[Sandbox / Core Data] Refine global variable usage

Refine the global variable usage, eliminating double underscore prefixes
and trusting that static global variables will exist in the object where
the class was created. Got rid of that nasty NSApplication extension
hack that was previously in use.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>

Playlist/PlaylistController.h

@@ -19,10 +19,6 @@
 @class SpotlightWindowController;
 @class PlaybackController;
 
-@interface NSApplication (CoreDataStorageExtension)
-- (NSPersistentContainer *_Nonnull)sharedPersistentContainer;
-@end
-
 typedef NS_ENUM(NSInteger, RepeatMode) {
 	RepeatModeNoRepeat = 0,
 	RepeatModeRepeatOne,
@@ -69,7 +65,6 @@ typedef NS_ENUM(NSInteger, URLOrigin) {
 @property(retain) NSString *_Nullable totalTime;
 @property(retain) NSString *_Nullable currentStatus;
 
-@property(strong, nonatomic, readonly) NSOperationQueue *_Nonnull persistentContainerQueue;
 @property(strong, nonatomic, readonly) NSPersistentContainer *_Nonnull persistentContainer;
 @property(strong, nonatomic, readonly) NSMutableDictionary<NSString *, AlbumArtwork *> *_Nonnull persistentArtStorage;
 
@@ -139,6 +134,8 @@ typedef NS_ENUM(NSInteger, URLOrigin) {
 - (void)readQueueFromDataStore;
 - (void)readShuffleListFromDataStore;
 
++ (NSPersistentContainer *_Nonnull)sharedPersistentContainer;
+
 // reload metadata of selection
 - (IBAction)reloadTags:(id _Nullable)sender;
 

Playlist/PlaylistController.m

@@ -27,13 +27,7 @@
 
 extern BOOL kAppControllerShuttingDown;
 
-NSPersistentContainer *__persistentContainer = nil;
+NSPersistentContainer *kPersistentContainer = nil;
-
-@implementation NSApplication (CoreDataStorageExtension)
-- (NSPersistentContainer *_Nonnull)sharedPersistentContainer {
-	return __persistentContainer;
-}
-@end
 
 @implementation PlaylistController
 
@@ -43,7 +37,7 @@ NSPersistentContainer *__persistentContainer = nil;
 
 static NSArray *cellIdentifiers = nil;
 
-NSMutableDictionary<NSString *, AlbumArtwork *> *__artworkDictionary = nil;
+NSMutableDictionary<NSString *, AlbumArtwork *> *kArtworkDictionary = nil;
 
 static void *playlistControllerContext = &playlistControllerContext;
 
@@ -126,16 +120,20 @@ static void *playlistControllerContext = &playlistControllerContext;
 		}
 	}];
 
-	__persistentContainer = self.persistentContainer;
+	kPersistentContainer = self.persistentContainer;
 
 	self.persistentContainer.viewContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy;
 
 	_persistentArtStorage = [[NSMutableDictionary alloc] init];
-	__artworkDictionary = self.persistentArtStorage;
+	kArtworkDictionary = self.persistentArtStorage;
 
 	return self;
 }
 
++ (NSPersistentContainer *)sharedPersistentContainer {
+	return kPersistentContainer;
+}
+
 - (void)awakeFromNib {
 	[super awakeFromNib];
 

Playlist/PlaylistEntry.m

@@ -16,8 +16,8 @@
 #import "SHA256Digest.h"
 #import "SecondsFormatter.h"
 
-extern NSPersistentContainer *__persistentContainer;
+extern NSPersistentContainer *kPersistentContainer;
-extern NSMutableDictionary<NSString *, AlbumArtwork *> *__artworkDictionary;
+extern NSMutableDictionary<NSString *, AlbumArtwork *> *kArtworkDictionary;
 
 @implementation PlaylistEntry (Extension)
 
@@ -344,7 +344,7 @@ extern NSMutableDictionary<NSString *, AlbumArtwork *> *__artworkDictionary;
 @dynamic albumArtInternal;
 - (NSData *)albumArtInternal {
 	NSString *imageCacheTag = self.artHash;
-	return [__artworkDictionary objectForKey:imageCacheTag].artData;
+	return [kArtworkDictionary objectForKey:imageCacheTag].artData;
 }
 
 - (void)setAlbumArtInternal:(NSData *)albumArtInternal {
@@ -354,12 +354,12 @@ extern NSMutableDictionary<NSString *, AlbumArtwork *> *__artworkDictionary;
 
 	self.artHash = imageCacheTag;
 
-	if(![__artworkDictionary objectForKey:imageCacheTag]) {
+	if(![kArtworkDictionary objectForKey:imageCacheTag]) {
-		AlbumArtwork *art = [NSEntityDescription insertNewObjectForEntityForName:@"AlbumArtwork" inManagedObjectContext:__persistentContainer.viewContext];
+		AlbumArtwork *art = [NSEntityDescription insertNewObjectForEntityForName:@"AlbumArtwork" inManagedObjectContext:kPersistentContainer.viewContext];
 		art.artHash = imageCacheTag;
 		art.artData = albumArtInternal;
 
-		[__artworkDictionary setObject:art forKey:imageCacheTag];
+		[kArtworkDictionary setObject:art forKey:imageCacheTag];
 	}
 }
 
@@ -505,7 +505,7 @@ NSURL *_Nullable urlForPath(NSString *_Nullable path) {
 	request.predicate = predicate;
 
 	NSError *error = nil;
-	NSArray *results = [__persistentContainer.viewContext executeFetchRequest:request error:&error];
+	NSArray *results = [kPersistentContainer.viewContext executeFetchRequest:request error:&error];
 
 	if(!results || [results count] < 1) {
 		NSPredicate *filenamePredicate = [NSPredicate predicateWithFormat:@"filename == %@", self.filename];
@@ -513,7 +513,7 @@ NSURL *_Nullable urlForPath(NSString *_Nullable path) {
 		request = [NSFetchRequest fetchRequestWithEntityName:@"PlayCount"];
 		request.predicate = filenamePredicate;
 
-		results = [__persistentContainer.viewContext executeFetchRequest:request error:&error];
+		results = [kPersistentContainer.viewContext executeFetchRequest:request error:&error];
 	}
 
 	if(!results || [results count] < 1) return nil;

Playlist/PlaylistLoader.m

@@ -41,7 +41,7 @@
 
 @import Firebase;
 
-extern NSMutableDictionary<NSString *, AlbumArtwork *> *__artworkDictionary;
+extern NSMutableDictionary<NSString *, AlbumArtwork *> *kArtworkDictionary;
 
 @implementation PlaylistLoader
 
@@ -839,7 +839,7 @@ NSURL *_Nullable urlForPath(NSString *_Nullable path);
 		}
 
 		for(AlbumArtwork *art in results) {
-			[__artworkDictionary setObject:art forKey:art.artHash];
+			[kArtworkDictionary setObject:art forKey:art.artHash];
 		}
 
 		request = [NSFetchRequest fetchRequestWithEntityName:@"PlaylistEntry"];

Preferences/Preferences/SandboxPathBehaviorController.m

@@ -29,8 +29,7 @@
 	NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"path" ascending:YES];
 	[self setSortDescriptors:@[sortDescriptor]];
 
-	if([NSApp respondsToSelector:@selector(sharedPersistentContainer)]) {
+	NSPersistentContainer *pc = [NSClassFromString(@"PlaylistController") sharedPersistentContainer];
-		NSPersistentContainer *pc = [NSApp sharedPersistentContainer];
 
 	NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"SandboxToken"];
 
@@ -49,7 +48,6 @@
 			[self addObject:@{ @"path": token.path, @"valid": (isStale ? NSLocalizedPrefString(@"ValidNo") : NSLocalizedPrefString(@"ValidYes")) }];
 		}
 	}
-	}
 }
 
 - (void)addUrl:(NSURL *)url {
@@ -60,10 +58,7 @@
 		return;
 	}
 
-	if(![NSApp respondsToSelector:@selector(sharedPersistentContainer)])
+	NSPersistentContainer *pc = [NSClassFromString(@"PlaylistController") sharedPersistentContainer];
-		return;
-
-	NSPersistentContainer *pc = [NSApp sharedPersistentContainer];
 
 	SandboxToken *token = [NSEntityDescription insertNewObjectForEntityForName:@"SandboxToken" inManagedObjectContext:pc.viewContext];
 
@@ -81,10 +76,7 @@
 }
 
 - (void)removePath:(NSString *)path {
-	if(![NSApp respondsToSelector:@selector(sharedPersistentContainer)])
+	NSPersistentContainer *pc = [NSClassFromString(@"PlaylistController") sharedPersistentContainer];
-		return;
-
-	NSPersistentContainer *pc = [NSApp sharedPersistentContainer];
 
 	NSPredicate *predicate = [NSPredicate predicateWithFormat:@"path == %@", path];
 

Spotlight/SpotlightPlaylistEntry.m

@@ -13,7 +13,7 @@
 // with format (entryKey, transformerName)
 static NSDictionary *importKeys;
 
-extern NSPersistentContainer *__persistentContainer;
+extern NSPersistentContainer *kPersistentContainer;
 
 @implementation SpotlightPlaylistEntry
 
@@ -41,7 +41,7 @@ extern NSPersistentContainer *__persistentContainer;
 }
 
 + (PlaylistEntry *)playlistEntryWithMetadataItem:(NSMetadataItem *)metadataItem {
-	PlaylistEntry *entry = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:__persistentContainer.viewContext];
+	PlaylistEntry *entry = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:kPersistentContainer.viewContext];
 
 	entry.deLeted = YES;
 

Utils/SQLiteStore.m

@@ -14,7 +14,7 @@
 
 #import "SHA256Digest.h"
 
-extern NSPersistentContainer *__persistentContainer;
+extern NSPersistentContainer *kPersistentContainer;
 
 NSString *getDatabasePath(void) {
 	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
@@ -1443,7 +1443,7 @@ static SQLiteStore *g_sharedStore = nil;
 #endif
 
 - (PlaylistEntry *_Nonnull)getTrack:(int64_t)trackId {
-	PlaylistEntry *entry = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:__persistentContainer.viewContext];
+	PlaylistEntry *entry = [NSEntityDescription insertNewObjectForEntityForName:@"PlaylistEntry" inManagedObjectContext:kPersistentContainer.viewContext];
 
 	if(trackId < 0) {
 		entry.error = YES;
@@ -1863,7 +1863,7 @@ static SQLiteStore *g_sharedStore = nil;
 			entry.index = index;
 			entry.entryId = entryId;
 		} else {
-			[__persistentContainer.viewContext deleteObject:entry];
+			[kPersistentContainer.viewContext deleteObject:entry];
 			entry = nil;
 		}
 	}

Utils/SandboxBroker.m

@@ -17,17 +17,7 @@
 
 #import "PlaylistController.h"
 
-static SandboxBroker *__sharedSandboxBroker = nil;
+static SandboxBroker *kSharedSandboxBroker = nil;
-
-@interface NSApplication (SandboxBrokerExtension)
-- (SandboxBroker *)sharedSandboxBroker;
-@end
-
-@implementation NSApplication (SandboxBrokerExtension)
-- (SandboxBroker *)sharedSandboxBroker {
-	return __sharedSandboxBroker;
-}
-@end
 
 static NSURL *urlWithoutFragment(NSURL *u) {
 	if(![u isFileURL]) return u;
@@ -111,9 +101,13 @@ static NSURL *urlWithoutFragment(NSURL *u) {
 + (id)sharedSandboxBroker {
 	static dispatch_once_t onceToken;
 	dispatch_once(&onceToken, ^{
-		__sharedSandboxBroker = [[self alloc] init];
+		kSharedSandboxBroker = [[self alloc] init];
 	});
-	return [NSApp sharedSandboxBroker];
+	return kSharedSandboxBroker;
+}
+
++ (NSPersistentContainer *)sharedPersistentContainer {
+	return [NSClassFromString(@"PlaylistController") sharedPersistentContainer];
 }
 
 - (id)init {
@@ -156,7 +150,7 @@ static NSURL *urlWithoutFragment(NSURL *u) {
 		}
 	}
 
-	NSPersistentContainer *pc = [NSApp sharedPersistentContainer];
+	NSPersistentContainer *pc = [SandboxBroker sharedPersistentContainer];
 
 	NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"path.length" ascending:NO];
 
@@ -196,7 +190,6 @@ static NSURL *urlWithoutFragment(NSURL *u) {
 - (const void *)beginFolderAccess:(NSURL *)fileUrl {
 	NSURL *folderUrl = [urlWithoutFragment(fileUrl) URLByDeletingLastPathComponent];
 	if(![folderUrl isFileURL]) return NULL;
-	if(![NSApp respondsToSelector:@selector(sharedPersistentContainer)]) return NULL;
 
 	SandboxEntry *entry;