Fixed renamed file

app/src/main/java/xyz/quaver/pupil/ui/fragment/SettingsFragment.kt

@@ -150,7 +150,12 @@ class SettingsFragment :
                 "backup" -> {
                     File(ContextCompat.getDataDir(context), "favorites.json").copyTo(
                         context,
-                        getDownloadDirectory(context).createFile("null", "favorites.json")!!
+                        getDownloadDirectory(context).let {
+                            if (it.findFile("favorites.json") != null)
+                                it
+                            else
+                                it.createFile("null", "favorites.json")!!
+                        }
                     )
 
                     Snackbar.make(this@SettingsFragment.listView, R.string.settings_backup_snackbar, Snackbar.LENGTH_LONG)

app/src/main/java/xyz/quaver/pupil/util/download/Cache.kt

@@ -206,7 +206,12 @@ class Cache(context: Context) : ContextWrapper(context) {
         if (!Regex("""^[0-9]+.+$""").matches(name))
             throw IllegalArgumentException("File name is not a number")
 
-        cache.createFile("null", name)?.writeBytes(this, data)
+        cache.let {
+            if (it.findFile(name) != null)
+                it
+            else
+                it.createFile("null", name)
+        }?.writeBytes(this, data)
     }
 
     fun moveToDownload(galleryID: Int) {

app/src/main/java/xyz/quaver/pupil/util/file.kt

@@ -104,12 +104,17 @@ fun DocumentFile.copyRecursively(
     if (!exists())
         throw Exception("The source file doesn't exist.")
 
-    if (this.isFile)
-        target.createFile("null", name!!)!!.writeBytes(
+    if (this.isFile) {
+        target.let {
+            if (it.findFile(name!!) != null)
+                it
+            else
+                createFile("null", name!!)!!
+        }.writeBytes(
             context,
             readBytes(context)
         )
-    else if (this.isDirectory) {
+    } else if (this.isDirectory) {
         target.createDirectory(name!!).also { newTarget ->
             listFiles().forEach { child ->
                 child.copyRecursively(context, newTarget!!)

app/src/main/java/xyz/quaver/pupil/util/update.kt

@@ -146,7 +146,12 @@ fun checkUpdate(context: AppCompatActivity, force: Boolean = false) {
                 }
 
                 CoroutineScope(Dispatchers.IO).launch io@{
-                    val target = getDownloadDirectory(context)?.createFile("null", "Pupil.apk")!!
+                    val target = getDownloadDirectory(context).let {
+                        if (it.findFile("Pupil.apk") != null)
+                            it
+                        else
+                            it.createFile("null", "Pupil.apk")!!
+                    }
 
                     try {
                         URL(url).download(context, target) { progress, fileSize ->