/**
* plugin.php
*
- * Copyright (c) 1999-2003 The SquirrelMail Project Team
- * Licensed under the GNU GPL. For full terms see the file COPYING.
- *
* This file provides the framework for a plugin architecture.
*
* Documentation on how to write plugins might show up some time.
*
- * $Id$
+ * @copyright © 1999-2006 The SquirrelMail Project Team
+ * @license http://opensource.org/licenses/gpl-license.php GNU Public License
+ * @version $Id$
+ * @package squirrelmail
*/
-global $squirrelmail_plugin_hooks;
-$squirrelmail_plugin_hooks = array();
-
-/* This function adds a plugin. */
+/**
+ * This function adds a plugin.
+ * @param string $name Internal plugin name (ie. delete_move_next)
+ * @return void
+ */
function use_plugin ($name) {
if (file_exists(SM_PATH . "plugins/$name/setup.php")) {
include_once(SM_PATH . "plugins/$name/setup.php");
}
}
-/* This function executes a hook. */
+/**
+ * This function executes a hook.
+ * @param string $name Name of hook to fire
+ * @return mixed $data
+ */
function do_hook ($name) {
- global $squirrelmail_plugin_hooks;
+ global $squirrelmail_plugin_hooks, $currentHookName;
$data = func_get_args();
- $ret = '';
+ $currentHookName = $name;
if (isset($squirrelmail_plugin_hooks[$name])
&& is_array($squirrelmail_plugin_hooks[$name])) {
}
}
+ $currentHookName = '';
+
/* Variable-length argument lists have a slight problem when */
/* passing values by reference. Pity. This is a workaround. */
return $data;
}
-/* This function executes a hook. */
+/**
+ * This function executes a hook and allows for parameters to be passed.
+ *
+ * @param string name the name of the hook
+ * @param mixed param the parameters to pass to the hook function
+ * @return mixed the return value of the hook function
+ */
function do_hook_function($name,$parm=NULL) {
- global $squirrelmail_plugin_hooks;
+ global $squirrelmail_plugin_hooks, $currentHookName;
$ret = '';
+ $currentHookName = $name;
if (isset($squirrelmail_plugin_hooks[$name])
&& is_array($squirrelmail_plugin_hooks[$name])) {
}
}
+ $currentHookName = '';
+
/* Variable-length argument lists have a slight problem when */
/* passing values by reference. Pity. This is a workaround. */
return $ret;
}
-/* This function executes a hook. */
+/**
+ * This function executes a hook, concatenating the results of each
+ * plugin that has the hook defined.
+ *
+ * @param string name the name of the hook
+ * @param mixed parm optional hook function parameters
+ * @return string a concatenation of the results of each plugin function
+ */
function concat_hook_function($name,$parm=NULL) {
- global $squirrelmail_plugin_hooks;
+ global $squirrelmail_plugin_hooks, $currentHookName;
$ret = '';
+ $currentHookName = $name;
if (isset($squirrelmail_plugin_hooks[$name])
&& is_array($squirrelmail_plugin_hooks[$name])) {
}
}
+ $currentHookName = '';
+
/* Variable-length argument lists have a slight problem when */
/* passing values by reference. Pity. This is a workaround. */
return $ret;
}
/**
- * This function checks whether the user's USER_AGENT is known to
- * be broken. If so, returns true and the plugin is invisible to the
- * offending browser.
+ * This function is used for hooks which are to return true or
+ * false. If $priority is > 0, any one or more trues will override
+ * any falses. If $priority < 0, then one or more falses will
+ * override any trues.
+ * Priority 0 means majority rules. Ties will be broken with $tie
+ *
+ * @param string name the hook name
+ * @param mixed parm the parameters for the hook function
+ * @param int priority
+ * @param bool tie
+ * @return bool the result of the function
*/
-function soupNazi(){
+function boolean_hook_function($name,$parm=NULL,$priority=0,$tie=false) {
+ global $squirrelmail_plugin_hooks, $currentHookName;
+ $yea = 0;
+ $nay = 0;
+ $ret = $tie;
+
+ if (isset($squirrelmail_plugin_hooks[$name]) &&
+ is_array($squirrelmail_plugin_hooks[$name])) {
- $soup_menu = array('Mozilla/3','Mozilla/2','Mozilla/1', 'Opera 4',
- 'Opera/4', 'OmniWeb', 'Lynx');
- sqgetGlobalVar('HTTP_USER_AGENT', $user_agent, SQ_SERVER);
- foreach($soup_menu as $browser) {
- if(stristr($user_agent, $browser)) {
- return 1;
+ /* Loop over the plugins that registered the hook */
+ $currentHookName = $name;
+ foreach ($squirrelmail_plugin_hooks[$name] as $function) {
+ if (function_exists($function)) {
+ $ret = $function($parm);
+ if ($ret) {
+ $yea++;
+ } else {
+ $nay++;
+ }
+ }
+ }
+ $currentHookName = '';
+
+ /* Examine the aftermath and assign the return value appropriately */
+ if (($priority > 0) && ($yea)) {
+ $ret = true;
+ } elseif (($priority < 0) && ($nay)) {
+ $ret = false;
+ } elseif ($yea > $nay) {
+ $ret = true;
+ } elseif ($nay > $yea) {
+ $ret = false;
+ } else {
+ // There's a tie, no action needed.
}
+ return $ret;
}
- return 0;
+ // If the code gets here, there was a problem - no hooks, etc.
+ return NULL;
}
-/*************************************/
-/*** MAIN PLUGIN LOADING CODE HERE ***/
-/*************************************/
-
-/* On startup, register all plugins configured for use. */
-if (isset($plugins) && is_array($plugins)) {
- foreach ($plugins as $name) {
- use_plugin($name);
- }
+
+/**
+ * This function checks whether the user's USER_AGENT is known to
+ * be broken. If so, returns true and the plugin is invisible to the
+ * offending browser.
+ * *** THIS IS A TEST FOR JAVASCRIPT SUPPORT ***
+ * FIXME: This function needs to have its name changed!
+ *
+ * @return bool whether this browser properly supports JavaScript
+ * @deprecated use checkForJavascript() since 1.5.1
+ */
+function soupNazi(){
+ return !checkForJavascript();
}
-?>
+/**
+ * Check if plugin is enabled
+ * @param string $plugin_name plugin name
+ * @since 1.5.1
+ * @return boolean
+ */
+function is_plugin_enabled($plugin_name) {
+ global $plugins;
+
+ /**
+ * check if variable is empty. if var is not set, php empty
+ * returns true without error notice.
+ *
+ * then check if it is an array
+ */
+ if (empty($plugins) || ! is_array($plugins))
+ return false;
+
+ if ( in_array($plugin_name,$plugins) ) {
+ return true;
+ } else {
+ return false;
+ }
+}