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course categories: MDL-17502 when deleting a category and its contents, check moodle/course:delete capability.

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* Note: this would never lead to problems with default role definions.
* Also ended up mostly rewriting delete_category_form to simplify the messages that are displayed.
* New helper function require_all_capabilities, a bit like require_any_capability.
This commit is contained in:
tjhunt 2008-12-08 07:28:19 +00:00
parent fc11edbfa0
commit 8a1b1c328d
6 changed files with 119 additions and 42 deletions
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24
lib/accesslib.php
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@ -37,6 +37,8 @@
*
* Whether the user can do something...
* - has_capability()
* - has_any_capability()
* - has_all_capabilities()
* - require_capability()
* - require_login() (from moodlelib)
*
@ -496,6 +498,28 @@ function has_any_capability($capabilities, $context, $userid=NULL, $doanything=t
return false;
}
/**
* This function returns whether the current user has all of the capabilities in the
* $capabilities array. This is a simple wrapper around has_capability for convinience.
*
* There are probably tricks that could be done to improve the performance here, for example,
* check the capabilities that are already cached first.
*
* @param array $capabilities - an array of capability names.
* @param object $context - a context object (record from context table)
* @param integer $userid - a userid number, empty if current $USER
* @param bool $doanything - if false, ignore do anything
* @return bool
*/
function has_all_capabilities($capabilities, $context, $userid=NULL, $doanything=true) {
foreach ($capabilities as $capability) {
if (!has_capability($capability, $context, $userid, $doanything)) {
return false;
}
}
return true;
}
/**
* Uses 1 DB query to answer whether a user is an admin at the sitelevel.
* It depends on DB schema >=1.7 but does not depend on the new datastructures