X-Git-Url: https://vcs.fsf.org/?a=blobdiff_plain;f=functions%2Fplugin.php;h=3004f8699e0d75659ea8d5b783ba84757839e3bd;hb=eac264935e8da241a837ac60bd3d3a94a071c0c6;hp=c1c4cf2aa7f739966f69cd7cae19b70fc02d8a09;hpb=7b086a8035ee92e3afe42857f6877522c13f2c76;p=squirrelmail.git

diff --git a/functions/plugin.php b/functions/plugin.php
index c1c4cf2a..3004f869 100644
--- a/functions/plugin.php
+++ b/functions/plugin.php
@@ -1,46 +1,199 @@
 <?php
 
 /**
- ** plugin.php
- **
- ** This file provides the framework for a plugin architecture.
- **
- ** Plugins will eventually be a way to provide added functionality
- ** without having to patch the SquirrelMail source code. Have some
- ** patients, though, as the these funtions might change in the near
- ** future.
- **
- ** Documentation on how to write plugins might show up some time.
- **
- **/
-
-
-   $plugin_php = true;
-
-   // This function adds a plugin
-   function use_plugin ($name) {
-      include ('../plugins/'.$name.'/setup.php');
-      $function = 'squirrelmail_plugin_init_'.$name;
-      $function();
-   }
-
-   // This function executes a hook
-   function do_hook ($name) {
-      global $squirrelmail_plugin_hooks;
-      if (is_array($squirrelmail_plugin_hooks[$name])) {
-         reset($squirrelmail_plugin_hooks[$name]);
-         
-         while (list ($id, $function) = 
-                each ($squirrelmail_plugin_hooks[$name])) {
-            // Add something to set correct gettext domain for plugin
+ * 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.
+ *
+ * $Id$
+ * @package squirrelmail
+ */
+
+/** Everything needs global.. */
+require_once(SM_PATH . 'functions/global.php');
+
+global $squirrelmail_plugin_hooks;
+$squirrelmail_plugin_hooks = array();
+
+/**
+ * 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");
+        $function = "squirrelmail_plugin_init_$name";
+        if (function_exists($function)) {
             $function();
-         }
-      }
-   }
+        }
+    }
+}
+
+/**
+ * This function executes a hook.
+ * @param string $name Name of hook to fire
+ * @return mixed $data
+ */
+function do_hook ($name) {
+    global $squirrelmail_plugin_hooks;
+    $data = func_get_args();
+    $ret = '';
+
+    if (isset($squirrelmail_plugin_hooks[$name])
+          && is_array($squirrelmail_plugin_hooks[$name])) {
+        foreach ($squirrelmail_plugin_hooks[$name] as $function) {
+            /* Add something to set correct gettext domain for plugin. */
+            if (function_exists($function)) {
+                $function($data);
+            }
+        }
+    }
+
+    /* Variable-length argument lists have a slight problem when */
+    /* passing values by reference. Pity. This is a workaround.  */
+    return $data;
+}
+
+/**
+ * This function executes a hook and allows for parameters to be passed.
+ *
+ * @param string name the name of the hook
+ * @param mixed param the parameters to pass to the hook function
+ * @return mixed the return value of the hook function
+ */
+function do_hook_function($name,$parm=NULL) {
+    global $squirrelmail_plugin_hooks;
+    $ret = '';
+
+    if (isset($squirrelmail_plugin_hooks[$name])
+          && is_array($squirrelmail_plugin_hooks[$name])) {
+        foreach ($squirrelmail_plugin_hooks[$name] as $function) {
+            /* Add something to set correct gettext domain for plugin. */
+            if (function_exists($function)) {
+                $ret = $function($parm);
+            }
+        }
+    }
+
+    /* Variable-length argument lists have a slight problem when */
+    /* passing values by reference. Pity. This is a workaround.  */
+    return $ret;
+}
+
+/**
+ * This function executes a hook, concatenating the results of each
+ * plugin that has the hook defined.
+ *
+ * @param string name the name of the hook
+ * @param mixed parm optional hook function parameters
+ * @return string a concatenation of the results of each plugin function
+ */
+function concat_hook_function($name,$parm=NULL) {
+    global $squirrelmail_plugin_hooks;
+    $ret = '';
+
+    if (isset($squirrelmail_plugin_hooks[$name])
+          && is_array($squirrelmail_plugin_hooks[$name])) {
+        foreach ($squirrelmail_plugin_hooks[$name] as $function) {
+            /* Concatenate results from hook. */
+            if (function_exists($function)) {
+                $ret .= $function($parm);
+            }
+        }
+    }
+
+    /* Variable-length argument lists have a slight problem when */
+    /* passing values by reference. Pity. This is a workaround.  */
+    return $ret;
+}
+
+/**
+ * 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 $tie
+ *
+ * @param string name the hook name
+ * @param mixed parm the parameters for the hook function
+ * @param int priority
+ * @param bool tie
+ * @return bool the result of the function
+ */
+function boolean_hook_function($name,$parm=NULL,$priority=0,$tie=false) {
+    global $squirrelmail_plugin_hooks;
+    $yea = 0;
+    $nay = 0;
+    $ret = $tie;
+
+    if (isset($squirrelmail_plugin_hooks[$name]) &&
+        is_array($squirrelmail_plugin_hooks[$name])) {
+
+        /* Loop over the plugins that registered the hook */
+        foreach ($squirrelmail_plugin_hooks[$name] as $function) {
+            if (function_exists($function)) {
+                $ret = $function($parm);
+                if ($ret) {
+                    $yea++;
+                } else {
+                    $nay++;
+                }
+            }
+        }
+
+        /* Examine the aftermath and assign the return value appropriately */
+        if (($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;
+    }
+    // If the code gets here, there was a problem - no hooks, etc.
+    return NULL;
+}
+
+/**
+ * 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 needs to have its name changed!
+ *
+ * @return bool whether this browser properly supports JavaScript
+ */
+function soupNazi(){
+
+    $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;
+        }
+    }
+    return 0;
+}
+/*************************************/
+/*** MAIN PLUGIN LOADING CODE HERE ***/
+/*************************************/
 
-   // On startup, register all plugins configured for use
-  if (is_array($plugins))
-     while (list ($id, $name) = each ($plugins))
+/* On startup, register all plugins configured for use. */
+if (isset($plugins) && is_array($plugins)) {
+    foreach ($plugins as $name) {
         use_plugin($name);
+    }
+}
 
 ?>