#!/bin/bash
# Copyright 2010-2012, Asio Software Technologies
# Distributed under the terms of the GNU General Public License v3


#-------------------------------------------------------------------------------
# Downloads files into specified or current directory
# Parameters: %url% %directory%
#-------------------------------------------------------------------------------
function download() {
	local DEST FILENAME RESULT URL
	DEST="${2}"
	FILENAME="${1##*/}"
	URL="${1}"
	if isSet DEST; then
		DEST="${DEST}/${FILENAME}"
	else
		DEST="./${FILENAME}"
	fi
	logMessage "Downloading ${URL} to ${DEST}" "DEBUG"
	echo -ne "   ${STAR_GREEN} ${FILENAME}:     "
	wget --progress=dot -c -t ${FETCHTRIES} -T ${FETCHTIMEOUT} -O "${DEST}" \
		${URL} 2>&1 | grep --line-buffered "%" | sed -u -e "s/[\.\,]//g" | \
		awk '{printf("\b\b\b\b%4s", $2)}'
	RESULT=${PIPESTATUS[0]}
	echo -ne "\b\b\b\b"
	if [ ${RESULT} -ne 0 ]; then
		logOutput "Unable to download ${URL}! Exit code: ${RESULT}"
		echo -e "${COLOR_RED}${COLOR_BOLD}ERROR${COLOR_WHITE}${COLOR_NORMAL}"
	else
		echo -e "${COLOR_GREEN}${COLOR_BOLD}DONE${COLOR_WHITE}${COLOR_NORMAL}"
	fi
	return ${RESULT}
}

#-------------------------------------------------------------------------------
# Creates all components of the specified directories
# Parameters: %directory%
#-------------------------------------------------------------------------------
function makeDirectory() {
	local OUTPUT RESULT
	OUTPUT=$(install -d "${@}" 2>&1)
	RESULT=${?}
	if [ ${RESULT} -ne 0 ]; then
		logOutput "${OUTPUT}"
	fi
	return ${RESULT}
}

#-------------------------------------------------------------------------------
# Creates a symbolic link between to files in specified target directory
# Parameters: %source% %target%
#-------------------------------------------------------------------------------
function makeLink() {
	local DESTDIR OUTPUT RESULT
	DESTDIR="${2%/*}"
	[[ ! -d ${DESTDIR} ]] && makeDirectory "${DESTDIR}"
	OUTPUT=$(ln -sfn "${1}" "${2}" 2>&1)
	RESULT=${?}
	if [ ${RESULT} -ne 0 ]; then
		logOutput "${OUTPUT}"
	fi
	return ${RESULT}
}

#-------------------------------------------------------------------------------
# Extracts any tar based archive into specified directory
# Parameters: %tarball% %destination%
#-------------------------------------------------------------------------------
function unpack() {
	local DST EXT OUTPUT RESULT SRC
	SRC="${1}"
	DST="${2}"
	EXT=$(toLower "${SRC##*.}")
	if [ ! -d ${DST} ]; then
		makeDirectory ${DST} || return 1
	fi
	case "${EXT}" in
		bz2)
			if [ -e /usr/bin/pbzip2 ]; then
				OUTPUT=$(pbzip2 -dc "${SRC}" 2>&1 | tar xpf - -C "${DST}" 2>&1)
			else
				OUTPUT=$(tar xjpf "${SRC}" -C "${DST}" 2>&1)
			fi
			RESULT=${?}
			;;
		gz|xz|z)
			OUTPUT=$(tar xpf "${SRC}" -C "${DST}" 2>&1)
			RESULT=${?}
			;;
		*)
			OUTPUT="Unrecognized source compression for ${SRC}"
			RESULT=1
			;;
	esac
	if [ ${RESULT} -ne 0 ]; then
		logOutput "${OUTPUT}"
	fi
	return ${RESULT}
}