1 files changed, 41 insertions, 0 deletions
diff --git a/static-files/js/comment-submission.js b/static-files/js/comment-submission.js
new file mode 100644
index 0000000..13c3849
--- /dev/null
+++ b/static-files/js/comment-submission.js
@@ -0,0 +1,41 @@
+// Copyright 2011, Matthias Andreas Benkard.
+
+"use strict";
+
+jQuery(function($) {
+  var acceptable_cashhash = function (hash) {
+    return (hash[0] === '0' &&
+            hash[1] === '0' &&
+            hash[2] === '0' &&
+            hash[3] === '0');
+  };
+
+  var form_augmented_p = false;
+  $('.comment-form').submit(function() {
+    var form = $(this);
+    $.ajax({
+      url: "/RPC/generate-transaction-key",
+      dataType: 'json',
+      success: function(tkey) {
+        if (!form_augmented_p) {
+          form.find(':submit').attr("disabled", true);
+          var salt = 0;
+          var text = form.find('textarea');
+          while (!acceptable_cashhash(Sha256.hash(text + ":" + tkey + ":" + salt))) {
+            salt++;
+          }
+          form.prepend('<input type="hidden" name="transaction-key" value="' + tkey + '" />');
+          form.prepend('<input type="hidden" name="salt"            value="' + salt + '" />');
+          form_augmented_p = true;
+          form.submit();
+          return false;
+        } else {
+          return true;
+        }
+      }
+    });
+    return false;
+  });
+  $('.spam-detection-method').text("Hashcash");
+  $('.irrelevant-for-hashcash').text('');
+});