mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
8a1b1960c0
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@99601 467b73ca-7a2a-4603-9d3b-597d59a354a9
740 lines
20 KiB
PHP
Executable File
740 lines
20 KiB
PHP
Executable File
<?php
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/**
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* Represents a permission assigned to a group.
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* @package sapphire
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* @subpackage security
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*/
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class Permission extends DataObject {
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// the (1) after Type specifies the DB default value which is needed for
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// upgrades from older SilverStripe versions
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static $db = array(
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"Code" => "Varchar",
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"Arg" => "Int",
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"Type" => "Int(1)"
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);
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static $has_one = array(
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"Group" => "Group"
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);
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static $indexes = array(
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"Code" => true
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);
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static $defaults = array(
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"Type" => 1
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);
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static $has_many = array();
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static $many_many = array();
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static $belongs_many_many = array();
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/**
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* This is the value to use for the "Type" field if a permission should be
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* granted.
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*/
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const GRANT_PERMISSION = 1;
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/**
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* This is the value to use for the "Type" field if a permission should be
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* denied.
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*/
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const DENY_PERMISSION = -1;
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/**
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* This is the value to use for the "Type" field if a permission should be
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* inherited.
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*/
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const INHERIT_PERMISSION = 0;
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/**
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* Method to globally disable "strict" checking, which means a permission
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* will be granted if the key does not exist at all.
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*
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* @var bool
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*/
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static $declared_permissions = null;
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/**
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* Linear list of declared permissions in the system.
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*
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* @var array
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*/
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protected static $declared_permissions_list = null;
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/**
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* @var $strict_checking Boolean Method to globally disable "strict" checking,
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* which means a permission will be granted if the key does not exist at all.
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*/
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static $strict_checking = true;
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/**
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* If this setting is set, then permissions can imply other permissions
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*
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* @var bool
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*/
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static $implied_permissions = false;
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/**
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* Set to false to prevent the 'ADMIN' permission from implying all
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* permissions in the system
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*
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* @var bool
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*/
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static $admin_implies_all = true;
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/**
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* a list of permission codes which doesn't appear in the Permission list
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* when make the {@link PermissionCheckboxSetField}
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* @var array;
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*/
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static $hidden_permissions = array();
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/**
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* Check that the current member has the given permission.
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*
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* @param string $code Code of the permission to check (case-sensitive)
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* @param string $arg Optional argument (e.g. a permissions for a specific page)
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* @param int|Member $member Optional member instance or ID. If set to NULL, the permssion
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* will be checked for the current user
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* @param bool $strict Use "strict" checking (which means a permission
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* will be granted if the key does not exist at all)?
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* @return int|bool The ID of the permission record if the permission
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* exists; FALSE otherwise. If "strict" checking is
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* disabled, TRUE will be returned if the permission does not exist at all.
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*/
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public static function check($code, $arg = "any", $member = null, $strict = true) {
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if(!$member) {
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if(!Member::currentUserID()) {
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return false;
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}
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$member = Member::currentUserID();
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}
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return self::checkMember($member, $code, $arg, $strict);
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}
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/**
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* Permissions cache. The format is a map, where the keys are member IDs, and the values are
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* arrays of permission codes.
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*/
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private static $cache_permissions = array();
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/**
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* Flush the permission cache, for example if you have edited group membership or a permission record.
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* @todo Call this whenever Group_Members is added to or removed from
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*/
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public static function flush_permission_cache() {
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self::$cache_permissions = array();
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}
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/**
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* Check that the given member has the given permission.
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*
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* @param int|Member memberID The ID of the member to check. Leave blank for the current member.
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* Alternatively you can use a member object.
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* @param string|array $code Code of the permission to check (case-sensitive)
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* @param string $arg Optional argument (e.g. a permissions for a specific page)
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* @param bool $strict Use "strict" checking (which means a permission
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* will be granted if the key does not exist at all)?
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* @return int|bool The ID of the permission record if the permission
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* exists; FALSE otherwise. If "strict" checking is
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* disabled, TRUE will be returned if the permission does not exist at all.
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*/
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public static function checkMember($member, $code, $arg = "any", $strict = true) {
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if(!$member) {
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$memberID = $member = Member::currentUserID();
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} else {
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$memberID = (is_object($member)) ? $member->ID : $member;
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}
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if($arg == 'any') {
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// Cache the permissions in memory
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if(!isset(self::$cache_permissions[$memberID])) {
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self::$cache_permissions[$memberID] = self::permissions_for_member($memberID);
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}
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// If $admin_implies_all was false then this would be inefficient, but that's an edge
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// case and this keeps the code simpler
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if(!is_array($code)) $code = array($code);
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if(self::$admin_implies_all) $code[] = "ADMIN";
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// Multiple $code values - return true if at least one matches, ie, intersection exists
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return (bool)array_intersect($code, self::$cache_permissions[$memberID]);
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}
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// The following code should only be used if you're not using the "any" arg. This is kind
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// of obselete functionality and could possibly be deprecated.
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$groupList = self::groupList($memberID);
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if(!$groupList) return false;
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$groupCSV = implode(", ", $groupList);
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// Arg component
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switch($arg) {
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case "any":
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$argClause = "";
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break;
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case "all":
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$argClause = " AND \"Arg\" = -1";
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break;
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default:
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if(is_numeric($arg)) {
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$argClause = "AND \"Arg\" IN (-1, $arg) ";
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} else {
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user_error("Permission::checkMember: bad arg '$arg'", E_USER_ERROR);
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}
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}
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if(is_array($code)) {
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$SQL_codeList = "'" . implode("', '", Convert::raw2sql($code)) . "'";
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} else {
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$SQL_codeList = "'" . Convert::raw2sql($code) . "'";
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}
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$SQL_code = Convert::raw2sql($code);
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$adminFilter = (self::$admin_implies_all) ? ",'ADMIN'" : '';
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// Raw SQL for efficiency
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$permission = DB::query("
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SELECT \"ID\"
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FROM \"Permission\"
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WHERE (
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\"Code\" IN ($SQL_codeList $adminFilter)
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AND \"Type\" = " . self::GRANT_PERMISSION . "
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AND \"GroupID\" IN ($groupCSV)
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$argClause
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)
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")->value();
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if($permission) return $permission;
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// Strict checking disabled?
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if(!self::$strict_checking || !$strict) {
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$hasPermission = DB::query("
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SELECT COUNT(*)
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FROM \"Permission\"
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WHERE (
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(\"Code\" IN '$SQL_code')'
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AND (\"Type\" = " . self::GRANT_PERMISSION . ")
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)
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")->value();
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if(!$hasPermission) return;
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}
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return false;
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}
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/**
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* Get all the 'any' permission codes available to the given member.
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* @return array();
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*/
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public static function permissions_for_member($memberID) {
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$groupList = self::groupList($memberID);
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if($groupList) {
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$groupCSV = implode(", ", $groupList);
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// Raw SQL for efficiency
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return array_unique(DB::query("
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SELECT \"Code\"
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FROM \"Permission\"
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WHERE \"Type\" = " . self::GRANT_PERMISSION . " AND \"GroupID\" IN ($groupCSV)
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UNION
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SELECT \"Code\"
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FROM \"PermissionRoleCode\" AS PRC
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INNER JOIN \"PermissionRole\" AS PR ON PRC.\"RoleID\" = PR.\"ID\"
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INNER JOIN \"Group_Roles\" AS GR ON GR.\"PermissionRoleID\" = PR.\"ID\"
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WHERE \"GroupID\" IN ($groupCSV)
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")->column());
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} else {
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return array();
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}
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}
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/**
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* Get the list of groups that the given member belongs to.
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*
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* Call without an argument to get the groups that the current member
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* belongs to. In this case, the results will be session-cached.
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*
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* @param int $memberID The ID of the member. Leave blank for the current
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* member.
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* @return array Returns a list of group IDs to which the member belongs
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* to or NULL.
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*/
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public static function groupList($memberID = null) {
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// Default to current member, with session-caching
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if(!$memberID) {
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$member = Member::currentUser();
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if($member && isset($_SESSION['Permission_groupList'][$member->ID]))
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return $_SESSION['Permission_groupList'][$member->ID];
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} else {
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$member = DataObject::get_by_id("Member", $memberID);
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}
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if($member) {
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// Build a list of the IDs of the groups. Most of the heavy lifting
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// is done by Member::Groups
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// NOTE: This isn't effecient; but it's called once per session so
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// it's a low priority to fix.
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$groups = $member->Groups();
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$groupList = array();
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if($groups) {
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foreach($groups as $group)
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$groupList[] = $group->ID;
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}
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// Session caching
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if(!$memberID) {
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$_SESSION['Permission_groupList'][$member->ID] = $groupList;
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}
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return isset($groupList) ? $groupList : null;
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}
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}
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/**
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* Grant the given permission code/arg to the given group
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*
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* @param int $groupID The ID of the group
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* @param string $code The permission code
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* @param string Optional: The permission argument (e.g. a page ID).
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* @returns Permission Returns the new permission object.
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*/
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public static function grant($groupID, $code, $arg = "any") {
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$perm = new Permission();
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$perm->GroupID = $groupID;
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$perm->Code = $code;
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$perm->Type = self::GRANT_PERMISSION;
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// Arg component
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switch($arg) {
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case "any":
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break;
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case "all":
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$perm->Arg = -1;
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default:
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if(is_numeric($arg)) {
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$perm->Arg = $arg;
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} else {
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user_error("Permission::checkMember: bad arg '$arg'",
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E_USER_ERROR);
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}
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}
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$perm->write();
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return $perm;
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}
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/**
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* Deny the given permission code/arg to the given group
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*
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* @param int $groupID The ID of the group
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* @param string $code The permission code
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* @param string Optional: The permission argument (e.g. a page ID).
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* @returns Permission Returns the new permission object.
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*/
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public static function deny($groupID, $code, $arg = "any") {
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$perm = new Permission();
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$perm->GroupID = $groupID;
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$perm->Code = $code;
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$perm->Type = self::DENY_PERMISSION;
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// Arg component
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switch($arg) {
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case "any":
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break;
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case "all":
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$perm->Arg = -1;
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default:
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if(is_numeric($arg)) {
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$perm->Arg = $arg;
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} else {
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user_error("Permission::checkMember: bad arg '$arg'",
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E_USER_ERROR);
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}
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}
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$perm->write();
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return $perm;
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}
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/**
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* Add default records to database.
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*
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* This function is called whenever the database is built, after the
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* database tables have all been created.
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*/
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public function requireDefaultRecords() {
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parent::requireDefaultRecords();
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// Add default content if blank
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if(!DB::query("SELECT \"ID\" FROM \"Permission\"")->value() && array_key_exists('CanCMSAdmin', DB::fieldList('Group'))) {
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$admins = DB::query("SELECT \"ID\" FROM \"Group\" WHERE \"CanCMSAdmin\" = 1")
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->column();
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if(isset($admins)) {
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foreach($admins as $admin)
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Permission::grant($admin, "ADMIN");
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}
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$authors = DB::query("SELECT \"ID\" FROM \"Group\" WHERE \"CanCMS\" = 1")
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->column();
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if(isset($authors)) {
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foreach($authors as $author) {
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Permission::grant($author, "CMS_ACCESS_CMSMain");
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Permission::grant($author, "CMS_ACCESS_AssetAdmin");
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Permission::grant($author, "CMS_ACCESS_NewsletterAdmin");
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Permission::grant($author, "CMS_ACCESS_ReportAdmin");
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}
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}
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}
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}
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/**
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* Returns all members for a specific permission.
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*
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* @param $code String|array Either a single permission code, or a list of permission codes
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* @return DataObjectSet Returns a set of member that have the specified
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* permission.
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*/
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public static function get_members_by_permission($code) {
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$groupIDs = array();
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$SQL_codeList = (is_array($code)) ? implode("','", Convert::raw2sql($code)) : Convert::raw2sql($code);
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$SQL_filter = "\"Permission\".\"Code\" IN ('" . $SQL_codeList . "') " .
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"AND \"Permission\".\"Type\" = " . self::GRANT_PERMISSION;
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$toplevelGroups = DataObject::get(
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'Group',
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$SQL_filter, // filter
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null, // limit
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"LEFT JOIN \"Permission\" ON \"Group\".\"ID\" = \"Permission\".\"GroupID\""
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);
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if(!$toplevelGroups)
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return false;
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foreach($toplevelGroups as $group) {
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$familyIDs = $group->collateFamilyIDs();
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if(is_array($familyIDs)) {
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$groupIDs = array_merge($groupIDs, array_values($familyIDs));
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}
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}
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if(!count($groupIDs))
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return false;
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$members = DataObject::get(
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Object::getCustomClass('Member'),
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$_filter = "\"Group\".\"ID\" IN (" . implode(",",$groupIDs) . ")",
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$_sort = "",
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$_join = "LEFT JOIN \"Group_Members\" ON \"Member\".\"ID\" = \"Group_Members\".\"MemberID\" " .
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"LEFT JOIN \"Group\" ON \"Group_Members\".\"GroupID\" = \"Group\".\"ID\" "
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);
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return $members;
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}
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/**
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* Return all of the groups that have one of the given permission codes
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* @param $codes array|string Either a single permission code, or an array of permission codes
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* @return DataObjectSet The matching group objects
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*/
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static function get_groups_by_permission($codes) {
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if(!is_array($codes)) $codes = array($codes);
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$SQLa_codes = Convert::raw2sql($codes);
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$SQL_codes = join("','", $SQLa_codes);
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return DataObject::get(
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'Group',
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"\"Permission\".\"Code\" IN ('$SQL_codes')",
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"",
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"LEFT JOIN \"Permission\" ON \"Group\".\"ID\" = \"Permission\".\"GroupID\""
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);
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}
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/**
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* Get a list of all available permission codes
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*
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* @param bool|string $blankItemText Text for permission with the empty
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* code (""). If set to TRUE it will be
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* set to "(select)"; if set to NULL or
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* FALSE the empty permission is not
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* included in the list.
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* @return array Returns an array of all available permission codes. The
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* array indicies are the permission codes as used in
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* {@link Permission::check()}. The value is a description
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* suitable for using in an interface.
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*/
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public static function get_codes($blankItemText = null) {
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$classes = ClassInfo::implementorsOf('PermissionProvider');
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$allCodes = array();
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// if($blankItemText){
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// $allCodes[''] = ($blankItemText === true)
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// ? '(select)'
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// : $blankItemText;
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// }
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$adminCategory = _t('Permission.AdminGroup', 'Administrator');
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$allCodes[$adminCategory]['ADMIN'] = array(
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'name' => _t('Permission.FULLADMINRIGHTS', 'Full administrative rights'),
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'help' => null,
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'sort' => 100000
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);
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if($classes) foreach($classes as $class) {
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$SNG = singleton($class);
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if($SNG instanceof TestOnly) continue;
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$someCodes = $SNG->providePermissions();
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if($someCodes) {
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foreach($someCodes as $k => $v) {
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if (is_array($v)) {
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// There must be a category and name key.
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if (!isset($v['category'])) user_error("The permission $k must have a category key", E_USER_WARNING);
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if (!isset($v['name'])) user_error("The permission $k must have a name key", E_USER_WARNING);
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if (!isset($allCodes[$v['category']])) $allCodes[$v['category']] = array();
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$allCodes[$v['category']][$k] = array(
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'name' => $v['name'],
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'help' => isset($v['help']) ? $v['help'] : null,
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'sort' => isset($v['sort']) ? $v['sort'] : 0
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);
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} else {
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$allCodes['Other'][$k] = array(
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'name' => $v,
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'help' => null,
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'sort' => 0
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);
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}
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}
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}
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}
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$flatCodeArray = array();
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foreach($allCodes as $category) foreach($category as $code => $permission) $flatCodeArray[] = $code;
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$otherPerms = DB::query("SELECT DISTINCT \"Code\" From \"Permission\"")->column();
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if($otherPerms) foreach($otherPerms as $otherPerm) {
|
|
if(!in_array($otherPerm, $flatCodeArray))
|
|
$allCodes['Other'][$otherPerm] = array(
|
|
'name' => $otherPerm,
|
|
'help' => null,
|
|
'sort' => 0
|
|
);
|
|
}
|
|
|
|
ksort($allCodes);
|
|
|
|
foreach($allCodes as $category => $permissions) {
|
|
uasort($permissions, array(__CLASS__, 'sort_permissions'));
|
|
$allCodes[$category] = $permissions;
|
|
}
|
|
|
|
return $allCodes;
|
|
}
|
|
|
|
/**
|
|
* Sort permissions based on their sort value, or name
|
|
*
|
|
*/
|
|
static function sort_permissions($a, $b) {
|
|
if ($a['sort'] == $b['sort']) {
|
|
// Same sort value, do alpha instead
|
|
return strcmp($a['name'], $b['name']);
|
|
} else {
|
|
// Just numeric.
|
|
return $a['sort'] < $b['sort'] ? -1 : 1;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* add a permission represented by the $code to the {@link slef::$hidden_permissions} list
|
|
*
|
|
* @param $code string - the permissions code
|
|
* @return void
|
|
*/
|
|
static function add_to_hidden_permissions($code){
|
|
self::$hidden_permissions[] = $code;
|
|
}
|
|
|
|
/**
|
|
* remove a permission represented by the $code from the {@link slef::$hidden_permissions} list
|
|
*
|
|
* @param $code string - the permissions code
|
|
* @return void
|
|
*/
|
|
static function remove_from_hidden_permissions($code){
|
|
self::$hidden_permissions = array_diff(self::$hidden_permissions, array($code));
|
|
}
|
|
|
|
/**
|
|
* Declare an array of permissions for the system.
|
|
*
|
|
* Permissions can be grouped by nesting arrays. Scalar values are always
|
|
* treated as permissions.
|
|
*
|
|
* @param array $permArray A (possibly nested) array of permissions to
|
|
* declare for the system.
|
|
*/
|
|
static function declare_permissions($permArray) {
|
|
if(is_array(self::$declared_permissions)) {
|
|
self::$declared_permissions =
|
|
array_merge_recursive(self::$declared_permissions, $permArray);
|
|
}
|
|
else {
|
|
self::$declared_permissions = $permArray;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get a linear list of the permissions in the system.
|
|
*
|
|
* @return array Linear list of declared permissions in the system.
|
|
*/
|
|
public static function get_declared_permissions_list() {
|
|
if(!self::$declared_permissions)
|
|
return null;
|
|
|
|
if(self::$declared_permissions_list)
|
|
return self::$declared_permissions_list;
|
|
|
|
self::$declared_permissions_list = array();
|
|
|
|
self::traverse_declared_permissions(self::$declared_permissions,
|
|
self::$declared_permissions_list);
|
|
|
|
return self::$declared_permissions_list;
|
|
}
|
|
|
|
/**
|
|
* Look up the human-readable title for the permission as defined by <code>Permission::declare_permissions</code>
|
|
*
|
|
* @param $perm Permission code
|
|
* @return Label for the given permission, or the permission itself if the label doesn't exist
|
|
*/
|
|
public static function get_label_for_permission($perm) {
|
|
$list = self::get_declared_permissions_list();
|
|
if(array_key_exists($perm, $list)) return $list[$perm];
|
|
return $perm;
|
|
}
|
|
|
|
/**
|
|
* Recursively traverse the nested list of declared permissions and create
|
|
* a linear list.
|
|
*
|
|
* @param aeeay $declared Nested structure of permissions.
|
|
* @param $list List of permissions in the structure. The result will be
|
|
* written to this array.
|
|
*/
|
|
protected static function traverse_declared_permissions($declared,
|
|
&$list) {
|
|
if(!is_array($declared))
|
|
return;
|
|
|
|
foreach($declared as $perm => $value) {
|
|
if($value instanceof Permission_Group) {
|
|
$list[] = $value->getName();
|
|
self::traverse_declared_permissions($value->getPermissions(), $list);
|
|
} else {
|
|
$list[$perm] = $value;
|
|
}
|
|
}
|
|
}
|
|
|
|
public function onBeforeWrite() {
|
|
parent::onBeforeWrite();
|
|
|
|
// Just in case we've altered someone's permissions
|
|
Permission::flush_permission_cache();
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Permission_Group class
|
|
*
|
|
* This class is used to group permissions together for showing on an
|
|
* interface.
|
|
* @package sapphire
|
|
* @subpackage security
|
|
*/
|
|
class Permission_Group {
|
|
|
|
/**
|
|
* Name of the permission group (can be used as label in an interface)
|
|
* @var string
|
|
*/
|
|
protected $name;
|
|
|
|
/**
|
|
* Associative array of permissions in this permission group. The array
|
|
* indicies are the permission codes as used in
|
|
* {@link Permission::check()}. The value is suitable for using in an
|
|
* interface.
|
|
* @var string
|
|
*/
|
|
protected $permissions = array();
|
|
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* @param string $name Text that could be used as label used in an
|
|
* interface
|
|
* @param array $permissions Associative array of permissions in this
|
|
* permission group. The array indicies are the
|
|
* permission codes as used in
|
|
* {@link Permission::check()}. The value is
|
|
* suitable for using in an interface.
|
|
*/
|
|
public function __construct($name, $permissions) {
|
|
$this->name = $name;
|
|
$this->permissions = $permissions;
|
|
}
|
|
|
|
/**
|
|
* Get the name of the permission group
|
|
*
|
|
* @return string Name (label) of the permission group
|
|
*/
|
|
public function getName() {
|
|
return $this->name;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get permissions
|
|
*
|
|
* @return array Associative array of permissions in this permission
|
|
* group. The array indicies are the permission codes as
|
|
* used in {@link Permission::check()}. The value is
|
|
* suitable for using in an interface.
|
|
*/
|
|
public function getPermissions() {
|
|
return $this->permissions;
|
|
}
|
|
}
|
|
|
|
?>
|