| 1 | <?php | 
| 2 | |
| 3 | const BAD_REQUEST = 400; | 
| 4 | 
| 1 | <?php | 
| 2 | |
| 3 | function calculaArregloDeParametros(array $arreglo) | 
| 4 | { | 
| 5 | $parametros = []; | 
| 6 | foreach ($arreglo as $llave => $valor) { | 
| 7 | $parametros[":$llave"] = $valor; | 
| 8 | } | 
| 9 | return $parametros; | 
| 10 | } | 
| 11 | 
| 1 | <?php | 
| 2 | |
| 3 | function calculaSqlDeAsignaciones(string $separador, array $arreglo) | 
| 4 | { | 
| 5 | $primerElemento = true; | 
| 6 | $sqlDeAsignacion = ""; | 
| 7 | foreach ($arreglo as $llave => $valor) { | 
| 8 | $sqlDeAsignacion .= | 
| 9 | ($primerElemento === true ? "" : $separador) . "$llave=:$llave"; | 
| 10 | $primerElemento = false; | 
| 11 | } | 
| 12 | return $sqlDeAsignacion; | 
| 13 | } | 
| 14 | 
| 1 | <?php | 
| 2 | |
| 3 | function calculaSqlDeCamposDeInsert(array $values) | 
| 4 | { | 
| 5 | $primerCampo = true; | 
| 6 | $sqlDeCampos = ""; | 
| 7 | foreach ($values as $nombreDeValue => $valorDeValue) { | 
| 8 | $sqlDeCampos .= ($primerCampo === true ? "" : ",") . "$nombreDeValue"; | 
| 9 | $primerCampo = false; | 
| 10 | } | 
| 11 | return $sqlDeCampos; | 
| 12 | } | 
| 13 | 
| 1 | <?php | 
| 2 | |
| 3 | function calculaSqlDeValues(array $values) | 
| 4 | { | 
| 5 | $primerValue = true; | 
| 6 | $sqlDeValues = ""; | 
| 7 | foreach ($values as $nombreDeValue => $valorDeValue) { | 
| 8 | $sqlDeValues .= ($primerValue === true ? "" : ",") . ":$nombreDeValue"; | 
| 9 | $primerValue = false; | 
| 10 | } | 
| 11 | return $sqlDeValues; | 
| 12 | } | 
| 13 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/calculaArregloDeParametros.php"; | 
| 4 | require_once __DIR__ . "/calculaSqlDeAsignaciones.php"; | 
| 5 | |
| 6 | function delete(PDO $pdo, string $from, array $where) | 
| 7 | { | 
| 8 | $sql = "DELETE FROM $from"; | 
| 9 | |
| 10 | if (sizeof($where) === 0) { | 
| 11 | $pdo->exec($sql); | 
| 12 | } else { | 
| 13 | $sqlDeWhere = calculaSqlDeAsignaciones(" AND ", $where); | 
| 14 | $sql .= " WHERE $sqlDeWhere"; | 
| 15 | |
| 16 | $statement = $pdo->prepare($sql); | 
| 17 | $parametros = calculaArregloDeParametros($where); | 
| 18 | $statement->execute($parametros); | 
| 19 | } | 
| 20 | } | 
| 21 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/devuelveResultadoNoJson.php"; | 
| 4 | |
| 5 | function devuelveCreated($urlDelNuevo, $resultado) | 
| 6 | { | 
| 7 | |
| 8 | $json = json_encode($resultado); | 
| 9 | |
| 10 | if ($json === false) { | 
| 11 | |
| 12 | devuelveResultadoNoJson(); | 
| 13 | } else { | 
| 14 | |
| 15 | http_response_code(201); | 
| 16 | header("Location: {$urlDelNuevo}"); | 
| 17 | header("Content-Type: application/json"); | 
| 18 | echo $json; | 
| 19 | } | 
| 20 | } | 
| 21 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/INTERNAL_SERVER_ERROR.php"; | 
| 4 | require_once __DIR__ . "/devuelveProblemDetails.php"; | 
| 5 | require_once __DIR__ . "/devuelveProblemDetails.php"; | 
| 6 | |
| 7 | function devuelveErrorInterno(Throwable $error) | 
| 8 | { | 
| 9 | devuelveProblemDetails(new ProblemDetails( | 
| 10 | status: INTERNAL_SERVER_ERROR, | 
| 11 | title: $error->getMessage(), | 
| 12 | type: "/error/errorinterno.html" | 
| 13 | )); | 
| 14 | } | 
| 15 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/devuelveResultadoNoJson.php"; | 
| 4 | |
| 5 | function devuelveJson($resultado) | 
| 6 | { | 
| 7 | |
| 8 | $json = json_encode($resultado); | 
| 9 | |
| 10 | if ($json === false) { | 
| 11 | |
| 12 | devuelveResultadoNoJson(); | 
| 13 | } else { | 
| 14 | |
| 15 | http_response_code(200); | 
| 16 | header("Content-Type: application/json"); | 
| 17 | echo $json; | 
| 18 | } | 
| 19 | } | 
| 20 | 
| 1 | <?php | 
| 2 | |
| 3 | function devuelveNoContent() | 
| 4 | { | 
| 5 | http_response_code(204); | 
| 6 | } | 
| 7 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/devuelveResultadoNoJson.php"; | 
| 4 | require_once __DIR__ . "/ProblemDetails.php"; | 
| 5 | |
| 6 | function devuelveProblemDetails(ProblemDetails $details) | 
| 7 | { | 
| 8 | |
| 9 | $body = ["title" => $details->title]; | 
| 10 | if ($details->type !== null) { | 
| 11 | $body["type"] = $details->type; | 
| 12 | } | 
| 13 | if ($details->detail !== null) { | 
| 14 | $body["detail"] = $details->detail; | 
| 15 | } | 
| 16 | |
| 17 | $json = json_encode($body); | 
| 18 | |
| 19 | if ($json === false) { | 
| 20 | |
| 21 | devuelveResultadoNoJson(); | 
| 22 | } else { | 
| 23 | |
| 24 | http_response_code($details->status); | 
| 25 | header("Content-Type: application/problem+json"); | 
| 26 | echo $json; | 
| 27 | } | 
| 28 | } | 
| 29 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/INTERNAL_SERVER_ERROR.php"; | 
| 4 | |
| 5 | function devuelveResultadoNoJson() | 
| 6 | { | 
| 7 | |
| 8 | http_response_code(INTERNAL_SERVER_ERROR); | 
| 9 | header("Content-Type: application/problem+json"); | 
| 10 | echo '{' . | 
| 11 | '"title": "El resultado no puede representarse como JSON."' . | 
| 12 | '"type": "/error/resultadonojson.html"' . | 
| 13 | '}'; | 
| 14 | } | 
| 15 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/ProblemDetails.php"; | 
| 4 | require_once __DIR__ . "/devuelveProblemDetails.php"; | 
| 5 | require_once __DIR__ . "/devuelveErrorInterno.php"; | 
| 6 | |
| 7 | function ejecutaServicio(callable $codigo) | 
| 8 | { | 
| 9 | try { | 
| 10 | $codigo(); | 
| 11 | } catch (ProblemDetails $details) { | 
| 12 | devuelveProblemDetails($details); | 
| 13 | } catch (Throwable $error) { | 
| 14 | devuelveErrorInterno($error); | 
| 15 | } | 
| 16 | } | 
| 17 | 
| 1 | <?php | 
| 2 | |
| 3 | function fetch( | 
| 4 | PDOStatement|false $statement, | 
| 5 | $parametros = [], | 
| 6 | int $mode = PDO::FETCH_ASSOC, | 
| 7 | $opcional = null | 
| 8 | ) { | 
| 9 | |
| 10 | if ($statement === false) { | 
| 11 | |
| 12 | return false; | 
| 13 | } else { | 
| 14 | |
| 15 | if (sizeof($parametros) > 0) { | 
| 16 | $statement->execute($parametros); | 
| 17 | } | 
| 18 | |
| 19 | if ($opcional === null) { | 
| 20 | return $statement->fetch($mode); | 
| 21 | } else { | 
| 22 | $statement->setFetchMode($mode, $opcional); | 
| 23 | return $statement->fetch(); | 
| 24 | } | 
| 25 | } | 
| 26 | } | 
| 27 | 
| 1 | <?php | 
| 2 | |
| 3 | function fetchAll( | 
| 4 | PDOStatement|false $statement, | 
| 5 | $parametros = [], | 
| 6 | int $mode = PDO::FETCH_ASSOC, | 
| 7 | $opcional = null | 
| 8 | ): array { | 
| 9 | |
| 10 | if ($statement === false) { | 
| 11 | |
| 12 | return []; | 
| 13 | } else { | 
| 14 | |
| 15 | if (sizeof($parametros) > 0) { | 
| 16 | $statement->execute($parametros); | 
| 17 | } | 
| 18 | |
| 19 | $resultado = $opcional === null | 
| 20 | ? $statement->fetchAll($mode) | 
| 21 | : $statement->fetchAll($mode, $opcional); | 
| 22 | |
| 23 | if ($resultado === false) { | 
| 24 | return []; | 
| 25 | } else { | 
| 26 | return $resultado; | 
| 27 | } | 
| 28 | } | 
| 29 | } | 
| 30 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/calculaSqlDeCamposDeInsert.php"; | 
| 4 | require_once __DIR__ . "/calculaSqlDeValues.php"; | 
| 5 | require_once __DIR__ . "/calculaArregloDeParametros.php"; | 
| 6 | |
| 7 | function insert(PDO $pdo, string $into, array $values) | 
| 8 | { | 
| 9 | $sqlDeCampos = calculaSqlDeCamposDeInsert($values); | 
| 10 | $sqlDeValues = calculaSqlDeValues($values); | 
| 11 | $sql = "INSERT INTO $into ($sqlDeCampos) VALUES ($sqlDeValues)"; | 
| 12 | $parametros = calculaArregloDeParametros($values); | 
| 13 | $pdo->prepare($sql)->execute($parametros); | 
| 14 | } | 
| 15 | 
| 1 | <?php | 
| 2 | |
| 3 | const INTERNAL_SERVER_ERROR = 500; | 
| 1 | <?php | 
| 2 | |
| 3 | const NOT_FOUND = 404; | 
| 4 | 
| 1 | <?php | 
| 2 | |
| 3 | /** Detalle de los errores devueltos por un servicio. */ | 
| 4 | class ProblemDetails extends Exception | 
| 5 | { | 
| 6 | |
| 7 | public int $status; | 
| 8 | public string $title; | 
| 9 | public ?string $type; | 
| 10 | public ?string $detail; | 
| 11 | |
| 12 | public function __construct( | 
| 13 | int $status, | 
| 14 | string $title, | 
| 15 | ?string $type = null, | 
| 16 | ?string $detail = null, | 
| 17 | Throwable $previous = null | 
| 18 | ) { | 
| 19 | parent::__construct($title, $status, $previous); | 
| 20 | $this->status = $status; | 
| 21 | $this->type = $type; | 
| 22 | $this->title = $title; | 
| 23 | $this->detail = $detail; | 
| 24 | } | 
| 25 | } | 
| 26 | 
| 1 | <?php | 
| 2 | |
| 3 | use function PHPSTORM_META\type; | 
| 4 | |
| 5 | require_once __DIR__ . "/BAD_REQUEST.php"; | 
| 6 | require_once __DIR__ . "/INTERNAL_SERVER_ERROR.php"; | 
| 7 | require_once __DIR__ . "/ProblemDetails.php"; | 
| 8 | |
| 9 | function recuperaBytes(string $parametro): false|string | 
| 10 | { | 
| 11 | if (isset($_FILES[$parametro])) { | 
| 12 | $path = $_FILES[$parametro]["tmp_name"]; | 
| 13 | |
| 14 | if ($path === "") { | 
| 15 | return ""; | 
| 16 | } elseif (is_uploaded_file($path)) { | 
| 17 | |
| 18 | $contents = file_get_contents($path); | 
| 19 | |
| 20 | if ($contents === false) { | 
| 21 | |
| 22 | switch ($_FILES[$parametro]['error']) { | 
| 23 | |
| 24 | case UPLOAD_ERR_OK: | 
| 25 | |
| 26 | return $contents; | 
| 27 | |
| 28 | case UPLOAD_ERR_INI_SIZE: | 
| 29 | case UPLOAD_ERR_FORM_SIZE: | 
| 30 | |
| 31 | throw new ProblemDetails( | 
| 32 | status: BAD_REQUEST, | 
| 33 | title: "Archivo demasiado largo.", | 
| 34 | type: "/error/archivodemasiadolargo.html", | 
| 35 | detail: "El archivo " - $parametro . | 
| 36 | " excede el tamaño máximo que el servidor puede recibir." | 
| 37 | ); | 
| 38 | |
| 39 | case UPLOAD_ERR_PARTIAL: | 
| 40 | |
| 41 | throw new ProblemDetails( | 
| 42 | status: INTERNAL_SERVER_ERROR, | 
| 43 | title: "Carga incompleta de archivo.", | 
| 44 | type: "/error/archivocargaincompleta.html", | 
| 45 | detail: "Por una razón desconocida, el archivo " - $parametro . | 
| 46 | " no se cargó completamente." | 
| 47 | ); | 
| 48 | |
| 49 | case UPLOAD_ERR_NO_FILE: | 
| 50 | |
| 51 | throw creaArchivoNoEnviado($parametro); | 
| 52 | |
| 53 | case UPLOAD_ERR_NO_TMP_DIR: | 
| 54 | |
| 55 | throw new ProblemDetails( | 
| 56 | status: INTERNAL_SERVER_ERROR, | 
| 57 | title: "Falta la carpeta temporal.", | 
| 58 | type: "/error/faltacarpetatemporal.html", | 
| 59 | detail: "Por una razón desconocida, falta la carpeta temporal " . | 
| 60 | "para cargar el archivo $parametro.", | 
| 61 | ); | 
| 62 | |
| 63 | case UPLOAD_ERR_CANT_WRITE: | 
| 64 | |
| 65 | throw new ProblemDetails( | 
| 66 | status: INTERNAL_SERVER_ERROR, | 
| 67 | title: "El archivo no se guardó.", | 
| 68 | type: "/error/archivonoguardado.html", | 
| 69 | detail: "Por una razón desconocida, el archivo " - $parametro . | 
| 70 | " no se pudo guardar en disco.", | 
| 71 | ); | 
| 72 | |
| 73 | case UPLOAD_ERR_EXTENSION: | 
| 74 | |
| 75 | throw new ProblemDetails( | 
| 76 | status: BAD_REQUEST, | 
| 77 | title: "Extensión no permitida.", | 
| 78 | type: "/error/extensionprohibida.html", | 
| 79 | detail: "La extensión del archivo " - $parametro . | 
| 80 | " no está permitida en el servidor." | 
| 81 | ); | 
| 82 | |
| 83 | default: | 
| 84 | |
| 85 | throw new Exception("Error no identificado recuperando el archivo " . | 
| 86 | $parametro . "."); | 
| 87 | } | 
| 88 | } else { | 
| 89 | |
| 90 | return $contents; | 
| 91 | } | 
| 92 | } else { | 
| 93 | |
| 94 | throw creaArchivoNoEnviado($parametro); | 
| 95 | } | 
| 96 | } else { | 
| 97 | return false; | 
| 98 | } | 
| 99 | } | 
| 100 | |
| 101 | function creaArchivoNoEnviado(string $parametro) | 
| 102 | { | 
| 103 | return new ProblemDetails( | 
| 104 | status: BAD_REQUEST, | 
| 105 | title: "Archivo no enviado.", | 
| 106 | type: "/error/archivonoenviado.html", | 
| 107 | detail: "El archivo $parametro no fué recibido por el servidor." | 
| 108 | ); | 
| 109 | } | 
| 110 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/recuperaTexto.php"; | 
| 4 | |
| 5 | /** | 
| 6 | * Devuelve el valor entero de un parámetro recibido en el | 
| 7 | * servidor por medio de GET, POST o cookie. | 
| 8 | * | 
| 9 | * Si el parámetro no se recibe, devuekve false | 
| 10 | * | 
| 11 | * Si se recibe una cadena vacía, se devuelve null. | 
| 12 | * | 
| 13 | * Si parámetro no se puede convertir a entero, se genera | 
| 14 | * un error. | 
| 15 | */ | 
| 16 | function recuperaEntero(string $parametro): false|null|int | 
| 17 | { | 
| 18 | $valor = recuperaTexto($parametro); | 
| 19 | if ($valor === false) { | 
| 20 | return false; | 
| 21 | } elseif ($valor === "") { | 
| 22 | return null; | 
| 23 | } else { | 
| 24 | return (int) trim($valor); | 
| 25 | } | 
| 26 | } | 
| 27 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/BAD_REQUEST.php"; | 
| 4 | require_once __DIR__ . "/recuperaEntero.php"; | 
| 5 | require_once __DIR__ . "/ProblemDetails.php"; | 
| 6 | |
| 7 | function recuperaIdEntero(string $parametro): int | 
| 8 | { | 
| 9 | |
| 10 | $id = recuperaEntero($parametro); | 
| 11 | |
| 12 | if ($id === false) | 
| 13 | throw new ProblemDetails( | 
| 14 | status: BAD_REQUEST, | 
| 15 | title: "Falta el id.", | 
| 16 | type: "/error/faltaid.html", | 
| 17 | detail: "La solicitud no tiene el valor de id.", | 
| 18 | ); | 
| 19 | |
| 20 | if ($id === null) | 
| 21 | throw new ProblemDetails( | 
| 22 | status: BAD_REQUEST, | 
| 23 | title: "Id en blanco.", | 
| 24 | type: "/error/idenblanco.html", | 
| 25 | ); | 
| 26 | |
| 27 | return $id; | 
| 28 | } | 
| 29 | 
| 1 | <?php | 
| 2 | |
| 3 | /** | 
| 4 | * Recupera el texto de un parámetro enviado al | 
| 5 | * servidor por medio de GET, POST o cookie. | 
| 6 | * | 
| 7 | * Si el parámetro no se recibe, devuelve false. | 
| 8 | */ | 
| 9 | function recuperaTexto(string $parametro): false|string | 
| 10 | { | 
| 11 | /* Si el parámetro está asignado en $_REQUEST, | 
| 12 | * devuelve su valor; de lo contrario, devuelve false. | 
| 13 | */ | 
| 14 | $valor = isset($_REQUEST[$parametro]) | 
| 15 | ? $_REQUEST[$parametro] | 
| 16 | : false; | 
| 17 | return $valor; | 
| 18 | } | 
| 19 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/fetchAll.php"; | 
| 4 | require_once __DIR__ . "/calculaSqlDeAsignaciones.php"; | 
| 5 | |
| 6 | function select( | 
| 7 | PDO $pdo, | 
| 8 | string $from, | 
| 9 | array $where = [], | 
| 10 | string $orderBy = "", | 
| 11 | int $mode = PDO::FETCH_ASSOC, | 
| 12 | $opcional = null | 
| 13 | ) { | 
| 14 | $sql = "SELECT * FROM $from"; | 
| 15 | |
| 16 | if (sizeof($where) > 0) { | 
| 17 | $sqlDeWhere = calculaSqlDeAsignaciones(" AND ", $where); | 
| 18 | $sql .= " WHERE $sqlDeWhere"; | 
| 19 | } | 
| 20 | |
| 21 | if ($orderBy !== "") { | 
| 22 | $sql .= " ORDER BY $orderBy"; | 
| 23 | } | 
| 24 | |
| 25 | if (sizeof($where) === 0) { | 
| 26 | $statement = $pdo->query($sql); | 
| 27 | return fetchAll($statement, [], $mode, $opcional); | 
| 28 | } else { | 
| 29 | $statement = $pdo->prepare($sql); | 
| 30 | $parametros = calculaArregloDeParametros($where); | 
| 31 | return fetchAll($statement, $parametros, $mode, $opcional); | 
| 32 | } | 
| 33 | } | 
| 34 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/fetch.php"; | 
| 4 | require_once __DIR__ . "/calculaArregloDeParametros.php"; | 
| 5 | require_once __DIR__ . "/calculaSqlDeAsignaciones.php"; | 
| 6 | |
| 7 | function selectFirst( | 
| 8 | PDO $pdo, | 
| 9 | string $from, | 
| 10 | array $where = [], | 
| 11 | string $orderBy = "", | 
| 12 | int $mode = PDO::FETCH_ASSOC, | 
| 13 | $opcional = null | 
| 14 | ) { | 
| 15 | $sql = "SELECT * FROM $from"; | 
| 16 | |
| 17 | if (sizeof($where) > 0) { | 
| 18 | $sqlDeWhere = calculaSqlDeAsignaciones(" AND ", $where); | 
| 19 | $sql .= " WHERE $sqlDeWhere"; | 
| 20 | } | 
| 21 | |
| 22 | if ($orderBy !== "") { | 
| 23 | $sql .= " ORDER BY $orderBy"; | 
| 24 | } | 
| 25 | |
| 26 | if (sizeof($where) === 0) { | 
| 27 | $statement = $pdo->query($sql); | 
| 28 | return fetch($statement, [], $mode, $opcional); | 
| 29 | } else { | 
| 30 | $statement = $pdo->prepare($sql); | 
| 31 | $parametros = calculaArregloDeParametros($where); | 
| 32 | return fetch($statement, $parametros, $mode, $opcional); | 
| 33 | } | 
| 34 | } | 
| 35 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/calculaArregloDeParametros.php"; | 
| 4 | require_once __DIR__ . "/calculaSqlDeAsignaciones.php"; | 
| 5 | |
| 6 | |
| 7 | function update(PDO $pdo, string $table, array $set, array $where) | 
| 8 | { | 
| 9 | $sqlDeSet = calculaSqlDeAsignaciones(",", $set); | 
| 10 | $sqlDeWhere = calculaSqlDeAsignaciones(" AND ", $where); | 
| 11 | $sql = "UPDATE $table SET $sqlDeSet WHERE $sqlDeWhere"; | 
| 12 | |
| 13 | $parametros = calculaArregloDeParametros($set); | 
| 14 | foreach ($where as $nombreDeWhere => $valorDeWhere) { | 
| 15 | $parametros[":$nombreDeWhere"] = $valorDeWhere; | 
| 16 | } | 
| 17 | $statement = $pdo->prepare($sql); | 
| 18 | $statement->execute($parametros); | 
| 19 | } | 
| 20 | 
| 1 | <?php | 
| 2 | |
| 3 | require_once __DIR__ . "/BAD_REQUEST.php"; | 
| 4 | require_once __DIR__ . "/ProblemDetails.php"; | 
| 5 | |
| 6 | function validaNombre(false|string $nombre) | 
| 7 | { | 
| 8 | |
| 9 | if ($nombre === false) | 
| 10 | throw new ProblemDetails( | 
| 11 | status: BAD_REQUEST, | 
| 12 | title: "Falta el nombre.", | 
| 13 | type: "/error/faltanombre.html", | 
| 14 | detail: "La solicitud no tiene el valor de nombre." | 
| 15 | ); | 
| 16 | |
| 17 | $trimNombre = trim($nombre); | 
| 18 | |
| 19 | if ($trimNombre === "") | 
| 20 | throw new ProblemDetails( | 
| 21 | status: BAD_REQUEST, | 
| 22 | title: "Nombre en blanco.", | 
| 23 | type: "/error/nombreenblanco.html", | 
| 24 | detail: "Pon texto en el campo nombre.", | 
| 25 | ); | 
| 26 | |
| 27 | return $trimNombre; | 
| 28 | } | 
| 29 |