# Mgmt
# Copyright (C) James Shubin and the project contributors
# Written by James Shubin <james@shubin.ca> and the project contributors
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#
# Additional permission under GNU GPL version 3 section 7
#
# If you modify this program, or any covered work, by linking or combining it
# with embedded mcl code and modules (and that the embedded mcl code and
# modules which link with this program, contain a copy of their source code in
# the authoritative form) containing parts covered by the terms of any other
# license, the licensors of this program grant you additional permission to
# convey the resulting work. Furthermore, the licensors of this program grant
# the original author, James Shubin, additional permission to update this
# additional permission if he deems it necessary to achieve the goals of this
# additional permission.

import "deploy"
import "golang"
import "golang/strconv" as golang_strconv
import "local"
import "os"
import "strings"

class base() {
	$vardir = local.vardir("cups/")

	pkg "cups" {
		state => "installed",

		Before => File["/etc/cups/"],
	}

	file "/etc/cups/" {
		state => $const.res.file.state.exists,
		recurse => false, # not completely managed!
		purge => false, # not completely managed!
		owner => "root",
		group => "lp", # TODO: debian?
		mode => "u=rwx,go=rx", # dir
	}

	file "/etc/cups/printers.conf" {
		state => $const.res.file.state.exists,
		fragments => [
			"${vardir}printers.conf.header", # also pull this one file
			"${vardir}printers.d/", # pull from this dir
		],
		owner => "root",
		group => "lp",
		mode => "u=rw,go=",

		Before => Exec["restorecon"],
		Notify => Svc["cups"],
	}

	exec "restorecon" {
		cmd => "/usr/sbin/restorecon -rv /etc/cups/",
		# XXX: make some magic snippets which turn into ./mgmt snippet <type> /etc/cups/ (for example) and get substituted in here!
		# XXX: or even better, instead of snippets which exec mgmt stuff, they turn into pure golang equivalents...
		#ifcmd => "mgmt:changed /etc/cups/", # XXX: implement this
		#watchcmd => "mgmt:dir /etc/cups/", # XXX: implement this
	}

	svc "cups" {
		state => "running",
		startup => "enabled",
	}
}

class base:printer_base() {
	file "${vardir}printers.d/" {
		state => $const.res.file.state.exists,
		recurse => true,
		purge => true,
		owner => "root",
		group => "root",
		mode => "u=rwx,go=", # dir
	}

	file "${vardir}printers.conf.header" {
		state => $const.res.file.state.exists,
		content => deploy.readfile("/files/printers.conf.header"), # static, no template!
		owner => "root",
		group => "root",
		mode => "u=rw,go=",
	}
}

class base:printer($name, $st) {
	$default = $st->default || false
	$info = $st->info || ""
	$location = $st->location || ""
	$makemodel = $st->makemodel || ""
	$uri str = $st->uri
	$ppd str = $st->ppd

	$comment = $st->comment || ""

	include printer_base

	$index = local.pool("cups-printer", $name) # the uid will always return the same int
	# XXX: implement local.pool_max("cups-printer") to use for NextPrinterId

	panic($index < 0 or $index > 65535) # 0xffffh is the maximum
	$hex = strings.left_pad(golang_strconv.format_int($index, 16), "0", 4)
	$tail = strings.substr($hex, 0, 4) # TODO: support $hex[0] or $hex[0:4] ?
	$uuid = "01234567-89ab-cdef-0000-00000000${tail}"

	$tmpl = struct{
		name => $name,
		id => $index, # it just has to be constant and unique
		uuid => $uuid,
		default => $default,
		info => $info,
		location => $location,
		makemodel => $makemodel,
		uri => $uri,
		#ppd => $ppd,
		comment => $comment,
	}

	$content = golang.template(deploy.readfile("/files/printer.conf.tmpl"), $tmpl)
	#$f = os.readfile("${vardir}printers.d/${name}") # XXX: replace with something.stateok() ???
	#if $f != $content {
	#	# XXX: stop the svc... then change the file, then start it up again...
	#	# XXX: might need a flag so that we stop the svc for multiples of these all in the same place...
	#}

	file "${vardir}printers.d/${name}" {
		state => $const.res.file.state.exists,
		content => $content,
		owner => "root",
		group => "root",
		mode => "u=rw,go=",
	}

	file "/etc/cups/ppd/${name}.ppd" {
		state => $const.res.file.state.exists,
		# TODO: build a file "handle" system for bigger data
		content => $ppd,
		#source => $ppd,
		owner => "root",
		group => "lp",
		mode => "u=rw,g=r,o=",

		Before => Exec["restorecon"],
		Notify => Svc["cups"],
	}

	if $default {
		# there can only be one!
		# if more than one of these is set on the same machine we'd error
		file "${vardir}default" {
			state => $const.res.file.state.exists,
			content => "${name}",
			owner => "root",
			group => "root",
			mode => "u=rw,go=",
		}
	}
}