add: chunk upload listener

library/src/main/java/com/owncloud/android/lib/resources/files/ChunkUploadListener.kt

@@ -0,0 +1,12 @@
+/*
+ * Nextcloud Android Library
+ *
+ * SPDX-FileCopyrightText: 2025 Alper Ozturk <alper.ozturk@nextcloud.com>
+ * SPDX-License-Identifier: MIT
+ */
+
+package com.owncloud.android.lib.resources.files
+
+interface ChunkUploadListener {
+    fun isCancelled(): Boolean = false
+}

library/src/main/java/com/owncloud/android/lib/resources/files/ChunkedFileUploadRemoteOperation.java

@@ -50,6 +50,7 @@ public class ChunkedFileUploadRemoteOperation extends UploadFileRemoteOperation
     private final boolean onWifiConnection;
     private String uploadFolderUri;
     private String destinationUri;
+    private ChunkUploadListener chunkUploadListener;
 
     public ChunkedFileUploadRemoteOperation(String storagePath,
                                             String remotePath,
@@ -117,6 +118,10 @@ public ChunkedFileUploadRemoteOperation(String storagePath,
         this.onWifiConnection = onWifiConnection;
     }
 
+    public void setChunkUploadListener(ChunkUploadListener listener) {
+        chunkUploadListener = listener;
+    }
+
     protected static Chunk calcNextChunk(long fileSize, int chunkId, long startByte, long chunkSize) {
         if (chunkId < 0 || String.valueOf(chunkId).length() > CHUNK_NAME_LENGTH) {
             throw new IllegalArgumentException(
@@ -198,13 +203,13 @@ protected RemoteOperationResult run(OwnCloudClient client) {
                 // determine size of next chunk
                 Chunk chunk = calcNextChunk(file.length(), ++lastId, nextByte, chunkSize);
 
-                RemoteOperationResult chunkResult = uploadChunk(client, chunk);
-                if (!chunkResult.isSuccess()) {
-                    return chunkResult;
+                if (cancellationRequested.get() || (chunkUploadListener != null && chunkUploadListener.isCancelled())) {
+                    return new RemoteOperationResult<>(new OperationCancelledException());
                 }
 
-                if (cancellationRequested.get()) {
-                    return new RemoteOperationResult(new OperationCancelledException());
+                final var chunkResult = uploadChunk(client, chunk);
+                if (!chunkResult.isSuccess()) {
+                    return chunkResult;
                 }
 
                 nextByte += chunk.getLength();