127 lines
2.9 KiB
PHP
Executable File
127 lines
2.9 KiB
PHP
Executable File
<?php
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/**
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* This is a class used to represent key->value pairs generated from database queries.
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* The query isn't actually executed until you need it.
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*
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* @package sapphire
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* @subpackage model
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*/
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class SQLMap extends Object implements IteratorAggregate {
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/**
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* The query used to generate the map.
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* @var SQLQuery
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*/
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protected $query;
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protected $keyField, $titleField;
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/**
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* Construct a SQLMap.
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* @param SQLQuery $query The query to generate this map. THis isn't executed until it's needed.
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*/
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public function __construct(SQLQuery $query, $keyField = "ID", $titleField = "Title") {
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if(!$query) {
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user_error('SQLMap constructed with null query.', E_USER_ERROR);
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}
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$this->query = $query;
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$this->keyField = $keyField;
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$this->titleField = $titleField;
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parent::__construct();
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}
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/**
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* Get the name of an item.
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* @param string|int $id The id of the item.
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* @return string
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*/
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public function getItem($id) {
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if($id) {
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$baseTable = reset($this->query->from);
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$this->query->where[] = "$baseTable.\"ID\" = $id";
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$record = $this->query->execute()->first();
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if($record) {
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$className = $record['ClassName'];
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$obj = new $className($record);
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return $obj->Title;
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}
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}
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}
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public function getIterator() {
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$this->genItems();
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return new SQLMap_Iterator($this->items->getIterator(), $this->keyField, $this->titleField);
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}
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/**
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* Get the items in this class.
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* @return DataObjectSet
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*/
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public function getItems() {
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$this->genItems();
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return $this->items;
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}
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/**
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* Generate the items in this map. This is used by
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* getItems() if the items have not been generated already.
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*/
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protected function genItems() {
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if(!isset($this->items)) {
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$this->items = new DataObjectSet();
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$items = $this->query->execute();
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foreach($items as $item) {
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$className = isset($item['RecordClassName']) ? $item['RecordClassName'] : $item['ClassName'];
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if(!$className) {
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user_error('SQLMap query could not retrieve className', E_USER_ERROR);
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}
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$this->items->push(new $className($item));
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}
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}
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}
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}
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/**
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* @package sapphire
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* @subpackage model
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*/
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class SQLMap_Iterator extends Object implements Iterator {
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protected $items;
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protected $keyField, $titleField;
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function __construct(Iterator $items, $keyField, $titleField) {
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$this->items = $items;
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$this->keyField = $keyField;
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$this->titleField = $titleField;
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}
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/*
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* Iterator functions - necessary for foreach to work
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*/
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public function rewind() {
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return $this->items->rewind() ? $this->items->rewind()->{$this->titleField} : null;
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}
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public function current() {
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return $this->items->current()->{$this->titleField};
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}
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public function key() {
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return $this->items->current()->{$this->keyField};
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}
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public function next() {
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$next = $this->items->next();
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return isset($next->{$this->titleField}) ? $next->{$this->titleField} : null;
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}
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public function valid() {
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return $this->items->valid();
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}
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}
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?>
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