#!/bin/sh /etc/rc.common
# Copyright (C) 2014-2016 nanpuyue <nanpuyue@gmail.com>
# Copyright (C) 2016 kuoruan <kuoruan@gmail.com>

START=99
SERVICE_WRITE_PID=1
SERVICE_DAEMONIZE=1


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

section_enabled() {
	local result
	config_get_bool result "$1" 'enabled' 0
	[ $result -eq 1 ]
}

option_disabled() {
	local result
	config_get_bool result "$1" "$2" 1
	[ $result -eq 0 ]
}

start_instance() {
	local s="$1"
	local user

	section_enabled "$s" || return 1

	config_get config_dir "$s" 'config_dir' '/var/etc/aria2'
	config_get dir "$s" 'dir'
	config_get user "$s" 'user'

	config_file="$config_dir/aria2.conf"
	session_file="$config_dir/aria2.session"
	dht_file="$config_dir/dht.dat"
	log_file="$config_dir/aria2.log"

	[ -d "$config_dir" ] || {
		mkdir -m 0755 -p "$config_dir"
		touch "$config_file"
	}

	[ -d "$dir" ] || {
		mkdir -m 0755 -p "$dir"	# create download dir
		touch "$dir"
	}

	touch "$session_file" # create session file

	echo -e "enable-rpc=true\nrpc-allow-origin-all=true\nrpc-listen-all=true\nquiet=true" > $config_file
	echo -e "continue=true\ninput-file=$session_file\nsave-session=$session_file" >> $config_file

	option_disabled "$s" 'enable_dht' || echo "dht-file-path=$dht_file" >> $config_file
	option_disabled "$s" 'enable_log' || {
		[ -f "$log_file" ] && echo > $log_file # if log file exist, clear it
                echo -e "log=$log_file" >> $config_file
        }

	# if user is set, change dir owner
	[ -z "$user" ] || {
		chown -R $user:$user $config_dir
		chown -R $user:$user $dir
	}

	append_params "$s" \
		file_allocation bt_enable_lpd enable_dht rpc_user rpc_passwd rpc_listen_port dir bt_tracker disk_cache \
		max_overall_download_limit max_overall_upload_limit max_download_limit max_upload_limit max_concurrent_downloads \
		max_connection_per_server min_split_size split save_session_interval follow_torrent listen_port bt_max_peers \
		peer_id_prefix user_agent rpc_secret log_level
	
	config_list_foreach "$s" extra_settings append_extrasettings
	
	SERVICE_UID="$user" \
	service_start /usr/bin/aria2c --conf-path="$config_file" # start service
}

append_extrasettings() {
	echo "$1" >> $config_file
}

start() {
	logger -t ARIA2C 'Starting aria2c service'
	config_load 'aria2'
	config_foreach start_instance 'aria2'
	return 0
}

stop() {
	if [ -n "`pidof aria2c`" ]; then
		logger -t ARIA2C 'Shutting down aria2c service'
		service_stop /usr/bin/aria2c
	fi
	return 0
}

restart() {
	logger -t ARIA2C 'Restarting aria2c service'
	stop
	sleep 2 # give time to shutdown
	start
}