package ch.asynk.rustanddust; import java.security.MessageDigest; import java.math.BigInteger; import com.badlogic.gdx.sql.Database; import com.badlogic.gdx.sql.DatabaseCursor; import com.badlogic.gdx.sql.DatabaseFactory; import com.badlogic.gdx.sql.SQLiteGdxException; public class DB { private static final int DB_SCHEMA_VERSION = 1; public static final int NO_RECORDS = -1; private static final String DIGEST = "SHA-256"; private Database db; private MessageDigest md; private static final String TBL_CFG_CRT = "create table if not exists" + " config ( key text primary key, value text not null);" + " insert or ignore into config values(\"version\", " + DB_SCHEMA_VERSION + ");"; private static final String TBL_PLAYERS_CRT = "create table if not exists" + " players ( _id integer primary key autoincrement," + " hash text unique not null, gmail text unique not null, firstname text, lastname text" + ");"; private static final String TBL_BATTLES_CRT = "create table if not exists" + " battles ( _id integer primary key, name text" + ");"; private static final String TBL_GAMES_CRT = "create table if not exists" + " games ( _id integer primary key autoincrement," + " _p1 integer not null, _p2 integer not null, _b integer not null," + " int mode not null, ts datetime default current_timestamp," + " foreign key (_p1) references players(_id)," + " foreign key (_p2) references players(_id)," + " foreign key (_b) references battles(_id)," + " unique (_p1, _p2, _b)" + ");"; private static final String TBL_TURNS_CRT = "create table if not exists" + " turns ( _id integer primary key autoincrement, _g integer not null," + " _p integer not null, hash text not null, payload text not null," + " foreign key (_g) references games(_id)," + " foreign key (_p) references players(_id)" + ");"; private static final String TBL_STATES_CRT = "create table if not exists" + " states ( _g integer unique not null," + " hash text not null, payload text not null," + " foreign key (_g) references games(_id)" + ");"; private static final String INSERT_PLAYER = "insert into players(hash,gmail,firstname,lastname) values ('%s','%s','%s','%s');"; private static final String GET_PLAYER_ID = "select _id from players where hash='%s';"; private static final String UPDATE_BATTLE = "insert or replace into battles values (%d,'%s');"; private static final String INSERT_GAME = "insert into games(_p1,_p2,_b,m) values (%d,%d,%d,%d);"; private static final String GET_GAME_ID = "select _id from games where _p1=%d and _p2=%d and _b=%d;"; private static final String INSERT_TURN = "insert into turns(_g,_p,hash,payload) values (%d,%d,'%s','%s'); update games set ts=current_timestamp where _id=%d;"; private static final String INSERT_STATE = "insert or replace into states(_g,hash,payload) values (%d,'%s','%s'); update games set ts=current_timestamp where _id=%d;"; private static final String DB_CRT = TBL_CFG_CRT + TBL_PLAYERS_CRT + TBL_BATTLES_CRT + TBL_GAMES_CRT + TBL_TURNS_CRT + TBL_STATES_CRT; public DB(String dbPath) { db = DatabaseFactory.getNewDatabase(dbPath, DB_SCHEMA_VERSION, DB_CRT, null); db.setupDatabase(); } public void setup() { try { md = MessageDigest.getInstance(DIGEST); } catch (java.security.NoSuchAlgorithmException e) { } try { db.openOrCreateDatabase(); } catch (SQLiteGdxException e) { } } private String getDigest(String str) { String hash = null; try { hash = new BigInteger(1, md.digest(str.getBytes("UTF-8"))).toString(16); } catch (java.io.UnsupportedEncodingException e) { } return hash; } public String storePlayer(String gmail, String firstname, String lastname) { String hash = getDigest(gmail + firstname + lastname); if (hash == null) return null; try { if (getPlayerId(hash) == NO_RECORDS) { db.execSQL(String.format(INSERT_PLAYER, hash, gmail, firstname, lastname)); } } catch (SQLiteGdxException e) { return null; } return hash; } public int getPlayerId(String hash) { int ret = NO_RECORDS; try { DatabaseCursor cursor = db.rawQuery(String.format(GET_PLAYER_ID, hash)); if (cursor.getCount() > 0) { cursor.next(); ret = cursor.getInt(0); } } catch (SQLiteGdxException e) { } return ret; } public int storePlayerGetId(String gmail, String firstname, String lastname) { String hash = storePlayer(gmail, firstname, lastname); if (hash == null) return NO_RECORDS; return getPlayerId(hash); } public void storeBattle(int id, String name) { try { db.execSQL(String.format(UPDATE_BATTLE, id, name)); } catch (SQLiteGdxException e) { } } public void storeGame(int you, int opponent, int battle, int mode) { try { if (getGameId(you, opponent, battle, mode) == NO_RECORDS) db.execSQL(String.format(INSERT_GAME, you, opponent, battle, mode)); } catch (SQLiteGdxException e) { } } public int getGameId(int you, int opponent, int battle, int mode) { int ret = NO_RECORDS; try { DatabaseCursor cursor = db.rawQuery(String.format(GET_GAME_ID, you, opponent, battle, mode)); if (cursor.getCount() > 0) { cursor.next(); ret = cursor.getInt(0); } } catch (SQLiteGdxException e) { } return ret; } public int storeGameGetId(int you, int opponent, int battle, int mode) { storeGame(you, opponent, battle, mode); return getGameId(you, opponent, battle, mode); } public boolean storeTurn(int game, int player, String payload) { try { String hash = getDigest(payload); if (hash == null) return false; db.execSQL(String.format(INSERT_TURN, game, player, hash, payload, game)); } catch (SQLiteGdxException e) { return false; } return true; } public boolean storeState(int game, String payload) { try { String hash = getDigest(payload); if (hash == null) return false; db.execSQL(String.format(INSERT_STATE, game, hash, payload, game)); } catch (SQLiteGdxException e) { return false; } return true; } }