DirectAppExecCommand.m

//
//  DirectAppExecCommand.m
//  Frank
//
//  Created by Martin Taylor on 4-Apr-14.
//  Copyright (c) 2014 Texas Instruments, Inc. All rights reserved.
//
//  NOTE: This code was copied directly from AppCommand.m. The only difference in this command is that the
//        RequestRouter.m executes it on the HTTP thread rather than on the main UI thread.
//
#import <Foundation/Foundation.h>
#import "DirectAppExecCommand.h"

#import "Operation.h"
#import "ViewJSONSerializer.h"
#import "FranklyProtocolHelper.h"
#import "JSON.h"

@implementation DirectAppExecCommand

- (NSString *)handleCommandWithRequestBody:(NSString *)requestBody {
	
	NSDictionary *requestCommand = FROM_JSON(requestBody);
	NSDictionary *operationDict = [requestCommand objectForKey:@"operation"];
	Operation *operation = [[[Operation alloc] initFromJsonRepresentation:operationDict] autorelease];
	
#if TARGET_OS_IPHONE
    id <UIApplicationDelegate> appDelegate = [[UIApplication sharedApplication] delegate];
#else
    id <NSApplicationDelegate> appDelegate = [[NSApplication sharedApplication] delegate];
#endif
	
	if( ![operation appliesToObject:appDelegate] )
	{
		return [FranklyProtocolHelper generateErrorResponseWithReason:@"operation doesn't apply" andDetails:@"operation does not appear to be implemented in app delegate"];
	}
	
	id result;
	
	@try {
		result = [operation applyToObject:appDelegate];
	}
	@catch (NSException *e) {
		NSLog( @"Exception while applying operation to app delegate:\n%@", e );
		return [FranklyProtocolHelper generateErrorResponseWithReason:@"exception while executing operation" andDetails:[e reason]];
	}
	
    NSMutableArray *results = [NSMutableArray new];
	[results addObject:[ViewJSONSerializer jsonify:result]];
	
	return [FranklyProtocolHelper generateSuccessResponseWithResults: results];
}

@end