<?php
function admin_questions_title() {
  return _("Answer questions");
}

function admin_new_questions() {
  global $user, $privileges;
  
  if (in_array("admin_questions", $privileges)) {
    $new_messages = sql_num_query("SELECT * FROM `Questions` WHERE `AID` IS NULL");
    
    if ($new_messages > 0)
      info('<a href="' . page_link_to("admin_questions") . '">Es gibt unbeantwortete Fragen!</a>');
  }
  
  return "";
}

function admin_questions() {
  global $user;
  
  if (! isset($_REQUEST['action'])) {
    $open_questions = "";
    $questions = sql_select("SELECT * FROM `Questions` WHERE `AID` IS NULL");
    foreach ($questions as $question) {
      $user_source = User($question['UID']);
      if ($user_source === false)
        engelsystem_error("Unable to load user.");
      
      $open_questions .= template_render('../templates/admin_question_unanswered.html', array(
          'question_nick' => User_Nick_render($user_source),
          'question_id' => $question['QID'],
          'link' => page_link_to("admin_questions"),
          'question' => str_replace("\n", '<br />', $question['Question']) 
      ));
    }
    
    $answered_questions = "";
    $questions = sql_select("SELECT * FROM `Questions` WHERE NOT `AID` IS NULL");
    
    foreach ($questions as $question) {
      $user_source = User($question['UID']);
      if ($user_source === false)
        engelsystem_error("Unable to load user.");
      
      $answer_user_source = User($question['AID']);
      if ($answer_user_source === false)
        engelsystem_error("Unable to load user.");
      
      $answered_questions .= template_render('../templates/admin_question_answered.html', array(
          'question_id' => $question['QID'],
          'question_nick' => User_Nick_render($user_source),
          'question' => str_replace("\n", "<br />", $question['Question']),
          'answer_nick' => User_Nick_render($answer_user_source),
          'answer' => str_replace("\n", "<br />", $question['Answer']),
          'link' => page_link_to("admin_questions") 
      ));
    }
    
    return template_render('../templates/admin_questions.html', array(
        'link' => page_link_to("admin_questions"),
        'open_questions' => $open_questions,
        'answered_questions' => $answered_questions 
    ));
  } else {
    switch ($_REQUEST['action']) {
      case 'answer':
        if (isset($_REQUEST['id']) && preg_match("/^[0-9]{1,11}$/", $_REQUEST['id']))
          $id = $_REQUEST['id'];
        else
          return error("Incomplete call, missing Question ID.", true);
        
        $question = sql_select("SELECT * FROM `Questions` WHERE `QID`=" . sql_escape($id) . " LIMIT 1");
        if (count($question) > 0 && $question[0]['AID'] == null) {
          $answer = trim(preg_replace("/([^\p{L}\p{P}\p{Z}\p{N}\n]{1,})/ui", '', strip_tags($_REQUEST['answer'])));
          
          if ($answer != "") {
            sql_query("UPDATE `Questions` SET `AID`=" . sql_escape($user['UID']) . ", `Answer`='" . sql_escape($answer) . "' WHERE `QID`=" . sql_escape($id) . " LIMIT 1");
            engelsystem_log("Question " . $question[0]['Question'] . " answered: " . $answer);
            redirect(page_link_to("admin_questions"));
          } else
            return error("Gib eine Antwort ein!", true);
        } else
          return error("No question found.", true);
        break;
      case 'delete':
        if (isset($_REQUEST['id']) && preg_match("/^[0-9]{1,11}$/", $_REQUEST['id']))
          $id = $_REQUEST['id'];
        else
          return error("Incomplete call, missing Question ID.", true);
        
        $question = sql_select("SELECT * FROM `Questions` WHERE `QID`=" . sql_escape($id) . " LIMIT 1");
        if (count($question) > 0) {
          sql_query("DELETE FROM `Questions` WHERE `QID`=" . sql_escape($id) . " LIMIT 1");
          engelsystem_log("Question deleted: " . $question[0]['Question']);
          redirect(page_link_to("admin_questions"));
        } else
          return error("No question found.", true);
        break;
    }
  }
}
?>