fix(maccatalyst): use the correct migrations path on the Mac Catalyst platform

Fixes prisma#10 for Mac Catalyst platform, its likely the same fix will work for macOS in the future too.

Also fixes an issue when using `NSURL.absoluteString` on a path contains spaces, the spaces would
get replaced by `%20`.

Author: sandyklark

ios/Prisma.mm

@@ -16,28 +16,54 @@ @implementation Prisma
     if (cxxBridge == nil) {
         return @false;
     }
-    
+
     auto jsiRuntime = (facebook::jsi::Runtime *)cxxBridge.runtime;
     if (jsiRuntime == nil) {
         return @false;
     }
     auto &runtime = *jsiRuntime;
     auto callInvoker = _bridge.jsCallInvoker;
-    
+
     // get migrations folder
-    auto bundleURL = NSBundle.mainBundle.bundleURL;
-    auto migrations_path_absolute = [NSString stringWithFormat:@"%@%@", bundleURL.absoluteString, @"migrations"];
+    NSURL *bundleURL = NSBundle.mainBundle.bundleURL;
+#if TARGET_OS_MACCATALYST
+    NSString *migrations_path_absolute = [bundleURL.path stringByAppendingPathComponent:@"Contents/Resources/migrations"];
+    NSString *identifier = [[NSBundle mainBundle] bundleIdentifier];
+
+    // @TODO Add better error handling and reporting
+    NSURL *applicationSupport = [[NSFileManager defaultManager]    URLForDirectory: NSApplicationSupportDirectory
+                                                                        inDomain: NSUserDomainMask
+                                                                appropriateForURL: nil
+                                                                            create: YES
+                                                                            error: nil];
+
+    NSString *libraryPathAbsolute = [applicationSupport.path stringByAppendingPathComponent:identifier];
+    NSString *libraryPath = [libraryPathAbsolute stringByReplacingOccurrencesOfString:@"file://" withString:@""];
+    // @TODO Add better error handling and reporting
+    BOOL success = [[NSFileManager defaultManager]       createDirectoryAtPath: libraryPath
+                                                withIntermediateDirectories: YES
+                                                                    attributes: nil
+                                                                        error: nil];
+
+    if (!success) {
+        NSLog(@"Failed to create folder at %@", libraryPath);
+    }
+#else
+    NSString *migrations_path_absolute = [bundleURL.path stringByAppendingPathComponent:@"migrations"];
+    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, true);
+    NSString *libraryPath = [paths objectAtIndex:0];
+#endif
     auto migrations_path = [migrations_path_absolute stringByReplacingOccurrencesOfString:@"file://" withString:@""];
-   
+
     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, true);
     NSString *libraryPath = [paths objectAtIndex:0];
-    
+
 #if DEBUG
     std::cout << "▲ NSHomeDirectory:\n" << [NSHomeDirectory() UTF8String] << std::endl;
     std::cout << "▲ Library Path:\n" << [libraryPath UTF8String] << std::endl;
     std::cout << "▲ Migrations Path:\n" << [migrations_path UTF8String] << std::endl;
 #endif
-    
+
     prisma::install_cxx(runtime, callInvoker, [libraryPath UTF8String], [migrations_path UTF8String]);
     return nil;
 }