Merge branch 'psr2'

* psr2: (160 commits)
  fixed merge error
  Moved parts of the Asian word handling to its own class
  ignore snake_case error of substr_replace
  fixed some line length errors
  ignore PSR2 in the old form class
  fix PSR2 error in switch statement
  replaced deprecated utf8 functions
  formatting cleanup
  mark old utf8 functions deprecated
  some more PSR2 cleanup
  Some cleanup for the UTF-8 stuff
  Moved all utf8 methods to their own namespaced classes
  Create separate table files for UTF-8 handling
  Ignore mixed concerns in loader
  Use type safe comparisons in loader
  Remove obsolete include
  adjust phpcs exclude patterns for new plugin classes
  🚚 Move Subscription class to deprecated.php
  ♻️  Split up ChangesSubscriptionSender into multiple classes
  Minor optimizations in PluginController
  ...

1 files changed, 94 insertions, 0 deletions

diff --git a/inc/Cache/CacheRenderer.php b/inc/Cache/CacheRenderer.php
new file mode 100644
index 000000000..e8a28c309
--- /dev/null
+++ b/inc/Cache/CacheRenderer.php
@@ -0,0 +1,94 @@
+<?php
+
+namespace dokuwiki\Cache;
+
+/**
+ * Caching of data of renderer
+ */
+class CacheRenderer extends CacheParser
+{
+
+    /**
+     * method contains cache use decision logic
+     *
+     * @return bool               see useCache()
+     */
+    public function makeDefaultCacheDecision()
+    {
+        global $conf;
+
+        if (!parent::makeDefaultCacheDecision()) {
+            return false;
+        }
+
+        if (!isset($this->page)) {
+            return true;
+        }
+
+        // meta cache older than file it depends on?
+        if ($this->_time < @filemtime(metaFN($this->page, '.meta'))) {
+            return false;
+        }
+
+        // check current link existence is consistent with cache version
+        // first check the purgefile
+        // - if the cache is more recent than the purgefile we know no links can have been updated
+        if ($this->_time >= @filemtime($conf['cachedir'] . '/purgefile')) {
+            return true;
+        }
+
+        // for wiki pages, check metadata dependencies
+        $metadata = p_get_metadata($this->page);
+
+        if (!isset($metadata['relation']['references']) ||
+            empty($metadata['relation']['references'])) {
+            return true;
+        }
+
+        foreach ($metadata['relation']['references'] as $id => $exists) {
+            if ($exists != page_exists($id, '', false)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    protected function addDependencies()
+    {
+        global $conf;
+
+        // default renderer cache file 'age' is dependent on 'cachetime' setting, two special values:
+        //    -1 : do not cache (should not be overridden)
+        //    0  : cache never expires (can be overridden) - no need to set depends['age']
+        if ($conf['cachetime'] == -1) {
+            $this->_nocache = true;
+            return;
+        } elseif ($conf['cachetime'] > 0) {
+            $this->depends['age'] = isset($this->depends['age']) ?
+                min($this->depends['age'], $conf['cachetime']) : $conf['cachetime'];
+        }
+
+        // renderer cache file dependencies ...
+        $files = array(
+            DOKU_INC . 'inc/parser/' . $this->mode . '.php',       // ... the renderer
+        );
+
+        // page implies metadata and possibly some other dependencies
+        if (isset($this->page)) {
+
+            // for xhtml this will render the metadata if needed
+            $valid = p_get_metadata($this->page, 'date valid');
+            if (!empty($valid['age'])) {
+                $this->depends['age'] = isset($this->depends['age']) ?
+                    min($this->depends['age'], $valid['age']) : $valid['age'];
+            }
+        }
+
+        $this->depends['files'] = !empty($this->depends['files']) ?
+            array_merge($files, $this->depends['files']) :
+            $files;
+
+        parent::addDependencies();
+    }
+}