From e0887aca95abf7cda633573d66abea6cbc7ca73d Mon Sep 17 00:00:00 2001
From: Jochen Topf <jochen@topf.org>
Date: Mon, 19 May 2014 10:08:55 +0200
Subject: Disable comparison function if cookies are disabled in the browser.

---
 web/public/js/taginfo.js | 10 ++++++++++
 web/views/key.erb        | 12 ++++++++----
 web/views/tag.erb        | 12 ++++++++----
 3 files changed, 26 insertions(+), 8 deletions(-)

(limited to 'web')

diff --git a/web/public/js/taginfo.js b/web/public/js/taginfo.js
index c800f2f..0604e03 100644
--- a/web/public/js/taginfo.js
+++ b/web/public/js/taginfo.js
@@ -582,6 +582,16 @@ function open_help() {
 
 /* ============================ */
 
+function cookies_enabled() {
+    var cookieEnabled = (navigator.cookieEnabled) ? true : false;
+
+    if (typeof navigator.cookieEnabled == "undefined" && !cookieEnabled) {
+        document.cookie="testcookie";
+        cookieEnabled = (document.cookie.indexOf("testcookie") != -1) ? true : false;
+    }
+    return (cookieEnabled);
+}
+
 function get_comparison_list() {
     return jQuery.cookie('taginfo_comparison_list') || [];
 }
diff --git a/web/views/key.erb b/web/views/key.erb
index de1dc83..316529c 100644
--- a/web/views/key.erb
+++ b/web/views/key.erb
@@ -122,10 +122,14 @@ function page_init2() {
         key = #{ @key.to_json };
     jQuery('h1').html(fmt_key(key));
 
-    comparison_list_update(key);
-    jQuery('#list').bind('change', function() {
-        comparison_list_change(key);
-    });
+    if (cookies_enabled()) {
+        comparison_list_update(key);
+        jQuery('#list').bind('change', function() {
+            comparison_list_change(key);
+        });
+    } else {
+        jQuery('#list-form').html('<span class="empty" style="position: relative; top: 1px;">Enable cookies for comparison function!</span>');
+    }
 
     jQuery('#level0_button').bind('click', function() {
         return level0_editor('#{ TaginfoConfig.get('level0.overpass_url_prefix') }', '#{ TaginfoConfig.get('level0.level0_url_prefix') }', filter, key, undefined);
diff --git a/web/views/tag.erb b/web/views/tag.erb
index f80d5ce..391d193 100644
--- a/web/views/tag.erb
+++ b/web/views/tag.erb
@@ -121,10 +121,14 @@ function page_init2() {
     up = function() { window.location = url_for_key(key); };
     jQuery('h1').html(link_to_key(key) + '=' + fmt_value(value));
 
-    comparison_list_update(key, value);
-    jQuery('#list').bind('change', function() {
-        comparison_list_change(key, value);
-    });
+    if (cookies_enabled()) {
+        comparison_list_update(key, value);
+        jQuery('#list').bind('change', function() {
+            comparison_list_change(key, value);
+        });
+    } else {
+        jQuery('#list-form').html('<span class="empty" style="position: relative; top: 1px;">Enable cookies for comparison function!</span>');
+    }
 
     jQuery('span#keylink').html(link_to_key(key));
     jQuery('span#relationlink').html(link_to_rtype(value));
-- 
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