Add init & extract storage directory path creation

Author: reilem

ios/RNCAsyncStorage.m

@@ -66,17 +66,23 @@ static void RCTAppendError(NSDictionary *error, NSMutableArray<NSDictionary *> *
   return nil;
 }
 
+static NSString *RCTCreateStorageDirectoryPath(NSString *storageDir) {
+  NSString *storageDirectoryPath;
+#if TARGET_OS_TV
+  storageDirectoryPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).firstObject;
+#else
+  storageDirectoryPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
+#endif
+  storageDirectoryPath = [storageDirectoryPath stringByAppendingPathComponent:RCTStorageDirectory];
+  return storageDirectoryPath;
+}
+
 static NSString *RCTGetStorageDirectory()
 {
   static NSString *storageDirectory = nil;
   static dispatch_once_t onceToken;
   dispatch_once(&onceToken, ^{
-#if TARGET_OS_TV
-    storageDirectory = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).firstObject;
-#else
-    storageDirectory = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject;
-#endif
-    storageDirectory = [storageDirectory stringByAppendingPathComponent:RCTStorageDirectory];
+    storageDirectory = RCTCreateStorageDirectoryPath(RCTStorageDirectory);
   });
   return storageDirectory;
 }
@@ -156,6 +162,12 @@ static dispatch_queue_t RCTGetMethodQueue()
   return error ? RCTMakeError(@"Failed to delete storage directory.", error, nil) : nil;
 }
 
+static void RCTPerformDirectoryMigrationCheck() {
+//  NSString *oldRCTStorageDirectory = @"RNCAsyncLocalStorage_V1";
+//  NSString *storageDir = RCTCreateStorageDirectoryPath(oldRCTStorageDirectory);
+//  printf("%s%s\n", "TESTING: ", [storageDir UTF8String]);
+}
+
 #pragma mark - RNCAsyncStorage
 
 @implementation RNCAsyncStorage
@@ -167,6 +179,19 @@ @implementation RNCAsyncStorage
   NSMutableDictionary<NSString *, NSString *> *_manifest;
 }
 
++ (BOOL)requiresMainQueueSetup {
+  return YES;
+}
+
+- (instancetype)init
+{
+  if (!(self = [super init])) {
+    return nil;
+  }
+  RCTPerformDirectoryMigrationCheck();
+  return self;
+}
+
 RCT_EXPORT_MODULE()
 
 - (dispatch_queue_t)methodQueue
@@ -371,7 +396,7 @@ - (NSDictionary *)_writeEntry:(NSArray<NSString *> *)entry changedManifest:(BOOL
 }
 
 RCT_EXPORT_METHOD(multiMerge:(NSArray<NSArray<NSString *> *> *)kvPairs
-                    callback:(RCTResponseSenderBlock)callback)
+                  callback:(RCTResponseSenderBlock)callback)
 {
   NSDictionary *errorOut = [self _ensureSetup];
   if (errorOut) {
@@ -456,3 +481,4 @@ - (NSDictionary *)_writeEntry:(NSArray<NSString *> *)entry changedManifest:(BOOL
 }
 
 @end
+