# Copyright 1999-2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# Author: Matthias Schwarzott <zzam@gentoo.org>
# Author: Joerg Bornkessel <hd_brummy@gentoo.org>

DESCRIPTION="Manage VDR plugins"
MAINTAINER="vdr@gentoo.org"

inherit multilib

find_plugins() {
	local plugins plugin f plugindir="${EROOT}/usr/$(get_libdir)/vdr/plugins"

	for f in ${plugindir}/libvdr-*.so* ; do
		[[ -e ${f} ]] || continue

		plugin="${f##*/libvdr-}"
		plugin="${plugin%.so.*}"
		plugins="${plugins}\n${plugin}"
	done

	echo -ne ${plugins} | sort -u
}

show_enabled_plugins() {
	local plugins line conffile="${EROOT}/etc/conf.d/vdr.plugins"

	exec 3<${conffile}
	while read plugin <&3; do
		[ "${plugin}" = "" ] && continue
		[ "${plugin#"#"}" != "${plugin}" ] && continue
		plugins="${plugins}\n${plugin}"
	done

	echo -ne ${plugins} | sort -u
}

is_enabled() {
	local conffile="${EROOT}/etc/conf.d/vdr.plugins"
	
	egrep -q "^${1}\$" "${conffile}" || return 1
	return 0
}

plugin_exists() {
	local f plugindir="${EROOT}/usr/$(get_libdir)/vdr/plugins"

	for f in ${plugindir}/libvdr-${1}.so.*; do
		[[ -e "${f}" ]] && return 0
	done
	return 1
}

### show action ###

describe_show() {
	echo "Show enabled VDR plugins"
}

do_show() {
	local plugins
	[[ -z "${@}" ]] || die -q "Too many parameters"

	plugins=( $(show_enabled_plugins) )

	write_list_start "Enabled VDR plugins:"
	if [[ -n "${plugins[@]}" ]] ; then
		set -- "${plugins[@]}"
		for plugin; do
			write_kv_list_entry "${plugin}" ""
		done
	else
		write_kv_list_entry "(none enabled)" ""
	fi
}

### list action ###

describe_list() {
	echo "List available VDR plugins"
}

do_list() {
	local opts
	plugins=( $(find_plugins) )
	write_list_start "Available VDR plugins:"

	for (( n = 0 ; n < ${#plugins[@]} ; ++n )) ; do
		is_enabled ${plugins[${n}]} && \
			plugins[${n}]=$(highlight_marker "${plugins[${n}]}")
	done
	write_numbered_list -m "(none found)" "${plugins[@]}"

	return 0
}

### enable action ###

describe_enable() {
	echo "Enable specified Plugin(s)"
}

describe_enable_parameters() {
	echo "<plugin>"
}

describe_enable_options() {
	echo "<plugin> : Plugin name"
}

do_enable() {
	local conffile="${EROOT}/etc/conf.d/vdr.plugins" plugins plugin

	[[ -z ${1} ]] && die -q "You didn't specify any plugins to enable."

	# make sure we have proper permissions
	[[ -w ${conffile} ]] || \
		die -q "You don't have permission to write to ${conffile}"

	plugins=( $(find_plugins) )

	for plugin in $@ ; do
		local p=${plugin}
		
		is_number ${p} && \
			p=${plugins[$(( ${p} - 1 ))]}

		[[ -z "${p}" ]] && \
			die -q "Plugin \"${plugin}\" doesn't appear to be valid!"

		plugin=${p}

		# ignore any unrecognized options
		[[ ${plugin} == --* ]] && continue

		# does plugin exist
		if ! plugin_exists "${plugin}"; then
			write_error_msg "Plugin ${plugin} doesn't exist"
			continue
		fi

		# already enabled?
		if is_enabled "${plugin}"; then
			write_error_msg "Plugin ${plugin} is already enabled"
			continue
		fi

		# finally, add it to conffile
		echo "${plugin}" >> "${conffile}"
	done
}

### disable action ###

describe_disable() {
	echo "Disable specified plugin(s)"
}

describe_disable_parameters() {
	echo "<plugin>"
}

describe_disable_options() {
	echo "<plugin> : Plugin name"
}


do_disable() {
	local conffile="${EROOT}/etc/conf.d/vdr.plugins" plugins plugin

	[[ -z ${1} ]] && die -q "You didn't specify any plugins to disable"

	[[ -w ${conffile} ]] || \
		die -q "You don't have permission to write to ${conffile}"

	plugins=( $(find_plugins) )

	for plugin in $@ ; do
		local p=${plugin}
		
		is_number ${p} && \
			p=${plugins[$(( ${p} - 1 ))]}

		[[ -z "${p}" ]] && \
			die -q "Plugin \"${plugin}\" doesn't appear to be valid!"

		plugin=${p}

		# ignore any unrecognized options
		[[ ${plugin} == --* ]] && continue

		# is in installed?
		if ! is_enabled "${plugin}"; then
			write_error_msg "${plugin} is not enabled"
			continue
		fi

		sed -e "/^${plugin}\$/d" -i "${conffile}"
	done
}

# vim: set ft=eselect :