# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1445203477 -7200
# Node ID fc2d5f82623677d6183fb8f621b9dcbf74c0a91c
# Parent  ad1bb10e0e30468eda62dfae19c840aa095de1d6
Support links to the main resource in the link_to method.

diff -r ad1bb10e0e30 -r fc2d5f826236 imipweb/resource.py
--- a/imipweb/resource.py	Sun Oct 18 19:33:04 2015 +0200
+++ b/imipweb/resource.py	Sun Oct 18 23:24:37 2015 +0200
@@ -83,16 +83,20 @@
         self.new_page(title="Redirect")
         self.page.p("Redirecting to: %s" % url)
 
-    def link_to(self, uid, recurrenceid=None, args=None):
+    def link_to(self, uid=None, recurrenceid=None, args=None):
 
         """
-        Return a link to an object with the given 'uid' and 'recurrenceid'.
+        Return a link to a resource, being an object with any given 'uid' and
+        'recurrenceid', or the main resource otherwise.
+
         See get_identifiers for the decoding of such links.
 
         If 'args' is specified, the given dictionary is encoded and included.
         """
 
-        path = [uid]
+        path = []
+        if uid:
+            path.append(uid)
         if recurrenceid:
             path.append(recurrenceid)
         return "%s%s" % (self.env.new_url("/".join(path)), args and ("?%s" % urlencode(args)) or "")