package de.gultsch.chat.persistance; import java.util.ArrayList; import java.util.List; import de.gultsch.chat.entities.Account; import de.gultsch.chat.entities.Contact; 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 PRIMARY KEY, " + 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 + "( " + Message.UUID + " TEXT PRIMARY KEY, " + Message.CONVERSATION + " TEXT, " + Message.TIME_SENT +" NUMBER, " + Message.COUNTERPART + " TEXT, " + Message.BODY + " TEXT, " + Message.ENCRYPTION + " NUMBER, " + Message.STATUS + " NUMBER)"); } @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 createConversation(Conversation conversation) { SQLiteDatabase db = this.getWritableDatabase(); db.insert(Conversation.TABLENAME, null, conversation.getContentValues()); } public void createMessage(Message message) { SQLiteDatabase db = this.getWritableDatabase(); db.insert(Message.TABLENAME, null, message.getContentValues()); } public int getConversationCount() { SQLiteDatabase db = this.getReadableDatabase(); Cursor cursor = db.rawQuery( "select count(uuid) as count from "+Conversation.TABLENAME+" where "+Conversation.STATUS+"="+Conversation.STATUS_AVAILABLE, null); cursor.moveToFirst(); return cursor.getInt(0); } public List getConversations(int status) { List list = new ArrayList(); SQLiteDatabase db = this.getReadableDatabase(); String[] selectionArgs = { "" + status }; Cursor cursor = db.rawQuery("select * from " + Conversation.TABLENAME + " where " + Conversation.STATUS + " = ? order by " + Conversation.CREATED + " desc", selectionArgs); while (cursor.moveToNext()) { list.add(Conversation.fromCursor(cursor)); } return list; } public List getMessages(Conversation conversation, int limit) { List list = new ArrayList(); SQLiteDatabase db = this.getReadableDatabase(); String[] selectionArgs = { conversation.getUuid() }; Cursor cursor = db.query(Message.TABLENAME, null,Message.CONVERSATION +"=?", selectionArgs, null, null, Message.TIME_SENT+" DESC",String.valueOf(limit)); if (cursor.getCount() > 0 ) { cursor.moveToLast(); do { list.add(Message.fromCursor(cursor)); } while (cursor.moveToPrevious()); } return list; } public Conversation findConversation(Account account, Contact contact) { SQLiteDatabase db = this.getReadableDatabase(); String[] selectionArgs = { account.getUuid() , contact.getJid() }; Cursor cursor = db.query(Conversation.TABLENAME, null,Conversation.ACCOUNT+"=? AND "+Conversation.CONTACT+"=?", selectionArgs, null, null, null); if (cursor.getCount() == 0) return null; cursor.moveToFirst(); return Conversation.fromCursor(cursor); } public void updateConversation(Conversation conversation) { SQLiteDatabase db = this.getReadableDatabase(); String[] args = {conversation.getUuid()}; db.update(Conversation.TABLENAME, conversation.getContentValues(),Conversation.UUID+"=?",args); } }