android: Convert DirectoryInitialization to Kotlin

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/DirectoryInitialization.java

@@ -1,72 +0,0 @@
-package org.yuzu.yuzu_emu.utils;
-
-import android.content.Context;
-import android.content.Intent;
-import androidx.localbroadcastmanager.content.LocalBroadcastManager;
-
-import org.yuzu.yuzu_emu.NativeLibrary;
-
-import java.io.IOException;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-public final class DirectoryInitialization {
-    public static final String BROADCAST_ACTION = "org.yuzu.yuzu_emu.BROADCAST";
-    public static final String EXTRA_STATE = "directoryState";
-    private static volatile DirectoryInitializationState directoryState = null;
-    private static String userPath;
-    private static AtomicBoolean isDirectoryInitializationRunning = new AtomicBoolean(false);
-
-    public static void start(Context context) {
-        // Can take a few seconds to run, so don't block UI thread.
-        ((Runnable) () -> init(context)).run();
-    }
-
-    private static void init(Context context) {
-        if (!isDirectoryInitializationRunning.compareAndSet(false, true))
-            return;
-
-        if (directoryState != DirectoryInitializationState.YUZU_DIRECTORIES_INITIALIZED) {
-            initializeInternalStorage(context);
-            NativeLibrary.InitializeEmulation();
-            directoryState = DirectoryInitializationState.YUZU_DIRECTORIES_INITIALIZED;
-        }
-
-        isDirectoryInitializationRunning.set(false);
-        sendBroadcastState(directoryState, context);
-    }
-
-    public static boolean areDirectoriesReady() {
-        return directoryState == DirectoryInitializationState.YUZU_DIRECTORIES_INITIALIZED;
-    }
-
-    public static String getUserDirectory() {
-        if (directoryState == null) {
-            throw new IllegalStateException("DirectoryInitialization has to run at least once!");
-        } else if (isDirectoryInitializationRunning.get()) {
-            throw new IllegalStateException(
-                    "DirectoryInitialization has to finish running first!");
-        }
-        return userPath;
-    }
-
-    public static void initializeInternalStorage(Context context) {
-        try {
-            userPath = context.getExternalFilesDir(null).getCanonicalPath();
-            NativeLibrary.SetAppDirectory(userPath);
-        } catch(IOException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private static void sendBroadcastState(DirectoryInitializationState state, Context context) {
-        Intent localIntent =
-                new Intent(BROADCAST_ACTION)
-                        .putExtra(EXTRA_STATE, state);
-        LocalBroadcastManager.getInstance(context).sendBroadcast(localIntent);
-    }
-
-    public enum DirectoryInitializationState {
-        YUZU_DIRECTORIES_INITIALIZED,
-        CANT_FIND_EXTERNAL_STORAGE
-    }
-}

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/DirectoryInitialization.kt

@@ -0,0 +1,66 @@
+package org.yuzu.yuzu_emu.utils
+
+import android.content.Context
+import android.content.Intent
+import androidx.localbroadcastmanager.content.LocalBroadcastManager
+import org.yuzu.yuzu_emu.NativeLibrary
+import java.io.IOException
+import java.util.concurrent.atomic.AtomicBoolean
+
+object DirectoryInitialization {
+    const val BROADCAST_ACTION = "org.yuzu.yuzu_emu.BROADCAST"
+    const val EXTRA_STATE = "directoryState"
+
+    @Volatile
+    private var directoryState: DirectoryInitializationState? = null
+    private var userPath: String? = null
+    private val isDirectoryInitializationRunning = AtomicBoolean(false)
+
+    @JvmStatic
+    fun start(context: Context) {
+        // Can take a few seconds to run, so don't block UI thread.
+        Runnable { init(context) }.run()
+    }
+
+    private fun init(context: Context) {
+        if (!isDirectoryInitializationRunning.compareAndSet(false, true)) return
+        if (directoryState != DirectoryInitializationState.YUZU_DIRECTORIES_INITIALIZED) {
+            initializeInternalStorage(context)
+            NativeLibrary.InitializeEmulation()
+            directoryState = DirectoryInitializationState.YUZU_DIRECTORIES_INITIALIZED
+        }
+        isDirectoryInitializationRunning.set(false)
+        sendBroadcastState(directoryState, context)
+    }
+
+    fun areDirectoriesReady(): Boolean {
+        return directoryState == DirectoryInitializationState.YUZU_DIRECTORIES_INITIALIZED
+    }
+
+    val userDirectory: String?
+        get() {
+            checkNotNull(directoryState) { "DirectoryInitialization has to run at least once!" }
+            check(!isDirectoryInitializationRunning.get()) { "DirectoryInitialization has to finish running first!" }
+            return userPath
+        }
+
+    private fun initializeInternalStorage(context: Context) {
+        try {
+            userPath = context.getExternalFilesDir(null)!!.canonicalPath
+            NativeLibrary.SetAppDirectory(userPath)
+        } catch (e: IOException) {
+            e.printStackTrace()
+        }
+    }
+
+    private fun sendBroadcastState(state: DirectoryInitializationState?, context: Context) {
+        val localIntent = Intent(BROADCAST_ACTION)
+            .putExtra(EXTRA_STATE, state)
+        LocalBroadcastManager.getInstance(context).sendBroadcast(localIntent)
+    }
+
+    enum class DirectoryInitializationState {
+        YUZU_DIRECTORIES_INITIALIZED,
+        CANT_FIND_EXTERNAL_STORAGE
+    }
+}