# Copyright 1999-2016 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Id$

EAPI=6

SSL_CERT_MANDATORY=1

inherit eutils pam rebar ssl-cert systemd

DESCRIPTION="Robust, scalable and extensible XMPP server"
HOMEPAGE="http://www.ejabberd.im/ https://github.com/processone/ejabberd/"
SRC_URI="http://www.process-one.net/downloads/${PN}/${PV}/${P}.tgz
	-> ${P}.tar.gz"

LICENSE="GPL-2"
SLOT="0"
KEYWORDS="~amd64 ~arm ~ia64 ~ppc ~sparc ~x86"
REQUIRED_USE="mssql? ( odbc )"
# TODO: Add 'tools' flag.
IUSE="captcha debug full-xml hipe ldap mssql mysql nls odbc pam postgres redis
	riak roster-gw sqlite zlib"

RESTRICT="test"

# TODO: Add dependencies for 'tools' flag enabled.
# TODO: tools? (
# TODO: 	>=dev-erlang/meck-0.8.4
# TODO: 	>=dev-erlang/moka-1.0.5b
# TODO: )
CDEPEND="
	>=dev-erlang/cache_tab-1.0.2
	>=dev-erlang/esip-1.0.4
	>=dev-erlang/fast_tls-1.0.3
	>=dev-erlang/fast_xml-1.1.3
	>=dev-erlang/fast_yaml-1.0.3
	>=dev-erlang/jiffy-0.14.7
	>=dev-erlang/lager-3.0.2
	>=dev-erlang/luerl-0.2
	>=dev-erlang/p1_oauth2-0.6.1
	>=dev-erlang/p1_utils-1.0.4
	>=dev-erlang/p1_xmlrpc-1.15.1
	>=dev-erlang/stringprep-1.0.3
	>=dev-erlang/stun-1.0.3
	>=dev-lang/erlang-17.1[hipe?,odbc?,ssl]
	>=net-im/jabber-base-0.01
	ldap? ( =net-nds/openldap-2* )
	mysql? ( >=dev-erlang/p1_mysql-1.0.1 )
	nls? ( >=dev-erlang/iconv-1.0.0 )
	odbc? ( dev-db/unixODBC )
	pam? ( >=dev-erlang/p1_pam-1.0.0 )
	postgres? ( >=dev-erlang/p1_pgsql-1.1.0 )
	redis? ( >=dev-erlang/eredis-1.0.8 )
	riak? (
		>=dev-erlang/hamcrest-0.1.0_p20150103
		>=dev-erlang/riakc-2.1.1_p20151111
	)
	sqlite? ( >=dev-erlang/sqlite3-1.1.5 )
	zlib? ( >=dev-erlang/ezlib-1.0.1 )"
DEPEND="${CDEPEND}
	>=sys-apps/gawk-4.1"
RDEPEND="${CDEPEND}
	captcha? ( media-gfx/imagemagick[truetype,png] )"

PATCHES=( "${FILESDIR}/${P}-ejabberdctl.patch" )

EJABBERD_CERT="${EPREFIX}/etc/ssl/ejabberd/server.pem"
# Paths in net-im/jabber-base
JABBER_ETC="${EPREFIX}/etc/jabber"
JABBER_LOG="${EPREFIX}/var/log/jabber"
JABBER_SPOOL="${EPREFIX}/var/spool/jabber"

# Adjust example configuration file to Gentoo.
# - Use our sample certificates.
# - Correct PAM service name.
adjust_config() {
	sed -e "s|\"/path/to/ssl.pem\"|\"${EJABBERD_CERT}\"|g" \
		-e "s|\"pamservicename\"|\"xmpp\"|" \
		-i "${S}/ejabberd.yml.example" \
		|| die 'failed to adjust example config'
}

# Set paths to ejabberd lib directory consistently to point always to directory
# suffixed with version.
correct_ejabberd_paths() {
	sed -e "/^EJABBERDDIR[[:space:]]*=/{s:ejabberd:${P}:}" \
		-i "${S}/Makefile.in" \
		|| die 'failed to set ejabberd path in Makefile.in'
	sed -e "/EJABBERD_BIN_PATH=/{s:ejabberd:${P}:}" \
		-i "${S}/ejabberdctl.template" \
		|| die 'failed to set ejabberd path in ejabberdctl.template'
	sed -e 's|\(captcha_cmd:[[:space:]]*"\).\+"|\1'$(get_ejabberd_path)'/priv/bin/captcha.sh"|' \
		-i "${S}/ejabberd.yml.example" \
		|| die 'failed to correct path to captcha.sh in example config'
}

# Get epam-wrapper from 'files' directory and correct path to lib directory in
# it. epam-wrapper is placed into work directory. It is assumed no epam-wrapper
# file exists there already.
customize_epam_wrapper() {
	local epam_wrapper_src="$1"
	local epam_wrapper_dst="${S}/epam-wrapper"

	[[ -e ${epam_wrapper_dst} ]] && die 'epam-wrapper already exists'
	sed -r -e "s@^(ERL_LIBS=).*\$@\1${EPREFIX}$(get_erl_libs)@" \
		"${epam_wrapper_src}" >"${epam_wrapper_dst}" \
		|| die 'failed to install epam-wrapper'
}

# Check if there already exists a certificate.
ejabberd_cert_exists() {
	local cert

	for cert in $(gawk -- \
			'match($0, /^[[:space:]]*certfile: "([^"]+)"/, m) {print m[1];}' \
			"${EROOT}${JABBER_ETC}/ejabberd.yml"); do
		[[ -f ${cert} ]] && return 0
	done

	return 1
}

# Generate and install sample ejabberd certificate. It's installed into
# EJABBERD_CERT path.
ejabberd_cert_install() {
	SSL_ORGANIZATION="${SSL_ORGANIZATION:-ejabberd XMPP Server}"
	install_cert "${EJABBERD_CERT%.*}"
	chown root:jabber "${EROOT}${EJABBERD_CERT}" || die
	chmod 0440 "${EROOT}${EJABBERD_CERT}" || die
}

# Get path to ejabberd lib directory.
get_ejabberd_path() {
	echo "$(get_erl_libs)/${P}"
}

# Make ejabberd.service for systemd from upstream provided template.
make_ejabberd_service() {
	sed -r \
		-e 's!@ctlscriptpath@!/usr/sbin!' \
		-e 's!(User|Group)=(.*)!\1=jabber!' \
		"${PN}.service.template" >"${PN}.service" \
		|| die 'failed to make ejabberd.service'
}

# Set paths to defined by net-im/jabber-base.
set_jabberbase_paths() {
	sed -e "/^ETCDIR[[:space:]]*=/{s:@sysconfdir@/ejabberd:${JABBER_ETC}:}" \
		-e "/^LOGDIR[[:space:]]*=/{s:@localstatedir@/log/ejabberd:${JABBER_LOG}:}" \
		-e "/^SPOOLDIR[[:space:]]*=/{s:@localstatedir@/lib/ejabberd:${JABBER_SPOOL}:}" \
		-i "${S}/Makefile.in" \
		|| die 'failed to set paths in Makefile.in'
	sed -e "s|\(ETC_DIR=\){{sysconfdir}}.*|\1${JABBER_ETC}|" \
		-e "s|\(LOGS_DIR=\){{localstatedir}}.*|\1${JABBER_LOG}|" \
		-e "s|\(SPOOL_DIR=\){{localstatedir}}.*|\1${JABBER_SPOOL}|" \
		-i "${S}/ejabberdctl.template" \
		|| die 'failed to set paths ejabberdctl.template'
}

# Skip installing docs because it's only COPYING that's installed by Makefile.
skip_docs() {
	gawk -i inplace '
/# Documentation/, /^[[:space:]]*#?[[:space:]]*$/ {
	if ($0 ~ /^[[:space:]]*#?[[:space:]]*$/) {
		print $0;
	} else {
		next;
	}
}
1
' "${S}/Makefile.in" || die 'failed to remove docs section from Makefile.in'
}

src_prepare() {
	default

	rebar_remove_deps
	correct_ejabberd_paths
	set_jabberbase_paths
	make_ejabberd_service
	skip_docs
	adjust_config
	customize_epam_wrapper "${FILESDIR}/epam-wrapper"
}

src_configure() {
	econf \
		--docdir="${EPREFIX}/usr/share/doc/${PF}/html" \
		--libdir="${EPREFIX}$(get_erl_libs)" \
		--enable-user=jabber \
		$(use_enable debug) \
		$(use_enable full-xml) \
		$(use_enable hipe) \
		$(use_enable mssql) \
		$(use_enable mysql) \
		$(use_enable nls iconv) \
		$(use_enable odbc) \
		$(use_enable pam) \
		$(use_enable postgres pgsql) \
		$(use_enable redis) \
		$(use_enable riak) \
		$(use_enable roster-gw roster-gateway-workaround) \
		$(use_enable sqlite) \
		$(use_enable zlib)
}

src_compile() {
	emake REBAR='rebar -v' src
}

src_install() {
	default

	if use pam; then
		local epam_path="$(get_ejabberd_path)/priv/bin/epam"

		pamd_mimic_system xmpp auth account || die "cannot create pam.d file"
		into "$(get_ejabberd_path)/priv"
		newbin epam-wrapper epam
		# PAM helper module permissions
		# https://www.process-one.net/docs/ejabberd/guide_en.html#pam
		fperms 4750 "${epam_path}"
		fowners root:jabber "${epam_path}"
	fi

	newconfd "${FILESDIR}/${PN}-3.confd" "${PN}"
	newinitd "${FILESDIR}/${PN}-3.initd" "${PN}"
	systemd_dounit "${PN}.service"
	systemd_dotmpfilesd "${FILESDIR}/${PN}.tmpfiles.conf"

	insinto /etc/logrotate.d
	newins "${FILESDIR}/${PN}.logrotate" "${PN}"
}

pkg_postinst() {
	if [[ ! ${REPLACING_VERSIONS} ]]; then
		elog "For configuration instructions, please see"
		elog "  /usr/share/doc/${PF}/html/guide.html"
		elog "or the online version at"
		elog "  http://www.process-one.net/en/ejabberd/docs/"
	elif [[ -f ${EROOT}etc/jabber/ejabberd.cfg ]]; then
		elog "Ejabberd now defaults to using a YAML format for its config file."
		elog "The old ejabberd.cfg file can be converted using the following instructions:"
		echo
		elog "1. Make sure all processes related to the previous version of ejabberd aren't"
		elog "   running. Usually this just means the ejabberd and epmd daemons and possibly"
		elog "   the pam-related process (epam) if pam support is enabled."
		elog "2. Run \`ejabberdctl start\` with sufficient permissions. Note that this can"
		elog "   fail to start ejabberd properly for various reasons. Check ejabberd's main"
		elog "   log file at /var/log/jabber/ejabberd.log to confirm it started successfully."
		elog "3. Run"
		elog "     \`ejabberdctl convert_to_yaml /etc/jabber/ejabberd.cfg /etc/jabber/ejabberd.yml.new\`"
		elog "   with sufficient permissions, edit and rename /etc/jabber/ejabberd.yml.new to"
		elog "   /etc/jabber/ejabberd.yml, and finally restart ejabberd with the new config"
		elog "   file."
		echo
	fi

	if ! ejabberd_cert_exists; then
		ejabberd_cert_install
	fi
}