Add media upload progress. Closes #412 (#426)

app/src/main/java/com/keylesspalace/tusky/network/ProgressRequestBody.java

@@ -0,0 +1,78 @@
+/* Copyright 2017 Andrew Dawson
+ *
+ * This file is a part of Tusky.
+ *
+ * This program is free software; you can redistribute it and/or modify it under the terms of the
+ * GNU General Public License as published by the Free Software Foundation; either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
+ * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with Tusky; if not,
+ * see <http://www.gnu.org/licenses>. */
+
+package com.keylesspalace.tusky.network;
+
+import android.support.annotation.NonNull;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+
+import okhttp3.MediaType;
+import okhttp3.RequestBody;
+import okio.BufferedSink;
+
+public final class ProgressRequestBody extends RequestBody {
+    private final byte[] content;
+    private final UploadCallback mListener;
+    private final MediaType mediaType;
+    private boolean shouldIgnoreThisPass;
+
+    private static final int DEFAULT_BUFFER_SIZE = 2048;
+
+    public interface UploadCallback {
+        void onProgressUpdate(int percentage);
+    }
+
+    public ProgressRequestBody(final byte[] content, final MediaType mediaType, boolean shouldIgnoreFirst, final UploadCallback listener) {
+        this.content = content;
+        this.mediaType = mediaType;
+        mListener = listener;
+        shouldIgnoreThisPass = shouldIgnoreFirst;
+    }
+
+    @Override
+    public MediaType contentType() {
+        return mediaType;
+    }
+
+    @Override
+    public long contentLength() throws IOException {
+        return content.length;
+    }
+
+    @Override
+    public void writeTo(@NonNull BufferedSink sink) throws IOException {
+        long length = content.length;
+
+        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
+        ByteArrayInputStream in = new ByteArrayInputStream(content);
+        long uploaded = 0;
+
+        try {
+            int read;
+            while ((read = in.read(buffer)) != -1) {
+                if (!shouldIgnoreThisPass) {
+                    mListener.onProgressUpdate((int)(100 * uploaded / length));
+                }
+                uploaded += read;
+                sink.write(buffer, 0, read);
+            }
+        } finally {
+            in.close();
+        }
+        shouldIgnoreThisPass = false;
+    }
+}