230 lines
4.2 KiB
PHP
230 lines
4.2 KiB
PHP
<?php
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/**
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* ActiveRecord-Objekt
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*
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* @author Matthias Viehweger <kronn@kronn.de>
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* @version 0.2
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* @package federleicht
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* @subpackage data
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* @todo $fields automatisch aus Datenbank auslesen
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* @todo validator in Basisklasse instanziieren?
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* @todo active_record als Datenzugriffsklasse (und nicht als Datenstruktur) im richtigen Verzeichnis ablegen und von dort laden lassen.
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* @todo active_record sollte auch das Interface data_access und data_wrapper implementieren, da es sowohl Datenzugriff wie Daten selbst darstellt.
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*/
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abstract class fl_data_structures_activerecord implements data_wrapper {
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/**
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* Instanzvariablen
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*/
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protected $db = null;
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protected $table = '';
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protected $data = null;
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public $id = null;
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public $error_messages = array();
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/**
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* Konstruktor
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*
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* @param data_access $db
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* @param string $table
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* @param int $id
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* @param data_wrapper $data
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* @param boolean $loaded
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*/
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public function __construct(data_access $db, $table, $id, data_wrapper $data, $loaded=false) {
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$this->db =& $db;
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$this->table = ( empty($table) ) ? $this->table : $table;
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$this->id = $id;
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$this->data = $data;
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if ( !$loaded ) {
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$this->load();
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}
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}
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/**
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* Daten setzen
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*/
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public function set_data(array $data) {
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foreach ( $data as $key => $value ) {
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if ( empty($value) ) continue;
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$this->data->set($key, $value);
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}
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}
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/**
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* Daten holen
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*
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* @return data_structure
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*/
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public function get_data() {
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return clone $this->data;
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}
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/**
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* Daten holen und als Array zurueckgeben
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*
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* @return array
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*/
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public function get_data_as_array() {
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$data = array();
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foreach ( $this->data as $key => $value ) {
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if ( empty($value) OR $value === null ) continue;
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$data[$key] = $value;
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}
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return $data;
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}
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/**
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* Einzelnes Datenfeld ausgeben
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*
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* @param string $key
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*/
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public function say($key) {
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return $this->data->say($key);
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}
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/**
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* Einzelnes Datenfeld holen
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*
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* @param string $key
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* @return mixed
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*/
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public function get($key) {
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return $this->data->get($key);
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}
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/**
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* Einzelnes Datenfeld setzen
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*
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* @param string $key
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* @param mixed $value
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*/
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public function set($key, $value) {
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return $this->data->set($key, $value);
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}
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/**
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* Prüfung, ob Datenfeld existiert
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*
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* @param string $key
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* @return boolean
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*/
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public function is_set($key) {
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return $this->data->is_set($key);
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}
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/**
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* Einzelnes Datenfeld löschen
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*
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* @param string $key
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*/
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public function remove($key) {
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return $this->data->remove($key);
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}
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/**
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* Daten aus Datenbank laden
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*/
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public function load() {
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if ( $this->id > 0 ) {
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$result = $this->db->convert_result(
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$this->table,
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$this->db->retrieve($this->table, '*', 'id='.$this->id)
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);
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$data = $result[0];
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} else {
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$data = array();
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}
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$result = $this->data->set_data($data);
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if ( $this->id > 0 ) {
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$this->load_additional_data_parts();
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}
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return $result;
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}
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/**
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* Daten in Datenbank speichern
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*
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* @return boolean
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*/
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public function save() {
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$this->prepare_data();
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if ( $this->id > 0 ) {
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$result = $this->db->update($this->table, $this->get_data_as_array(), $this->id);
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} else {
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$result = $this->db->create($this->table, $this->get_data_as_array());
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if ( is_numeric($result) ) {
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$this->id = $result;
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$this->load();
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$result = true;
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}
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}
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return $result;
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}
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/**
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* Daten aus Datenbank loeschen
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*
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* @return boolean
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*/
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public function delete() {
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if ( $this->id > 0 ) {
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$result = $this->db->del($this->table, $this->id);
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} else {
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$result = false;
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}
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return $result;
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}
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/**
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* Objekt als String verwenbar machen
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*/
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public function __toString() {
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return (string) $this->data;
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}
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/**
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* Daten vorbereiten
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*/
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protected function prepare_data() {}
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/**
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* zusätzliche Daten laden
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*/
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protected function load_additional_data_parts() {}
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/**
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* Datenprüfung
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*
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* @return array
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*/
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public function validate_data() {
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/**
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* Prüfregeln durchlaufen
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*/
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$validator = $this->get_validator();
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$this->error_messages += $validator->validate_form($this->get_data());
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return $this->error_messages;
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}
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/**
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* Datenprüfungsobjekt erzeugen
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*
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* @return validation
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*/
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abstract public function get_validator();
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}
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