Has anyone done any mods to the core module to allow rolling up of events from subportals to a single master calendar? What I want to do is display the rollup similar to how it works now with sub calendars withi na single site, but across all portals within a single install.
What I want to do is have it roll up only items flagged at high priority, and only have it roll up to the master calendar, ie not rollup acorss subportals or down levels.
Any suggestions on how to approach this with the fewest core modeule changes? Any thoughts or ideas would be appreciated.