#!/bin/bash
# shellcheck source=kz-common.sh
###############################################################################
# GUI wijzigen.
#
# Geschreven door Karel Zimmer <info@karelzimmer.nl>.
###############################################################################

PROGRAM_PATH=$(realpath "$(dirname  "$0")")
readonly PROGRAM_PATH
source  "$PROGRAM_PATH"/kz-common.sh
readonly PROGRAM_NAME='kz-gset'
readonly DISPLAY_NAME=${PROGRAM_NAME/kz-/kz }
readonly RELEASE_YEAR=2015


###############################################################################
# Global constants
###############################################################################

readonly OPTIONS_SHORT=$OPTIONS_SHORT_COMMON'a:b:d:lrf:x:'
readonly OPTIONS_LONG=$OPTIONS_LONG_COMMON",addfavaft:,addfavbef:,delfav:,\
list,resetfavs,addappfolder:,delappfolder:"
readonly USAGE="Gebruik: $DISPLAY_NAME [-a|--addfavaft=FAVORITE] \
[-b|--addfavbef=FAVORITE]
                 [-d|--delfav=FAVORITE] [-l|--list] [-r|--resetfavs]
                 [-f|--addappfolder=APPFOLDER] [-x|--delappfolder=APPFOLDER]
                 $OPTIONS_USAGE_COMMON"
readonly HELP="Gebruik: $DISPLAY_NAME [OPTIE...]

GUI wijzigen.

Opties:
  -a, --addfavaft=FAVORITE
                 voeg FAVORITE toe aan het einde
  -b, --addfavbef=FAVORITE
                 voeg FAVORITE toe aan het begin
  -d, --delfav=FAVORITE
                 verwijder FAVORITE
  -l, --list     list favorits en appfolders
  -r, --resetfavs
                 reset favorites
  -f, --addappfolder=APPFOLDER
                 voeg APPFOLDER toe
  -x, --delappfolder=APPFOLDER
                 verwijder APPFOLDER
$OPTIONS_HELP_COMMON"


###############################################################################
# Global variables
###############################################################################

declare APPFOLDER=''
declare CONFIG_A=''
declare CONFIG_B=''
declare DESKTOPFILE=''
declare FAVORITE_ARGUMENT=''
declare FOLDER_ARGUMENT=''
declare OPTION_ADDAPPFOLDER=false
declare OPTION_ADDFAVAFT=false
declare OPTION_ADDFAVBEF=false
declare OPTION_DELAPPFOLDER=false
declare OPTION_DELFAV=false
declare OPTION_LIST=false
declare OPTION_RESETFAVS=false


###############################################################################
# Functions
###############################################################################

function check_input {
    local -i    getopt_rc=0
    local       parsed=''

    parsed=$(
        getopt  --alternative                       \
                --options       "$OPTIONS_SHORT"    \
                --longoptions   "$OPTIONS_LONG"     \
                --name          "$DISPLAY_NAME"     \
                --              "$@"
        )       || getopt_rc=$?
    if [[ $getopt_rc -ne $SUCCESS ]]; then
        process_usage
        NOERROR=true exit $ERROR
    fi
    eval set -- "$parsed"
    process_common_options "$@"

    while true; do
        case $1 in
            -a|--addfavaft)
                OPTION_ADDFAVAFT=true
                FAVORITE_ARGUMENT=$2
                shift 2
                ;;
            -b|--addfavbef)
                OPTION_ADDFAVBEF=true
                FAVORITE_ARGUMENT=$2
                shift 2
                ;;
            -d|--delfav)
                OPTION_DELFAV=true
                FAVORITE_ARGUMENT=$2
                shift 2
                ;;
            -l|--list)
                OPTION_LIST=true
                shift
                ;;
            -r|--resetfavs)
                OPTION_RESETFAVS=true
                shift
                ;;
            -f|--addappfolder)
                OPTION_ADDAPPFOLDER=true
                FOLDER_ARGUMENT=$2
                shift 2
                ;;
            -x|--delappfolder)
                OPTION_DELAPPFOLDER=true
                FOLDER_ARGUMENT=$2
                shift 2
                ;;
            --)
                shift
                break
                ;;
            *)
                shift
                ;;
        esac
    done

    if [[ "$*" ]]; then
        info 'Geen argumenten toegestaan.'
        process_usage
        NOERROR=true exit $ERROR
    fi

    APPFOLDER=$FOLDER_ARGUMENT
    DESKTOPFILE=$FAVORITE_ARGUMENT.desktop

    check_user_root
}


function process_input {
    if $OPTION_ADDFAVAFT; then
        process_option_addfavaft
    elif $OPTION_ADDFAVBEF; then
        process_option_addfavbef
    elif $OPTION_DELFAV; then
        process_option_delfav
    elif $OPTION_LIST; then
        process_option_list
    elif $OPTION_RESETFAVS; then
        process_option_resetfavs
    elif $OPTION_ADDAPPFOLDER; then
        process_option_addappfolder
    elif $OPTION_DELAPPFOLDER; then
        process_option_delappfolder
    else
        capture_gui_changes
    fi
}


function process_option_addfavaft  {
    local favorite_apps=''

    favorite_apps=$(gsettings get org.gnome.shell favorite-apps)
    if [[ $favorite_apps = '@as []' ]]; then
        gsettings set org.gnome.shell favorite-apps "['$DESKTOPFILE']"
    elif !  printf '%s' "$favorite_apps" |
            grep --quiet --word-regexp --regexp="$DESKTOPFILE"; then
        gsettings set org.gnome.shell favorite-apps "$(
            printf '%s' "$favorite_apps" |
            cut --delimiter=']' --fields=1
            ), '$DESKTOPFILE']"
    fi
}


function process_option_addfavbef  {
    local favorite_apps=''

    favorite_apps=$(gsettings get org.gnome.shell favorite-apps)
    if [[ $favorite_apps = '@as []' ]]; then
        gsettings set org.gnome.shell favorite-apps "['$DESKTOPFILE']"
    elif !  printf '%s' "$favorite_apps" |
            grep --quiet --word-regexp --regexp="$DESKTOPFILE"; then
        gsettings set org.gnome.shell favorite-apps \
            "['$DESKTOPFILE', $(
                printf '%s' "$favorite_apps" | cut --delimiter='[' --fields=2
                )"
    fi
}


function process_option_delfav  {
    local favorite_apps=''

    favorite_apps=$(gsettings get org.gnome.shell favorite-apps)
    if [[ $favorite_apps = '@as []' ]]; then
        :
    elif [[ $favorite_apps = "['$DESKTOPFILE']" ]]; then
        gsettings set org.gnome.shell favorite-apps "[]"
    else gsettings set org.gnome.shell favorite-apps "$(
        printf  '%s' "$favorite_apps"                   |
        sed     --expression="s/'$DESKTOPFILE', //g"    |
        sed     --expression="s/, '$DESKTOPFILE'//"
        )"
    fi
}


function process_option_list  {
    gsettings get org.gnome.shell favorite-apps
    gsettings get org.gnome.desktop.app-folders folder-children
}


function process_option_resetfavs  {
    gsettings reset org.gnome.shell favorite-apps
}


function process_option_addappfolder  {
    local app_folders=''
    local schema=''
    local path=''

    app_folders=$(gsettings get org.gnome.desktop.app-folders folder-children)

    if [[ $app_folders = '@as []' ]]; then
        set org.gnome.desktop.app-folders folder-children "['$APPFOLDER']"
    elif !  printf  '%s' "$app_folders" |
            grep    --quiet             \
                    --word-regexp       \
                    --regexp="$APPFOLDER"; then
        gsettings set org.gnome.desktop.app-folders folder-children "$(
            printf '%s' "$app_folders" | cut --delimiter=']' --fields=1
            ), '$APPFOLDER']"
    fi
    schema=org.gnome.desktop.app-folders.folder
    path=/org/gnome/desktop/app-folders/folders/$APPFOLDER/
    gsettings set "$schema":"$path" name        "$APPFOLDER"
    gsettings set "$schema":"$path" translate   true
    gsettings set "$schema":"$path" categories  "['$APPFOLDER']"
}


function process_option_delappfolder  {
    local app_folders=''
    local schema=''
    local path=''

    app_folders=$(gsettings get org.gnome.desktop.app-folders folder-children)

    if [[ $app_folders = '@as []' ]]; then
        :
    elif [[ $app_folders = "['$APPFOLDER']" ]]; then
        gsettings set org.gnome.desktop.app-folders folder-children "[]"
    else gsettings set org.gnome.desktop.app-folders folder-children "$(
            printf '%s' "$app_folders" | sed --expression="s/, '$APPFOLDER'//"
            )"
    fi
    schema=org.gnome.desktop.app-folders.folder
    path=/org/gnome/desktop/app-folders/folders/$APPFOLDER/
    gsettings reset-recursively "$schema":"$path"
}


function capture_gui_changes {
    CONFIG_A=$(mktemp -t "$PROGRAM_NAME-A-XXXXXXXXXX.lst")
    save_configuration_database A "$CONFIG_A"
    info 'Voer nu de wijziging uit in de grafische werkomgeving.'
    read -rp 'Druk op de Enter-toets wanneer gereed [Enter]: '
    CONFIG_B=$(mktemp -t "$PROGRAM_NAME-B-XXXXXXXXXX.lst")
    save_configuration_database B "$CONFIG_B"
    report_database_changes "$CONFIG_A" "$CONFIG_B"
}


function save_configuration_database {
    local fase=${1:-fase?}
    local output_file=${2:-output_file?}

    gsettings list-recursively > "$output_file" 2> >($LOGCMD)

    sort    --unique                \
            --output="$output_file" \
            "$output_file"

    info "Inhoud configuratiedatabase vastgelegd ($fase)."
}


function report_database_changes {
    local output_file1=${1:-output_file1?}
    local output_file2=${2:-output_file2?}

    info '
WIJZIGINGen in de configuratiedatabase,
< is de oude   instelling (A),
> is de nieuwe instelling (B):'
    diff "$output_file1" "$output_file2" | grep --regexp='[>|<]' || true
    info "
Bij WIJZIGINGen voer uit: ${BLUE}gsettings set WIJZIGING${NORMAL}"
    rm "$CONFIG_A" "$CONFIG_B"
}


function term_script {
    exit $SUCCESS
}


###############################################################################
# Script
###############################################################################

function main {
    init_script "$@"
    check_input "$@"
    process_input
    term_script
}

main "$@"