Add questions manager class

Question.class.php

@@ -0,0 +1,82 @@
+<?php
+
+class Question
+{
+  private var $id;
+  private var $question;
+  private var $answers = array();
+  private var $added_time;
+  private var $validated = false;
+  private var $validator = "";
+
+  public function __construct($node = null)
+  {
+    $this->id = $node->getAttribute("id");
+    $this->added_time = $node->getAttribute("addedtime");
+    if (intval($node->getAttribute("validated")))
+      $this->validated = true;
+    $this->validator = $node->getAttribute("validator");
+    $this->question = $node->getAttribute("question");
+
+    $answers = $node->getElementByTagName("answer");
+    for ($i = 0; $i < $answers->length; $i++)
+      $this->answers[] = $answers->item($i)->getAttribute("answer");
+  }
+
+  public static function new_Question($question, $answers = null)
+  {
+    $q = new Question();
+    $q->id = md5(time().$question);
+    $q->added_time = time();
+    $q->question = $question;
+
+    if (!empty($answers))
+    {
+      if (is_array($answers))
+      {
+        foreach ($answers => $ans)
+          $this->answers[] = $ans;
+      }
+      else
+        $this->answers[] = $answers;
+    }
+
+    return $q;
+  }
+
+  /**
+   * Generate and fill an answer node
+   * @param $answer The answer string
+   * @param $scrore The score given by this answer
+   */
+  private function gen_anode($answer, $score = 1)
+  {
+    $anode = $this->treeXML->createElement("answer");
+
+    $qnode->setAttribute("answer", $answer);
+    $qnode->setAttribute("score", $score);
+
+    return $anode;
+  }
+
+  /**
+   * Generate XML corresponding to this question
+   */
+  public function to_xml($root)
+  {
+    $qnode = $root->createElement("question");
+
+    $qnode->setAttribute("id", $this->id);
+    $qnode->setAttribute("addedtime", $this->added_time);
+    $qnode->setAttribute("validated", $this->validated);
+    $qnode->setAttribute("validator", $this->validator);
+    $qnode->setAttribute("question", $this->question);
+
+    foreach ($answers => $ans)
+      $qnode->appendChild(gen_anode($ans));
+
+    return $qnode;
+  }
+}
+
+?>

QuestionsFile.class.php

@@ -0,0 +1,71 @@
+<?php
+
+require("Question.class.php");
+
+class QuestionsFile
+{
+  private var $filename;
+  private var $treeXML;
+
+  public function __construct($filename)
+  {
+    $this->filename = $filename;
+    $this->reload();
+  }
+
+  /**
+   * Load or reload the questions file.
+   * Unsave changes will be erased.
+   */
+  private function reload()
+  {
+    $this->treeXML = new DOMDocument('1.0', 'UTF-8');
+    $this->treeXML->formatOutput   = true;
+
+    if (isfile($this->filename))
+    {
+      $this->treeXML->load($this->filename);
+
+      $root_nodes = $this->treeXML->getElementsByTagName("questions");
+      if ($root_node->length > 0)
+        $this->root_node = $root_nodes->item(0);
+      else
+        throw Exception("Not a valid nemubot QuestionsFile.");
+    }
+    else
+    {
+      $this->root_node = $this->treeXML->createElement("questions");
+      $this->treeXML->appendChild($this->root_node);
+    }
+  }
+
+  /**
+   * Add a new question into the file
+   * @param $question The question object
+   */
+  public function add_question($question)
+  {
+    $this->root_node->appendChild($question->to_xml($this->root_node));
+  }
+
+  /**
+   * Get a question from its unique identifiant
+   */
+  public function get_question($id)
+  {
+    return new Question($this->root_node->getElementById($id));
+  }
+
+  /**
+   * Write changes into the real file
+   */
+  public function save($newfilename = null)
+  {
+    if (!empty($newfilename))
+      $this->filename = $newfilename;
+
+    $this->treeXML->save($this->filename);
+  }
+}
+
+?>