Add permutations; exploit open.

app/agora.py

@@ -145,8 +145,13 @@ def jump():
 def node(node):
 
     n = G.node(node)
-    # earlier in the list means more highly ranked.
-    n.subnodes = util.uprank(n.subnodes, users=['agora', 'flancian'])
+    if n.subnodes:
+        # earlier in the list means more highly ranked.
+        n.subnodes = util.uprank(n.subnodes, users=['agora', 'flancian'])
+        permutations = []
+    # if it's a 404, include permutations.
+    else:
+        permutations = G.existing_permutations(node)
 
     search_subnodes = db.search_subnodes(node)
 
@@ -154,7 +159,7 @@ def node(node):
             'node_rendered.html', 
             node=n,
             backlinks=n.back_links(),
-            pull_nodes=n.pull_nodes() if n else [],
+            pull_nodes=n.pull_nodes() if n.subnodes else permutations,
             forwardlinks=n.forward_links() if n else [],
             search=search_subnodes,
             pulling_nodes=n.pulling_nodes(),

app/db.py

@@ -14,6 +14,7 @@
 
 import cachetools.func
 import glob
+import itertools
 import re
 import os
 from . import config
@@ -64,6 +65,15 @@ class Graph:
             # Return an empty.
             return Node(uri)
 
+    def existing_permutations(self, uri):
+        # looks up nodes matching a permutation of the tokenized uri.
+        # 
+        # example use: if [[server-agora]] does not exist, serve [[agora-server]]
+        permutations = itertools.permutations(uri.split('-'))
+        permutations = ['-'.join(permutation) for permutation in permutations]
+        nodes = [node for node in G.nodes() if node.wikilink in permutations and node.subnodes]
+        return nodes
+
     @cachetools.func.ttl_cache(maxsize=2, ttl=20)
     def nodes(self, include_journals=True):
         # returns a list of all nodes

app/templates/node_rendered.html

@@ -23,7 +23,8 @@ No node found at [[{{node.uri}}]].
 <br /><br />
 If you <a href="https://flancia.org/go/agora">contributed a subnode</a> that mapped to '{{node.uri}}' in the Agora, this node would exist :)
 <br /><br />
-Try listing all <a href="/nodes">nodes</a> or perhaps <a href="/search">search</a>.
+Try listing all <a href="/nodes">nodes</a>.<br/><br />
+<strong>Any existing permutations</strong> are automatically pulled below.<br/>
 </div>
 {% endif %}