#!/bin/sh

## Includes.
. funcPlay
. funcStop
. functmpGet
. functmpSet
. funcWidgetSchedule

## Position on the previous/next folder in the playlist.
## On entry: $1 = -1 for previous, 1 for next

funcFolderPreviousNext() {
	if [ -z "$BASH" ]; then local FUNCNAME=funcFolderPreviousNext; fi
	if [ $DEBUG_TRANSITS -ne 0 ]; then echo "$FUNCNAME: IN"; fi

	## Local variables.
	local playerstate=`functmpGet playerstate`
	local playlistindex=`functmpGet playlistindex`
	local playlistcount=`functmpGet playlistcount`
	local playlistindices="`functmpGet playlistindices`"
	local item previousindex previous2index
	local line playlisttrack

	if [ $playlistcount -gt 0 ]; then
		if [ $1 -eq -1 ]; then
			## Initialise previousindex with the last item.
			for item in $playlistindices; do
				previousindex=$item
			done
			## Locate the previous folder in the playlist.
			for item in $playlistindices $playlistcount; do
				if [ $playlistindex -lt $item ]; then
					playlistindex=$previous2index
					break
				elif [ $playlistindex -eq $item ]; then
					playlistindex=$previousindex
					break
				fi
				previous2index=$previousindex
				previousindex=$item
			done
		else
			## Locate the next track in the playlist.
			for item in $playlistindices $playlistcount; do
				if [ $playlistcount -eq $item ]; then
					playlistindex=0
					break
				elif [ $playlistindex -lt $item ]; then
					playlistindex=$item
					break
				fi
			done
		fi
		line=$(($playlistindex + 1))
		playlisttrack="`sed -n ${line}p $TEMP_DIR/playlist`"
		functmpSet playlistindex $playlistindex
		functmpSet playlisttrack "$playlisttrack"

		## Stop a paused or playing track and auto-play the next.
		if [ $playerstate = paused -o $playerstate = playing ]; then
			funcStop
			funcPlay
		fi
		funcWidgetSchedule muiCoverRefreshCheck coverrefreshcheck
		funcWidgetSchedule muiTrackInfoRefreshCheck trackinforefreshcheck
	fi

	if [ $DEBUG_TRANSITS -ne 0 ]; then echo "$FUNCNAME: OUT"; fi
}