1 files changed, 137 insertions, 0 deletions
diff --git a/modules-available/baseconfig/inc/configholder.inc.php b/modules-available/baseconfig/inc/configholder.inc.php
new file mode 100644
index 00000000..e5856128
--- /dev/null
+++ b/modules-available/baseconfig/inc/configholder.inc.php
@@ -0,0 +1,137 @@
+<?php
+
+class ConfigHolder
+{
+	private static $config = [];
+
+	private static $context = '';
+
+	private static $postHooks = [];
+
+	public static function setContext($id, $resolver = false)
+	{
+		$tmp = ['id' => $id, 'resolver' => $resolver];
+		self::$context =& $tmp;
+	}
+
+	/**
+	 * @param string $key config variable name
+	 * @param false|string|array $value false to unset, string value, or array with keys value and displayvalue
+	 * @param int $prio priority of this value, in case the same key gets set multiple times
+	 */
+	public static function add($key, $value, $prio = 0)
+	{
+		if (!isset(self::$config[$key])) {
+			self::$config[$key] = [];
+		}
+		$new = [
+			'prio' => $prio,
+			'context' => &self::$context,
+		];
+		if (is_array($value)) {
+			$new['value'] = $value['value'];
+			$new['displayvalue'] = $value['displayvalue'];
+		} else {
+			$new['value'] = $value;
+		}
+		if (empty(self::$config[$key]) || self::$config[$key][0]['prio'] > $prio) {
+			// Existing is higher, append new one
+			array_push(self::$config[$key], $new);
+		} else {
+			// New one has highest prio or matches existing, put in front
+			array_unshift(self::$config[$key], $new);
+		}
+	}
+
+	public static function get($key)
+	{
+		if (!isset(self::$config[$key]))
+			return false;
+		return self::$config[$key][0]['value'];
+	}
+
+	/**
+	 * @param callable $func
+	 */
+	public static function addPostHook($func)
+	{
+		self::$postHooks[] = array('context' => &self::$context, 'function' => $func);
+	}
+
+	public static function applyPostHooks()
+	{
+		foreach (self::$postHooks as $hook) {
+			$newContext = $hook['context'];
+			$newContext['post'] = true;
+			self::$context =& $newContext;
+			$hook['function']();
+		}
+		self::$postHooks = [];
+	}
+
+	public static function getRecursiveConfig($prettyPrint = true)
+	{
+		$ret = [];
+		foreach (self::$config as $key => $list) {
+			$last = false;
+			foreach ($list as $entry) {
+				if ($last !== false && $last['context']['id'] === '<global>'
+						&& $entry['context']['id'] === '<default>' && $last['value'] === $entry['value'])
+					continue;
+				$cb =& $entry['context']['resolver'];
+				$valueKey = 'value';
+				if ($prettyPrint && is_callable($cb)) {
+					$data = $cb($entry['context']['id']);
+					$name = $data['name'];
+					if (isset($data['locationid']) && isset($entry['displayvalue'])
+							&& User::hasPermission('.baseconfig.view', $data['locationid'])) {
+						$valueKey = 'displayvalue';
+					}
+				} else {
+					$name = $entry['context']['id'];
+				}
+				$ret[$key][] = ['name' => $name, 'value' => $entry[$valueKey]];
+				$last = $entry;
+			}
+		}
+		return $ret;
+	}
+
+	public static function outputConfig()
+	{
+		foreach (self::$config as $key => $list) {
+			echo str_pad('# ' . $key . ' ', 35, '#', STR_PAD_BOTH), "\n";
+			foreach ($list as $pos => $item) {
+				$ctx = $item['context']['id'];
+				if (isset($item['context']['post'])) {
+					$ctx .= '[post-hook]';
+				}
+				$ctx .= ' :: ' . $item['prio'];
+				if ($pos != 0 || $item['value'] === false) {
+					echo '# (', $ctx, ')';
+					if ($pos == 0) {
+						echo " <disabled this setting>\n";
+					} else {
+						echo " <overridden>\n";
+					}
+				} else {
+					echo $key, "='", self::escape($item['value']), "'\n";
+					echo '# (', $ctx, ") <active>\n";
+				}
+			}
+		}
+	}
+
+	/**
+	 * Escape given string so it is a valid string in sh that can be surrounded
+	 * by single quotes ('). This basically turns _'_ into _'"'"'_
+	 *
+	 * @param string $string input
+	 * @return string escaped sh string
+	 */
+	private static function escape($string)
+	{
+		return str_replace("'", "'\"'\"'", $string);
+	}
+
+}