[development] Mapping aliases to menu items when having multiple aliases

[Olivier Jacquet]

I'm looking for a way to create a module that allows you to map which 
url alias you want to associate with a specific menu entry when you have 
more than one alias associated with a system path. I've investigated 
this and cannot seem to find a way to implement it.

The path module lets you create multiple url aliases for a node. The 
paths some-path and other-path can both be pointed to node/1. When 
someone creates a menu item and uses some-path to create it it's 
converted to node/1 and it is that path that is stored in the menu_links 
table.

Then, in the case of the blocks generated by the menu module links are 
rendered through theme_menu_item_link() which calls l() which uses the 
first alias it finds and for the primary/secondary menu it's usualy 
theme('links', array()) which also results in a call to l(). In the 
former theme function you have access to the mlid but in the latter you 
haven't. This means there is no sane way to accomplish the functionality 
I want, I think.

Does anyone have suggestions to accomplish this?

The reason I want this is that I want to store context in the url alias, 
eg. context1/about and context2/about which point to the same node. This 
allows showing different blocks when navigating through a specific 
context. Maybe there is another way to achieve this?

Note: I'm aware of duplicate content issues etc.