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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;
import android.util.Log;
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("PRAGMA foreign_keys=ON;");
db.execSQL("create table " + Account.TABLENAME + "(" + Account.UUID
+ " TEXT PRIMARY KEY," + Account.USERNAME + " TEXT," + Account.SERVER
+ " TEXT," + Account.PASSWORD + " TEXT)");
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,"
+ "FOREIGN KEY("+Conversation.ACCOUNT+") REFERENCES "+Account.TABLENAME+"("+Account.UUID+") ON DELETE CASCADE);");
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,"
+ "FOREIGN KEY("+Message.CONVERSATION+") REFERENCES "+Conversation.TABLENAME+"("+Message.UUID+") ON DELETE CASCADE);");
}
@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 void createAccount(Account account) {
SQLiteDatabase db = this.getWritableDatabase();
db.insert(Account.TABLENAME, null, account.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<Conversation> getConversations(int status) {
List<Conversation> list = new ArrayList<Conversation>();
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<Message> getMessages(Conversation conversation, int limit) {
List<Message> list = new ArrayList<Message>();
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.getWritableDatabase();
String[] args = { conversation.getUuid() };
db.update(Conversation.TABLENAME, conversation.getContentValues(),
Conversation.UUID + "=?", args);
}
public List<Account> getAccounts() {
List<Account> list = new ArrayList<Account>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(Account.TABLENAME, null, null, null, null,
null, null);
Log.d("gultsch", "found " + cursor.getCount() + " accounts");
while (cursor.moveToNext()) {
list.add(Account.fromCursor(cursor));
}
return list;
}
public void updateAccount(Account account) {
SQLiteDatabase db = this.getWritableDatabase();
String[] args = { account.getUuid() };
db.update(Account.TABLENAME, account.getContentValues(), Account.UUID
+ "=?", args);
}
public void deleteAccount(Account account) {
SQLiteDatabase db = this.getWritableDatabase();
String[] args = { account.getUuid() };
Log.d("gultsch", "backend trying to delete account with uuid:"
+ account.getUuid());
db.delete(Account.TABLENAME, Account.UUID + "=?", args);
}
@Override
public SQLiteDatabase getWritableDatabase() {
SQLiteDatabase db = super.getWritableDatabase();
db.execSQL("PRAGMA foreign_keys=ON;");
return db;
}
}
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