content: /**
   * Copyright 2010-present Facebook.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.facebook;
  
  import android.os.Handler;
  
  import java.io.FilterOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.util.Map;
  
  class ProgressOutputStream extends FilterOutputStream implements RequestOutputStream {
      private final Map<Request, RequestProgress> progressMap;
      private final RequestBatch requests;
      private final long threshold;
  
      private long batchProgress, lastReportedProgress, maxProgress;
      private RequestProgress currentRequestProgress;
  
      ProgressOutputStream(OutputStream out, RequestBatch requests, Map<Request, RequestProgress> progressMap, long maxProgress) {
          super(out);
          this.requests = requests;
          this.progressMap = progressMap;
          this.maxProgress = maxProgress;
  
          this.threshold = Settings.getOnProgressThreshold();
      }
  
      private void addProgress(long size) {
          if (currentRequestProgress != null) {
              currentRequestProgress.addProgress(size);
          }
  
          batchProgress += size;
  
          if (batchProgress >= lastReportedProgress + threshold || batchProgress >= maxProgress) {
              reportBatchProgress();
          }
      }
  
      private void reportBatchProgress() {
          if (batchProgress > lastReportedProgress) {
              for (RequestBatch.Callback callback : requests.getCallbacks()) {
                  if (callback instanceof RequestBatch.OnProgressCallback) {
                      final Handler callbackHandler = requests.getCallbackHandler();
  
                      // Keep copies to avoid threading issues
                      final RequestBatch.OnProgressCallback progressCallback = (RequestBatch.OnProgressCallback) callback;
                      if (callbackHandler == null) {
                          progressCallback.onBatchProgress(requests, batchProgress, maxProgress);
                      }
                      else {
                          callbackHandler.post(new Runnable() {
                              @Override
                              public void run() {
                                  progressCallback.onBatchProgress(requests, batchProgress, maxProgress);
                              }
                          });
                      }
                  }
              }
  
              lastReportedProgress = batchProgress;
          }
      }
  
      public void setCurrentRequest(Request request) {
          currentRequestProgress = request != null? progressMap.get(request) : null;
      }
  
      long getBatchProgress() {
          return batchProgress;
      }
  
      long getMaxProgress() {
          return maxProgress;
      }
  
      @Override
      public void write(byte[] buffer) throws IOException {
          out.write(buffer);
          addProgress(buffer.length);
      }
  
      @Override
      public void write(byte[] buffer, int offset, int length) throws IOException {
          out.write(buffer, offset, length);
          addProgress(length);
      }
  
      @Override
      public void write(int oneByte) throws IOException {
          out.write(oneByte);
          addProgress(1);
      }
  
      @Override
      public void close() throws IOException {
          super.close();
  
          for (RequestProgress p : progressMap.values()) {
              p.reportProgress();
          }
  
          reportBatchProgress();
      }
  }
  