library/smarty/libs/sysplugins/smarty_resource_custom.php
author Markus Bröker<broeker.markus@googlemail.com>
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<?php
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/**
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 * Smarty Resource Plugin
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 *
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 * @package    Smarty
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 * @subpackage TemplateResources
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 * @author     Rodney Rehm
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 */
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/**
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 * Smarty Resource Plugin
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 * Wrapper Implementation for custom resource plugins
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 *
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 * @package    Smarty
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 * @subpackage TemplateResources
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 */
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abstract class Smarty_Resource_Custom extends Smarty_Resource {
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    /**
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     * fetch template and its modification time from data source
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     *
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     * @param string $name template name
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     * @param string &$source template source
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     * @param integer &$mtime template modification timestamp (epoch)
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     */
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    abstract protected function fetch($name, &$source, &$mtime);
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    /**
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     * Fetch template's modification timestamp from data source
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     * {@internal implementing this method is optional.
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     *  Only implement it if modification times can be accessed faster than loading the complete template source.}}
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     *
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     * @param  string $name template name
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     *
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     * @return integer|boolean timestamp (epoch) the template was modified, or false if not found
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     */
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    protected function fetchTimestamp($name) {
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        return null;
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    }
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    /**
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     * populate Source Object with meta data from Resource
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     *
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     * @param Smarty_Template_Source $source source object
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     * @param Smarty_Internal_Template $_template template object
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     */
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    public function populate(Smarty_Template_Source $source, Smarty_Internal_Template $_template = null) {
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        $source->filepath = $source->type . ':' . $source->name;
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        $source->uid = sha1($source->type . ':' . $source->name);
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        $mtime = $this->fetchTimestamp($source->name);
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        if ($mtime !== null) {
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            $source->timestamp = $mtime;
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        } else {
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            $this->fetch($source->name, $content, $timestamp);
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            $source->timestamp = isset($timestamp) ? $timestamp : false;
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            if (isset($content)) {
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                $source->content = $content;
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            }
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        }
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        $source->exists = !!$source->timestamp;
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    }
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    /**
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     * Load template's source into current template object
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     *
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     * @param  Smarty_Template_Source $source source object
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     *
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     * @return string                 template source
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     * @throws SmartyException        if source cannot be loaded
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     */
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    public function getContent(Smarty_Template_Source $source) {
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        $this->fetch($source->name, $content, $timestamp);
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        if (isset($content)) {
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            return $content;
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        }
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        throw new SmartyException("Unable to read template {$source->type} '{$source->name}'");
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    }
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    /**
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     * Determine basename for compiled filename
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     *
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     * @param  Smarty_Template_Source $source source object
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     *
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     * @return string                 resource's basename
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     */
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    public function getBasename(Smarty_Template_Source $source) {
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        return basename($source->name);
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    }
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}