#!/bin/sh /etc/rc.common
# Copyright (C) 2010-2015 OpenWrt.org

START=99
USE_PROCD=1

LIST_SEP="
"

append_params() {
	local p; local v; local s="$1"; shift
	for p in "$@"; do
		config_get v "$s" "$p"
		IFS="$LIST_SEP"
		for v in $v; do
			[ -n "$v" ] && (
				echo "\"$p\": $v," | sed -e 's|_|-|g' >> $config_file
			)
		done
		unset IFS
	done
}

append_params_quotes() {
	local p; local v; local s="$1"; shift
	for p in "$@"; do
		config_get v "$s" "$p"
		IFS="$LIST_SEP"
		for v in $v; do
			[ -n "$v" ] && (
				echo -n "\"$p" | sed -e 's|/|\\/|g;s|_|-|g' >> $config_file; \
				echo "\": \"$v\"," >> $config_file
			)
		done
		unset IFS
	done
}

section_enabled() {
	config_get_bool enabled "$1" enabled 0
	[ $enabled -gt 0 ]
}

transmission() {
	local cfg="$1"
	local USE

	local user
	local group
	local config_overwrite
	local download_dir config_dir
	local mem_percentage
	local nice
	local cmdline

	section_enabled "$section" || return 1

	config_get config_dir "$cfg" 'config_dir' '/var/etc/transmission'
	config_get user "$cfg" 'user'
	config_get group "$cfg" 'group'
	config_get download_dir "$cfg" 'download_dir' '/var/etc/transmission'
	config_get mem_percentage "$cfg" 'mem_percentage' '50'
	config_get config_overwrite "$cfg" config_overwrite 1
	config_get nice "$cfg" nice 0

	local MEM=$(sed -ne 's!^MemTotal:[[:space:]]*\([0-9]*\) kB$!\1!p' /proc/meminfo)
	if test "$MEM" -gt 1;then
		USE=$(expr $MEM \* $mem_percentage \* 10)
	fi

	config_file="$config_dir/settings.json"
	[ -d $config_dir ] || {
		mkdir -p $config_dir
		chmod 0755 $config_dir
		touch $config_file
		[ -z "$user" ] || chown -R "$user:$group" $config_dir
	}

	[ "$config_overwrite" == 0 ] || {

		echo "{" > $config_file

		append_params "$cfg" \
			alt_speed_down alt_speed_enabled alt_speed_time_begin alt_speed_time_day \
			alt_speed_time_enabled alt_speed_time_end alt_speed_up blocklist_enabled \
			cache_size_mb download_queue_enabled download_queue_size \
			dht_enabled encryption idle_seeding_limit idle_seeding_limit_enabled \
			incomplete_dir_enabled lazy_bitfield_enabled lpd_enabled message_level \
			peer_limit_global peer_limit_per_torrent peer_port \
			peer_port_random_high peer_port_random_low peer_port_random_on_start \
			pex_enabled port_forwarding_enabled preallocation prefetch_enabled \
			ratio_limit ratio_limit_enabled rename_partial_files rpc_authentication_required \
			rpc_enabled rpc_port rpc_whitelist_enabled queue_stalled_enabled \
			queue_stalled_minutes scrape_paused_torrents_enabled script_torrent_done_enabled \
			seed_queue_enabled seed_queue_size \
			speed_limit_down speed_limit_down_enabled speed_limit_up \
			speed_limit_up_enabled start_added_torrents trash_original_torrent_files \
			umask upload_slots_per_torrent utp_enabled scrape_paused_torrents \
			watch_dir_enabled rpc_host_whitelist_enabled

		append_params_quotes "$cfg" \
			blocklist_url bind_address_ipv4 bind_address_ipv6 download_dir incomplete_dir \
			peer_congestion_algorithm peer_socket_tos rpc_bind_address rpc_password rpc_url \
			rpc_username rpc_host_whitelist rpc_whitelist script_torrent_done_filename watch_dir

		echo "\"invalid-key\": false" >> $config_file
		echo "}" >> $config_file

	}

	cmdline="transmission-daemon -g $config_dir -f"
	procd_open_instance
	procd_set_param command $cmdline
	procd_set_param env CURL_CA_BUNDLE=/etc/ssl/certs/ca-certificates.crt
	procd_set_param user $user
	procd_set_param group $group
	procd_set_param nice $nice
	procd_set_param respawn retry=60

	if test -z $USE; then
		procd_set_param limits core="0 0"
	else
		procd_set_param limits core="0 0" as="$USE $USE"
		logger -t transmission "Starting with $USE virt mem"
	fi

	procd_add_jail transmission log
	procd_add_jail_mount $config_file
	procd_add_jail_mount_rw $download_dir
	procd_close_instance
}

start_service() {
	config_load 'transmission'
	config_foreach transmission 'transmission'
}