Migrate cache purge function to a proper class

And update dependencies and tests.

Note that SESSION['tags'] has been removed a log ago

5 files changed, 54 insertions, 42 deletions

diff --git a/application/bookmark/BookmarkFileService.php b/application/bookmark/BookmarkFileService.php
index 9c59e139..fef998fd 100644
--- a/application/bookmark/BookmarkFileService.php
+++ b/application/bookmark/BookmarkFileService.php
@@ -12,6 +12,7 @@ use Shaarli\Formatter\BookmarkMarkdownFormatter;
 use Shaarli\History;
 use Shaarli\Legacy\LegacyLinkDB;
 use Shaarli\Legacy\LegacyUpdater;
+use Shaarli\Render\PageCacheManager;
 use Shaarli\Updater\UpdaterUtils;
 
 /**
@@ -39,6 +40,9 @@ class BookmarkFileService implements BookmarkServiceInterface
     /** @var History instance */
     protected $history;
 
+    /** @var PageCacheManager instance */
+    protected $pageCacheManager;
+
     /** @var bool true for logged in users. Default value to retrieve private bookmarks. */
     protected $isLoggedIn;
 
@@ -49,6 +53,7 @@ class BookmarkFileService implements BookmarkServiceInterface
     {
         $this->conf = $conf;
         $this->history = $history;
+        $this->pageCacheManager = new PageCacheManager($this->conf->get('resource.page_cache'));
         $this->bookmarksIO = new BookmarkIO($this->conf);
         $this->isLoggedIn = $isLoggedIn;
 
@@ -275,7 +280,7 @@ class BookmarkFileService implements BookmarkServiceInterface
         }
         $this->bookmarks->reorder();
         $this->bookmarksIO->write($this->bookmarks);
-        invalidateCaches($this->conf->get('resource.page_cache'));
+        $this->pageCacheManager->invalidateCaches();
     }
 
     /**
diff --git a/application/bookmark/BookmarkIO.php b/application/bookmark/BookmarkIO.php
index ae9ffcb4..1026e2f9 100644
--- a/application/bookmark/BookmarkIO.php
+++ b/application/bookmark/BookmarkIO.php
@@ -102,7 +102,5 @@ class BookmarkIO
             $this->datastore,
             self::$phpPrefix.base64_encode(gzdeflate(serialize($links))).self::$phpSuffix
         );
-
-        invalidateCaches($this->conf->get('resource.page_cache'));
     }
 }
diff --git a/application/feed/Cache.php b/application/feed/Cache.php
deleted file mode 100644
index e5d43e61..00000000
--- a/application/feed/Cache.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-/**
- * Cache utilities
- */
-
-/**
- * Purges all cached pages
- *
- * @param string $pageCacheDir page cache directory
- *
- * @return mixed an error string if the directory is missing
- */
-function purgeCachedPages($pageCacheDir)
-{
-    if (! is_dir($pageCacheDir)) {
-        $error = sprintf(t('Cannot purge %s: no directory'), $pageCacheDir);
-        error_log($error);
-        return $error;
-    }
-
-    array_map('unlink', glob($pageCacheDir.'/*.cache'));
-}
-
-/**
- * Invalidates caches when the database is changed or the user logs out.
- *
- * @param string $pageCacheDir page cache directory
- */
-function invalidateCaches($pageCacheDir)
-{
-    // Purge cache attached to session.
-    if (isset($_SESSION['tags'])) {
-        unset($_SESSION['tags']);
-    }
-
-    // Purge page cache shared by sessions.
-    purgeCachedPages($pageCacheDir);
-}
diff --git a/application/legacy/LegacyLinkDB.php b/application/legacy/LegacyLinkDB.php
index 7ccf5e54..947005ad 100644
--- a/application/legacy/LegacyLinkDB.php
+++ b/application/legacy/LegacyLinkDB.php
@@ -9,6 +9,7 @@ use Iterator;
 use Shaarli\Bookmark\Exception\BookmarkNotFoundException;
 use Shaarli\Exceptions\IOException;
 use Shaarli\FileUtils;
+use Shaarli\Render\PageCacheManager;
 
 /**
  * Data storage for bookmarks.
@@ -352,7 +353,8 @@ You use the community supported version of the original Shaarli project, by Seba
 
         $this->write();
 
-        invalidateCaches($pageCacheDir);
+        $pageCacheManager = new PageCacheManager($pageCacheDir);
+        $pageCacheManager->invalidateCaches();
     }
 
     /**
diff --git a/application/render/PageCacheManager.php b/application/render/PageCacheManager.php
new file mode 100644
index 00000000..bd91fe0d
--- /dev/null
+++ b/application/render/PageCacheManager.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace Shaarli\Render;
+
+/**
+ * Cache utilities
+ */
+class PageCacheManager
+{
+    /** @var string Cache directory */
+    protected $pageCacheDir;
+
+    public function __construct(string $pageCacheDir)
+    {
+        $this->pageCacheDir = $pageCacheDir;
+    }
+
+    /**
+     * Purges all cached pages
+     *
+     * @return string|null an error string if the directory is missing
+     */
+    public function purgeCachedPages(): ?string
+    {
+        if (!is_dir($this->pageCacheDir)) {
+            $error = sprintf(t('Cannot purge %s: no directory'), $this->pageCacheDir);
+            error_log($error);
+
+            return $error;
+        }
+
+        array_map('unlink', glob($this->pageCacheDir . '/*.cache'));
+
+        return null;
+    }
+
+    /**
+     * Invalidates caches when the database is changed or the user logs out.
+     */
+    public function invalidateCaches(): void
+    {
+        // Purge page cache shared by sessions.
+        $this->purgeCachedPages();
+    }
+}