misc: fixes.

Author: ItzNotABug

dfc/src/main/java/com/lazygeniouz/dfc/controller/DocumentController.kt

@@ -64,6 +64,7 @@ internal class DocumentController(
      */
     internal fun isVirtual(): Boolean {
         if (!DocumentsContract.isDocumentUri(context, fileUri)) return false
+        if (fileCompat.documentFlags == -1) return false
 
         return fileCompat.documentFlags and flagVirtualDocument != 0
     }
@@ -106,6 +107,7 @@ internal class DocumentController(
         ) return false
 
         if (fileCompat.documentMimeType.isEmpty()) return false
+        if (fileCompat.documentFlags == -1) return false
 
         if (fileCompat.documentFlags and Document.FLAG_SUPPORTS_DELETE != 0)
             return true

dfc/src/main/java/com/lazygeniouz/dfc/file/internals/RawDocumentFileCompat.kt

@@ -119,7 +119,9 @@ internal class RawDocumentFileCompat(context: Context, var file: File) :
 
     // Return a file if exists, else **null**
     override fun findFile(name: String, ignoreCase: Boolean): DocumentFileCompat? {
-        return listFiles().firstOrNull { file -> file.name.isNotEmpty() && file.name == name }
+        return listFiles().firstOrNull { child ->
+            child.name.equals(name, ignoreCase = ignoreCase)
+        }
     }
 
     // Copies current file to the provided destination uri.

dfc/src/main/java/com/lazygeniouz/dfc/file/internals/SingleDocumentFileCompat.kt

@@ -64,7 +64,7 @@ internal class SingleDocumentFileCompat(
      *
      * @throws UnsupportedOperationException
      */
-    override fun findFile(name: String, ignoreCase: Boolean): DocumentFileCompat {
+    override fun findFile(name: String, ignoreCase: Boolean): DocumentFileCompat? {
         throw UnsupportedOperationException()
     }
 

dfc/src/main/java/com/lazygeniouz/dfc/resolver/ResolverCompat.kt

@@ -159,7 +159,12 @@ internal object ResolverCompat {
                 val documentSize = getLongOrDefault(cursor, sizeIndex)
                 val lastModifiedTime = getLongOrDefault(cursor, modifiedIndex, -1L)
                 val documentMimeType = getStringOrDefault(cursor, mimeIndex)
-                val documentFlags = getLongOrDefault(cursor, flagsIndex, -1L).toInt()
+
+                /**
+                 * Default flags to 0 (no capabilities) when not included.
+                 * Using `-1` here would make bitwise checks behave as "all flags set".
+                 */
+                val documentFlags = getLongOrDefault(cursor, flagsIndex, 0L).toInt()
 
                 TreeDocumentFileCompat(
                     context, documentUri, documentName,