From fa10e0945ecd45bfe78a2c8fb015a43092b4944b Mon Sep 17 00:00:00 2001
From: plegall <plg@piwigo.org>
Date: Thu, 10 Dec 2015 14:02:22 +0100
Subject: bug #385 update to smarty-3.1.28-dev (from Github)

---
 .../libs/sysplugins/smarty_template_cached.php     | 246 +++++++++++++++++++++
 1 file changed, 246 insertions(+)
 create mode 100644 include/smarty/libs/sysplugins/smarty_template_cached.php

(limited to 'include/smarty/libs/sysplugins/smarty_template_cached.php')

diff --git a/include/smarty/libs/sysplugins/smarty_template_cached.php b/include/smarty/libs/sysplugins/smarty_template_cached.php
new file mode 100644
index 000000000..cecf42986
--- /dev/null
+++ b/include/smarty/libs/sysplugins/smarty_template_cached.php
@@ -0,0 +1,246 @@
+<?php
+/**
+ * Created by PhpStorm.
+ * User: Uwe Tews
+ * Date: 04.12.2014
+ * Time: 06:08
+ */
+
+/**
+ * Smarty Resource Data Object
+ * Cache Data Container for Template Files
+ *
+ * @package    Smarty
+ * @subpackage TemplateResources
+ * @author     Rodney Rehm
+ */
+class Smarty_Template_Cached extends Smarty_Template_Resource_Base
+{
+    /**
+     * Cache Is Valid
+     *
+     * @var boolean
+     */
+    public $valid = null;
+
+    /**
+     * CacheResource Handler
+     *
+     * @var Smarty_CacheResource
+     */
+    public $handler = null;
+
+    /**
+     * Template Cache Id (Smarty_Internal_Template::$cache_id)
+     *
+     * @var string
+     */
+    public $cache_id = null;
+
+    /**
+     * saved cache lifetime in seconds
+     *
+     * @var integer
+     */
+    public $cache_lifetime = 0;
+
+    /**
+     * Id for cache locking
+     *
+     * @var string
+     */
+    public $lock_id = null;
+
+    /**
+     * flag that cache is locked by this instance
+     *
+     * @var bool
+     */
+    public $is_locked = false;
+
+    /**
+     * Source Object
+     *
+     * @var Smarty_Template_Source
+     */
+    public $source = null;
+
+    /**
+     * Nocache hash codes of processed compiled templates
+     *
+     * @var array
+     */
+    public $hashes = array();
+
+    /**
+     * create Cached Object container
+     *
+     * @param Smarty_Internal_Template $_template template object
+     */
+    public function __construct(Smarty_Internal_Template $_template)
+    {
+        $this->compile_id = $_template->compile_id;
+        $this->cache_id = $_template->cache_id;
+        $this->source = $_template->source;
+        if (!class_exists('Smarty_CacheResource', false)) {
+            require SMARTY_SYSPLUGINS_DIR . 'smarty_cacheresource.php';
+        }
+        $this->handler = Smarty_CacheResource::load($_template->smarty);
+    }
+
+    /**
+     * @param Smarty_Internal_Template $_template
+     *
+     * @return Smarty_Template_Cached
+     */
+    static function load(Smarty_Internal_Template $_template)
+    {
+        $_template->cached = new Smarty_Template_Cached($_template);
+        $_template->cached->handler->populate($_template->cached, $_template);
+        // caching enabled ?
+        if (!($_template->caching == Smarty::CACHING_LIFETIME_CURRENT ||
+                $_template->caching == Smarty::CACHING_LIFETIME_SAVED) || $_template->source->handler->recompiled
+        ) {
+            $_template->cached->valid = false;
+        }
+        return $_template->cached;
+    }
+
+    /**
+     * Render cache template
+     *
+     * @param \Smarty_Internal_Template $_template
+     * @param  bool                     $no_output_filter
+     *
+     * @throws \Exception
+     */
+    public function render(Smarty_Internal_Template $_template, $no_output_filter = true)
+    {
+        if ($this->isCached($_template)) {
+            if ($_template->smarty->debugging) {
+                $_template->smarty->_debug->start_cache($_template);
+            }
+            if (!$this->processed) {
+                $this->process($_template);
+            }
+            $this->getRenderedTemplateCode($_template);
+            if ($_template->smarty->debugging) {
+                $_template->smarty->_debug->end_cache($_template);
+            }
+            return;
+        } else {
+            $_template->smarty->ext->_updateCache->updateCache($this, $_template, $no_output_filter);
+        }
+    }
+
+    /**
+     * Check if cache is valid, lock cache if required
+     *
+     * @param \Smarty_Internal_Template $_template
+     *
+     * @return bool flag true if cache is valid
+     */
+    public function isCached(Smarty_Internal_Template $_template)
+    {
+        if ($this->valid !== null) {
+            return $this->valid;
+        }
+        while (true) {
+            while (true) {
+                if ($this->exists === false || $_template->smarty->force_compile || $_template->smarty->force_cache) {
+                    $this->valid = false;
+                } else {
+                    $this->valid = true;
+                }
+                if ($this->valid && $_template->caching == Smarty::CACHING_LIFETIME_CURRENT &&
+                    $_template->cache_lifetime >= 0 && time() > ($this->timestamp + $_template->cache_lifetime)
+                ) {
+                    // lifetime expired
+                    $this->valid = false;
+                }
+                if ($this->valid && $_template->smarty->compile_check == 1 &&
+                    $_template->source->getTimeStamp() > $this->timestamp
+                ) {
+                    $this->valid = false;
+                }
+                if ($this->valid || !$_template->smarty->cache_locking) {
+                    break;
+                }
+                if (!$this->handler->locked($_template->smarty, $this)) {
+                    $this->handler->acquireLock($_template->smarty, $this);
+                    break 2;
+                }
+                $this->handler->populate($this, $_template);
+            }
+            if ($this->valid) {
+                if (!$_template->smarty->cache_locking || $this->handler->locked($_template->smarty, $this) === null) {
+                    // load cache file for the following checks
+                    if ($_template->smarty->debugging) {
+                        $_template->smarty->_debug->start_cache($_template);
+                    }
+                    if ($this->handler->process($_template, $this) === false) {
+                        $this->valid = false;
+                    } else {
+                        $this->processed = true;
+                    }
+                    if ($_template->smarty->debugging) {
+                        $_template->smarty->_debug->end_cache($_template);
+                    }
+                } else {
+                    $this->is_locked = true;
+                    continue;
+                }
+            } else {
+                return $this->valid;
+            }
+            if ($this->valid && $_template->caching === Smarty::CACHING_LIFETIME_SAVED &&
+                $_template->cached->cache_lifetime >= 0 &&
+                (time() > ($_template->cached->timestamp + $_template->cached->cache_lifetime))
+            ) {
+                $this->valid = false;
+            }
+            if ($_template->smarty->cache_locking) {
+                if (!$this->valid) {
+                    $this->handler->acquireLock($_template->smarty, $this);
+                } elseif ($this->is_locked) {
+                    $this->handler->releaseLock($_template->smarty, $this);
+                }
+            }
+            return $this->valid;
+        }
+        return $this->valid;
+    }
+
+    /**
+     * Process cached template
+     *
+     * @param Smarty_Internal_Template $_template template object
+     * @param bool                     $update    flag if called because cache update
+     */
+    public function process(Smarty_Internal_Template $_template, $update = false)
+    {
+        if ($this->handler->process($_template, $this, $update) === false) {
+            $this->valid = false;
+        }
+        if ($this->valid) {
+            $this->processed = true;
+        } else {
+            $this->processed = false;
+        }
+    }
+
+    /**
+     * Read cache content from handler
+     *
+     * @param Smarty_Internal_Template $_template template object
+     *
+     * @return string content
+     */
+    public function read(Smarty_Internal_Template $_template)
+    {
+        if (!$_template->source->handler->recompiled) {
+            return $this->handler->readCachedContent($_template);
+        }
+        return false;
+    }
+}
-- 
cgit v1.2.3