smarty/internals/core.load_plugins.php
author Dan
Sun, 23 Mar 2008 15:24:06 -0400
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parent 0 c63de9eb7045
permissions -rw-r--r--
Preliminary groundwork for AJAX interface
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<?php
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/**
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 * Smarty plugin
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 * @package Smarty
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 * @subpackage plugins
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 */
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/**
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 * Load requested plugins
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 *
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 * @param array $plugins
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 */
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// $plugins
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function smarty_core_load_plugins($params, &$smarty)
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{
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    foreach ($params['plugins'] as $_plugin_info) {
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        list($_type, $_name, $_tpl_file, $_tpl_line, $_delayed_loading) = $_plugin_info;
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        $_plugin = &$smarty->_plugins[$_type][$_name];
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        /*
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         * We do not load plugin more than once for each instance of Smarty.
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         * The following code checks for that. The plugin can also be
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         * registered dynamically at runtime, in which case template file
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         * and line number will be unknown, so we fill them in.
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         *
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         * The final element of the info array is a flag that indicates
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         * whether the dynamically registered plugin function has been
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         * checked for existence yet or not.
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         */
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        if (isset($_plugin)) {
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            if (empty($_plugin[3])) {
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                if (!is_callable($_plugin[0])) {
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                    $smarty->_trigger_fatal_error("[plugin] $_type '$_name' is not implemented", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
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                } else {
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                    $_plugin[1] = $_tpl_file;
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                    $_plugin[2] = $_tpl_line;
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                    $_plugin[3] = true;
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                    if (!isset($_plugin[4])) $_plugin[4] = true; /* cacheable */
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                }
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            }
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            continue;
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        } else if ($_type == 'insert') {
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            /*
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             * For backwards compatibility, we check for insert functions in
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             * the symbol table before trying to load them as a plugin.
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             */
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            $_plugin_func = 'insert_' . $_name;
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            if (function_exists($_plugin_func)) {
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                $_plugin = array($_plugin_func, $_tpl_file, $_tpl_line, true, false);
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                continue;
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            }
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        }
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        $_plugin_file = $smarty->_get_plugin_filepath($_type, $_name);
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        if (! $_found = ($_plugin_file != false)) {
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            $_message = "could not load plugin file '$_type.$_name.php'\n";
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        }
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        /*
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         * If plugin file is found, it -must- provide the properly named
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         * plugin function. In case it doesn't, simply output the error and
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         * do not fall back on any other method.
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         */
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        if ($_found) {
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            include_once $_plugin_file;
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            $_plugin_func = 'smarty_' . $_type . '_' . $_name;
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            if (!function_exists($_plugin_func)) {
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                $smarty->_trigger_fatal_error("[plugin] function $_plugin_func() not found in $_plugin_file", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
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                continue;
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            }
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        }
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        /*
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         * In case of insert plugins, their code may be loaded later via
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         * 'script' attribute.
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         */
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        else if ($_type == 'insert' && $_delayed_loading) {
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            $_plugin_func = 'smarty_' . $_type . '_' . $_name;
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            $_found = true;
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        }
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        /*
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         * Plugin specific processing and error checking.
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         */
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        if (!$_found) {
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            if ($_type == 'modifier') {
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                /*
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                 * In case modifier falls back on using PHP functions
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                 * directly, we only allow those specified in the security
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                 * context.
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                 */
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                if ($smarty->security && !in_array($_name, $smarty->security_settings['MODIFIER_FUNCS'])) {
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                    $_message = "(secure mode) modifier '$_name' is not allowed";
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                } else {
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                    if (!function_exists($_name)) {
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                        $_message = "modifier '$_name' is not implemented";
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                    } else {
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                        $_plugin_func = $_name;
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                        $_found = true;
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                    }
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                }
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            } else if ($_type == 'function') {
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                /*
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                 * This is a catch-all situation.
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                 */
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                $_message = "unknown tag - '$_name'";
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            }
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        }
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        if ($_found) {
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            $smarty->_plugins[$_type][$_name] = array($_plugin_func, $_tpl_file, $_tpl_line, true, true);
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        } else {
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            // output error
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            $smarty->_trigger_fatal_error('[plugin] ' . $_message, $_tpl_file, $_tpl_line, __FILE__, __LINE__);
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        }
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    }
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}
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/* vim: set expandtab: */
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?>