Adds group support to the core search API and the Solr search engine.
This allows for:
* User searching by group (in the API only, no interface yet)
* Automatically restrict search results by group (in some cases like
separate-groups forums)
Ensures that Solr will return available results, even if there are many
misses when using check_access(), by asking Solr for more results if the
counter says there should be more.
Improves performance by ending processing as soon as the requested page
of results is processed. Remaining number of pages is an "estimate"
based on the total result count from Solr and how many items we have
rejected up to this point.
Introducing both APIs in moodle along with:
- search_box widget to add a tiny search box
- admin settings with setup steps helper
- cache for search results
- template for a search result
- php unit stuff
Many thanks to Tomasz Muras, Prateek Sachan and Daniel Neis for their contributions, for starting this development
and for pushing for it to be completed. Also thanks to other contributors: Jonathan Harker and eugeneventer.
sam marshall