967 lines
24 KiB
PHP
967 lines
24 KiB
PHP
<?php
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/**
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* This file ...
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*
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* @copyright Icinga Team <team@icinga.org>
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* @license GPLv2 http://www.gnu.org/licenses/gpl-2.0.html
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*/
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namespace Icinga\Module\Director\Data\Db;
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use Icinga\Data\Db\DbConnection;
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use Icinga\Module\Director\Util;
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use Icinga\Exception\IcingaException as IE;
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use Icinga\Exception\NotFoundError;
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use Exception;
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/**
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* Base class for ...
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*/
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abstract class DbObject
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{
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/**
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* DbConnection
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*/
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protected $connection;
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/**
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* Zend_Db_Adapter_Abstract: DB Handle
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*/
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protected $db;
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/**
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* Table name. MUST be set when extending this class
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*/
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protected $table;
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/**
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* Default columns. MUST be set when extending this class. Each table
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* column MUST be defined with a default value. Default value may be null.
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*/
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protected $defaultProperties;
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/**
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* Properties as loaded from db
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*/
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protected $loadedProperties;
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/**
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* Whether at least one property has been modified
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*/
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protected $hasBeenModified = false;
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/**
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* Whether this object has been loaded from db
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*/
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protected $loadedFromDb = false;
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/**
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* Object properties
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*/
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protected $properties = array();
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/**
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* Property names that have been modified since object creation
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*/
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protected $modifiedProperties = array();
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/**
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* Unique key name, could be primary
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*/
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protected $keyName;
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/**
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* Set this to an eventual autoincrementing column. May equal $keyName
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*/
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protected $autoincKeyName;
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/**
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* Filled with object instances when prefetchAll is used
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*/
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protected static $prefetched = array();
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/**
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* object_name => id map for prefetched objects
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*/
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protected static $prefetchedNames = array();
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/**
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* Constructor is not accessible and should not be overridden
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*/
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protected function __construct()
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{
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if ($this->table === null
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|| $this->keyName === null
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|| $this->defaultProperties === null
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) {
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throw new IE("Someone extending this class didn't RTFM");
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}
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$this->properties = $this->defaultProperties;
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$this->beforeInit();
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}
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public function getTableName()
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{
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return $this->table;
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}
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/**
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* Kann überschrieben werden, um Kreuz-Checks usw vor dem Speichern durch-
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* zuführen - die Funktion ist aber public und erlaubt jederzeit, die Kon-
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* sistenz eines Objektes bei bedarf zu überprüfen.
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*
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* @return boolean Ob der Wert gültig ist
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*/
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public function validate()
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{
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return true;
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}
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/************************************************************************\
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* Nachfolgend finden sich ein paar Hooks, die bei Bedarf überschrieben *
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* werden können. Wann immer möglich soll darauf verzichtet werden, *
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* andere Funktionen (wie z.B. store()) zu überschreiben. *
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\************************************************************************/
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/**
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* Wird ausgeführt, bevor die eigentlichen Initialisierungsoperationen
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* (laden von Datenbank, aus Array etc) starten
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*
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* @return void
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*/
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protected function beforeInit() {}
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/**
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* Wird ausgeführt, nachdem mittels ::factory() ein neues Objekt erstellt
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* worden ist.
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*
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* @return void
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*/
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protected function onFactory() {}
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/**
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* Wird ausgeführt, nachdem mittels ::factory() ein neues Objekt erstellt
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* worden ist.
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*
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* @return void
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*/
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protected function onLoadFromDb() {}
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/**
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* Wird ausgeführt, bevor ein Objekt abgespeichert wird. Die Operation
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* wird aber auf jeden Fall durchgeführt, außer man wirft eine Exception
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*
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* @return void
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*/
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protected function beforeStore() {}
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/**
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* Wird ausgeführt, nachdem ein Objekt erfolgreich gespeichert worden ist
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*
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* @return void
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*/
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protected function onStore() {}
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/**
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* Wird ausgeführt, nachdem ein Objekt erfolgreich der Datenbank hinzu-
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* gefügt worden ist
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*
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* @return void
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*/
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protected function onInsert() {}
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/**
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* Wird ausgeführt, nachdem bestehendes Objekt erfolgreich der Datenbank
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* geändert worden ist
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*
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* @return void
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*/
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protected function onUpdate() {}
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/**
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* Wird ausgeführt, bevor ein Objekt gelöscht wird. Die Operation wird
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* aber auf jeden Fall durchgeführt, außer man wirft eine Exception
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*
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* @return void
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*/
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protected function beforeDelete() {}
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/**
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* Wird ausgeführt, nachdem bestehendes Objekt erfolgreich aud der
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* Datenbank gelöscht worden ist
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*
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* @return void
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*/
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protected function onDelete() {}
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/**
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* Set database connection
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*
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* @param DbConnection $connection Database connection
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*
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* @return self
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*/
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public function setConnection(DbConnection $connection)
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{
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$this->connection = $connection;
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$this->db = $connection->getDbAdapter();
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return $this;
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}
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/**
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* Getter
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*
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* @param string $property Property
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*
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* @return mixed
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*/
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public function get($property)
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{
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$func = 'get' . ucfirst($property);
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if (substr($func, -2) === '[]') {
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$func = substr($func, 0, -2);
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}
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// TODO: id check avoids collision with getId. Rethink this.
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if ($property !== 'id' && method_exists($this, $func)) {
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return $this->$func();
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}
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if (! array_key_exists($property, $this->properties)) {
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throw new IE('Trying to get invalid property "%s"', $property);
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}
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return $this->properties[$property];
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}
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public function hasProperty($key)
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{
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if (array_key_exists($key, $this->properties)) {
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return true;
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}
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$func = 'get' . ucfirst($key);
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if (substr($func, -2) === '[]') {
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$func = substr($func, 0, -2);
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}
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if (method_exists($this, $func)) {
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return true;
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}
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return false;
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}
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/**
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* Generic setter
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*
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* @param string $property
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* @param mixed $value
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*
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* @return array
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*/
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public function set($key, $value)
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{
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$key = (string) $key;
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if ($value === '') {
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$value = null;
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}
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$func = 'validate' . ucfirst($key);
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if (method_exists($this, $func) && $this->$func($value) !== true) {
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throw new IE('Got invalid value "%s" for "%s"', $value, $key);
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}
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$func = 'munge' . ucfirst($key);
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if (method_exists($this, $func)) {
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$value = $this->$func($value);
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}
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$func = 'set' . ucfirst($key);
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if (substr($func, -2) === '[]') {
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$func = substr($func, 0, -2);
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}
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if (method_exists($this, $func)) {
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return $this->$func($value);
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}
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if (! $this->hasProperty($key)) {
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throw new IE('Trying to set invalid key %s', $key);
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}
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if ($value === $this->get($key)) {
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return $this;
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}
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if ($key === $this->getAutoincKeyName() && $this->hasBeenLoadedFromDb()) {
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throw new IE('Changing autoincremental key is not allowed');
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}
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return $this->reallySet($key, $value);
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}
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protected function reallySet($key, $value)
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{
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if ($value === $this->$key) {
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return $this;
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}
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$this->hasBeenModified = true;
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$this->modifiedProperties[$key] = true;
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$this->properties[$key] = $value;
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return $this;
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}
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/**
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* Magic getter
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*
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* @return mixed
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*/
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public function __get($key)
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{
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return $this->get($key);
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}
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/**
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* Magic setter
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*
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* @param string $key Key
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* @param mixed $val Value
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*
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* @return void
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*/
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public function __set($key, $val)
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{
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$this->set($key, $val);
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}
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/**
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* Magic isset check
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*
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* @return boolean
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*/
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public function __isset($key)
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{
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return array_key_exists($key, $this->properties);
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}
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/**
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* Magic unsetter
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*
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* @return void
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*/
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public function __unset($key)
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{
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if (! array_key_exists($key, $this->properties)) {
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throw new IE('Trying to unset invalid key');
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}
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$this->properties[$key] = $this->defaultProperties[$key];
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}
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/**
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* Führt die Operation set() für jedes Element (key/value Paare) der über-
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* gebenen Arrays aus
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*
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* @param array $data Array mit den zu setzenden Daten
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* @return self
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*/
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public function setProperties($props)
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{
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if (! is_array($props)) {
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throw new IE('Array required, got %s', gettype($props));
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}
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foreach ($props as $key => $value) {
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$this->set($key, $value);
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}
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return $this;
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}
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/**
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* Return an array with all object properties
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*
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* @return array
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*/
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public function getProperties()
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{
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return $this->properties;
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}
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public function listProperties()
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{
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return array_keys($this->properties);
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}
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/**
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* Return all properties that changed since object creation
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*
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* @return array
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*/
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public function getModifiedProperties()
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{
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$props = array();
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foreach (array_keys($this->modifiedProperties) as $key) {
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if ($key === $this->autoincKeyName) continue;
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$props[$key] = $this->properties[$key];
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}
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return $props;
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}
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/**
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* Whether this object has been modified
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*
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* @return bool
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*/
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public function hasBeenModified()
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{
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return $this->hasBeenModified;
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}
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/**
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* Whether the given property has been modified
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*
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* @param string $key Property name
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* @return boolean
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*/
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protected function hasModifiedProperty($key)
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{
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return array_key_exists($key, $this->modifiedProperties);
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}
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/**
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* Unique key name
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*
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* @return string
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*/
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public function getKeyName()
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{
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return $this->keyName;
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}
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/**
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* Autoinc key name
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*
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* @return string
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*/
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public function getAutoincKeyName()
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{
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return $this->autoincKeyName;
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}
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public function getKeyParams()
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{
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$params = array();
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$key = $this->getKeyName();
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if (is_array($key)) {
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foreach ($key as $k) {
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$params[$k] = $this->get($k);
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}
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} else {
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$params[$key] = $this->get($this->keyName);
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}
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return $params;
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}
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/**
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* Return the unique identifier
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*
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* // TODO: may conflict with ->id
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*
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* @return string
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*/
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public function getId()
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{
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// TODO: Doesn't work for array() / multicol key
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if (is_array($this->keyName)) {
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$id = array();
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foreach ($this->keyName as $key) {
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if (! isset($this->properties[$key])) {
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return null; // Really?
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}
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$id[$key] = $this->properties[$key];
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}
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return $id;
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} else {
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if (isset($this->properties[$this->keyName]))
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{
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return $this->properties[$this->keyName];
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}
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}
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return null;
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}
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/**
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* Get the autoinc value if set
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*
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* @return string
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*/
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public function getAutoincId()
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{
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if (isset($this->properties[$this->autoincKeyName]))
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{
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return $this->properties[$this->autoincKeyName];
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}
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return null;
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}
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/**
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* Liefert das benutzte Datenbank-Handle
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*
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* @return Zend_Db_Adapter_Abstract
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*/
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public function getDb()
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{
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return $this->db;
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}
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public function hasConnection()
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{
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return $this->connection !== null;
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}
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public function getConnection()
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{
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return $this->connection;
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}
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/**
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* Lädt einen Datensatz aus der Datenbank und setzt die entsprechenden
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* Eigenschaften dieses Objekts
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*
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* @return self
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*/
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protected function loadFromDb()
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{
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$select = $this->db->select()->from($this->table)->where($this->createWhere());
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$properties = $this->db->fetchRow($select);
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if (empty($properties)) {
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throw new NotFoundError(
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'Got no "%s" data for: %s (%s)',
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$this->table,
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$this->getLogId(),
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$this->createWhere()
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);
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}
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return $this->setDbProperties($properties);
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}
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protected function setDbProperties($properties)
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{
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foreach ($properties as $key => $val) {
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if (! array_key_exists($key, $this->properties)) {
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throw new IE(
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'Trying to set invalid %s key "%s". DB schema change?',
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$this->table,
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$key
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);
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}
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if ($val === null) {
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$this->properties[$key] = null;
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} elseif (is_resource($val)) {
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$this->properties[$key] = stream_get_contents($val);
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} else {
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$this->properties[$key] = (string) $val;
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}
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}
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$this->loadedFromDb = true;
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$this->loadedProperties = $this->properties;
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$this->hasBeenModified = false;
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$this->onLoadFromDb();
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return $this;
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}
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public function getOriginalProperties()
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{
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return $this->loadedProperties;
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}
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public function hasBeenLoadedFromDb()
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{
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return $this->loadedFromDb;
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}
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/**
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* Ändert den entsprechenden Datensatz in der Datenbank
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*
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* @return int Anzahl der geänderten Zeilen
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*/
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protected function updateDb()
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{
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$properties = $this->getModifiedProperties();
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if (empty($properties)) {
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// Fake true, we might have manually set this to "modified"
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return true;
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}
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// TODO: Remember changed data for audit and log
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return $this->db->update(
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$this->table,
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$properties,
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$this->createWhere()
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);
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}
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/**
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* Fügt der Datenbank-Tabelle einen entsprechenden Datensatz hinzu
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*
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* @return int Anzahl der betroffenen Zeilen
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*/
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protected function insertIntoDb()
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{
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$properties = $this->getProperties();
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if ($this->autoincKeyName !== null) {
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unset($properties[$this->autoincKeyName]);
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}
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if ($this->connection->getDbType() === 'pgsql') {
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foreach ($properties as $key => $value) {
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if (preg_match('/checksum$/', $key)) {
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$properties[$key] = Util::pgBinEscape($value);
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}
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}
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}
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return $this->db->insert($this->table, $properties);
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}
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/**
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* Store object to database
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*
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* @return boolean Whether storing succeeded
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*/
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public function store(DbConnection $db = null)
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{
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if ($db !== null) {
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$this->setConnection($db);
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|
}
|
|
|
|
if ($this->validate() !== true) {
|
|
throw new IE('%s[%s] validation failed', $this->table, $this->getLogId());
|
|
}
|
|
|
|
if ($this->hasBeenLoadedFromDb() && ! $this->hasBeenModified()) {
|
|
return true;
|
|
}
|
|
|
|
$this->beforeStore();
|
|
$table = $this->table;
|
|
$id = $this->getId();
|
|
$result = false;
|
|
|
|
try {
|
|
if ($this->hasBeenLoadedFromDb()) {
|
|
if ($this->updateDb() !== false) {
|
|
$result = true;
|
|
$this->onUpdate();
|
|
} else {
|
|
throw new IE(
|
|
'FAILED storing %s "%s"',
|
|
$table,
|
|
$this->getLogId()
|
|
);
|
|
}
|
|
} else {
|
|
if ($id && $this->existsInDb()) {
|
|
throw new IE(
|
|
'Trying to recreate %s (%s)',
|
|
$table,
|
|
$this->getLogId()
|
|
);
|
|
}
|
|
|
|
if ($this->insertIntoDb()) {
|
|
$id = $this->getId();
|
|
if ($this->autoincKeyName) {
|
|
$this->properties[$this->autoincKeyName] = $this->db->lastInsertId();
|
|
if (! $id) {
|
|
$id = '[' . $this->properties[$this->autoincKeyName] . ']';
|
|
}
|
|
}
|
|
// $this->log(sprintf('New %s "%s" has been stored', $table, $id));
|
|
$this->onInsert();
|
|
$result = true;
|
|
} else {
|
|
throw new IE(
|
|
'FAILED to store new %s "%s"',
|
|
$table,
|
|
$this->getLogId()
|
|
);
|
|
}
|
|
}
|
|
|
|
} catch (Exception $e) {
|
|
if ($e instanceof IE) {
|
|
throw $e;
|
|
}
|
|
throw new IE(
|
|
'Storing %s[%s] failed: %s {%s}',
|
|
$this->table,
|
|
$this->getLogId(),
|
|
$e->getMessage(),
|
|
var_export($this->getProperties(), 1) // TODO: Remove properties
|
|
);
|
|
}
|
|
$this->modifiedProperties = array();
|
|
$this->hasBeenModified = false;
|
|
$this->onStore();
|
|
$this->loadedFromDb = true;
|
|
return $result;
|
|
}
|
|
|
|
|
|
/**
|
|
* Delete item from DB
|
|
*
|
|
* @return int Affected rows
|
|
*/
|
|
protected function deleteFromDb()
|
|
{
|
|
return $this->db->delete(
|
|
$this->table,
|
|
$this->createWhere()
|
|
);
|
|
}
|
|
|
|
protected function setKey($key)
|
|
{
|
|
$keyname = $this->getKeyName();
|
|
if (is_array($keyname)) {
|
|
if (! is_array($key)) {
|
|
throw new IE(
|
|
'%s has a multicolumn key, array required',
|
|
$this->table
|
|
);
|
|
}
|
|
foreach ($keyname as $k) {
|
|
if (! array_key_exists($k, $key)) {
|
|
// We allow for null in multicolumn keys:
|
|
$key[$k] = null;
|
|
}
|
|
$this->set($k, $key[$k]);
|
|
}
|
|
} else {
|
|
$this->set($keyname, $key);
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
protected function existsInDb()
|
|
{
|
|
$result = $this->db->fetchRow(
|
|
$this->db->select()->from($this->table)->where($this->createWhere())
|
|
);
|
|
return $result !== false;
|
|
}
|
|
|
|
protected function createWhere()
|
|
{
|
|
if ($id = $this->getAutoincId()) {
|
|
return $this->db->quoteInto(
|
|
sprintf('%s = ?', $this->autoincKeyName),
|
|
$id
|
|
);
|
|
}
|
|
|
|
$key = $this->getKeyName();
|
|
|
|
if (is_array($key) && ! empty($key)) {
|
|
$where = array();
|
|
foreach ($key as $k) {
|
|
if ($this->hasBeenLoadedFromDb()) {
|
|
if ($this->loadedProperties[$k] === null) {
|
|
$where[] = sprintf('%s IS NULL', $k);
|
|
} else {
|
|
$where[] = $this->db->quoteInto(
|
|
sprintf('%s = ?', $k),
|
|
$this->loadedProperties[$k]
|
|
);
|
|
}
|
|
} else {
|
|
if ($this->properties[$k] === null) {
|
|
$where[] = sprintf('%s IS NULL', $k);
|
|
} else {
|
|
$where[] = $this->db->quoteInto(
|
|
sprintf('%s = ?', $k),
|
|
$this->properties[$k]
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
return implode(' AND ', $where);
|
|
} else {
|
|
if ($this->hasBeenLoadedFromDb()) {
|
|
return $this->db->quoteInto(
|
|
sprintf('%s = ?', $key),
|
|
$this->loadedProperties[$key]
|
|
);
|
|
} else {
|
|
return $this->db->quoteInto(
|
|
sprintf('%s = ?', $key),
|
|
$this->properties[$key]
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
protected function getLogId()
|
|
{
|
|
$id = $this->getId();
|
|
if (is_array($id)) {
|
|
$logId = json_encode($id);
|
|
} else {
|
|
$logId = $id;
|
|
}
|
|
|
|
return $logId;
|
|
}
|
|
|
|
public function delete()
|
|
{
|
|
$table = $this->table;
|
|
|
|
if (! $this->hasBeenLoadedFromDb()) {
|
|
throw new IE(
|
|
'Cannot delete %s "%s", it has not been loaded from Db',
|
|
$table,
|
|
$this->getLogId()
|
|
);
|
|
}
|
|
|
|
if (! $this->existsInDb()) {
|
|
throw new IE(
|
|
'Cannot delete %s "%s", it does not exist',
|
|
$table,
|
|
$this->getLogId()
|
|
);
|
|
}
|
|
$this->beforeDelete();
|
|
if (! $this->deleteFromDb()) {
|
|
throw new IE(
|
|
'Deleting %s (%s) FAILED',
|
|
$table,
|
|
$this->getLogId()
|
|
);
|
|
}
|
|
// $this->log(sprintf('%s "%s" has been DELETED', $table, this->getLogId()));
|
|
$this->onDelete();
|
|
$this->loadedFromDb = false;
|
|
return true;
|
|
}
|
|
|
|
public function __clone()
|
|
{
|
|
$this->onClone();
|
|
$this->autoincKeyName = null;
|
|
$this->loadedFromDb = false;
|
|
$this->hasBeenModified = true;
|
|
}
|
|
|
|
protected function onClone()
|
|
{
|
|
}
|
|
|
|
public static function create($properties = array(), DbConnection $connection = null)
|
|
{
|
|
$class = get_called_class();
|
|
$obj = new $class();
|
|
if ($connection !== null) {
|
|
$obj->setConnection($connection);
|
|
}
|
|
$obj->setProperties($properties);
|
|
return $obj;
|
|
}
|
|
|
|
protected static function getPrefetched($key)
|
|
{
|
|
if (static::hasPrefetched($key)) {
|
|
return self::$prefetched[get_called_class()][$key];
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
protected static function hasPrefetched($key)
|
|
{
|
|
$class = get_called_class();
|
|
if (array_key_exists($class, self::$prefetched)) {
|
|
return array_key_exists($key, self::$prefetched[$class]);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public static function loadWithAutoIncId($id, DbConnection $connection)
|
|
{
|
|
if ($prefetched = static::getPrefetched($id)) {
|
|
return $prefetched;
|
|
}
|
|
|
|
$class = get_called_class();
|
|
$obj = new $class();
|
|
$obj->setConnection($connection)
|
|
->set($obj->autoincKeyName, $id)
|
|
->loadFromDb();
|
|
return $obj;
|
|
}
|
|
|
|
public static function load($id, DbConnection $connection)
|
|
{
|
|
if ($prefetched = static::getPrefetched($id)) {
|
|
return $prefetched;
|
|
}
|
|
|
|
$class = get_called_class();
|
|
$obj = new $class();
|
|
$obj->setConnection($connection)->setKey($id)->loadFromDb();
|
|
return $obj;
|
|
}
|
|
|
|
public static function loadAll(DbConnection $connection, $query = null, $keyColumn = null)
|
|
{
|
|
$objects = array();
|
|
$class = get_called_class();
|
|
$db = $connection->getDbAdapter();
|
|
|
|
if ($query === null) {
|
|
$dummy = new $class();
|
|
$select = $db->select()->from($dummy->table);
|
|
} else {
|
|
$select = $query;
|
|
}
|
|
|
|
$rows = $db->fetchAll($select);
|
|
|
|
foreach ($rows as $row) {
|
|
$obj = new $class();
|
|
$obj->setConnection($connection)->setDbProperties($row);
|
|
if ($keyColumn === null) {
|
|
$objects[] = $obj;
|
|
} else {
|
|
$objects[$row->$keyColumn] = $obj;
|
|
}
|
|
}
|
|
|
|
return $objects;
|
|
}
|
|
|
|
public static function prefetchAll(DbConnection $connection, $force = false)
|
|
{
|
|
$class = get_called_class();
|
|
|
|
if ($force || ! array_key_exists($class, self::$prefetched)) {
|
|
self::$prefetched[$class] = static::loadAll($connection);
|
|
}
|
|
|
|
return self::$prefetched[$class];
|
|
}
|
|
|
|
public static function exists($id, DbConnection $connection)
|
|
{
|
|
if (static::getPrefetched($id)) {
|
|
return true;
|
|
}
|
|
|
|
$class = get_called_class();
|
|
$obj = new $class();
|
|
$obj->setConnection($connection)->setKey($id);
|
|
return $obj->existsInDb();
|
|
}
|
|
}
|