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package de.gultsch.chat.persistance;
import java.util.ArrayList;
import java.util.List;
import de.gultsch.chat.entities.Conversation;
import de.gultsch.chat.entities.Message;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseBackend extends SQLiteOpenHelper {
private static DatabaseBackend instance = null;
private static final String DATABASE_NAME = "history";
private static final int DATABASE_VERSION = 1;
public DatabaseBackend(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table " + Conversation.TABLENAME + " ("
+ Conversation.UUID + " TEXT, " + Conversation.NAME + " TEXT, "
+ Conversation.PHOTO_URI + " TEXT, " + Conversation.ACCOUNT
+ " TEXT, " + Conversation.CONTACT + " TEXT, "
+ Conversation.CREATED + " NUMBER, " + Conversation.STATUS
+ " NUMBER)");
db.execSQL("create table "+Message.TABLENAME+ "()");
}
@Override
public void onUpgrade(SQLiteDatabase db, int arg1, int arg2) {
// TODO Auto-generated method stub
}
public static synchronized DatabaseBackend getInstance(Context context) {
if (instance == null) {
instance = new DatabaseBackend(context);
}
return instance;
}
public void addConversation(Conversation conversation) {
SQLiteDatabase db = this.getWritableDatabase();
db.insert("conversations", null, conversation.getContentValues());
}
public int getConversationCount() {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(
"select count(uuid) as count from conversations", null);
cursor.moveToFirst();
return cursor.getInt(0);
}
public List<Conversation> getConversations(int status) {
List<Conversation> list = new ArrayList<Conversation>();
SQLiteDatabase db = this.getReadableDatabase();
String[] selectionArgs = { "" + status };
Cursor cursor = db
.rawQuery(
"select * from conversations where status = ? order by created desc",
selectionArgs);
while (cursor.moveToNext()) {
list.add(Conversation.fromCursor(cursor));
}
return list;
}
}
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