HTD/mobile/src/main/java/htdinc/howtodrink/DataBase/DataBaseOpenHelper.java

package htdinc.howtodrink.DataBase;

import android.content.Context;
import android.content.SharedPreferences;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.preference.PreferenceManager;
import android.util.Log;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Locale;

/**
 * Created by RUDY on 31/05/2016.
 */
public class DataBaseOpenHelper extends SQLiteOpenHelper{

    private static final String DATABASE_NAME = "HTDDatane.sqlite";
    private static final int DATABASE_VERSION = 1;
    private static final String SP_KEY_DB_VER = "db_ver";
    private final Context mContext;

    // Nom de la table
    public static final String BAR_TABLE_NAME = "BAR";

    // Description des colonnes
    public static final String COLUMN_IDBAR = "IDBAR";
    public static final int NUM_COLUMN_IDBAR = 0;
    public static final String COLUMN_NAMEBAR = "NAMEBAR";
    public static final int NUM_COLUMN_NAMEBAR = 1;
    public static final String COLUMN_NOTEBAR = "NOTEBAR";
    public static final int NUM_COLUMN_NOTEBAR = 2;
    public static final String COLUMN_ADDRESSBAR = "ADDRESSBAR";
    public static final int NUM_COLUMN_ADDRESSBAR = 3;
    public static final String COLUMN_GPSLOCATIONLATITUDEBAR = "GPSLOCATIONLATITUDEBAR";
    public static final int NUM_COLUMN_GPSLOCATIONLATITUDEBAR = 4;
    public static final String COLUMN_GPSLOCATIONLONGITUDEBAR = "GPSLOCATIONLONGITUDEBAR";
    public static final int NUM_COLUMN_GPSLOCATIONLONGITUDEBAR = 5;

    // Nom de la table
    public static final String CATEGORY_TABLE_NAME = "CATEGORY";

    // Description des colonnes
    public static final String COLUMN_IDCATEGORY = "IDCATEGORY";
    public static final int NUM_COLUMN_IDCATEGORY = 0;
    public static final String COLUMN_NAMECATEGORY = "NAMECATEGORY";
    public static final int NUM_COLUMN_NAMECATEGORY = 1;

    public DataBaseOpenHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
        mContext = context;
        initialize();
    }

    /**
     * Initializes database. Creates database if doesn't exist.
     */
    private void initialize() {
        if (databaseExists()) {
            SharedPreferences prefs = PreferenceManager
                    .getDefaultSharedPreferences(mContext);
            int dbVersion = prefs.getInt(SP_KEY_DB_VER, 1);
            if (DATABASE_VERSION != dbVersion) {
                File dbFile = mContext.getDatabasePath(DATABASE_NAME);
                if (!dbFile.delete()) {
                    Log.w("Failed", "Unable to update database");
                }
            }
        }
        if (!databaseExists()) {
            createDatabase();
        }
    }

    /**
     * Returns true if database file exists, false otherwise.
     * @return
     */
    private boolean databaseExists() {
        File dbFile = mContext.getDatabasePath(DATABASE_NAME);
        return dbFile.exists();
    }

    /**
     * Creates database by copying it from assets directory.
     */
    private void createDatabase() {
        String parentPath = mContext.getDatabasePath(DATABASE_NAME).getParent();
        String path = mContext.getDatabasePath(DATABASE_NAME).getPath();

        File file = new File(parentPath);
        if (!file.exists()) {
            if (!file.mkdir()) {
                Log.w("FAILED", "Unable to create database directory");
                return;
            }
        }

        InputStream is = null;
        OutputStream os = null;
        try {
            is = mContext.getAssets().open(DATABASE_NAME);
            os = new FileOutputStream(path);

            byte[] buffer = new byte[1024];
            int length;
            while ((length = is.read(buffer)) > 0) {
                os.write(buffer, 0, length);
            }
            os.flush();
            SharedPreferences prefs = PreferenceManager
                    .getDefaultSharedPreferences(mContext);
            SharedPreferences.Editor editor = prefs.edit();
            editor.putInt(SP_KEY_DB_VER, DATABASE_VERSION);
            editor.commit();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (is != null) {
                try {
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (os != null) {
                try {
                    os.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion,
                          int newVersion) {
    }

} // class