/*

     File: LocationsAppDelegate.m

 Abstract: Application delegate to set up the Core Data stack and configure the view and navigation controllers.

  Version: 1.1

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 MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION

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 */

#import "LocationsAppDelegate.h"

#import "RootViewController.h"

@implementation LocationsAppDelegate

@synthesize window;

@synthesize navigationController;

#pragma mark -

#pragma mark Application lifecycle

- (void)applicationDidFinishLaunching:(UIApplication *)application {

    // Configure and show the window.

    RootViewController *rootViewController = [[RootViewController alloc] initWithStyle:UITableViewStylePlain];

    NSManagedObjectContext *context = [self managedObjectContext];

    if (!context) {

        // Handle the error.

    }

    rootViewController.managedObjectContext = context;

    UINavigationController *aNavigationController = [[UINavigationController alloc] initWithRootViewController:rootViewController];

    self.navigationController = aNavigationController;

    [window addSubview:[navigationController view]];

    [window makeKeyAndVisible];

    [rootViewController release];

    [aNavigationController release];

}

/**

 applicationWillTerminate: saves changes in the application's managed object context before the application terminates.

 */

- (void)applicationWillTerminate:(UIApplication *)application {

    NSError *error;

    if (managedObjectContext != nil) {

        if ([managedObjectContext hasChanges] && ![managedObjectContext save:&error]) {

            // Handle the error.

        } 

    }

}

#pragma mark -

#pragma mark Saving

/**

 Performs the save action for the application, which is to send the save:

 message to the application's managed object context.

 */

- (IBAction)saveAction:(id)sender {

    NSError *error;

    if (![[self managedObjectContext] save:&error]) {

        // Handle error

    }

}

#pragma mark -

#pragma mark Core Data stack

/**

 Returns the managed object context for the application.

 If the context doesn't already exist, it is created and bound to the persistent store coordinator for the application.

 */

- (NSManagedObjectContext *) managedObjectContext {

    if (managedObjectContext != nil) {

        return managedObjectContext;

    }

    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];

    if (coordinator != nil) {

        managedObjectContext = [[NSManagedObjectContext alloc] init];

        [managedObjectContext setPersistentStoreCoordinator: coordinator];

    }

    return managedObjectContext;

}

/**

 Returns the managed object model for the application.

 If the model doesn't already exist, it is created by merging all of the models found in the application bundle.

 */

- (NSManagedObjectModel *)managedObjectModel {

    if (managedObjectModel != nil) {

        return managedObjectModel;

    }

    managedObjectModel = [[NSManagedObjectModel mergedModelFromBundles:nil] retain];    

    return managedObjectModel;

}

/**

 Returns the persistent store coordinator for the application.

 If the coordinator doesn't already exist, it is created and the application's store added to it.

 */

- (NSPersistentStoreCoordinator *)persistentStoreCoordinator {

    if (persistentStoreCoordinator != nil) {

        return persistentStoreCoordinator;

    }

    NSURL *storeUrl = [NSURL fileURLWithPath: [[self applicationDocumentsDirectory] stringByAppendingPathComponent: @"Locations.sqlite"]];

    NSError *error;

    persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectModel]];

    if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:nil error:&error]) {

        // Handle the error.

    }    

    return persistentStoreCoordinator;

}

#pragma mark -

#pragma mark Application's documents directory

/**

 Returns the path to the application's documents directory.

 */

- (NSString *)applicationDocumentsDirectory {

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;

    return basePath;

}

#pragma mark -

#pragma mark Memory management

- (void)dealloc {

    [managedObjectContext release];

    [managedObjectModel release];

    [persistentStoreCoordinator release];

    [navigationController release];

    [window release];

    [super dealloc];

}

@end