session-android/src/org/thoughtcrime/securesms/mms/SlideDeck.java

/** 
 * Copyright (C) 2011 Whisper Systems
 * 
 * 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.thoughtcrime.securesms.mms;

import android.content.Context;

import org.thoughtcrime.securesms.crypto.MasterSecret;
import org.thoughtcrime.securesms.dom.smil.parser.SmilXmlSerializer;
import org.thoughtcrime.securesms.util.MediaUtil;
import org.thoughtcrime.securesms.util.SmilUtil;
import org.thoughtcrime.securesms.util.Util;

import java.io.ByteArrayOutputStream;
import java.io.UnsupportedEncodingException;
import java.util.LinkedList;
import java.util.List;

import ws.com.google.android.mms.ContentType;
import ws.com.google.android.mms.pdu.CharacterSets;
import ws.com.google.android.mms.pdu.PduBody;
import ws.com.google.android.mms.pdu.PduPart;

public class SlideDeck {

  private final List<Slide> slides = new LinkedList<>();

  public SlideDeck(SlideDeck copy) {
    this.slides.addAll(copy.getSlides());
  }

  public SlideDeck(Context context, MasterSecret masterSecret, PduBody body) {
    for (int i=0;i<body.getPartsNum();i++) {
      String contentType = Util.toIsoString(body.getPart(i).getContentType());
      Slide  slide       = MediaUtil.getSlideForPart(context, masterSecret, body.getPart(i), contentType);
      if (slide != null) slides.add(slide);
    }
  }

  public SlideDeck() {
  }

  public void clear() {
    slides.clear();
  }

  public PduBody toPduBody() {
    PduBody body = new PduBody();

    for (Slide slide : slides) {
      body.addPart(slide.getPart());
    }

    ByteArrayOutputStream out = new ByteArrayOutputStream();
    SmilXmlSerializer.serialize(SmilUtil.createSmilDocument(this), out);
    PduPart smilPart = new PduPart();
    smilPart.setContentId("smil".getBytes());
    smilPart.setContentLocation("smil.xml".getBytes());
    smilPart.setContentType(ContentType.APP_SMIL.getBytes());
    smilPart.setData(out.toByteArray());
    body.addPart(0, smilPart);

    return body;
  }

  public void addSlide(Slide slide) {
    slides.add(slide);
  }

  public List<Slide> getSlides() {
    return slides;
  }

  public boolean containsMediaSlide() {
    for (Slide slide : slides) {
      if (slide.hasImage() || slide.hasVideo() || slide.hasAudio()) {
        return true;
      }
    }

    return false;
  }

}