# Copyright 1999-2017 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: xdg-utils.eclass
# @MAINTAINER:
# gnome@gentoo.org
# @AUTHOR:
# Original author: Gilles Dartiguelongue <eva@gentoo.org>
# @BLURB: Auxiliary functions commonly used by XDG compliant packages.
# @DESCRIPTION:
# This eclass provides a set of auxiliary functions needed by most XDG
# compliant packages.
# It provides XDG stack related functions such as:
#  * XDG .desktop files cache management
#  * XDG mime information database management

case "${EAPI:-0}" in
	0|1|2|3|4|5|6) ;;
	*) die "EAPI=${EAPI} is not supported" ;;
esac

# @ECLASS-VARIABLE: DESKTOP_DATABASE_UPDATE_BIN
# @INTERNAL
# @DESCRIPTION:
# Path to update-desktop-database
: ${DESKTOP_DATABASE_UPDATE_BIN:="/usr/bin/update-desktop-database"}

# @ECLASS-VARIABLE: DESKTOP_DATABASE_DIR
# @INTERNAL
# @DESCRIPTION:
# Directory where .desktop files database is stored
: ${DESKTOP_DATABASE_DIR="/usr/share/applications"}

# @ECLASS-VARIABLE: MIMEINFO_DATABASE_UPDATE_BIN
# @INTERNAL
# @DESCRIPTION:
# Path to update-mime-database
: ${MIMEINFO_DATABASE_UPDATE_BIN:="/usr/bin/update-mime-database"}

# @ECLASS-VARIABLE: MIMEINFO_DATABASE_DIR
# @INTERNAL
# @DESCRIPTION:
# Directory where .desktop files database is stored
: ${MIMEINFO_DATABASE_DIR:="/usr/share/mime"}

# @FUNCTION: xdg_environment_reset
# @DESCRIPTION:
# Clean up environment for clean builds.
xdg_environment_reset() {
	# Prepare XDG base directories
	export XDG_DATA_HOME="${HOME}/.local/share"
	export XDG_CONFIG_HOME="${HOME}/.config"
	export XDG_CACHE_HOME="${HOME}/.cache"
	export XDG_RUNTIME_DIR="${T}/run"
	mkdir -p "${XDG_DATA_HOME}" "${XDG_CONFIG_HOME}" "${XDG_CACHE_HOME}" \
		"${XDG_RUNTIME_DIR}" || die
	# This directory needs to be owned by the user, and chmod 0700
	# https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
	chmod 0700 "${XDG_RUNTIME_DIR}" || die

	unset DBUS_SESSION_BUS_ADDRESS
}

# @FUNCTION: xdg_desktop_database_update
# @DESCRIPTION:
# Updates the .desktop files database.
# Generates a list of mimetypes linked to applications that can handle them
xdg_desktop_database_update() {
	local updater="${EROOT}${DESKTOP_DATABASE_UPDATE_BIN}"

	if [[ ${EBUILD_PHASE} != post* ]] ; then
		die "xdg_desktop_database_update must be used in pkg_post* phases."
	fi

	if [[ ! -x "${updater}" ]] ; then
		debug-print "${updater} is not executable"
		return
	fi

	ebegin "Updating .desktop files database"
	"${updater}" -q "${EROOT}${DESKTOP_DATABASE_DIR}"
	eend $?
}

# @FUNCTION: xdg_mimeinfo_database_update
# @DESCRIPTION:
# Update the mime database.
# Creates a general list of mime types from several sources
xdg_mimeinfo_database_update() {
	local updater="${EROOT}${MIMEINFO_DATABASE_UPDATE_BIN}"

	if [[ ${EBUILD_PHASE} != post* ]] ; then
		die "xdg_mimeinfo_database_update must be used in pkg_post* phases."
	fi

	if [[ ! -x "${updater}" ]] ; then
		debug-print "${updater} is not executable"
		return
	fi

	ebegin "Updating shared mime info database"
	"${updater}" "${EROOT}${MIMEINFO_DATABASE_DIR}"
	eend $?
}