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/*
* This file is part of GNU Taler
* (C) 2021 Taler Systems S.A.
*
* GNU Taler 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, or (at your option) any later version.
*
* GNU Taler 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
* GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import Foundation
protocol IonoMessageHandler {
func handleMessage(message: String)
}
func notification_callback(payload: Optional<UnsafePointer<Int8>>,
userdata: Optional<UnsafeMutableRawPointer>) {
let native = Unmanaged<Iono>.fromOpaque(userdata!).takeUnretainedValue()
let string = String(cString: payload!)
native.internalOnNotify(payload: string)
}
class Iono {
var instance: OpaquePointer!
var work_queue: DispatchQueue
var initialization_group: DispatchGroup
var messageHandler: IonoMessageHandler?
init() {
work_queue = DispatchQueue(label: "NodeQueue", qos: .userInitiated)
initialization_group = DispatchGroup()
initialization_group.notify(queue: work_queue) {
self.instance = __initNative()
__setNotifyHandler(self.instance, notification_callback, Unmanaged.passUnretained(self).toOpaque())
}
}
deinit {
__destroyNative(instance)
}
private func scheduleNodeThreadAsync(block: @escaping () -> Void) {
initialization_group.wait()
work_queue.async(execute: block)
notifyNative()
}
private func scheduleNodeThreadSync(block: @escaping () -> Void) {
initialization_group.wait()
work_queue.sync(execute: block)
notifyNative()
}
func internalOnNotify(payload: String) {
if let handler = messageHandler {
handler.handleMessage(message: payload)
}
}
func notifyNative() {
initialization_group.wait()
__notifyNative(instance)
}
func evalSimpleJs(source: String) -> String {
var result: String?
scheduleNodeThreadSync {
let cResult = __evalJs(self.instance, source.cString(using: .utf8))
if let cStr = cResult {
result = String(cString: cStr)
free(cResult)
}
}
return result!
}
func evalNodeCode(source: String) {
scheduleNodeThreadAsync {
__makeCallbackNative(self.instance, source.cString(using: .utf8))
}
}
func sendMessage(message: String) {
let encoded = message.data(using: .utf8)!.base64EncodedString()
let source = """
if (global.__iono_onMessage) {
const msg = (new Buffer('\(encoded)', 'base64')).toString('ascii');
global.__iono_onMessage(msg);
} else {
console.log("WARN: no __iono_onMessage defined");
}
"""
evalNodeCode(source: source)
}
func waitStopped() {
}
func putModuleCode(modName: String, code: String) {
__putModuleCodeNative(instance, modName.cString(using: .utf8),
code.cString(using: .utf8))
}
}
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