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[Mahara Bot <1467368@xxxxxxxxxxxxxxxxxx>]

Reviewed:  https://reviews.mahara.org/4887
Committed: https://git.nzoss.org.nz/mahara/mahara/commit/ec41d0e056a5268e27b28b4198a0f696c7c47226
Submitter: Aaron Wells (aaronw@xxxxxxxxxxxxxxx)
Branch:    master

commit ec41d0e056a5268e27b28b4198a0f696c7c47226
Author: Robert Lyon <robertl@xxxxxxxxxxxxxxx>
Date:   Mon Jun 22 15:56:51 2015 +1200

Bug 1467368: Allowing the main menu structure to be cached

This will allow the rendering of the main nav to use less resources.

The cached menus are saved for each institution into the
institution_config table for these types of menus:

adminnav     - site administration navigation
instadminnav - institution admin navigation
staffnav     - site staff admin navigation
inststaffnav - institution staff admin navigation
standardnav  - navigation seen in normal section of site

To clear cache menus call clear_menu_cache($institution)

Change-Id: I3b58090830b6d28f10f24e23abeef775c6863aa5
Signed-off-by: Robert Lyon <robertl@xxxxxxxxxxxxxxx>

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https://bugs.launchpad.net/bugs/1467368

Title:
  cache the main navigation menu

Status in Mahara:
  Fix Committed

Bug description:
  Part of rendering the main navigation is it checks all the plugins to
  see if they want to add to the menu.

  This is not an ideal way of doing it. We should cache the main menu's
  $menu array in the database after first render and just use that.

  We should also have a clear_menu_cache($institution = null) function
  so that when the site or and institution updates it's config the
  related cached menus are cleared and able to generate again.

  We should also clear the menu cache when plugins are installed /
  removed / hidden / shown

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