<?php
function admin_new_questions() {
	global $user, $privileges;

	if (in_array("admin_questions", $privileges)) {
		$new_messages = sql_num_query("SELECT * FROM `Questions` WHERE `AID`=0");

		if ($new_messages > 0)
			return '<p class="notice"><a href="' . page_link_to("admin_questions") . '">There are unanswered questions!</a></p><hr />';
	}

	return "";
}

function admin_questions() {
	global $user;

	if (!isset ($_REQUEST['action'])) {
		$open_questions = "";
		$questions = sql_select("SELECT * FROM `Questions` WHERE `AID`=0");
		foreach ($questions as $question) {
			$open_questions .= '<tr><td>' . UID2Nick($question['UID']) . '</td><td>' . str_replace("\n", '<br />', $question['Question']) . '</td>';
			$open_questions .= '<td><form action="' . page_link_to("admin_questions") . '&action=answer" method="post"><textarea name="answer"></textarea><input type="hidden" name="id" value="' . $question['QID'] . '" /><br /><input type="submit" name="submit" value="Send" /></form></td>';
			$open_questions .= '<td><a href="' . page_link_to("admin_questions") . '&action=delete&id=' . $question['QID'] . '">Delete</a></td><tr>';
		}

		$answered_questions = "";
		$questions = sql_select("SELECT * FROM `Questions` WHERE `AID`>0");
		foreach ($questions as $question) {
			$answered_questions .= '<tr><td>' . UID2Nick($question['UID']) . '</td><td>' . str_replace("\n", '<br />', $question['Question']) . '</td>';
			$answered_questions .= '<td>' . UID2Nick($question['AID']) . '</td><td>' . str_replace("\n", '<br />', $question['Answer']) . '</td>';
			$answered_questions .= '<td><a href="' . page_link_to("admin_questions") . '&action=delete&id=' . $question['QID'] . '">Delete</a></td><tr>';
		}

		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.");

				$question = sql_select("SELECT * FROM `Questions` WHERE `QID`=" . sql_escape($id) . " LIMIT 1");
				if (count($question) > 0 && $question[0]['AID'] == "0") {
					$answer = trim(preg_replace("/([^\p{L}\p{P}\p{Z}\p{N}\n]{1,})/ui", '', strip_tags($_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");
						header("Location: " . page_link_to("admin_questions"));
					} else
						return error("Please enter an answer!");
				} else
					return error("No question found.");
				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.");

				$question = sql_select("SELECT * FROM `Questions` WHERE `QID`=" . sql_escape($id) . " LIMIT 1");
				if (count($question) > 0) {
					sql_query("DELETE FROM `Questions` WHERE `QID`=" . sql_escape($id) . " LIMIT 1");
					header("Location: " . page_link_to("admin_questions"));
				} else
					return error("No question found.");
				break;
		}
	}
}
?>