| 1 | <?php |
| 2 | |
| 3 | class Bd |
| 4 | { |
| 5 | private static ?PDO $pdo = null; |
| 6 | |
| 7 | static function pdo(): PDO |
| 8 | { |
| 9 | if (self::$pdo === null) { |
| 10 | |
| 11 | self::$pdo = new PDO( |
| 12 | |
| 13 | "sqlite:srvauno.db", |
| 14 | |
| 15 | null, |
| 16 | |
| 17 | null, |
| 18 | |
| 19 | [PDO::ATTR_PERSISTENT => false, PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION] |
| 20 | ); |
| 21 | |
| 22 | self::$pdo->exec( |
| 23 | 'CREATE TABLE IF NOT EXISTS PASATIEMPO ( |
| 24 | PAS_ID INTEGER, |
| 25 | PAS_NOMBRE TEXT NOT NULL, |
| 26 | CONSTRAINT PAS_PK |
| 27 | PRIMARY KEY(PAS_ID), |
| 28 | CONSTRAINT PAS_NOM_UNQ |
| 29 | UNIQUE(PAS_NOMBRE), |
| 30 | CONSTRAINT PAS_NOM_NV |
| 31 | CHECK(LENGTH(PAS_NOMBRE) > 0) |
| 32 | )' |
| 33 | ); |
| 34 | self::$pdo->exec( |
| 35 | 'CREATE TABLE IF NOT EXISTS AMIGO ( |
| 36 | AMI_ID INTEGER, |
| 37 | AMI_NOMBRE TEXT NOT NULL, |
| 38 | PAS_ID INTEGER, |
| 39 | CONSTRAINT AMI_PK |
| 40 | PRIMARY KEY(AMI_ID), |
| 41 | CONSTRAINT AMI_NOM_UNQ |
| 42 | UNIQUE(AMI_NOMBRE), |
| 43 | CONSTRAINT AMI_NOM_NV |
| 44 | CHECK(LENGTH(AMI_NOMBRE) > 0), |
| 45 | CONSTRAINT AMI_PAS_FK |
| 46 | FOREIGN KEY (PAS_ID) REFERENCES PASATIEMPO(PAS_ID) |
| 47 | )' |
| 48 | ); |
| 49 | |
| 50 | $cantidadDePasatiempos = |
| 51 | self::$pdo->query("SELECT COUNT(PAS_ID) FROM PASATIEMPO")->fetchColumn(); |
| 52 | |
| 53 | if ($cantidadDePasatiempos === 0) { |
| 54 | self::$pdo->exec( |
| 55 | "INSERT INTO PASATIEMPO (PAS_NOMBRE) VALUES ('Futbol'), ('Videojuegos')" |
| 56 | ); |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | return self::$pdo; |
| 61 | } |
| 62 | } |
| 63 | |