From ca78ebce6d254f244b4c1fbe25eb3aca40b26952 Mon Sep 17 00:00:00 2001
From: Andrew Manning <tamanning@zoho.com>
Date: Fri, 27 May 2016 20:37:37 -0400
Subject: Check if wiki exists and redirect if it does not

---
 Zotlabs/Module/Wiki.php |  7 ++++++-
 include/wiki.php        | 13 +++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/Zotlabs/Module/Wiki.php b/Zotlabs/Module/Wiki.php
index 221068e0a..290c2e005 100644
--- a/Zotlabs/Module/Wiki.php
+++ b/Zotlabs/Module/Wiki.php
@@ -26,6 +26,7 @@ class Wiki extends \Zotlabs\Web\Controller {
 	}
 
 	function get() {
+		require_once('include/wiki.php');
 		require_once('include/acl_selectors.php');
 		if(local_channel()) {
 			$channel = \App::get_channel();
@@ -56,6 +57,10 @@ class Wiki extends \Zotlabs\Web\Controller {
 		} elseif (argc()<4) {
 			$wikiheader = 'Empty wiki: ' . rawurldecode(argv(2)); // show wiki name
 			$hide_editor = true;
+			// Check if wiki exists andr redirect if it does not
+			if(!wiki_exists_by_name(argv(2))['id']) {
+				goaway('/'.argv(0).'/'.argv(1));
+			}
 		} elseif (argc()<5) {
 			$wikiheader = rawurldecode(argv(2)) . ': ' . rawurldecode(argv(3));	// show wiki name and page
 			$hide_editor = false;
@@ -112,7 +117,7 @@ class Wiki extends \Zotlabs\Web\Controller {
 				// then, use webpage permissions
 				if (!$perms['write_pages']) {
 					notice(t('Permission denied.') . EOL);
-					goaway(argv(0).'/'.argv(1).'/'.argv(2));
+					goaway('/'.argv(0).'/'.argv(1).'/'.argv(2));
 				}
 			}
 			$name = escape_tags(urlencode($_POST['wikiName'])); //Get new wiki name
diff --git a/include/wiki.php b/include/wiki.php
index 828121ba9..90b30d492 100644
--- a/include/wiki.php
+++ b/include/wiki.php
@@ -124,3 +124,16 @@ function wiki_delete_wiki($resource_id) {
         return array('item' => $item, 'success' => (($drop === 1 && $pathdel) ? true : false));   
     }
 }
+
+function wiki_exists_by_name($name) {
+		$item = q("SELECT id FROM item WHERE resource_type = '%s' AND title = '%s' AND item_deleted = 0 limit 1",
+            dbesc(WIKI_ITEM_RESOURCE_TYPE),
+            dbesc($name)
+    );
+    if (!$item) {
+        return array('id' => null);   
+    } else {
+			return array('id' => $item[0]['id']);   
+		}
+	
+}
\ No newline at end of file
-- 
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