TabFS/extension/safari/TabFS/TabFS Extension/SafariWebExtensionHandler.swift

//
//  SafariWebExtensionHandler.swift
//  TabFS Extension
//
//  Created by Omar Rizwan on 1/31/21.
//

import SafariServices
import os.log

class SafariWebExtensionHandler: NSObject, NSExtensionRequestHandling {
    
	func beginRequest(with context: NSExtensionContext) {
        
        os_log(.default, "TabFSmsg Received message from browser.runtime.sendNativefffMessage: %@", context as! CVarArg)
        
        let item = context.inputItems[0] as! NSExtensionItem
        
        os_log(.default, "TabFSmsg item.userInfo %{public}@", item.userInfo as! CVarArg)
        guard let message = item.userInfo?["message"] as? [AnyHashable: Any] else { return }
        
        if message["op"] as! String == "safari_did_connect" {
            os_log(.default, "TabFSmsg sdc")
            
            // The XPC service is a subprocess that lives outside the macOS App Sandbox.
            // It can do forbidden things like spawn tabfs filesystem and set up WebSocket server.
            
            let connection = NSXPCConnection(serviceName: "com.rsnous.TabFSService")
            
            connection.remoteObjectInterface = NSXPCInterface(with: TabFSServiceProtocol.self)
            
            connection.resume()
            
            let service = connection.remoteObjectProxyWithErrorHandler { error in
                os_log(.default, "Received error:  %{public}@", error as! CVarArg)
            } as? TabFSServiceProtocol
            
            // need this one XPC call to actually initialize the service
            service?.upperCaseString("hello XPC") { response in
                os_log(.default, "Response from XPC service:  %{public}@", response)
                
                // FIXME: report port back?
                let response = NSExtensionItem()
                response.userInfo = [ "message": [ "aResponse to": "moop" ] ]
                context.completeRequest(returningItems: [response]) { (what) in
                    print(what)
                }
            }
            
            return
        }
    }
    
}