70 lines
1.5 KiB
PHP
70 lines
1.5 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 $root_node;
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public function __construct($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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$this->treeXML = new DOMDocument('1.0', 'UTF-8');
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$this->treeXML->formatOutput = true;
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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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$this->root_node->appendChild($question->to_xml($this->treeXML));
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}
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/**
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* Get a question from its unique identifiant
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*/
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public function get_question($id)
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{
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return new Question($this->treeXML->getElementById($id));
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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($newfilename = null)
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{
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if (!empty($newfilename))
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$this->filename = $newfilename;
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$this->treeXML->save($this->filename);
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}
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}
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?>
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