#!/bin/bash
# ----------------------------------------------------------------------------
# /var/install/bin/cui-lcd4linux-cycle-layouts.sh - Cycle through all configured layouts
# Creation:     2010-01-09 Y. Schumann
# Copyright (c) 2001-2015 The eisfair Team, <team(at)eisfair(dot)org>
# Distributed under the terms of the GNU General Public License v2
# ----------------------------------------------------------------------------

exec 2> /tmp/cui-lcd4linux-cycle-layouts-trace$$.log
set -x

# include libs
. /var/install/include/eislib
. /var/install/include/configlib

packageName=cui-lcd4linux
nativeMainConfiguration='/etc/lcd4linux/lcd4linux.main.conf'
currentLayoutFile='/etc/lcd4linux/lcd4linux.currentlayout'

# Load configurations
. /etc/config.d/$packageName
if [ -f $currentLayoutFile ] ; then
    . $currentLayoutFile
else
    currentActiveLayout=1
    echo "$currentActiveLayout" > $currentLayoutFile
fi


# ----------------------------------------------------------------------------
# Update native lcd configuration by cycling through configured layouts
# ----------------------------------------------------------------------------
cycleLayout () {
    nextLayout=$((currentActiveLayout+1))

    # At first count active layouts
    idx=1
    activeLayouts=0
    while [ ${idx} -le ${LCD_LAYOUT_N} ] ; do
        # Loop over all configured layouts
        eval active='$LCD_LAYOUT_'${idx}'_ACTIVE'
        if [ "$active" == 'yes' ] ; then
            activeLayouts=$((activeLayouts+1))
        fi
        idx=$((idx+1))
    done

    # If next layout number is greater than the number of available
    # active layouts, restart cycle on layout 1.
    if [ ${nextLayout} -gt ${activeLayouts} ] ; then
        nextLayout=1
    fi

    # Now determine the layout name to activate
    idx=1
    idx2=1
    while [ ${idx} -le ${LCD_LAYOUT_N} ] ; do
        # Loop over all configured layouts
        eval active='$LCD_LAYOUT_'${idx}'_ACTIVE'
        if [ "$active" == 'yes' ] ; then
            if [ ${idx2} -eq ${nextLayout} ] ; then
                eval layoutName='$LCD_LAYOUT_'${idx2}'_NAME'
                sed -e "s#Layout '.*'\$#Layout '$layoutName'#g" ${nativeMainConfiguration} > ${nativeMainConfiguration}.new
                mv ${nativeMainConfiguration}.new ${nativeMainConfiguration}
			    chmod 600 ${nativeMainConfiguration}
			    chown root.root ${nativeMainConfiguration}
                rc-service cui-lcd4linux restart
                echo "currentActiveLayout=$nextLayout" > ${currentLayoutFile}
                return
            fi
            idx2=$((idx2+1))
        fi
        idx=$((idx+1))
    done
}


# ============================================================================
# Main
# ============================================================================
if [ "${START_LCD}" == 'yes' ] ; then
    cycleLayout
fi

# ============================================================================
# End
# ============================================================================