#!/bin/bash

# Creates alias symlinks to create site aliases
# Symlinks are created both in the group root dir and
# the alias target site dir's "sites" directory.

# include library file
. "`dirname ${0}`/drupalLibrary.sh"


printUsage() {
	echo -e " "
	echo -e "Creates alias symlinks to create an alias on a drupal installation (or all installations in a group)."
	echo -e "For more info, see script header."
	echo -e " "
	echo -e "Usage:"
	echo -e "$0 [-quiet] {-remove <existing alias> | <new alias> <INSTALL> } [install group root dir]"
	echo -e "where:"
	echo -e " "
	echo -e "-quiet minimizes output."
	echo -e " "
	echo -e "<existing alias>"
	echo -e "\tIf specified with -remove, removes an existing alias."
	echo -e " "
	echo -e "<new alias>"
	echo -e "\tThe name of the new alias for the given <INSTALL> site."
	echo -e " "
	outputInstallGroupUsage
	echo -e " "
}


#########

# Param handling
if [ $# -eq 0 ]; then
	printUsage
	exit 0
fi

# Handle flags
while (true); do
	case "${1}" in
	-quiet )
		pQuiet="-quiet"
		shift
		;;
	-remove )
		if [ $# == 1 ]; then
			echo -e "** Must specify an alias to remove with -remove.  Aborting.\n"
			printUsage
			exit 1
		fi
		pRemove="${2}"
		shift; shift
		;;

	* )
		break
		;;
	esac
done

if [ -z "${pQuiet}" ]; then
	echo " "
fi

# Process
if [ -z "${pRemove}" ]; then
	# # New alias

	# check parameters -- need 2 or 3 parameters
	if [ $# -lt 2 -o $# -gt 3 ]; then
		echo -e "** Invalid number of parameters specified.  Aborting.\n"
		printUsage
		exit 1
	fi

	pNewAlias=${1}

	# process Group Root Dir
	pRootDir="`getGroupRootDir "${3}"`"
	errorStr="`validateGroupRootDir "${pRootDir}"`"
	if [ -n "${errorStr}" ]; then
		echo -e "${errorStr}\n"
		printUsage
		exit 1
	fi

	# Validate the installation
	pInstall="${2}"
	errorStr="`validateSite "${pInstall}" "${pRootDir}"`"
	if [ -n "${errorStr}" ]; then
		echo -e "** Error with specified install: ${errorStr}.  Aborting.\n"
		exit 1
	fi

	# process
	errorStr="`createSiteAlias "${pNewAlias}" "${pInstall}" "${pRootDir}"`"
	if [ -n "${errorStr}" ]; then
		echo -e "** Error creating alias '${pNewAlias}' for site '${pInstall}': ${errorStr}\n"
	fi

else
	# # Remove alias

	# check parameters -- can only have one (optional) parameter (the group root dir)
	if [ $# -gt 1 ]; then
		echo -e "** Invalid number of parameters specified.  Aborting.\n"
		printUsage
		exit 1
	fi

	# process Group Root Dir
	pRootDir="`getGroupRootDir "${1}"`"
	errorStr="`validateGroupRootDir "${pRootDir}"`"
	if [ -n "${errorStr}" ]; then
		echo -e "${errorStr}\n"
		printUsage
		exit 1
	fi

	# Validate the alias
	errorStr="`validateAlias "${pRemove}" "${pRootDir}"`"
	if [ -n "${errorStr}" ]; then
		echo -e "** Error with specified alias: ${errorStr}.  Aborting.\n"
		exit 1
	fi

	# process
	errorStr="`removeSiteAlias "${pRemove}" "${pRootDir}"`"
	if [ -n "${errorStr}" ]; then
		echo -e "** Error removing symlink: ${errorStr}\n"
		exit 1
	fi
fi

# Done
if [ -z "${pQuiet}" ]; then
	echo -e "** Done."
fi