Page_Iterator.php

gehe zur Dokumentation dieser Datei

<?php
require_once('base/Page.php');

class Page_Iterator implements Iterator, Countable
{
    private  $_db; 
    private  $_site; 
    private $_firstRun = true; 
    private $_haltId = 0; 
    public  $page; 
    public function Page_Iterator($site='', $db='')
    {
        $this->_site = $site;
        $this->_db = $db;
    }

    public function nextPage()
    {
        $this->_firstRun = false;
        if ($this->_db && $this->_db->nextRecord())
        { // Wenn noch ein Eintrag existiert, wird ein Page Objekt erzeugt.
            while ($this->_haltId) {
                if ($this->_db->Record['id'] == $this->_haltId) {
                    $this->_haltId = 0;
                }
                if (!$this->_db->nextRecord()) {
                    return false;
                }
            }
            $class = $this->_site->getPageClass($this->_db->Record['type']);
            return $this->page = new $class($this->_site, $this->_db->Record);
        }
        unset($this->page); // Die Funktion valid() testet auf isset($this->page).
        return null;
    }

    public function numRecords()
    {
        return $this->_db?$this->_db->numRecords():0;
    }

    function current()
    {
        return $this->page;
    }

    function next()
    {
        return $this->nextPage();
    }

    function key()
    {
        return $this->_db->key();
    }

    function valid()
    {
        return isset($this->page);
    }

    function rewind()
    {
        if ($this->_firstRun) {
            return $this->nextPage();
        }
        $this->_db->rewind();
        if ($this->_db->Record !== null) {
            $class = $this->_site->getPageClass($this->_db->Record['type']);
            return $this->page = new $class($this->_site, $this->_db->Record);
        }
        unset($this->page); // Die Funktion valid() testet auf isset($this->page).
        return null;
    }

    function getDb()
    {
        return $this->_db;
    }

    public function setHaltId($id) {
        $this->_haltId = $id;
    }

    public function __toString()
    {
        return 'Page_Iterator('.$this->page.')';
    }

    public function count() {
        return $this->numRecords();
    }
}