1 files changed, 131 insertions, 0 deletions
diff --git a/includes/Hooks.php b/includes/Hooks.php
new file mode 100644
index 00000000..4daffaf3
--- /dev/null
+++ b/includes/Hooks.php
@@ -0,0 +1,131 @@
+<?php
+/**
+ * Hooks.php -- a tool for running hook functions
+ * Copyright 2004, 2005 Evan Prodromou <evan@wikitravel.org>.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ *
+ * @author Evan Prodromou <evan@wikitravel.org>
+ * @package MediaWiki
+ * @see hooks.txt
+ */
+
+
+/**
+ * Because programmers assign to $wgHooks, we need to be very
+ * careful about its contents. So, there's a lot more error-checking
+ * in here than would normally be necessary.
+ */
+function wfRunHooks($event, $args = null) {
+
+	global $wgHooks;
+	$fname = 'wfRunHooks';
+
+	if (!is_array($wgHooks)) {
+		throw new MWException("Global hooks array is not an array!\n");
+		return false;
+	}
+
+	if (!array_key_exists($event, $wgHooks)) {
+		return true;
+	}
+
+	if (!is_array($wgHooks[$event])) {
+		throw new MWException("Hooks array for event '$event' is not an array!\n");
+		return false;
+	}
+
+	foreach ($wgHooks[$event] as $index => $hook) {
+
+		$object = NULL;
+		$method = NULL;
+		$func = NULL;
+		$data = NULL;
+		$have_data = false;
+
+		/* $hook can be: a function, an object, an array of $function and $data,
+		 * an array of just a function, an array of object and method, or an
+		 * array of object, method, and data.
+		 */
+
+		if (is_array($hook)) {
+			if (count($hook) < 1) {
+				throw new MWException("Empty array in hooks for " . $event . "\n");
+			} else if (is_object($hook[0])) {
+				$object =& $wgHooks[$event][$index][0];
+				if (count($hook) < 2) {
+					$method = "on" . $event;
+				} else {
+					$method = $hook[1];
+					if (count($hook) > 2) {
+						$data = $hook[2];
+						$have_data = true;
+					}
+				}
+			} else if (is_string($hook[0])) {
+				$func = $hook[0];
+				if (count($hook) > 1) {
+					$data = $hook[1];
+					$have_data = true;
+				}
+			} else {
+				var_dump( $wgHooks );
+				throw new MWException("Unknown datatype in hooks for " . $event . "\n");
+			}
+		} else if (is_string($hook)) { # functions look like strings, too
+			$func = $hook;
+		} else if (is_object($hook)) {
+			$object =& $wgHooks[$event][$index];
+			$method = "on" . $event;
+		} else {
+			throw new MWException("Unknown datatype in hooks for " . $event . "\n");
+		}
+
+		/* We put the first data element on, if needed. */
+
+		if ($have_data) {
+			$hook_args = array_merge(array($data), $args);
+		} else {
+			$hook_args = $args;
+		}
+
+
+		if ( isset( $object ) ) {
+			$func = get_class( $object ) . '::' . $method;
+		}
+
+		/* Call the hook. */
+		wfProfileIn( $func );
+		if( isset( $object ) ) {
+			$retval = call_user_func_array(array(&$object, $method), $hook_args);
+		} else {
+			$retval = call_user_func_array($func, $hook_args);
+		}
+		wfProfileOut( $func );
+
+		/* String return is an error; false return means stop processing. */
+
+		if (is_string($retval)) {
+			global $wgOut;
+			$wgOut->showFatalError($retval);
+			return false;
+		} else if (!$retval) {
+			return false;
+		}
+	}
+
+	return true;
+}
+?>