From 9a0f688b376bd8c95356f4226a960a0fbc466422 Mon Sep 17 00:00:00 2001
From: Silvio Rhatto <rhatto@riseup.net>
Date: Wed, 12 Aug 2015 10:49:40 -0300
Subject: Initial code for showing cached bookmarks

---
 data/config.default.php                  | 23 +++++++++++++++++++++++
 data/templates/default/bookmarks.tpl.php | 15 +++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/data/config.default.php b/data/config.default.php
index 5e560a7..dd220ac 100644
--- a/data/config.default.php
+++ b/data/config.default.php
@@ -778,4 +778,27 @@ $unittestUrl = null;
  */
 $allowUnittestMode = false;
 
+/***************************************************
+ * Caching support
+ *
+ * Use the following configuration if you want to provide a link
+ * to a cached copy of your bookmarks.
+ *
+ * Please note that these feature just provide the link if a cached
+ * copy exists.
+ *
+ * You should download SemanticScuttle bookmarks using a tool like
+ * https://git.sarava.org/?p=httruta.git
+ */
+
+/**
+ * Set to the filesystem folder where your bookmark cache resides.
+ */
+$cacheFolder = null;
+
+/**
+ * Set to the base public URL of you cache folder.
+ */
+$cacheUrl = null;
+
 ?>
diff --git a/data/templates/default/bookmarks.tpl.php b/data/templates/default/bookmarks.tpl.php
index 2a3d169..35bbcdb 100644
--- a/data/templates/default/bookmarks.tpl.php
+++ b/data/templates/default/bookmarks.tpl.php
@@ -337,6 +337,20 @@ if ($currenttag!= '') {
 			}
 		}
 
+    // Local cache
+    $cacheLink = null;
+    if ($GLOBALS['cacheFolder'] != null && $GLOBALS['cacheUrl'] != null) {
+      // Hashing discussion at http://linuxprocess.free.fr/MHonArc/Oct-2005/msg00016.html
+      $assetHash = sha1($row['bAddress'] . "\n");
+      $assetHash = substr($assetHash, 0, 2) . '/' . substr($assetHash, 2, 2) . '/' . $assetHash;
+      $assetFile = $GLOBALS['cacheFolder'] . '/' . $assetHash;
+
+      if (file_exists($assetFile)) {
+        $assetLink = $GLOBALS['cacheUrl'] . '/' . $assetHash;
+        $cacheLink = "| <a href=\"$assetLink\">Cache</a>";
+      }
+    }
+
 		// Copy link
 		if ($userservice->isLoggedOn()
             && ($currentUser->getId() != $row['uId'])
@@ -425,6 +439,7 @@ if ($currenttag!= '') {
             . $copy . "\n"
             . $edit . "\n"
             . $update . "\n"
+            . $cacheLink ."\n"
             . "  </div>\n";
 		echo $privateNoteField != ''
             ? '    <div class="privateNote" title="'. T_('Private Note on this bookmark') .'">'.$privateNoteField."</div>\n"
-- 
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