add pledge logic

languages/en-us.js

@@ -160,6 +160,7 @@ module.exports.strings = {
   WISHLIST_PLEDGE_SUCCESS: 'Successfully pledged for item!',
   WISHLIST_PLEDGE: 'Pledge',
   WISHLIST_PLEDGED: pledgedBy => `Pledged for by ${pledgedBy}`,
+  WISHLIST_PLEDGED_GUEST: 'Pledged for by a guest user',
   WISHLIST_PRICE: 'Price',
   WISHLIST_REFRESH_GUARD: 'Invalid user',
   WISHLIST_REFRESH_NO_URL: 'Item has no URL.',

views/wishlist.pug

@@ -113,6 +113,9 @@ block content
                           .control.inline
                             input.inline.button(type='submit' value=lang('WISHLIST_UNPLEDGE'))
                     if item.pledgedBy && item.pledgedBy !== req.user._id
+                      if item.pledgedBy === '_CCUNKNOWN'
+                        span.ugc=lang('WISHLIST_PLEDGED_GUEST')
+                      else
                         span.ugc=lang('WISHLIST_PLEDGED', item.pledgedBy)
                 td(data-label='Delete Item')
                   form.inline(