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//
// MediaServerCocoaTest_AppDelegate.m
// MediaServerCocoaTest
//
// Created by Sylvain on 9/14/10.
// Copyright Plutinosoft LLC 2010 . All rights reserved.
//
#import "MediaServerCocoaTest_AppDelegate.h"
@implementation MediaServerCocoaTest_AppDelegate
@synthesize window;
/**
Returns the support directory for the application, used to store the Core Data
store file. This code uses a directory named "MediaServerCocoaTest" for
the content, either in the NSApplicationSupportDirectory location or (if the
former cannot be found), the system's temporary directory.
*/
- (NSString *)applicationSupportDirectory {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : NSTemporaryDirectory();
return [basePath stringByAppendingPathComponent:@"MediaServerCocoaTest"];
}
/**
Creates, retains, and returns the managed object model for the application
by merging all of the models found in the application bundle.
*/
- (NSManagedObjectModel *)managedObjectModel {
if (managedObjectModel) return managedObjectModel;
managedObjectModel = [[NSManagedObjectModel mergedModelFromBundles:nil] retain];
return managedObjectModel;
}
/**
Returns the persistent store coordinator for the application. This
implementation will create and return a coordinator, having added the
store for the application to it. (The directory for the store is created,
if necessary.)
*/
- (NSPersistentStoreCoordinator *) persistentStoreCoordinator {
if (persistentStoreCoordinator) return persistentStoreCoordinator;
NSManagedObjectModel *mom = [self managedObjectModel];
if (!mom) {
NSAssert(NO, @"Managed object model is nil");
NSLog(@"%@:%s No model to generate a store from", [self class], _cmd);
return nil;
}
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *applicationSupportDirectory = [self applicationSupportDirectory];
NSError *error = nil;
if ( ![fileManager fileExistsAtPath:applicationSupportDirectory isDirectory:NULL] ) {
if (![fileManager createDirectoryAtPath:applicationSupportDirectory withIntermediateDirectories:NO attributes:nil error:&error]) {
NSAssert(NO, ([NSString stringWithFormat:@"Failed to create App Support directory %@ : %@", applicationSupportDirectory,error]));
NSLog(@"Error creating application support directory at %@ : %@",applicationSupportDirectory,error);
return nil;
}
}
NSURL *url = [NSURL fileURLWithPath: [applicationSupportDirectory stringByAppendingPathComponent: @"storedata"]];
persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: mom];
if (![persistentStoreCoordinator addPersistentStoreWithType:NSXMLStoreType
configuration:nil
URL:url
options:nil
error:&error]){
[[NSApplication sharedApplication] presentError:error];
[persistentStoreCoordinator release], persistentStoreCoordinator = nil;
return nil;
}
return persistentStoreCoordinator;
}
/**
Returns the managed object context for the application (which is already
bound to the persistent store coordinator for the application.)
*/
- (NSManagedObjectContext *) managedObjectContext {
if (managedObjectContext) return managedObjectContext;
NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
if (!coordinator) {
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
[dict setValue:@"Failed to initialize the store" forKey:NSLocalizedDescriptionKey];
[dict setValue:@"There was an error building up the data file." forKey:NSLocalizedFailureReasonErrorKey];
NSError *error = [NSError errorWithDomain:@"YOUR_ERROR_DOMAIN" code:9999 userInfo:dict];
[[NSApplication sharedApplication] presentError:error];
return nil;
}
managedObjectContext = [[NSManagedObjectContext alloc] init];
[managedObjectContext setPersistentStoreCoordinator: coordinator];
return managedObjectContext;
}
/**
Returns the NSUndoManager for the application. In this case, the manager
returned is that of the managed object context for the application.
*/
- (NSUndoManager *)windowWillReturnUndoManager:(NSWindow *)window {
return [[self managedObjectContext] undoManager];
}
/**
Performs the save action for the application, which is to send the save:
message to the application's managed object context. Any encountered errors
are presented to the user.
*/
- (IBAction) saveAction:(id)sender {
NSError *error = nil;
if (![[self managedObjectContext] commitEditing]) {
NSLog(@"%@:%s unable to commit editing before saving", [self class], _cmd);
}
if (![[self managedObjectContext] save:&error]) {
[[NSApplication sharedApplication] presentError:error];
}
}
/**
Implementation of the applicationShouldTerminate: method, used here to
handle the saving of changes in the application managed object context
before the application terminates.
*/
- (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender {
if (!managedObjectContext) return NSTerminateNow;
if (![managedObjectContext commitEditing]) {
NSLog(@"%@:%s unable to commit editing to terminate", [self class], _cmd);
return NSTerminateCancel;
}
if (![managedObjectContext hasChanges]) return NSTerminateNow;
NSError *error = nil;
if (![managedObjectContext save:&error]) {
// This error handling simply presents error information in a panel with an
// "Ok" button, which does not include any attempt at error recovery (meaning,
// attempting to fix the error.) As a result, this implementation will
// present the information to the user and then follow up with a panel asking
// if the user wishes to "Quit Anyway", without saving the changes.
// Typically, this process should be altered to include application-specific
// recovery steps.
BOOL result = [sender presentError:error];
if (result) return NSTerminateCancel;
NSString *question = NSLocalizedString(@"Could not save changes while quitting. Quit anyway?", @"Quit without saves error question message");
NSString *info = NSLocalizedString(@"Quitting now will lose any changes you have made since the last successful save", @"Quit without saves error question info");
NSString *quitButton = NSLocalizedString(@"Quit anyway", @"Quit anyway button title");
NSString *cancelButton = NSLocalizedString(@"Cancel", @"Cancel button title");
NSAlert *alert = [[NSAlert alloc] init];
[alert setMessageText:question];
[alert setInformativeText:info];
[alert addButtonWithTitle:quitButton];
[alert addButtonWithTitle:cancelButton];
NSInteger answer = [alert runModal];
[alert release];
alert = nil;
if (answer == NSAlertAlternateReturn) return NSTerminateCancel;
}
return NSTerminateNow;
}
/**
Implementation of dealloc, to release the retained variables.
*/
- (void)dealloc {
[window release];
[managedObjectContext release];
[persistentStoreCoordinator release];
[managedObjectModel release];
[super dealloc];
}
@end
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