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filters: MDL-7336 function to get the information the local settings page will need.

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tjhunt
2009-04-13 07:07:03 +00:00
parent 3058afd429
commit a042675877
2 changed files with 88 additions and 1 deletions
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lib/filterlib.php
+40
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@@ -649,6 +649,46 @@ function filter_get_active_in_context($context) {
return $filters;
}
/**
* List all of the filters that are available in this context, and what the
* local and interited states of that filter are.
* @param object $context a context that is not the system context.
* @return array an array with filter names, for example 'filter/tex' or
* 'mod/glossary' as keys. and and the values are objects with fields:
* ->filter filter name, same as the key.
* ->localstate TEXTFILTER_ON/OFF/INHERIT
* ->inheritedstate TEXTFILTER_ON/OFF - the state that will be used if localstate is set to TEXTFILTER_INHERIT.
*/
function filter_get_available_in_context($context) {
global $DB;
// The complex logic is working out the active state in the parent context,
// so strip the current context from the list.
$contextids = explode('/', trim($context->path, '/'));
array_pop($contextids);
$contextids = implode(',', $contextids);
if (empty($contextids)) {
throw new coding_exception('filter_get_available_in_context cannot be called with the system context.');
}
// The following SQL is tricky, in the same way at the SQL in filter_get_active_in_context.
return $DB->get_records_sql(
"SELECT parent_states.filter,
CASE WHEN fa.active IS NULL THEN " . TEXTFILTER_INHERIT . "
ELSE fa.active END AS localstate,
parent_states.inheritedstate
FROM (SELECT f.filter,
CASE WHEN MAX(f.active * ctx.depth) > -MIN(f.active * ctx.depth) THEN " . TEXTFILTER_ON . "
ELSE " . TEXTFILTER_OFF . " END AS inheritedstate
FROM {filter_active} f
JOIN {context} ctx ON f.contextid = ctx.id
WHERE ctx.id IN ($contextids)
GROUP BY filter
HAVING MIN(f.active) > " . TEXTFILTER_DISABLED . "
ORDER BY MAX(f.sortorder)) parent_states
LEFT JOIN {filter_active} fa ON fa.filter = parent_states.filter AND fa.contextid = $context->id");
}
/**
* This function is for use by the filter administration page.
* @return array 'filtername' => object with fields 'filter' (=filtername), 'active' and 'sortorder'