125 lines
2.5 KiB
PHP
125 lines
2.5 KiB
PHP
<?php
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require_once("Question.class.php");
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class QuestionsFile
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{
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private $filename;
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private $treeXML;
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private $root_node;
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private $tmp = array();
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public function __construct($filename)
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{
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$this->filename = $filename;
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$this->reload();
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}
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/**
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* Load or reload the questions file.
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* Unsave changes will be erased.
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*/
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private function reload()
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{
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$this->treeXML = new DOMDocument('1.0', 'UTF-8');
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if (@$this->treeXML->load($this->filename))
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{
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$root_nodes = $this->treeXML->getElementsByTagName("questions");
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if ($root_nodes->length > 0)
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$this->root_node = $root_nodes->item(0);
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else
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throw Exception("Not a valid nemubot QuestionsFile.");
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}
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else
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{
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$this->root_node = $this->treeXML->createElement("questions");
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$this->treeXML->appendChild($this->root_node);
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}
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}
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/**
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* Add a new question into the file
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* @param $question The question object
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*/
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public function add_question($question)
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{
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$this->tmp[$question->getId()] = $question;
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}
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public function del_question($question)
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{
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unset($this->tmp[$question->getId()]);
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}
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/**
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* Get a question from its unique identifiant
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*/
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public function get_question($id)
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{
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if (isset($this->tmp[$id]))
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return $this->tmp[$id];
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else
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{
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$q = $this->treeXML->getElementById($id);
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if (isset($q))
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{
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$this->root_node->removeChild($q);
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$this->tmp[$id] = new Question($q);
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return $this->tmp[$id];
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}
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}
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return NULL;
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}
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public function get_ids()
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{
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$ret = array();
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$qs = $this->treeXML->getElementsByTagName("question");
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foreach($qs as $q)
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$ret[] = $q->getAttribute("xml:id");
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return $ret;
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}
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public function get_questions()
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{
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$ret = array();
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$qs = $this->treeXML->getElementsByTagName("question");
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foreach($qs as $q)
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$ret[] = new Question($q);
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return $ret;
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}
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/**
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* Write changes into the real file
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*/
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public function save($newfilename = null)
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{
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foreach ($this->tmp as $question)
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{
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$qnode = $question->to_xml($this->treeXML);
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$this->root_node->appendChild($qnode);
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}
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if (!empty($newfilename))
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$this->filename = $newfilename;
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$this->treeXML->formatOutput = true;
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$this->treeXML->save($this->filename);
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}
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}
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/*
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$file = new QuestionsFile("questions.xml");
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foreach ($file->get_ids() as $id)
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{
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$q = $file->get_question($id);
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echo $q->convert()."<br>";
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}
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$file->save();
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//*/
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?>
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