/*

     File: main.m

 Abstract: Main file to set up the service.

  Version: 1.0

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 */

#import <Foundation/Foundation.h>

#import "Fetcher.h"

// This service has one delegate object, which creates new instances of the Fetcher for each incoming connection. This is because each instance of Fetcher maintains some state for its connection.

@interface FetchServiceDelegate : NSObject <NSXPCListenerDelegate>

@end

@implementation FetchServiceDelegate

- (BOOL)listener:(NSXPCListener *)listener shouldAcceptNewConnection:(NSXPCConnection *)newConnection {

    // The exported object will implement the Fetch protocol.

    newConnection.exportedInterface = [NSXPCInterface interfaceWithProtocol:@protocol(Fetch)];

    // Note that the connection will retain its exported object, so we don't need to keep track if it in the delegate as well. Just hand it off to the connection by setting the exportedObject property.

    Fetcher *exportedFetcherObject = [Fetcher new];

    newConnection.exportedObject = exportedFetcherObject;

    // We'll take advantage of the bi-directional nature of NSXPCConnections to send progress back to the caller. The remote side of this connection should implement the FetchProgress protocol.

    newConnection.remoteObjectInterface = [NSXPCInterface interfaceWithProtocol:@protocol(FetchProgress)];

    // Let the fetcher know what connection object it should use to send back progress to the caller.

    // Note that this is a zeroing weak refernece, because the connection retains the exported object and we do not want to create a retain cycle.

    exportedFetcherObject.xpcConnection = newConnection;

    [newConnection resume];

    return YES;

}

@end

int main(int argc, const char *argv[])

{

    // Get the singleton service listener and configure it with our delegate.

    NSXPCListener *serviceListener = [NSXPCListener serviceListener];

    FetchServiceDelegate *serviceDelegate = [FetchServiceDelegate new];

    serviceListener.delegate = serviceDelegate;

    // As with the zip-service, NSXPCListener will take over the lifetime of this service when resume is called.

    [serviceListener resume];

    return 0;

}