+ // If the code gets here, there was a problem - no hooks, etc.
+ return NULL;
+
+}
+
+/**
+ * Do not use, use checkForJavascript() instead.
+ *
+ * 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 ***
+ *
+ * @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;
+ }
+}
+
+/**
+ * Check a plugin's version.
+ *
+ * Returns TRUE if the given plugin is installed,
+ * activated and is at minimum version $a.$b.$c.
+ * If any one of those conditions fails, FALSE
+ * will be returned (careful of plugins that are
+ * sufficiently versioned but are not activated).
+ *
+ * By overriding the default value of $force_inclusion,
+ * this function will attempt to grab versioning
+ * information from the given plugin even if it
+ * is not activated (plugin still has to be
+ * unpackaged and set in place in the plugins
+ * directory). Use with care - some plugins
+ * might break SquirrelMail when this is used.
+ *
+ * Note that this function assumes plugin
+ * versioning is consistently applied in the same
+ * fashion that SquirrelMail versions are, with the
+ * exception that an applicable SquirrelMail
+ * version may be appended to the version number
+ * (which will be ignored herein). That is, plugin
+ * version number schemes are expected in the following
+ * format: 1.2.3, or 1.2.3-1.4.0.
+ *
+ * Any characters after the third number are discarded,
+ * so formats such as the following will also work,
+ * although extra information about beta versions can
+ * possibly confuse the desired results of the version
+ * check: 1.2.3-beta4, 1.2.3.RC2, and so forth.
+ *
+ * @since 1.5.2
+ *
+ * @param string plugin_name name of the plugin to
+ * check; must precisely
+ * match the plugin
+ * directory name
+ * @param int a major version number
+ * @param int b minor version number
+ * @param int c release number
+ * @param bool force_inclusion try to get version info
+ * for plugins not activated?
+ * (default FALSE)
+ *
+ * @return bool
+ *
+ */
+function check_plugin_version($plugin_name,
+ $a = 0, $b = 0, $c = 0,
+ $force_inclusion = FALSE)
+{
+
+ $info_function = $plugin_name . '_info';
+ $version_function = $plugin_name . '_version';
+ $plugin_info = array();
+ $plugin_version = FALSE;
+
+
+ // first attempt to find the plugin info function, wherein
+ // the plugin version should be available
+ //
+ if (function_exists($info_function))
+ $plugin_info = $info_function();
+ else if ($force_inclusion
+ && file_exists(SM_PATH . 'plugins/' . $plugin_name . '/setup.php'))
+ {
+ include_once(SM_PATH . 'plugins/' . $plugin_name . '/setup.php');
+ if (function_exists($info_function))
+ $plugin_info = $info_function();
+ }
+ if (!empty($plugin_info['version']))
+ $plugin_version = $plugin_info['version'];
+
+
+ // otherwise, look for older version function
+ //
+ if (!$plugin_version && function_exists($version_function))
+ $plugin_version = $version_function();
+
+
+ if (!$plugin_version) return FALSE;
+
+
+ // now massage version number into something we understand
+ //
+ $plugin_version = trim(preg_replace(array('/[^0-9.]+.*$/', '/[^0-9.]/'),
+ '', $plugin_version),
+ '.');
+ $plugin_version = explode('.', $plugin_version);
+ if (!isset($plugin_version[0])) $plugin_version[0] = 0;
+ if (!isset($plugin_version[1])) $plugin_version[1] = 0;
+ if (!isset($plugin_version[2])) $plugin_version[2] = 0;
+// sm_print_r($plugin_version);
+
+
+ // now test the version number
+ //
+ if ($plugin_version[0] < $a ||
+ ($plugin_version[0] == $a && $plugin_version[1] < $b) ||
+ ($plugin_version[0] == $a && $plugin_version[1] == $b && $plugin_version[2] < $c))
+ return FALSE;
+
+
+ return TRUE;
+
+}