# Copyright 2004-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

# @ECLASS: xdg-utils.eclass
# @MAINTAINER:
# gnome@gentoo.org
# freedesktop-bugs@gentoo.org
# @AUTHOR:
# Original author: Gilles Dartiguelongue <eva@gentoo.org>
# @SUPPORTED_EAPIS: 5 6 7 8
# @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:
#  * GTK/Qt5 icon theme cache management
#  * XDG .desktop files cache management
#  * XDG mime information database management

case ${EAPI} in
	5|6|7|8) ;;
	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
esac

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

# @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="${HOME}/.cache"
	export XDG_STATE_HOME="${HOME}/.local/state"
	export XDG_RUNTIME_DIR="${T}/run"
	mkdir -p "${XDG_DATA_HOME}" "${XDG_CONFIG_HOME}" "${XDG_CACHE_HOME}" \
		"${XDG_STATE_HOME}" "${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() {
	if [[ ${EBUILD_PHASE} != post* ]]; then
		die "xdg_desktop_database_update must be used in pkg_post* phases."
	fi

	if ! type update-desktop-database &>/dev/null; then
		debug-print "update-desktop-database is not found"
		return
	fi

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

# @FUNCTION: xdg_icon_cache_update
# @DESCRIPTION:
# Updates icon theme cache files under /usr/share/icons.
# This function should be called from pkg_postinst and pkg_postrm.
xdg_icon_cache_update() {
	if [[ ${EBUILD_PHASE} != post* ]]; then
		die "xdg_icon_cache_update must be used in pkg_post* phases."
	fi

	if ! type gtk-update-icon-cache &>/dev/null; then
		debug-print "gtk-update-icon-cache is not found"
		return
	fi

	ebegin "Updating icons cache"
	local dir retval=0
	local fails=()
	for dir in "${EROOT%/}"/usr/share/icons/*; do
		if [[ -f ${dir}/index.theme ]]; then
			if ! gtk-update-icon-cache -qf "${dir}"; then
				debug-print "Updating cache failed on ${dir}"
				# Add to the list of failures
				fails+=("${dir}")
				retval=2
			fi
		elif [[ $(ls "${dir}") = icon-theme.cache ]]; then
			# Clear stale cache files after theme uninstallation
			rm "${dir}/icon-theme.cache"
		fi
		if [[ -z $(ls "${dir}") ]]; then
			# Clear empty theme directories after theme uninstallation
			rmdir "${dir}"
		fi
	done
	eend ${retval}
	for dir in "${fails[@]}"; do
		eerror "Failed to update cache with icon ${dir}"
	done
}

# @FUNCTION: xdg_mimeinfo_database_update
# @DESCRIPTION:
# Update the mime database.
# Creates a general list of mime types from several sources
xdg_mimeinfo_database_update() {
	if [[ ${EBUILD_PHASE} != post* ]]; then
		die "xdg_mimeinfo_database_update must be used in pkg_post* phases."
	fi

	if ! type update-mime-database &>/dev/null; then
		debug-print "update-mime-database is not found"
		return
	fi

	# https://bugs.gentoo.org/819783
	local -x PKGSYSTEM_ENABLE_FSYNC=0

	ebegin "Updating shared mime info database"
	update-mime-database "${EROOT%/}${MIMEINFO_DATABASE_DIR}"
	eend $?
}