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silverstripe-cms
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Fix #776 - Change how can_edit works 

Will now check the Stage recursivly, then Live.
This is still in need of refactoring, but fixes the immediate issue.
This commit is contained in:
Stephen Shkardoon 2014-07-07 19:25:09 +12:00
parent b6194c304d
commit d5634147b0
2 changed files with 142 additions and 79 deletions
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182
code/model/SiteTree.php
View File

@ -1046,6 +1046,54 @@ class SiteTree extends DataObject implements PermissionProvider,i18nEntityProvid
}
}
/**
* A wrapper method to batch_permission_check_stage, which checks can_edit permissions on a single
* stage.
*
* Caches based on $typeField data. To invalidate the cache, use {@link SiteTree::reset()}
* or set the $useCached property to FALSE.
*
* @param Array $ids Of {@link SiteTree} IDs
* @param Int $memberID Member ID
* @param String $typeField A property on the data record, e.g. "CanEditType".
* @param String $groupJoinTable A many-many table name on this record, e.g. "SiteTree_EditorGroups"
* @param String $siteConfigMethod Method to call on {@link SiteConfig} for toplevel items, e.g. "canEdit"
* @param String $globalPermission If the member doesn't have this permission code, don't bother iterating deeper.
* @param Boolean $useCached
* @return Array An map of {@link SiteTree} ID keys, to boolean values
*/
static public function batch_permission_check($ids, $memberID, $typeField, $groupJoinTable, $siteConfigMethod, $globalPermission = 'CMS_ACCESS_CMSMain', $useCached = true) {
// Sanatise the IDs
$ids = array_filter($ids, 'is_numeric');
// By default, no permission
$result = array_fill_keys($ids, false);
$cacheKey = "canEdit-$memberID";
if ($useCached && isset(self::$cache_permissions[$cacheKey])) {
// Before we start, we'll check the cache
$cachedValues = array_intersect_key(self::$cache_permissions[$cacheKey], $result);
$uncachedValues = array_diff_key($result, self::$cache_permissions[$cacheKey]);
if ($uncachedValues) {
$cachedValues = self::batch_permission_check(array_keys($uncachedValues), $memberID, $typeField, $groupJoinTable, $siteConfigMethod, $globalPermission, false) + $cachedValues;
}
return $cachedValues;
}
// First lets check the stage version, then the live
$results = self::batch_permission_check_stage($ids, $memberID, $typeField, $groupJoinTable, $siteConfigMethod, $globalPermission, 'Stage');
$results += self::batch_permission_check_stage($ids, $memberID, $typeField, $groupJoinTable, $siteConfigMethod, $globalPermission, 'Live');
if ($useCached) {
// Create an array if one doesn't already exist
if (empty(self::$cache_permissions[$cacheKey])) self::$cache_permissions[$cacheKey] = array();
// Store the cache results
self::$cache_permissions[$cacheKey] = $results + self::$cache_permissions[$cacheKey];
}
return $results;
}
/**
* This method is NOT a full replacement for the individual can*() methods, e.g. {@link canEdit()}.
* Rather than checking (potentially slow) PHP logic, it relies on the database group associations,
@ -1061,33 +1109,16 @@ class SiteTree extends DataObject implements PermissionProvider,i18nEntityProvid
* @param String $groupJoinTable A many-many table name on this record, e.g. "SiteTree_EditorGroups"
* @param String $siteConfigMethod Method to call on {@link SiteConfig} for toplevel items, e.g. "canEdit"
* @param String $globalPermission If the member doesn't have this permission code, don't bother iterating deeper.
* @param Boolean $useCached
* @param String $stage Either Stage or Live, determines which stage to check permissions for
* @return Array An map of {@link SiteTree} ID keys, to boolean values
*/
static public function batch_permission_check($ids, $memberID, $typeField, $groupJoinTable, $siteConfigMethod, $globalPermission = 'CMS_ACCESS_CMSMain', $useCached = true) {
static public function batch_permission_check_stage($ids, $memberID, $typeField, $groupJoinTable, $siteConfigMethod, $globalPermission = 'CMS_ACCESS_CMSMain', $stage = 'Stage') {
// Sanitise the IDs
$ids = array_filter($ids, 'is_numeric');
// This is the name used on the permission cache
// converts something like 'CanEditType' to 'edit'.
$cacheKey = strtolower(substr($typeField, 3, -4)) . "-$memberID";
// Default result: nothing editable
$result = array_fill_keys($ids, false);
if($ids) {
// Look in the cache for values
if($useCached && isset(self::$cache_permissions[$cacheKey])) {
$cachedValues = array_intersect_key(self::$cache_permissions[$cacheKey], $result);
// If we can't find everything in the cache, then look up the remainder separately
$uncachedValues = array_diff_key($result, self::$cache_permissions[$cacheKey]);
if($uncachedValues) {
$cachedValues = self::batch_permission_check(array_keys($uncachedValues), $memberID, $typeField, $groupJoinTable, $siteConfigMethod, $globalPermission, false) + $cachedValues;
}
return $cachedValues;
}
// If a member doesn't have a certain permission then they can't edit anything
if(!$memberID || ($globalPermission && !Permission::checkMember($memberID, $globalPermission))) {
return $result;
@ -1095,80 +1126,73 @@ class SiteTree extends DataObject implements PermissionProvider,i18nEntityProvid
$SQL_idList = implode($ids, ", ");
// if page can't be viewed, don't grant edit permissions
// to do - implement can_view_multiple(), so this can be enabled
//$ids = array_keys(array_filter(self::can_view_multiple($ids, $memberID)));
// Get the groups that the given member belongs to
$groupIDs = DataObject::get_by_id('Member', $memberID)->Groups()->column("ID");
$SQL_groupList = implode(", ", $groupIDs);
if (!$SQL_groupList) $SQL_groupList = '0';
$combinedStageResult = array();
switch ($stage) {
case 'Live':
$table = 'SiteTree_Live';
break;
default:
user_error('Invalid stage passed to batch_permission_check_stage()', E_USER_WARNING);
case 'Stage':
$table = 'SiteTree';
}
foreach(array('Stage', 'Live') as $stage) {
// Start by filling the array with the pages that actually exist
$table = ($stage=='Stage') ? "SiteTree" : "SiteTree_$stage";
$result = array_fill_keys(
($ids) ? DB::query("SELECT \"ID\" FROM \"$table\" WHERE \"ID\" IN (".implode(", ", $ids).")")->column() : array(),
false
);
// Get the uninherited permissions
$uninheritedPermissions = Versioned::get_by_stage("SiteTree", $stage)
->where("(\"$typeField\" = 'LoggedInUsers' OR
(\"$typeField\" = 'OnlyTheseUsers' AND \"$groupJoinTable\".\"SiteTreeID\" IS NOT NULL))
AND \"SiteTree\".\"ID\" IN ($SQL_idList)")
->leftJoin($groupJoinTable, "\"$groupJoinTable\".\"SiteTreeID\" = \"SiteTree\".\"ID\" AND \"$groupJoinTable\".\"GroupID\" IN ($SQL_groupList)");
if($uninheritedPermissions) {
// Set all the relevant items in $result to true
$result = array_fill_keys($uninheritedPermissions->column('ID'), true) + $result;
// Start by filling the array with the pages that actually exist
$result = array_fill_keys(
($ids) ? DB::query("SELECT \"ID\" FROM \"$table\" WHERE \"ID\" IN (".implode(", ", $ids).")")->column() : array(),
false
);
// Get the uninherited permissions
$uninheritedPermissions = Versioned::get_by_stage("SiteTree", $stage)
->where("(\"$typeField\" = 'LoggedInUsers' OR
(\"$typeField\" = 'OnlyTheseUsers' AND \"$groupJoinTable\".\"SiteTreeID\" IS NOT NULL))
AND \"SiteTree\".\"ID\" IN ($SQL_idList)")
->leftJoin($groupJoinTable, "\"$groupJoinTable\".\"SiteTreeID\" = \"SiteTree\".\"ID\" AND \"$groupJoinTable\".\"GroupID\" IN ($SQL_groupList)");
if($uninheritedPermissions) {
// Set all the relevant items in $result to true
$result = array_fill_keys($uninheritedPermissions->column('ID'), true) + $result;
}
// Get permissions that are inherited
$potentiallyInherited = Versioned::get_by_stage("SiteTree", $stage, "\"$typeField\" = 'Inherit'
AND \"SiteTree\".\"ID\" IN ($SQL_idList)");
if($potentiallyInherited) {
// Group $potentiallyInherited by ParentID; we'll look at the permission of all those
// parents and then see which ones the user has permission on
$groupedByParent = array();
foreach($potentiallyInherited as $item) {
if($item->ParentID) {
if(!isset($groupedByParent[$item->ParentID])) $groupedByParent[$item->ParentID] = array();
$groupedByParent[$item->ParentID][] = $item->ID;
} else {
// Might return different site config based on record context, e.g. when subsites module is used
$siteConfig = $item->getSiteConfig();
$result[$item->ID] = $siteConfig->{$siteConfigMethod}($memberID);
}
}
// Get permissions that are inherited
$potentiallyInherited = Versioned::get_by_stage("SiteTree", $stage, "\"$typeField\" = 'Inherit'
AND \"SiteTree\".\"ID\" IN ($SQL_idList)");
if($potentiallyInherited) {
// Group $potentiallyInherited by ParentID; we'll look at the permission of all those
// parents and then see which ones the user has permission on
$groupedByParent = array();
foreach($potentiallyInherited as $item) {
if($item->ParentID) {
if(!isset($groupedByParent[$item->ParentID])) $groupedByParent[$item->ParentID] = array();
$groupedByParent[$item->ParentID][] = $item->ID;
} else {
// Might return different site config based on record context, e.g. when subsites module is used
$siteConfig = $item->getSiteConfig();
$result[$item->ID] = $siteConfig->{$siteConfigMethod}($memberID);
}
}
if($groupedByParent) {
$actuallyInherited = self::batch_permission_check(array_keys($groupedByParent), $memberID, $typeField, $groupJoinTable, $siteConfigMethod);
if($actuallyInherited) {
$parentIDs = array_keys(array_filter($actuallyInherited));
foreach($parentIDs as $parentID) {
// Set all the relevant items in $result to true
$result = array_fill_keys($groupedByParent[$parentID], true) + $result;
}
if($groupedByParent) {
$actuallyInherited = self::batch_permission_check_stage(array_keys($groupedByParent), $memberID, $typeField, $groupJoinTable, $siteConfigMethod, null, $stage);
if($actuallyInherited) {
$parentIDs = array_keys(array_filter($actuallyInherited));
foreach($parentIDs as $parentID) {
// Set all the relevant items in $result to true
$result = array_fill_keys($groupedByParent[$parentID], true) + $result;
}
}
}
$combinedStageResult = $combinedStageResult + $result;
}
}
if(isset($combinedStageResult)) {
// Cache the results
if(empty(self::$cache_permissions[$cacheKey])) self::$cache_permissions[$cacheKey] = array();
self::$cache_permissions[$cacheKey] = $combinedStageResult + self::$cache_permissions[$cacheKey];
return $combinedStageResult;
if (isset($result)) {
return $result;
} else {
return array();
}

39
tests/model/SiteTreePermissionsTest.php
View File

@ -430,5 +430,44 @@ class SiteTreePermissionsTest extends FunctionalTest {
$this->session()->inst_set('loggedInAs', $user->ID);
$this->assertFalse($page->canEdit($user), 'Website user can\'t edit a page when set to inherit from the SiteConfig, and SiteConfig has canEdit set to OnlyTheseUsers');
}
public function testInfiniteRecursionBug() {
// Create three SiteTree objects
$page1 = new SiteTree();
$page1->write();
$page1->publish("Stage", "Live");
$page2 = new SiteTree();
$page2->ParentID = $page1->ID;
$page2->write();
$page2->publish("Stage", "Live");
$page3 = new SiteTree();
$page3->ParentID = $page2->ID;
$page3->write();
$page3->publish("Stage", "Live");
// Current Heirachechy
// Page 1 -> Page 2 -> Page 3
// Now lets re-arrange the state of staging to cause the loop
$page3->ParentID = $page1->ID;
$page3->write();
// Note that we write page3 before page2, otherwise we would cause a 'normal' infinite loop
$page2->ParentID = $page3->ID;
$page2->write();
// New Heirachy (of staging)
// Page1 -> Page 3 -> Page 2
// Now, if we can check the edit permission of page3 and page2, the bug is fixed
$user = $this->objFromFixture('Member', 'subadmin');
$this->session()->inst_set('loggedInAs', $user->ID);
$this->assertTrue($page3->canEdit($user));
$this->assertTrue($page2->canEdit($user));
}
}