1 files changed, 113 insertions, 0 deletions
diff --git a/src/eu/siacs/conversations/persistance/FileBackend.java b/src/eu/siacs/conversations/persistance/FileBackend.java
new file mode 100644
index 00000000..f7f986f2
--- /dev/null
+++ b/src/eu/siacs/conversations/persistance/FileBackend.java
@@ -0,0 +1,113 @@
+package eu.siacs.conversations.persistance;
+
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+import android.util.LruCache;
+
+import eu.siacs.conversations.entities.Conversation;
+import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.xmpp.jingle.JingleFile;
+
+public class FileBackend {
+
+	private static int IMAGE_SIZE = 1920;
+
+	private Context context;
+	private LruCache<String, Bitmap> thumbnailCache;
+
+	public FileBackend(Context context) {
+		this.context = context;
+		
+		int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
+		int cacheSize = maxMemory / 8;
+		thumbnailCache = new LruCache<String, Bitmap>(cacheSize) {
+			@Override
+			protected int sizeOf(String key, Bitmap bitmap) {
+				return bitmap.getByteCount() / 1024;
+			}
+		};
+
+	}
+
+	public JingleFile getJingleFile(Message message) {
+		Conversation conversation = message.getConversation();
+		String prefix = context.getFilesDir().getAbsolutePath();
+		String path = prefix + "/" + conversation.getAccount().getJid() + "/"
+				+ conversation.getContactJid();
+		String filename = message.getUuid() + ".webp";
+		return new JingleFile(path + "/" + filename);
+	}
+	
+	private Bitmap resize(Bitmap originalBitmap, int size) {
+		int w = originalBitmap.getWidth();
+		int h = originalBitmap.getHeight();
+		if (Math.max(w, h) > size) {
+			int scalledW;
+			int scalledH;
+			if (w <= h) {
+				scalledW = (int) (w / ((double) h / size));
+				scalledH = size;
+			} else {
+				scalledW = size;
+				scalledH = (int) (h / ((double) w / size));
+			}
+			Bitmap scalledBitmap = Bitmap.createScaledBitmap(
+					originalBitmap, scalledW, scalledH, true);
+			return scalledBitmap;
+		} else {
+			return originalBitmap;
+		}
+	}
+
+	public JingleFile copyImageToPrivateStorage(Message message, Uri image) {
+		try {
+			InputStream is = context.getContentResolver()
+					.openInputStream(image);
+			JingleFile file = getJingleFile(message);
+			file.getParentFile().mkdirs();
+			file.createNewFile();
+			OutputStream os = new FileOutputStream(file);
+			Bitmap originalBitmap = BitmapFactory.decodeStream(is);
+			is.close();
+			Bitmap scalledBitmap = resize(originalBitmap, IMAGE_SIZE);
+			boolean success = scalledBitmap.compress(Bitmap.CompressFormat.WEBP,75,os);
+			if (!success) {
+				//Log.d("xmppService", "couldnt compress");
+			}
+			os.close();
+			return file;
+		} catch (FileNotFoundException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		} catch (IOException e) {
+			// TODO Auto-generated catch block
+			e.printStackTrace();
+		}
+
+		return null;
+	}
+
+	public Bitmap getImageFromMessage(Message message) {
+		return BitmapFactory
+				.decodeFile(getJingleFile(message).getAbsolutePath());
+	}
+
+	public Bitmap getThumbnailFromMessage(Message message, int size) {
+		Bitmap thumbnail = thumbnailCache.get(message.getUuid());
+		if (thumbnail==null) {
+			Bitmap fullsize = BitmapFactory.decodeFile(getJingleFile(message)
+					.getAbsolutePath());
+			thumbnail = resize(fullsize, size);
+			this.thumbnailCache.put(message.getUuid(), thumbnail);
+		}
+		return thumbnail;
+	}
+}