/*
    BEEM is a videoconference application on the Android Platform.

    Copyright (C) 2009 by Frederic-Charles Barthelery,
                          Jean-Manuel Da Silva,
                          Nikita Kozlov,
                          Philippe Lago,
                          Jean Baptiste Vergely,
                          Vincent Veronis.

    This file is part of BEEM.

    BEEM 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.

    BEEM 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 BEEM.  If not, see <http://www.gnu.org/licenses/>.

    Please send bug reports with examples or suggestions to
    contact@beem-project.com or http://dev.beem-project.com/

    Epitech, hereby disclaims all copyright interest in the program "Beem"
    written by Frederic-Charles Barthelery,
               Jean-Manuel Da Silva,
               Nikita Kozlov,
               Philippe Lago,
               Jean Baptiste Vergely,
               Vincent Veronis.

    Nicolas Sadirac, November 26, 2009
    President of Epitech.

    Flavien Astraud, November 26, 2009
    Head of the EIP Laboratory.

*/
package com.beem.project.beem.service;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.ContentResolver;
import android.content.Context;

import android.database.Cursor;

import android.net.Uri;
import android.provider.OpenableColumns;

import com.beem.project.beem.providers.AvatarProvider;
import com.beem.project.beem.smack.avatar.AvatarCache;


/**
 * An implementation of an AvatarCache which store the data of the filesystem.
 */
public class BeemAvatarCache implements AvatarCache {

    private static final String TAG = BeemAvatarCache.class.getSimpleName();

    private Context mContext;
    private ContentResolver mContentResolver;

    /**
     * Create a BeemAvatarCache.
     *
     * @param ctx The android context of the cache.
     */
    public BeemAvatarCache(final Context ctx) {
	mContext = ctx;
	mContentResolver = mContext.getContentResolver();
    }


    @Override
    public void put(String key, byte[] data) throws IOException {
	Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
	OutputStream os = new BufferedOutputStream(mContentResolver.openOutputStream(uri));
	try {
	    os.write(data);
	} finally {
	    os.close();
	}
    }

    @Override
    public void put(String key, InputStream in) throws IOException {
	Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
	OutputStream os = new BufferedOutputStream(mContentResolver.openOutputStream(uri));
	try {
	    byte[] data = new byte[1024];
	    int nbread;
	    while ((nbread = in.read(data)) != -1)
		    os.write(data, 0, nbread);
	} finally {
	    in.close();
	    os.close();
	}
    }

    @Override
    public byte[] get(String key) throws IOException {
	Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
	InputStream is = new BufferedInputStream(mContentResolver.openInputStream(uri));
	ByteArrayOutputStream bos = new ByteArrayOutputStream();
	try {
	    byte[] data = new byte[1024];
	    is.read(data);
	    bos.write(data);
	} finally {
	    is.close();
	}
	return bos.toByteArray();
    }

    @Override
    public boolean contains(String key) {
	Uri uri = AvatarProvider.CONTENT_URI.buildUpon().appendPath(key).build();
	Cursor c = mContentResolver.query(uri, null, null, null, null);
	boolean res = false;
	if (c.moveToNext()) {
	    int sizeIdx = c.getColumnIndex(OpenableColumns.SIZE);
	    long size = c.getLong(sizeIdx);
	    res = size > 0;
	}
	c.close();
	return res;
    }
}
