1 files changed, 119 insertions, 0 deletions
diff --git a/inc/message.inc.php b/inc/message.inc.php
new file mode 100644
index 0000000..7decc12
--- /dev/null
+++ b/inc/message.inc.php
@@ -0,0 +1,119 @@
+<?php
+
+class Message
+{
+	private static $list = array();
+	private static $alreadyDisplayed = array();
+	private static $flushed = false;
+
+	/**
+	 * Add error message to page. If messages have not been flushed
+	 * yet, it will be added to the queue, otherwise it will be added
+	 * in place during rendering.
+	 */
+	public static function addError($id)
+	{
+		self::add('error', $id, func_get_args());
+	}
+
+	public static function addWarning($id)
+	{
+		self::add('warning', $id, func_get_args());
+	}
+
+	public static function addInfo($id)
+	{
+		self::add('info', $id, func_get_args());
+	}
+
+	public static function addSuccess($id)
+	{
+		self::add('success', $id, func_get_args());
+	}
+
+	/**
+	 * Internal function that adds a message. Used by
+	 * addError/Success/Info/... above.
+	 */
+	private static function add($type, $id, $params)
+	{
+		self::$list[] = array(
+			'type'   => $type,
+			'id'     => $id,
+			'params' => array_slice($params, 1)
+		);
+		if (self::$flushed) self::renderList();
+	}
+
+	/**
+	 * Render all currently queued messages, flushing the queue.
+	 * After calling this, any further calls to add* will be rendered in
+	 * place in the current page output.
+	 */
+	public static function renderList()
+	{
+		// Non-Ajax
+		foreach (self::$list as $item) {
+			$message = $item['id']; // Dictionary::getMessage($item['id']);
+			foreach ($item['params'] as $index => $text) {
+				$message = str_replace('{{' . $index . '}}', '<b>' . htmlspecialchars($text) . '</b>', $message);
+			}
+			Render::addTemplate('messagebox-' . $item['type'], array('message' => $message));
+			self::$alreadyDisplayed[] = $item;
+		}
+		self::$list = array();
+		self::$flushed = true;
+	}
+
+	/**
+	 * Get all queued messages, flushing the queue.
+	 * Useful in api/ajax mode.
+	 */
+	public static function asString()
+	{
+		$return = '';
+		foreach (self::$list as $item) {
+			$message = $item['id']; // Dictionary::getMessage($item['id']);
+			foreach ($item['params'] as $index => $text) {
+				$message = str_replace('{{' . $index . '}}', $text, $message);
+			}
+			$return .= '[' . $item['type'] . ']: ' . $message . "\n";
+			self::$alreadyDisplayed[] = $item;
+		}
+		self::$list = array();
+		return $return;
+	}
+
+	/**
+	 * Deserialize any messages from the current HTTP request and
+	 * place them in the message queue.
+	 */
+	public static function fromRequest()
+	{
+		$messages = is_array($_REQUEST['message']) ? $_REQUEST['message'] : array($_REQUEST['message']);
+		foreach ($messages as $message) {
+			$data = explode('|', $message);
+			if (count($data) < 2 || !preg_match('/^(error|warning|info|success)$/', $data[0])) continue;
+			self::add($data[0], $data[1], array_slice($data, 1));
+		}
+	}
+
+	/**
+	 * Turn the current message queue into a serialized version,
+	 * suitable for appending to a GET or POST request
+	 */
+	public static function toRequest()
+	{
+		$parts = array();
+		foreach (array_merge(self::$list, self::$alreadyDisplayed) as $item) {
+			$str = 'message[]=' . urlencode($item['type'] . '|' .$item['id']);
+			if (!empty($item['params'])) {
+				$str .= '|' . implode('|', $item['params']);
+			}
+			$parts[] = $str;
+		}
+		return implode('&', $parts);
+	}
+
+}
+