added settings menu and persistent storage for settings

Limelight/Database/DataManager.m

@@ -0,0 +1,65 @@
+//
+//  DataManager.m
+//  Limelight
+//
+//  Created by Diego Waxemberg on 10/28/14.
+//  Copyright (c) 2014 Limelight Stream. All rights reserved.
+//
+
+#import "DataManager.h"
+
+@implementation DataManager
+static NSInteger DEFAULT_BITRATE = 10000;
+static NSInteger DEFAULT_FRAMERATE = 60;
+static NSInteger DEFAULT_HEIGHT = 720;
+static NSInteger DEFAULT_WIDTH = 1280;
+
+- (id) init {
+    self = [super init];
+    self.appDelegate = [[UIApplication sharedApplication] delegate];
+    return self;
+}
+
+- (void) saveSettingsWithBitrate:(NSInteger)bitrate framerate:(NSInteger)framerate height:(NSInteger)height width:(NSInteger)width {
+    Settings* settingsToSave = [self retrieveSettings];
+    settingsToSave.framerate = [NSNumber numberWithInteger:framerate];
+    settingsToSave.bitrate = [NSNumber numberWithInteger:bitrate];
+    settingsToSave.height = [NSNumber numberWithInteger:height];
+    settingsToSave.width = [NSNumber numberWithInteger:width];
+    [self saveSettings:settingsToSave];
+}
+
+- (Settings*) retrieveSettings {
+    NSFetchRequest* fetchRequest = [[NSFetchRequest alloc] init];
+    NSEntityDescription* entity = [NSEntityDescription entityForName:@"Settings" inManagedObjectContext:[self.appDelegate managedObjectContext]];
+    [fetchRequest setEntity:entity];
+    [fetchRequest setAffectedStores:[NSArray arrayWithObjects:[[self.appDelegate persistentStoreCoordinator] persistentStoreForURL:[self.appDelegate getStoreURL]], nil]];
+    
+    NSError* error;
+    NSArray* fetchedRecords = [[self.appDelegate managedObjectContext] executeFetchRequest:fetchRequest error:&error];
+    
+    if (fetchedRecords.count == 0) {
+        // create a new settings object with the default values
+        Settings* settings = [[Settings alloc] initWithEntity:entity insertIntoManagedObjectContext:[self.appDelegate managedObjectContext]];
+        settings.framerate = [NSNumber numberWithInteger:DEFAULT_FRAMERATE];
+        settings.bitrate = [NSNumber numberWithInteger:DEFAULT_BITRATE];
+        settings.height = [NSNumber numberWithInteger:DEFAULT_HEIGHT];
+        settings.width = [NSNumber numberWithInteger:DEFAULT_WIDTH];
+        return settings;
+    } else {
+        // we should only ever have 1 settings object stored
+        return [fetchedRecords objectAtIndex:0];
+    }
+}
+
+- (void) saveSettings:(Settings*)settings {
+    NSError* error;
+    if (![[self.appDelegate managedObjectContext] save:&error]) {
+        NSLog(@"ERROR: Unable to save settings to database");
+    }
+    
+    [self.appDelegate saveContext];
+}
+
+
+@end