool="env DISPLAY=:0 xdotool"
    cat << EOF
    irexec, flags  = quit
        begin numeric
           KEY_0,              $xdotool key 0
           KEY_1,              $xdotool key 1
           KEY_2,              $xdotool key 2
           KEY_3,              $xdotool key 3
           KEY_4,              $xdotool key 4
           KEY_5,              $xdotool key 5
           KEY_6,              $xdotool key 6
           KEY_7,              $xdotool key 7
           KEY_8,              $xdotool key 8
           KEY_9,              $xdotool key 9
           TBD_NUMERIC_POUND,  $xdotool key TBD
           TBD_NUMERICSTAR,    $xdotool key TBD
        end numeric
EOF
}


function mode_browser_lircdata
{
    local xdotool="env DISPLAY=:0 xdotool"
    local arrow_lines="repeat = 1, delay  = 4"
    local mousemove="$xdotool mousemove_relative"
    cat << EOF
        # Uses arrow keys + OK-buttons to move cursor and click.
        # Numeric keyboard are used as arrow keys on a PC keyboard.
        # Note the flash-download script, it's just an example.
        irexec, flags  = quit
        begin browser
           KEY_OK,            $xdotool click 1
           KEY_INFO,          $xdotool click 3
           KEY_BACK,          $xdotool key Escape
           KEY_UP,            $mousemove 0 -10,     $arrow_lines
           KEY_DOWN,          $mousemove 0 10,      $arrow_lines
           KEY_RIGHT,         $mousemove 10 0,      $arrow_lines
           KEY_LEFT,          $mousemove -- -10 0,  $arrow_lines
           KEY_TV,            $xdotool key F11
           KEY_CHANNELUP,     $xdotool key ctrl+plus
           KEY_CHANNELDOWN,   $xdotool key ctrl+minus
           KEY_HOME,          $xdotool key alt+F4
           KEY_STOP,          $xdotool key ctrl+q
           KEY_PREVIOUS,      $xdotool key ctrl+shift+Tab
           KEY_NEXT,          $xdotool key ctrl+Tab
           KEY_PAUSE,         $xdotool key Space
           KEY_RECORD,        /usr/local/bin/flash-download &
           KEY_PLAY,          $xdotool key Tab
           KEY_STOP,          $xdotool key ctrl+q
           KEY_FASTFORWARD,   $xdotool key alt+Right
           KEY_REWIND,        $xdotool key Escape
           KEY_1,             $xdotool key Home
           KEY_2,             $xdotool key Up
           KEY_3,             $xdotool key Page_Up
           KEY_4,             $xdotool key Left
           KEY_5,             $xdotool key Return
           KEY_6,             $xdotool key Right
           KEY_7,             $xdotool key End
           KEY_8,             $xdotool key Down
           KEY_9,             $xdotool key Page_Down
           KEY_ENTER,         $xdotool key Return
        end browser
EOF
}


function stdin_lircdata()
{
    cat
}


function print_data
{
    eval ${1}_lircdata |
      sed -e 's/^[ ]*//#   Strip leading blanks' \
          -e 's/[ ]*$//#   Strip trailing blanks' \
          -e 's/,[ ]*/,/g# "a,    b" -> "a,b"' || {
                  echo "Cannot invoke function $1_lircdata. Sigh." >&2
                  exit 2
          }
}


function print_lircd_entry
{
    local prog=$1; local button=$2; local config=$3;

    echo
    echo "    begin"
    echo "        prog   = $prog"
    echo "        button = $button"
    echo "        config = $config"
    shift 3
    for line in "$@"; do
       test -n "$line" &&  echo "        $line"
    done
    echo "    end"
}


function print_lircd_trailer
# Print a header + a list of items on stdin as a comment block
{
    local header="${1:-Missing header}"
    local indent="$2"

    echo "# $header"
    echo '#'
    awk -v indent="$indent" '{ print "#" indent $0 }'
    echo '#'
}


function read_data_line
# Read a line using ',' as IFS
{
    local OLDIFS="$IFS"
    IFS=','
    local result=0
    read $@ || result=$?
    IFS="$OLDIFS"
    return $result
}


function make_lircrc
#
#  Create the lircrc file on stdout
#
#  Input:
#     - stdin: list of data lines in print_data format (see manpage).
#     - Global ALL_LIRCD_KEYS, BAD_LIRCD_KEYS.
{
    local unused_keys=( ${ALL_LIRCD_KEYS[@]} )
    local unused_entries key entry

    echo "# Created by $0 at $(date)"
    echo
    local prog extra1 extra2
    while [[ "$prog" ==  \#* || "$prog" == ''  ]]; do
        test "$prog" != '' && echo $prog
        read_data_line prog extra1 extra2
    done

    while read_data_line button config line1 line2 line3
    do
        lines=( "$line1" "$line2" "$line3" "$extra1" "$extra2" )
        if [[ "$button" == \#* ]]; then
            echo $button $config $line1 $line2 $line3
        elif [[ "$button" == begin* || "$button" = end* ]]; then
            echo
            echo "$button $config"
        elif [[ "${unused_keys[*]}" == *$button* ]] ; then
            print_lircd_entry  $prog $button "$config" "${lines[@]}"
            unused_keys=( $( echo ${unused_keys[@]/$button/} ) )
        else
            entry=$( print_lircd_entry \
                         $prog $button "$config" "${lines[@]}" )
            unused_entries=( "${unused_entries[@]}" "$entry" )
        fi
    done

    echo

    if (( ${#BAD_LIRCD_KEYS[@]} != 0 )); then
        for key in "${BAD_LIRCD_KEYS[@]}"; do
            echo $key
        done | print_lircd_trailer 'Illegal button names:' '    '
    fi

    if (( ${#unused_keys[@]} != 0 )); then
        for key in "${unused_keys[@]}"; do
            echo $key
        done | print_lircd_trailer  'Unused buttons:' '    '
    fi

    if (( ${#unused_entries[@]} != 0 )); then
        for entry in "${unused_entries[@]}"; do
            echo "$entry"
        done | print_lircd_trailer 'Unused capabilities:' ''
    fi
}


function get_path
# Construct output path for a target, make backup if required.
{
    local path="${OPTIONS['o']}/$1.lircrc"
    if test -f $path; then
        local backup=$path.$(date +"%y%m%d%H%M%S")
        cp $path $backup
    fi
    echo $path $backup
}


function print_lircd_keys
# Print all keycodes in /etc/lirc/lircd.conf
{
    awk '/begin[ ]+codes/,/end[ ]+codes/ {
                                           if ($1 == "begin")  next;
                                           if ($1 == "end" ) next;
                                           print $1;
                                         }' < ${OPTIONS['c']}
}


function parse_lircd
# Set up global ALL_LIRCD_KEYS and BAD_LIRCD_KEYS
{
    local key
    unset ALL_LIRCD_KEYS
    unset BAD_LIRCD_KEYS
    unset DUPLICATE_KEYS
    local all_keys

    for key in $( print_lircd_keys )
    do
        if [[ ${all_keys[@]} == *$key* ]]; then
            DUPLICATE_KEYS=( ${DUPLICATE_KEYS[@]} $key )
        fi
        all_keys=( ${all_keys[@]} $key )
        if [[ ${GOOD_KEYS[*]} == *$key* ]]
        then
            ALL_LIRCD_KEYS=( ${ALL_LIRCD_KEYS[@]} $key )
        elif test -n "${key##\#*}"
        then
            BAD_LIRCD_KEYS=( ${BAD_LIRCD_KEYS[@]} $key )
        fi
    done
}


function scan_keycodes
{
    local key
    parse_lircd

    local count=${#ALL_LIRCD_KEYS[@]}
    echo "Found $count button definitions in ${OPTIONS['c']}"

    if (( ${#DUPLICATE_KEYS[@]} != 0 )); then
        echo 'Duplicate keys:'
        for key in ${DUPLICATE_KEYS[@]}; do echo "    $key"; done
    fi
    if (( ${#BAD_LIRCD_KEYS[@]} != 0 )); then
        echo 'Unusable keys:'
        for key in ${BAD_LIRCD_KEYS[@]}; do echo "    $key"; done
    else
        echo "All definitions in legal namespace"
    fi
}


function check_targets
{
   local target
   local good_targets=( $( list_all_files ) )

   for target in $@; do
       if [[ ${good_targets[*]} != *$target* ]]; then
           echo "$target: Illegal target"
           exit 1
       fi
   done
}


function list_all_files
#  List all files i. e., list all functions of the form *_lircdata,
#  without the suffix
{
    declare -F | awk '/_lircdata$/ {
                                     gsub( "_lircdata","",$3)
                                     printf "%s ", $3
                                   }
                               END { print "" }'
}


function translate_key
# Convert "old style" key symbol to symbol in namespace,
# one token look-ahead.
{
    if [[ "$1" == KEY* ]]; then
        local key="$1"
    else
        local key=${1,,}
    fi
    case "${key}" in
        KEY_NUMERIC_[0-9]|KEY_KP[0-9]|[0-9]*)
                        echo $1 | sed 's/.*\([0-9]\)/KEY_\1/' ;;
        KEY_*)          if [[ ${GOOD_KEYS[*]} == *$1* ]]; then
                            echo "$1"
                        else
                            echo "X_$1"
                        fi
                        ;;
        '#'|'\*')       if [[ "$2" != 0x* ]]; then
                            echo $1
                            continue
                        fi
                        case $1 in
                            '\*') echo KEY_NUMERIC_STAR;;
                            '#')  echo KEY_NUMERIC_POUND;;
                            *)    echo X_WTF;;
                        esac
                        ;;
        *16:9*)         echo "16:9";;
        [a-z])          echo "KEY_${1^*}" ;;
        zero|up_zero)   echo "KEY_0" ;;
        one|up_one)     echo "KEY_1" ;;
        two|up_two)     echo "KEY_2" ;;
        three|up_three) echo "KEY_3" ;;
        four|up_four)   echo "KEY_4" ;;
        five|up_five)   echo "KEY_5" ;;
        six|up_six)     echo "KEY_6" ;;
        seven|up_seven) echo "KEY_7" ;;
        eight|up_eight) echo "KEY_8" ;;
        nine|up_nine)   echo "KEY_9" ;;

        appexit)        echo "KEY_EXIT" ;;
        arrow*up)       echo "KEY_UP";;
        arrow*down)     echo "KEY_DOWN";;
        arrow*left)     echo "KEY_LEF";;
        arrow*right)    echo "KEY_RIGHT";;
        asterisk)       echo "KEY_KPASTERISK" ;;
        audio)          echo "KEY_AUDIO" ;;
        back)           echo "KEY_BACK" ;;
        backspace)      echo "KEY_BACKSPACE" ;;
        backward)       echo "KEY_REWIND" ;;
        blue)           echo "KEY_BLUE" ;;
        cancel)         echo "KEY_CANCEL" ;;
        cd)             echo "KEY_CD" ;;
        ch+|ch*up|chan*+|chan*plus|channel+)
                        echo "KEY_CHANNELUP" ;;
        ch-|ch*down|chan*-|chan*minus|channel*)
                        echo "KEY_CHANNELDOWN" ;;
        clear)          echo "KEY_CLEAR" ;;
        close*)         echo "KEY_CLOSE" ;;
        delete)         echo "KEY_DELETE" ;;
        down)           echo "KEY_DOWN" ;;
        dvd*menu)       echo "KEY_MENU" ;;
        dvd*)           echo "KEY_DVD" ;;
        email)          echo "KEY_EMAIL" ;;
        eject)          echo "KEY_EJECTCD" ;;
        *exit)          echo "KEY_EXIT" ;;
        end)            echo "KEY_END" ;;
        enter)          echo "KEY_OK" ;;
        epg)            echo "KEY_EPG" ;;
        esc)            echo "KEY_ESC" ;;
        F[0-9])         echo $1 | sed 's/F\([0-9]\)/KEY_F\1/' ;;
        fast*forward|fast*fwd|ff|ffw|ffwd)
                        echo "KEY_FASTFORWARD" ;;
        fm|radio)       echo "KEY_RADIO" ;;
        folder*)        echo "KEY_DIRECTORY" ;;
        forward|fw|fwd|fwd_up)
                        echo "KEY_FORWARD" ;;
        green)          echo "KEY_GREEN" ;;
        guide)          echo "KEY_EPG" ;;
        hash)           echo "KEY_NUMERIC_POUND" ;;
        help)           echo "KEY_HELP" ;;
        home)           echo "KEY_HOME" ;;
        info)           echo "KEY_INFO" ;;
        lang*)          echo "KEY_LANGUAGE" ;;
        left)           echo "KEY_LEFT" ;;
        list)           echo "KEY_LIST" ;;
        live*tv)        echo "KEY_TV" ;;
        max*)           echo "KEY_MAX" ;;
        menu*up)        echo "KEY_UP";;
        menu*down)      echo "KEY_DOWN";;
        menu*right)     echo "KEY_RIGHT";;
        menu*left)      echo "KEY_LEFT";;
        menu)           echo "KEY_MENU" ;;
        minus)          echo "KEY_KPMINUS" ;;
        mode)           echo "KEY_MODE" ;;
        mp3)            echo "KEY_MP3" ;;
        mute)           echo "KEY_MUTE" ;;
        next*|skip)     echo "KEY_NEXT" ;;
        ok)             echo "KEY_OK" ;;
        on*demand)      echo "X_KEY_ONDEMAND";;
        onscreen*)      echo "KEY_EPG";;
        on*)            echo "KEY_POWER" ;;
        options)        echo "KEY_OPTIONS" ;;
        osd)            echo "KEY_EPG" ;;
        pause)          echo "KEY_PAUSE" ;;
        phone)          echo "KEY_PHONE" ;;
        pc)             echo "KEY_PC" ;;
        pg*up)          echo "KEY_PAGEUP";;
        pg*down|pg_dn)  echo "KEY_PAGEDOWN";;
        play*mode)      echo "X_KEY_PLAYMODE";;
        play*list)      echo "X_KEY_PLAYLIST";;
        play*pause)     echo "KEY_PLAYPAUSE" ;;
        play*)          echo "KEY_PLAY" ;;
        power*|pwr)     echo "KEY_POWER" ;;
        prev*ch)        echo "KEY_PREVIOUS" ;;
        prev)           echo "KEY_PREVIOUS" ;;
        prog*up|p+)     echo "KEY_CHANNELUP" ;;
        prog*down|p-)   echo "KEY_CHANNELDOWN" ;;
        pre|prev|prev*ch|preview)
                        echo "KEY_PREVIOUS" ;;
        quit)           echo "KEY_QUIT" ;;
        recall)         echo "KEY_AGAIN" ;;
        rec*)           echo "KEY_RECORD" ;;
        red)            echo "KEY_RED" ;;
        repeat|replay)  echo "KEY_AGAIN" ;;
        return)         echo "KEY_ENTER" ;;
        rew*)           echo "KEY_REWIND" ;;
        right)          echo "KEY_RIGHT" ;;
        select)         echo "KEY_SELECT" ;;
        setup)          echo "KEY_SETUP" ;;
        skipback)       echo "KEY_REWIND" ;;
        skipfwd)        echo "KEY_FASTFORWARD" ;;
        sleep)          echo "KEY_SLEEP" ;;
        slow)           echo "KEY_SLOW" ;;
        source)         echo "KEY_CYCLEWINDOWS" ;;
        space)          echo "KEY_SPACE" ;;
        star)           echo "KEY_NUMERIC_STAR" ;;
        start)          echo "KEY_PLAY" ;;
        stop)           echo "KEY_STOP" ;;
        sub*)           echo "KEY_SUBTITLE" ;;
        tab)            echo "KEY_TAB" ;;
        text|txt)       echo "KEY_TEXT" ;;
        time)           echo "KEY_TIME" ;;
        title)          echo "KEY_TITLE" ;;
        tv)             echo "KEY_TV" ;;
        up)             echo "KEY_UP" ;;
        vcr)            echo "KEY_VCR" ;;
        video*)         echo "KEY_VIDEO" ;;
        vol*+|vol*up|vol*plus)
                        echo "KEY_VOLUMEUP";;
        vol*-|vol*down|vol*minus)
                        echo "KEY_VOLUMEDOWN";;
        web|www*)       echo "KEY_WWW";;
        yellow)         echo "KEY_YELLOW" ;;
        zoom)           echo "KEY_ZOOM" ;;
        zoom+)          echo "KEY_ZOOMIN" ;;
        zoom-)          echo "KEY_ZOOMOUT" ;;

        '+')            echo "KEY_KPPLUS" ;;
        '-')            echo "KEY_KPMINUS" ;;
        '.')            echo "KEY_DOT" ;;

        *)              echo $1;;
    esac
}


function print_update_lircd_results()
{
    parse_lircd
    if (( $1 == 0 )); then
       echo "Conversion complete, no bad keys to convert"
    elif (( ${#BAD_LIRCD_KEYS[@]} == 0)); then
       echo "Conversion complete, all $1 bad keys converted ."
    else
       echo -n "$(( $1 - ${#BAD_LIRCD_KEYS[@]} )) keys converted,"
       echo " remaining keys not within namespace:"
       for key in ${BAD_LIRCD_KEYS[@]}; do
            echo "    $key"
       done
    fi
}


function update_lircd_conf
# Try to convert /etc/lirc/lircd to use keys in namespace
{
    parse_lircd
    local old_bad_key_count=${#BAD_LIRCD_KEYS[@]}

    local backup=${OPTIONS['c']}.$(date +"%y%m%d%H%M%S")
    cp ${OPTIONS['c']} $backup

    local reset_shopt=$( shopt -p nocasematch )
    shopt -s nocasematch

    local translate=0
    while read; do
        REPLY=${REPLY%%[[:space:]]}
        local words=( $( echo ${REPLY//\*/\\\*} ) ) # '*' -> '\*'
        case "${words[0]} ${words[1]}" in
            begin*codes )
                translate=1
                echo "$REPLY"
                ;;

            end*codes )
                translate=0;
                echo "$REPLY"
                ;;

            *)  if (( "$translate" == 0 )); then
                    echo "$REPLY"
                    continue
                fi
                key=$( translate_key "${words[@]}" )
                case "$key" in
                    \#*|${words[0]})
                        echo "$REPLY"; continue
                        ;;
                    *)  comment=" #  Was: ${words[0]}"
                        printf "          %-25s%-25s%s\n"  \
                            $key ${words[1]} "$comment"
                        ;;
                esac
        esac
    done <$backup >${OPTIONS['c']}

    eval $reset_shopt

    print_update_lircd_results $old_bad_key_count
}


function get_options()
# Set up global OPTIONS, handle simple options directly.
{
    OPTIONS['o']="$OUTPUT_DIR"
    OPTIONS['c']="$LIRC_CONF"
    OPTIONS['t']="$( list_all_files | sed 's/stdin//' )"
    OPTIONS['s']=0; OPTIONS['d']=0; OPTIONS['u']=0

    local flag
    while getopts "o:c:dlsumh" flag
    do
        case $flag in

         o|c)
              OPTIONS[$flag]="$OPTARG"
              ;;

         s|d|u)
              OPTIONS[$flag]=1
              ;;

         l)   list_all_files
              exit 0
              ;;

         m)   if [ -t 1 ]; then
                  manpage | nroff -man | more
              else
                  manpage
              fi
              exit 0
              ;;

         h)   help
              exit 0
              ;;

         *)   echo "Use \"$0 -h\"  for help" >&2
              exit 1
              ;;
         esac
    done
    shift $(( OPTIND - 1 ))

    if (( $# > 0 )); then
        check_targets "$@"
        OPTIONS['t']="$*"
    fi
}


function check_options
# More tests that options and env are sane, exits on error.
{

    [ -w ${OPTIONS['o']}  ] || mkdir -p ${OPTIONS['o']} || {
        echo "Cannot use output dir \"${OPTIONS['o']}\"" >&2
        exit 1
    }
    [ -r ${OPTIONS['c']} ] || {
        echo "Cannot read input file \"${OPTIONS['c']}\"" >&2
        exit 1
    }
    [[ ${OPTIONS[*]} == *stdin* ]] && [ -z "${OPTIONS['p']}" ] && {
        echo "You need to give -p when using stdin" >&2
        exit 1
    }
    if (( ${OPTIONS['s']} +  ${OPTIONS['d']} + ${OPTIONS['u']}   > 1 ))
    then
        echo "Options s, d  and u are mutually exclusive."
        exit 1
    fi
    irrecord -v &> /dev/null || {
        echo "Cannot find irrecord command (not installed?)" >&2
        exit 2
    }
}


function print_created_file
# Report created file, either single file or file + backup
{
    local file=$( basename "$1")
    if [ -n "$2" ]; then
       local backup=$( basename $2 )
       printf "    %-25s Backup: %s\n" $file $backup
    else
       echo   "    $file"
    fi
}


function print_lircd_summary
{
    echo "Scanned ${OPTIONS['c']}"
    echo -n "    Found ${#ALL_LIRCD_KEYS[@]} key symbols"
    (( ${#BAD_LIRCD_KEYS[@]} != 0 )) && \
         echo -n ", ${#BAD_LIRCD_KEYS[@]} unusable"
    echo '.'
}

get_options "${@}"
check_options

if (( ${OPTIONS['s']} != 0 )); then
    scan_keycodes
elif (( ${OPTIONS['u']} != 0 )); then
    update_lircd_conf
elif (( ${OPTIONS['d']} != 0 )); then
    for target in $( echo ${OPTIONS['t']} ); do
        eval ${target}_lircdata
    done
else
    echo "Output dir:"
    echo "    ${OPTIONS['o']}"

    parse_lircd
    print_lircd_summary

    echo "Created:"
    for target in $( echo ${OPTIONS[t]} )
    do
        paths=( $( get_path $target ) )
        print_data $target | make_lircrc >"${paths[0]}"
        print_created_file ${paths[@]}
    done
fi
