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silverstripe-framework/model/versioning/Versioned.php
Damian Mooyman 0848aca462 API Massive refactor of Versioned 
API Implemented recursive versioned actions (publish, etc)
API Un-deprecate delete batch action
API Changed Versioned getters and setters for stages
BUG Inject query parameters during DataObject construction to prevent incorrect lazy loading
2016-03-17 13:43:53 +13:00

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<?php
// namespace SilverStripe\Framework\Model\Versioning
/**
* The Versioned extension allows your DataObjects to have several versions,
* allowing you to rollback changes and view history. An example of this is
* the pages used in the CMS.
*
* @property int $Version
* @property DataObject|Versioned $owner
*
* @package framework
* @subpackage model
*/
class Versioned extends DataExtension implements TemplateGlobalProvider {
/**
* Versioning mode for this object.
* Note: Not related to the current versioning mode in the state / session
* Will be one of 'StagedVersioned' or 'Versioned';
*
* @var string
*/
protected $mode;
/**
* The default reading mode
*/
const DEFAULT_MODE = 'Stage.Live';
/**
* Constructor arg to specify that staging is active on this record.
* 'Staging' implies that 'Versioning' is also enabled.
*/
const STAGEDVERSIONED = 'StagedVersioned';
/**
* Constructor arg to specify that versioning only is active on this record.
*/
const VERSIONED = 'Versioned';
/**
* The Public stage.
*/
const LIVE = 'Live';
/**
* The draft (default) stage
*/
const DRAFT = 'Stage';
/**
* A version that a DataObject should be when it is 'migrating',
* that is, when it is in the process of moving from one stage to another.
* @var string
*/
public $migratingVersion;
/**
* A cache used by get_versionnumber_by_stage().
* Clear through {@link flushCache()}.
*
* @var array
*/
protected static $cache_versionnumber;
/**
* Current reading mode
*
* @var string
*/
protected static $reading_mode = null;
/**
* @var Boolean Flag which is temporarily changed during the write() process
* to influence augmentWrite() behaviour. If set to TRUE, no new version will be created
* for the following write. Needs to be public as other classes introspect this state
* during the write process in order to adapt to this versioning behaviour.
*/
public $_nextWriteWithoutVersion = false;
/**
* Additional database columns for the new
* "_versions" table. Used in {@link augmentDatabase()}
* and all Versioned calls extending or creating
* SELECT statements.
*
* @var array $db_for_versions_table
*/
private static $db_for_versions_table = array(
"RecordID" => "Int",
"Version" => "Int",
"WasPublished" => "Boolean",
"AuthorID" => "Int",
"PublisherID" => "Int"
);
/**
* @var array
*/
private static $db = array(
'Version' => 'Int'
);
/**
* Used to enable or disable the prepopulation of the version number cache.
* Defaults to true.
*
* @config
* @var boolean
*/
private static $prepopulate_versionnumber_cache = true;
/**
* Keep track of the archive tables that have been created.
*
* @config
* @var array
*/
private static $archive_tables = array();
/**
* Additional database indexes for the new
* "_versions" table. Used in {@link augmentDatabase()}.
*
* @var array $indexes_for_versions_table
*/
private static $indexes_for_versions_table = array(
'RecordID_Version' => '("RecordID","Version")',
'RecordID' => true,
'Version' => true,
'AuthorID' => true,
'PublisherID' => true,
);
/**
* An array of DataObject extensions that may require versioning for extra tables
* The array value is a set of suffixes to form these table names, assuming a preceding '_'.
* E.g. if Extension1 creates a new table 'Class_suffix1'
* and Extension2 the tables 'Class_suffix2' and 'Class_suffix3':
*
* $versionableExtensions = array(
* 'Extension1' => 'suffix1',
* 'Extension2' => array('suffix2', 'suffix3'),
* );
*
* This can also be manipulated by updating the current loaded config
*
* SiteTree:
* versionableExtensions:
* - Extension1:
* - suffix1
* - suffix2
* - Extension2:
* - suffix1
* - suffix2
*
* or programatically:
*
* Config::inst()->update($this->owner->class, 'versionableExtensions',
* array('Extension1' => 'suffix1', 'Extension2' => array('suffix2', 'suffix3')));
*
*
* Make sure your extension has a static $enabled-property that determines if it is
* processed by Versioned.
*
* @config
* @var array
*/
private static $versionableExtensions = array('Translatable' => 'lang');
/**
* Permissions necessary to view records outside of the live stage (e.g. archive / draft stage).
*
* @config
* @var array
*/
private static $non_live_permissions = array('CMS_ACCESS_LeftAndMain', 'CMS_ACCESS_CMSMain', 'VIEW_DRAFT_CONTENT');
/**
* List of relationships on this object that are "owned" by this object.
* Owership in the context of versioned objects is a relationship where
* the publishing of owning objects requires the publishing of owned objects.
*
* E.g. A page owns a set of banners, as in order for the page to be published, all
* banners on this page must also be published for it to be visible.
*
* Typically any object and its owned objects should be visible in the same edit view.
* E.g. a page and {@see GridField} of banners.
*
* Page hierarchy is typically not considered an ownership relationship.
*
* Ownership is recursive; If A owns B and B owns C then A owns C.
*
* @config
* @var array List of has_many or many_many relationships owned by this object.
*/
private static $owns = array();
/**
* Opposing relationship to owns config; Represents the objects which
* own the current object.
*
* @var array
*/
private static $owned_by = array();
/**
* Reset static configuration variables to their default values.
*/
public static function reset() {
self::$reading_mode = '';
Session::clear('readingMode');
}
/**
* Amend freshly created DataQuery objects with versioned-specific
* information.
*
* @param SQLSelect
* @param DataQuery
*/
public function augmentDataQueryCreation(SQLSelect &$query, DataQuery &$dataQuery) {
$parts = explode('.', Versioned::get_reading_mode());
if($parts[0] == 'Archive') {
$dataQuery->setQueryParam('Versioned.mode', 'archive');
$dataQuery->setQueryParam('Versioned.date', $parts[1]);
} else if($parts[0] == 'Stage' && $this->hasStages()) {
$dataQuery->setQueryParam('Versioned.mode', 'stage');
$dataQuery->setQueryParam('Versioned.stage', $parts[1]);
}
}
/**
* Construct a new Versioned object.
*
* @var string $mode One of "StagedVersioned" or "Versioned".
*/
public function __construct($mode = self::STAGEDVERSIONED) {
parent::__construct();
// Handle deprecated behaviour
if($mode === 'Stage' && func_num_args() === 1) {
Deprecation::notice("5.0", "Versioned now takes a mode as a single parameter");
$mode = static::VERSIONED;
} elseif(is_array($mode) || func_num_args() > 1) {
Deprecation::notice("5.0", "Versioned now takes a mode as a single parameter");
$mode = func_num_args() > 1 || count($mode) > 1
? static::STAGEDVERSIONED
: static::VERSIONED;
}
if(!in_array($mode, array(static::STAGEDVERSIONED, static::VERSIONED))) {
throw new InvalidArgumentException("Invalid mode: {$mode}");
}
$this->mode = $mode;
}
/**
* Cache of version to modified dates for this objects
*
* @var array
*/
protected $versionModifiedCache = array();
/**
* Get modified date for the given version
*
* @param int $version
* @return string
*/
protected function getLastEditedForVersion($version) {
// Cache key
$baseTable = ClassInfo::baseDataClass($this->owner);
$id = $this->owner->ID;
$key = "{$baseTable}#{$id}/{$version}";
// Check cache
if(isset($this->versionModifiedCache[$key])) {
return $this->versionModifiedCache[$key];
}
// Build query
$table = "\"{$baseTable}_versions\"";
$query = SQLSelect::create('"LastEdited"', $table)
->addWhere([
"{$table}.\"RecordID\"" => $id,
"{$table}.\"Version\"" => $version
]);
$date = $query->execute()->value();
if($date) {
$this->versionModifiedCache[$key] = $date;
}
return $date;
}
public function updateInheritableQueryParams(&$params) {
// Skip if versioned isn't set
if(!isset($params['Versioned.mode'])) {
return;
}
// Adjust query based on original selection criterea
$owner = $this->owner;
switch($params['Versioned.mode']) {
case 'all_versions': {
// Versioned.mode === all_versions doesn't inherit very well, so default to stage
$params['Versioned.mode'] = 'stage';
$params['Versioned.stage'] = static::DRAFT;
break;
}
case 'version': {
// If we selected this object from a specific version, we need
// to find the date this version was published, and ensure
// inherited queries select from that date.
$version = $params['Versioned.version'];
$date = $this->getLastEditedForVersion($version);
// Filter related objects at the same date as this version
unset($params['Versioned.version']);
if($date) {
$params['Versioned.mode'] = 'archive';
$params['Versioned.date'] = $date;
} else {
// Fallback to default
$params['Versioned.mode'] = 'stage';
$params['Versioned.stage'] = static::DRAFT;
}
break;
}
}
}
/**
* Augment the the SQLSelect that is created by the DataQuery
*
* See {@see augmentLazyLoadFields} for lazy-loading applied prior to this.
*
* @param SQLSelect $query
* @param DataQuery $dataQuery
* @throws InvalidArgumentException
*/
public function augmentSQL(SQLSelect $query, DataQuery $dataQuery = null) {
if(!$dataQuery || !$dataQuery->getQueryParam('Versioned.mode')) {
return;
}
$baseTable = ClassInfo::baseDataClass($dataQuery->dataClass());
$versionedMode = $dataQuery->getQueryParam('Versioned.mode');
switch($versionedMode) {
// Reading a specific stage (Stage or Live)
case 'stage':
// Check if we need to rewrite this table
$stage = $dataQuery->getQueryParam('Versioned.stage');
if(!$this->hasStages() || $stage === static::DRAFT) {
break;
}
// Rewrite all tables to select from the live version
foreach($query->getFrom() as $table => $dummy) {
if(!$this->isTableVersioned($table)) {
continue;
}
$stageTable = $this->stageTable($table, $stage);
$query->renameTable($table, $stageTable);
}
break;
// Reading a specific stage, but only return items that aren't in any other stage
case 'stage_unique':
if(!$this->hasStages()) {
break;
}
$stage = $dataQuery->getQueryParam('Versioned.stage');
// Recurse to do the default stage behavior (must be first, we rely on stage renaming happening before
// below)
$dataQuery->setQueryParam('Versioned.mode', 'stage');
$this->augmentSQL($query, $dataQuery);
$dataQuery->setQueryParam('Versioned.mode', 'stage_unique');
// Now exclude any ID from any other stage. Note that we double rename to avoid the regular stage rename
// renaming all subquery references to be Versioned.stage
foreach([static::DRAFT, static::LIVE] as $excluding) {
if ($excluding == $stage) {
continue;
}
$tempName = 'ExclusionarySource_'.$excluding;
$excludingTable = $baseTable . ($excluding && $excluding != static::DRAFT ? "_$excluding" : '');
$query->addWhere('"'.$baseTable.'"."ID" NOT IN (SELECT "ID" FROM "'.$tempName.'")');
$query->renameTable($tempName, $excludingTable);
}
break;
// Return all version instances
case 'archive':
case 'all_versions':
case 'latest_versions':
case 'version':
foreach($query->getFrom() as $alias => $join) {
if(!$this->isTableVersioned($alias)) {
continue;
}
if($alias != $baseTable) {
// Make sure join includes version as well
$query->setJoinFilter(
$alias,
"\"{$alias}_versions\".\"RecordID\" = \"{$baseTable}_versions\".\"RecordID\""
. " AND \"{$alias}_versions\".\"Version\" = \"{$baseTable}_versions\".\"Version\""
);
}
$query->renameTable($alias, $alias . '_versions');
}
// Add all <basetable>_versions columns
foreach(Config::inst()->get('Versioned', 'db_for_versions_table') as $name => $type) {
$query->selectField(sprintf('"%s_versions"."%s"', $baseTable, $name), $name);
}
// Alias the record ID as the row ID, and ensure ID filters are aliased correctly
$query->selectField("\"{$baseTable}_versions\".\"RecordID\"", "ID");
$query->replaceText("\"{$baseTable}_versions\".\"ID\"", "\"{$baseTable}_versions\".\"RecordID\"");
// However, if doing count, undo rewrite of "ID" column
$query->replaceText(
"count(DISTINCT \"{$baseTable}_versions\".\"RecordID\")",
"count(DISTINCT \"{$baseTable}_versions\".\"ID\")"
);
// Add additional versioning filters
switch($versionedMode) {
case 'archive': {
$date = $dataQuery->getQueryParam('Versioned.date');
if(!$date) {
throw new InvalidArgumentException("Invalid archive date");
}
// Link to the version archived on that date
$query->addWhere([
"\"{$baseTable}_versions\".\"Version\" IN
(SELECT LatestVersion FROM
(SELECT
\"{$baseTable}_versions\".\"RecordID\",
MAX(\"{$baseTable}_versions\".\"Version\") AS LatestVersion
FROM \"{$baseTable}_versions\"
WHERE \"{$baseTable}_versions\".\"LastEdited\" <= ?
GROUP BY \"{$baseTable}_versions\".\"RecordID\"
) AS \"{$baseTable}_versions_latest\"
WHERE \"{$baseTable}_versions_latest\".\"RecordID\" = \"{$baseTable}_versions\".\"RecordID\"
)" => $date
]);
break;
}
case 'latest_versions': {
// Return latest version instances, regardless of whether they are on a particular stage
// This provides "show all, including deleted" functonality
$query->addWhere(
"\"{$baseTable}_versions\".\"Version\" IN
(SELECT LatestVersion FROM
(SELECT
\"{$baseTable}_versions\".\"RecordID\",
MAX(\"{$baseTable}_versions\".\"Version\") AS LatestVersion
FROM \"{$baseTable}_versions\"
GROUP BY \"{$baseTable}_versions\".\"RecordID\"
) AS \"{$baseTable}_versions_latest\"
WHERE \"{$baseTable}_versions_latest\".\"RecordID\" = \"{$baseTable}_versions\".\"RecordID\"
)"
);
break;
}
case 'version': {
// If selecting a specific version, filter it here
$version = $dataQuery->getQueryParam('Versioned.version');
if(!$version) {
throw new InvalidArgumentException("Invalid version");
}
$query->addWhere([
"\"{$baseTable}_versions\".\"Version\"" => $version
]);
break;
}
default: {
// If all versions are requested, ensure that records are sorted by this field
$query->addOrderBy(sprintf('"%s_versions"."%s"', $baseTable, 'Version'));
break;
}
}
break;
default:
throw new InvalidArgumentException("Bad value for query parameter Versioned.mode: "
. $dataQuery->getQueryParam('Versioned.mode'));
}
}
/**
* Determine if the given versioned table is a part of the sub-tree of the current dataobject
* This helps prevent rewriting of other tables that get joined in, in particular, many_many tables
*
* @param string $table
* @return bool True if this table should be versioned
*/
protected function isTableVersioned($table) {
if(!class_exists($table)) {
return false;
}
$baseClass = ClassInfo::baseDataClass($this->owner);
return is_a($table, $baseClass, true);
}
/**
* For lazy loaded fields requiring extra sql manipulation, ie versioning.
*
* @param SQLSelect $query
* @param DataQuery $dataQuery
* @param DataObject $dataObject
*/
public function augmentLoadLazyFields(SQLSelect &$query, DataQuery &$dataQuery = null, $dataObject) {
// The VersionedMode local variable ensures that this decorator only applies to
// queries that have originated from the Versioned object, and have the Versioned
// metadata set on the query object. This prevents regular queries from
// accidentally querying the *_versions tables.
$versionedMode = $dataObject->getSourceQueryParam('Versioned.mode');
$dataClass = ClassInfo::baseDataClass($dataQuery->dataClass());
$modesToAllowVersioning = array('all_versions', 'latest_versions', 'archive', 'version');
if(
!empty($dataObject->Version) &&
(!empty($versionedMode) && in_array($versionedMode,$modesToAllowVersioning))
) {
// This will ensure that augmentSQL will select only the same version as the owner,
// regardless of how this object was initially selected
$dataQuery->where([
"\"$dataClass\".\"Version\"" => $dataObject->Version
]);
$dataQuery->setQueryParam('Versioned.mode', 'all_versions');
}
}
/**
* Called by {@link SapphireTest} when the database is reset.
*
* @todo Reduce the coupling between this and SapphireTest, somehow.
*/
public static function on_db_reset() {
// Drop all temporary tables
$db = DB::get_conn();
foreach(static::$archive_tables as $tableName) {
if(method_exists($db, 'dropTable')) $db->dropTable($tableName);
else $db->query("DROP TABLE \"$tableName\"");
}
// Remove references to them
static::$archive_tables = array();
}
public function augmentDatabase() {
$owner = $this->owner;
$classTable = $owner->class;
$isRootClass = ($owner->class == ClassInfo::baseDataClass($owner->class));
// Build a list of suffixes whose tables need versioning
$allSuffixes = array();
$versionableExtensions = $owner->config()->versionableExtensions;
if(count($versionableExtensions)){
foreach ($versionableExtensions as $versionableExtension => $suffixes) {
if ($owner->hasExtension($versionableExtension)) {
$allSuffixes = array_merge($allSuffixes, (array)$suffixes);
foreach ((array)$suffixes as $suffix) {
$allSuffixes[$suffix] = $versionableExtension;
}
}
}
}
// Add the default table with an empty suffix to the list (table name = class name)
array_push($allSuffixes,'');
foreach ($allSuffixes as $key => $suffix) {
// check that this is a valid suffix
if (!is_int($key)) continue;
if ($suffix) $table = "{$classTable}_$suffix";
else $table = $classTable;
$fields = DataObject::database_fields($owner->class);
unset($fields['ID']);
if($fields) {
$options = Config::inst()->get($owner->class, 'create_table_options', Config::FIRST_SET);
$indexes = $owner->databaseIndexes();
if ($suffix && ($ext = $owner->getExtensionInstance($allSuffixes[$suffix]))) {
if (!$ext->isVersionedTable($table)) continue;
$ext->setOwner($owner);
$fields = $ext->fieldsInExtraTables($suffix);
$ext->clearOwner();
$indexes = $fields['indexes'];
$fields = $fields['db'];
}
// Create tables for other stages
if($this->hasStages()) {
// Extra tables for _Live, etc.
// Change unique indexes to 'index'. Versioned tables may run into unique indexing difficulties
// otherwise.
$liveTable = $this->stageTable($table, static::LIVE);
$indexes = $this->uniqueToIndex($indexes);
DB::require_table($liveTable, $fields, $indexes, false, $options);
}
if($isRootClass) {
// Create table for all versions
$versionFields = array_merge(
Config::inst()->get('Versioned', 'db_for_versions_table'),
(array)$fields
);
$versionIndexes = array_merge(
Config::inst()->get('Versioned', 'indexes_for_versions_table'),
(array)$indexes
);
} else {
// Create fields for any tables of subclasses
$versionFields = array_merge(
array(
"RecordID" => "Int",
"Version" => "Int",
),
(array)$fields
);
//Unique indexes will not work on versioned tables, so we'll convert them to standard indexes:
$indexes = $this->uniqueToIndex($indexes);
$versionIndexes = array_merge(
array(
'RecordID_Version' => array('type' => 'unique', 'value' => '"RecordID","Version"'),
'RecordID' => true,
'Version' => true,
),
(array)$indexes
);
}
if(DB::get_schema()->hasTable("{$table}_versions")) {
// Fix data that lacks the uniqueness constraint (since this was added later and
// bugs meant that the constraint was validated)
$duplications = DB::query("SELECT MIN(\"ID\") AS \"ID\", \"RecordID\", \"Version\"
FROM \"{$table}_versions\" GROUP BY \"RecordID\", \"Version\"
HAVING COUNT(*) > 1");
foreach($duplications as $dup) {
DB::alteration_message("Removing {$table}_versions duplicate data for "
."{$dup['RecordID']}/{$dup['Version']}" ,"deleted");
DB::prepared_query(
"DELETE FROM \"{$table}_versions\" WHERE \"RecordID\" = ?
AND \"Version\" = ? AND \"ID\" != ?",
array($dup['RecordID'], $dup['Version'], $dup['ID'])
);
}
// Remove junk which has no data in parent classes. Only needs to run the following
// when versioned data is spread over multiple tables
if(!$isRootClass && ($versionedTables = ClassInfo::dataClassesFor($table))) {
foreach($versionedTables as $child) {
if($table === $child) break; // only need subclasses
// Select all orphaned version records
$orphanedQuery = SQLSelect::create()
->selectField("\"{$table}_versions\".\"ID\"")
->setFrom("\"{$table}_versions\"");
// If we have a parent table limit orphaned records
// to only those that exist in this
if(DB::get_schema()->hasTable("{$child}_versions")) {
$orphanedQuery
->addLeftJoin(
"{$child}_versions",
"\"{$child}_versions\".\"RecordID\" = \"{$table}_versions\".\"RecordID\"
AND \"{$child}_versions\".\"Version\" = \"{$table}_versions\".\"Version\""
)
->addWhere("\"{$child}_versions\".\"ID\" IS NULL");
}
$count = $orphanedQuery->count();
if($count > 0) {
DB::alteration_message("Removing {$count} orphaned versioned records", "deleted");
$ids = $orphanedQuery->execute()->column();
foreach($ids as $id) {
DB::prepared_query(
"DELETE FROM \"{$table}_versions\" WHERE \"ID\" = ?",
array($id)
);
}
}
}
}
}
DB::require_table("{$table}_versions", $versionFields, $versionIndexes, true, $options);
} else {
DB::dont_require_table("{$table}_versions");
if($this->hasStages()) {
$liveTable = $this->stageTable($table, static::LIVE);
DB::dont_require_table($liveTable);
}
}
}
}
/**
* Helper for augmentDatabase() to find unique indexes and convert them to non-unique
*
* @param array $indexes The indexes to convert
* @return array $indexes
*/
private function uniqueToIndex($indexes) {
$unique_regex = '/unique/i';
$results = array();
foreach ($indexes as $key => $index) {
$results[$key] = $index;
// support string descriptors
if (is_string($index)) {
if (preg_match($unique_regex, $index)) {
$results[$key] = preg_replace($unique_regex, 'index', $index);
}
}
// canonical, array-based descriptors
elseif (is_array($index)) {
if (strtolower($index['type']) == 'unique') {
$results[$key]['type'] = 'index';
}
}
}
return $results;
}
/**
* Generates a ($table)_version DB manipulation and injects it into the current $manipulation
*
* @param array $manipulation Source manipulation data
* @param string $table Name of table
* @param int $recordID ID of record to version
*/
protected function augmentWriteVersioned(&$manipulation, $table, $recordID) {
$baseDataClass = ClassInfo::baseDataClass($table);
// Set up a new entry in (table)_versions
$newManipulation = array(
"command" => "insert",
"fields" => isset($manipulation[$table]['fields']) ? $manipulation[$table]['fields'] : null
);
// Add any extra, unchanged fields to the version record.
$data = DB::prepared_query("SELECT * FROM \"$table\" WHERE \"ID\" = ?", array($recordID))->record();
if ($data) {
$fields = DataObject::database_fields($table);
if (is_array($fields)) {
$data = array_intersect_key($data, $fields);
foreach ($data as $k => $v) {
if (!isset($newManipulation['fields'][$k])) {
$newManipulation['fields'][$k] = $v;
}
}
}
}
// Ensure that the ID is instead written to the RecordID field
$newManipulation['fields']['RecordID'] = $recordID;
unset($newManipulation['fields']['ID']);
// Generate next version ID to use
$nextVersion = 0;
if($recordID) {
$nextVersion = DB::prepared_query("SELECT MAX(\"Version\") + 1
FROM \"{$baseDataClass}_versions\" WHERE \"RecordID\" = ?",
array($recordID)
)->value();
}
$nextVersion = $nextVersion ?: 1;
if($table === $baseDataClass) {
// Write AuthorID for baseclass
$userID = (Member::currentUser()) ? Member::currentUser()->ID : 0;
$newManipulation['fields']['AuthorID'] = $userID;
// Update main table version if not previously known
$manipulation[$table]['fields']['Version'] = $nextVersion;
}
// Update _versions table manipulation
$newManipulation['fields']['Version'] = $nextVersion;
$manipulation["{$table}_versions"] = $newManipulation;
}
/**
* Rewrite the given manipulation to update the selected (non-default) stage
*
* @param array $manipulation Source manipulation data
* @param string $table Name of table
* @param int $recordID ID of record to version
*/
protected function augmentWriteStaged(&$manipulation, $table, $recordID) {
// If the record has already been inserted in the (table), get rid of it.
if($manipulation[$table]['command'] == 'insert') {
DB::prepared_query(
"DELETE FROM \"{$table}\" WHERE \"ID\" = ?",
array($recordID)
);
}
$newTable = $this->stageTable($table, Versioned::get_stage());
$manipulation[$newTable] = $manipulation[$table];
unset($manipulation[$table]);
}
public function augmentWrite(&$manipulation) {
// get Version number from base data table on write
$version = null;
$owner = $this->owner;
$baseDataClass = ClassInfo::baseDataClass($owner->class);
if(isset($manipulation[$baseDataClass]['fields'])) {
if ($this->migratingVersion) {
$manipulation[$baseDataClass]['fields']['Version'] = $this->migratingVersion;
}
if (isset($manipulation[$baseDataClass]['fields']['Version'])) {
$version = $manipulation[$baseDataClass]['fields']['Version'];
}
}
// Update all tables
$tables = array_keys($manipulation);
foreach($tables as $table) {
// Make sure that the augmented write is being applied to a table that can be versioned
if( !$this->canBeVersioned($table) ) {
unset($manipulation[$table]);
continue;
}
// Get ID field
$id = $manipulation[$table]['id']
? $manipulation[$table]['id']
: $manipulation[$table]['fields']['ID'];
if(!$id) {
user_error("Couldn't find ID in " . var_export($manipulation[$table], true), E_USER_ERROR);
}
if($version < 0 || $this->_nextWriteWithoutVersion) {
// Putting a Version of -1 is a signal to leave the version table alone, despite their being no version
unset($manipulation[$table]['fields']['Version']);
} elseif(empty($version)) {
// If we haven't got a version #, then we're creating a new version.
// Otherwise, we're just copying a version to another table
$this->augmentWriteVersioned($manipulation, $table, $id);
}
// Remove "Version" column from subclasses of baseDataClass
if(!$this->hasVersionField($table)) {
unset($manipulation[$table]['fields']['Version']);
}
// Grab a version number - it should be the same across all tables.
if(isset($manipulation[$table]['fields']['Version'])) {
$thisVersion = $manipulation[$table]['fields']['Version'];
}
// If we're editing Live, then use (table)_Live instead of (table)
if($this->hasStages() && static::get_stage() === static::LIVE) {
$this->augmentWriteStaged($manipulation, $table, $id);
}
}
// Clear the migration flag
if($this->migratingVersion) {
$this->migrateVersion(null);
}
// Add the new version # back into the data object, for accessing
// after this write
if(isset($thisVersion)) {
$owner->Version = str_replace("'","", $thisVersion);
}
}
/**
* Perform a write without affecting the version table.
* On objects without versioning.
*
* @return int The ID of the record
*/
public function writeWithoutVersion() {
$this->_nextWriteWithoutVersion = true;
return $this->owner->write();
}
/**
*
*/
public function onAfterWrite() {
$this->_nextWriteWithoutVersion = false;
}
/**
* If a write was skipped, then we need to ensure that we don't leave a
* migrateVersion() value lying around for the next write.
*/
public function onAfterSkippedWrite() {
$this->migrateVersion(null);
}
/**
* Find all objects owned by the current object.
* Note that objects will only be searched in the same stage as the given record.
*
* @param bool $recursive True if recursive
* @param ArrayList $list Optional list to add items to
* @return ArrayList list of objects
*/
public function findOwned($recursive = true, $list = null)
{
// Find objects in these relationships
return $this->findRelatedObjects('owns', $recursive, $list);
}
/**
* Find objects which own this object.
* Note that objects will only be searched in the same stage as the given record.
*
* @param bool $recursive True if recursive
* @param ArrayList $list Optional list to add items to
* @return ArrayList list of objects
*/
public function findOwners($recursive = true, $list = null)
{
// Find objects in these relationships
return $this->findRelatedObjects('owned_by', $recursive, $list);
}
/**
* Find objects in the given relationships, merging them into the given list
*
* @param array $source Config property to extract relationships from
* @param bool $recursive True if recursive
* @param ArrayList $list Optional list to add items to
* @return ArrayList The list
*/
public function findRelatedObjects($source, $recursive = true, $list = null)
{
if (!$list) {
$list = new ArrayList();
}
// Skip search for unsaved records
$owner = $this->owner;
if(!$owner->isInDB()) {
return $list;
}
$relationships = $owner->config()->{$source};
foreach($relationships as $relationship) {
// Warn if invalid config
if(!$owner->hasMethod($relationship)) {
trigger_error(sprintf(
"Invalid %s config value \"%s\" on object on class \"%s\"",
$source,
$relationship,
$owner->class
), E_USER_WARNING);
continue;
}
// Inspect value of this relationship
$items = $owner->{$relationship}();
if(!$items) {
continue;
}
if($items instanceof DataObject) {
$items = array($items);
}
/** @var Versioned|DataObject $item */
foreach($items as $item) {
// Identify item
$itemKey = $item->class . '/' . $item->ID;
// Skip unsaved, unversioned, or already checked objects
if(!$item->isInDB() || !$item->has_extension('Versioned') || isset($list[$itemKey])) {
continue;
}
// Save record
$list[$itemKey] = $item;
if($recursive) {
$item->findRelatedObjects($source, true, $list);
};
}
}
return $list;
}
/**
* This function should return true if the current user can publish this record.
* It can be overloaded to customise the security model for an application.
*
* Denies permission if any of the following conditions is true:
* - canPublish() on any extension returns false
* - canEdit() returns false
*
* @param Member $member
* @return bool True if the current user can publish this record.
*/
public function canPublish($member = null) {
// Skip if invoked by extendedCan()
if(func_num_args() > 4) {
return null;
}
if(!$member) {
$member = Member::currentUser();
}
if(Permission::checkMember($member, "ADMIN")) {
return true;
}
// Standard mechanism for accepting permission changes from extensions
$owner = $this->owner;
$extended = $owner->extendedCan('canPublish', $member);
if($extended !== null) {
return $extended;
}
// Default to relying on edit permission
return $owner->canEdit($member);
}
/**
* Check if the current user can delete this record from live
*
* @param null $member
* @return mixed
*/
public function canUnpublish($member = null) {
// Skip if invoked by extendedCan()
if(func_num_args() > 4) {
return null;
}
if(!$member) {
$member = Member::currentUser();
}
if(Permission::checkMember($member, "ADMIN")) {
return true;
}
// Standard mechanism for accepting permission changes from extensions
$owner = $this->owner;
$extended = $owner->extendedCan('canUnpublish', $member);
if($extended !== null) {
return $extended;
}
// Default to relying on canPublish
return $owner->canPublish($member);
}
/**
* Check if the current user is allowed to archive this record.
* If extended, ensure that both canDelete and canUnpublish are extended also
*
* @param Member $member
* @return bool
*/
public function canArchive($member = null) {
// Skip if invoked by extendedCan()
if(func_num_args() > 4) {
return null;
}
if(!$member) {
$member = Member::currentUser();
}
if(Permission::checkMember($member, "ADMIN")) {
return true;
}
// Standard mechanism for accepting permission changes from extensions
$owner = $this->owner;
$extended = $owner->extendedCan('canArchive', $member);
if($extended !== null) {
return $extended;
}
// Check if this record can be deleted from stage
if(!$owner->canDelete($member)) {
return false;
}
// Check if we can delete from live
if(!$owner->canUnpublish($member)) {
return false;
}
return true;
}
/**
* Check if the user can revert this record to live
*
* @param Member $member
* @return bool
*/
public function canRevertToLive($member = null) {
$owner = $this->owner;
// Skip if invoked by extendedCan()
if(func_num_args() > 4) {
return null;
}
// Can't revert if not on live
if(!$owner->isPublished()) {
return false;
}
if(!$member) {
$member = Member::currentUser();
}
if(Permission::checkMember($member, "ADMIN")) {
return true;
}
// Standard mechanism for accepting permission changes from extensions
$extended = $owner->extendedCan('canRevertToLive', $member);
if($extended !== null) {
return $extended;
}
// Default to canEdit
return $owner->canEdit($member);
}
/**
* Extend permissions to include additional security for objects that are not published to live.
*
* @param Member $member
* @return bool|null
*/
public function canView($member = null) {
// Invoke default version-gnostic canView
if ($this->owner->canViewVersioned($member) === false) {
return false;
}
}
/**
* Determine if there are any additional restrictions on this object for the given reading version.
*
* Override this in a subclass to customise any additional effect that Versioned applies to canView.
*
* This is expected to be called by canView, and thus is only responsible for denying access if
* the default canView would otherwise ALLOW access. Thus it should not be called in isolation
* as an authoritative permission check.
*
* This has the following extension points:
* - canViewDraft is invoked if Mode = stage and Stage = stage
* - canViewArchived is invoked if Mode = archive
*
* @param Member $member
* @return bool False is returned if the current viewing mode denies visibility
*/
public function canViewVersioned($member = null) {
// Bypass when live stage
$owner = $this->owner;
$mode = $owner->getSourceQueryParam("Versioned.mode");
$stage = $owner->getSourceQueryParam("Versioned.stage");
if ($mode === 'stage' && $stage === static::LIVE) {
return true;
}
// Bypass if site is unsecured
if (Session::get('unsecuredDraftSite')) {
return true;
}
// Bypass if record doesn't have a live stage
if(!$this->hasStages()) {
return true;
}
// If we weren't definitely loaded from live, and we can't view non-live content, we need to
// check to make sure this version is the live version and so can be viewed
$latestVersion = Versioned::get_versionnumber_by_stage($owner->class, static::LIVE, $owner->ID);
if ($latestVersion == $owner->Version) {
// Even if this is loaded from a non-live stage, this is the live version
return true;
}
// Extend versioned behaviour
$extended = $owner->extendedCan('canViewNonLive', $member);
if($extended !== null) {
return (bool)$extended;
}
// Fall back to default permission check
$permissions = Config::inst()->get($owner->class, 'non_live_permissions', Config::FIRST_SET);
$check = Permission::checkMember($member, $permissions);
return (bool)$check;
}
/**
* Determines canView permissions for the latest version of this object on a specific stage.
* Usually the stage is read from {@link Versioned::current_stage()}.
*
* This method should be invoked by user code to check if a record is visible in the given stage.
*
* This method should not be called via ->extend('canViewStage'), but rather should be
* overridden in the extended class.
*
* @param string $stage
* @param Member $member
* @return bool
*/
public function canViewStage($stage = 'Live', $member = null) {
$oldMode = Versioned::get_reading_mode();
Versioned::set_stage($stage);
$owner = $this->owner;
$versionFromStage = DataObject::get($owner->class)->byID($owner->ID);
Versioned::set_reading_mode($oldMode);
return $versionFromStage ? $versionFromStage->canView($member) : false;
}
/**
* Determine if a table is supporting the Versioned extensions (e.g.
* $table_versions does exists).
*
* @param string $table Table name
* @return boolean
*/
public function canBeVersioned($table) {
return ClassInfo::exists($table)
&& is_subclass_of($table, 'DataObject')
&& DataObject::has_own_table($table);
}
/**
* Check if a certain table has the 'Version' field.
*
* @param string $table Table name
*
* @return boolean Returns false if the field isn't in the table, true otherwise
*/
public function hasVersionField($table) {
// Strip "_Live" from end of table
$live = static::LIVE;
if($this->hasStages() && preg_match("/^(?<table>.*)_{$live}$/", $table, $matches)) {
$table = $matches['table'];
}
// Base table has version field
return $table === ClassInfo::baseDataClass($table);
}
/**
* @param string $table
*
* @return string
*/
public function extendWithSuffix($table) {
$owner = $this->owner;
$versionableExtensions = $owner->config()->versionableExtensions;
if(count($versionableExtensions)){
foreach ($versionableExtensions as $versionableExtension => $suffixes) {
if ($owner->hasExtension($versionableExtension)) {
$ext = $owner->getExtensionInstance($versionableExtension);
$ext->setOwner($owner);
$table = $ext->extendWithSuffix($table);
$ext->clearOwner();
}
}
}
return $table;
}
/**
* Get the latest published DataObject.
*
* @return DataObject
*/
public function latestPublished() {
// Get the root data object class - this will have the version field
$owner = $this->owner;
$table1 = ClassInfo::baseDataClass($owner);
$table2 = $this->stageTable($table1, static::LIVE);
return DB::prepared_query("SELECT \"$table1\".\"Version\" = \"$table2\".\"Version\" FROM \"$table1\"
INNER JOIN \"$table2\" ON \"$table1\".\"ID\" = \"$table2\".\"ID\"
WHERE \"$table1\".\"ID\" = ?",
array($owner->ID)
)->value();
}
/**
* Provides a simple doPublish action for Versioned dataobjects
*
* @return bool True if publish was successful
*/
public function doPublish() {
$owner = $this->owner;
if(!$owner->canPublish()) {
return false;
}
$owner->invokeWithExtensions('onBeforePublish');
$owner->write();
$owner->publish(static::DRAFT, static::LIVE);
$owner->invokeWithExtensions('onAfterPublish');
return true;
}
/**
* Trigger publishing of owned objects
*/
public function onAfterPublish() {
$owner = $this->owner;
// Publish owned objects
foreach ($owner->findOwned(false) as $object) {
/** @var Versioned|DataObject $object */
$object->doPublish();
}
// Unlink any objects disowned as a result of this action
// I.e. objects which aren't owned anymore by this record, but are by the old live record
$owner->unlinkDisownedObjects(Versioned::DRAFT, Versioned::LIVE);
}
/**
* Set foreign keys of has_many objects to 0 where those objects were
* disowned as a result of a partial publish / unpublish.
* I.e. this object and its owned objects were recently written to $targetStage,
* but deleted objects were not.
*
* Note that this operation does not create any new Versions
*
* @param string $sourceStage Objects in this stage will not be unlinked.
* @param string $targetStage Objects which exist in this stage but not $sourceStage
* will be unlinked.
*/
public function unlinkDisownedObjects($sourceStage, $targetStage) {
$owner = $this->owner;
// after publishing, objects which used to be owned need to be
// dis-connected from this object (set ForeignKeyID = 0)
$owns = $owner->config()->owns;
$hasMany = $owner->config()->has_many;
if(empty($owns) || empty($hasMany)) {
return;
}
$ownedHasMany = array_intersect($owns, array_keys($hasMany));
foreach($ownedHasMany as $relationship) {
// Find metadata on relationship
$joinClass = $owner->hasManyComponent($relationship);
$joinField = $owner->getRemoteJoinField($relationship, 'has_many', $polymorphic);
$idField = $polymorphic ? "{$joinField}ID" : $joinField;
$joinTable = ClassInfo::table_for_object_field($joinClass, $idField);
// Generate update query which will unlink disowned objects
$targetTable = $this->stageTable($joinTable, $targetStage);
$disowned = new SQLUpdate("\"{$targetTable}\"");
$disowned->assign("\"{$idField}\"", 0);
$disowned->addWhere(array(
"\"{$targetTable}\".\"{$idField}\"" => $owner->ID
));
// Build exclusion list (items to owned objects we need to keep)
$sourceTable = $this->stageTable($joinTable, $sourceStage);
$owned = new SQLSelect("\"{$sourceTable}\".\"ID\"", "\"{$sourceTable}\"");
$owned->addWhere(array(
"\"{$sourceTable}\".\"{$idField}\"" => $owner->ID
));
// Apply class condition if querying on polymorphic has_one
if($polymorphic) {
$disowned->assign("\"{$joinField}Class\"", null);
$disowned->addWhere(array(
"\"{$targetTable}\".\"{$joinField}Class\"" => get_class($owner)
));
$owned->addWhere(array(
"\"{$sourceTable}\".\"{$joinField}Class\"" => get_class($owner)
));
}
// Merge queries and perform unlink
$ownedSQL = $owned->sql($ownedParams);
$disowned->addWhere(array(
"\"{$targetTable}\".\"ID\" NOT IN ({$ownedSQL})" => $ownedParams
));
$owner->extend('updateDisownershipQuery', $disowned, $sourceStage, $targetStage, $relationship);
$disowned->execute();
}
}
/**
* Removes the record from both live and stage
*
* @return bool Success
*/
public function doArchive() {
$owner = $this->owner;
if(!$owner->canArchive()) {
return false;
}
$owner->invokeWithExtensions('onBeforeArchive', $this);
$owner->doUnpublish();
$owner->delete();
$owner->invokeWithExtensions('onAfterArchive', $this);
return true;
}
/**
* Removes this record from the live site
*
* @return bool Flag whether the unpublish was successful
*/
public function doUnpublish() {
$owner = $this->owner;
if(!$owner->canUnpublish()) {
return false;
}
// Skip if this record isn't saved
if(!$owner->isInDB()) {
return false;
}
// Skip if this record isn't on live
if(!$owner->isPublished()) {
return false;
}
$owner->invokeWithExtensions('onBeforeUnpublish');
$origStage = static::get_stage();
static::set_stage(static::LIVE);
// This way our ID won't be unset
$clone = clone $owner;
$clone->delete();
static::set_stage($origStage);
$owner->invokeWithExtensions('onAfterUnpublish');
return true;
}
/**
* Trigger unpublish of owning objects
*/
public function onAfterUnpublish() {
$owner = $this->owner;
// Any objects which owned (and thus relied on the unpublished object) are now unpublished automatically.
foreach ($owner->findOwners(false) as $object) {
/** @var Versioned|DataObject $object */
$object->doUnpublish();
}
}
/**
* Revert the draft changes: replace the draft content with the content on live
*
* @return bool True if the revert was successful
*/
public function doRevertToLive() {
$owner = $this->owner;
if(!$owner->canRevertToLive()) {
return false;
}
$owner->invokeWithExtensions('onBeforeRevertToLive');
$owner->publish("Live", "Stage", false);
$owner->invokeWithExtensions('onAfterRevertToLive');
return true;
}
/**
* Trigger revert of all owned objects to stage
*/
public function onAfterRevertToLive() {
$owner = $this->owner;
/** @var Versioned|DataObject $liveOwner */
$liveOwner = static::get_by_stage(get_class($owner), static::LIVE)
->byID($owner->ID);
// Revert any owned objects from the live stage only
foreach ($liveOwner->findOwned(false) as $object) {
/** @var Versioned|DataObject $object */
$object->doRevertToLive();
}
// Unlink any objects disowned as a result of this action
// I.e. objects which aren't owned anymore by this record, but are by the old draft record
$owner->unlinkDisownedObjects(Versioned::LIVE, Versioned::DRAFT);
}
/**
* Move a database record from one stage to the other.
*
* @param int|string $fromStage Place to copy from. Can be either a stage name or a version number.
* @param string $toStage Place to copy to. Must be a stage name.
* @param bool $createNewVersion Set this to true to create a new version number.
* By default, the existing version number will be copied over.
*/
public function publish($fromStage, $toStage, $createNewVersion = false) {
$owner = $this->owner;
$owner->invokeWithExtensions('onBeforeVersionedPublish', $fromStage, $toStage, $createNewVersion);
$baseClass = ClassInfo::baseDataClass($owner->class);
/** @var Versioned|DataObject $from */
if(is_numeric($fromStage)) {
$from = Versioned::get_version($baseClass, $owner->ID, $fromStage);
} else {
$owner->flushCache();
$from = Versioned::get_one_by_stage($baseClass, $fromStage, array(
"\"{$baseClass}\".\"ID\" = ?" => $owner->ID
));
}
if(!$from) {
throw new InvalidArgumentException("Can't find {$baseClass}#{$owner->ID} in stage {$fromStage}");
}
$from->forceChange();
if($createNewVersion) {
// Clear version to be automatically created on write
$from->Version = null;
} else {
$from->migrateVersion($from->Version);
// Mark this version as having been published at some stage
$publisherID = isset(Member::currentUser()->ID) ? Member::currentUser()->ID : 0;
$extTable = $this->extendWithSuffix($baseClass);
DB::prepared_query("UPDATE \"{$extTable}_versions\"
SET \"WasPublished\" = ?, \"PublisherID\" = ?
WHERE \"RecordID\" = ? AND \"Version\" = ?",
array(1, $publisherID, $from->ID, $from->Version)
);
}
// Change to new stage, write, and revert state
$oldMode = Versioned::get_reading_mode();
Versioned::set_stage($toStage);
// Migrate stage prior to write
$from->setSourceQueryParam('Versioned.mode', 'stage');
$from->setSourceQueryParam('Versioned.stage', $toStage);
$conn = DB::get_conn();
if(method_exists($conn, 'allowPrimaryKeyEditing')) {
$conn->allowPrimaryKeyEditing($baseClass, true);
$from->write();
$conn->allowPrimaryKeyEditing($baseClass, false);
} else {
$from->write();
}
$from->destroy();
Versioned::set_reading_mode($oldMode);
$owner->invokeWithExtensions('onAfterVersionedPublish', $fromStage, $toStage, $createNewVersion);
}
/**
* Set the migrating version.
*
* @param string $version The version.
*/
public function migrateVersion($version) {
$this->migratingVersion = $version;
}
/**
* Compare two stages to see if they're different.
*
* Only checks the version numbers, not the actual content.
*
* @param string $stage1 The first stage to check.
* @param string $stage2
* @return bool
*/
public function stagesDiffer($stage1, $stage2) {
$table1 = $this->baseTable($stage1);
$table2 = $this->baseTable($stage2);
$owner = $this->owner;
if(!is_numeric($owner->ID)) {
return true;
}
// We test for equality - if one of the versions doesn't exist, this
// will be false.
// TODO: DB Abstraction: if statement here:
$stagesAreEqual = DB::prepared_query(
"SELECT CASE WHEN \"$table1\".\"Version\"=\"$table2\".\"Version\" THEN 1 ELSE 0 END
FROM \"$table1\" INNER JOIN \"$table2\" ON \"$table1\".\"ID\" = \"$table2\".\"ID\"
AND \"$table1\".\"ID\" = ?",
array($owner->ID)
)->value();
return !$stagesAreEqual;
}
/**
* @param string $filter
* @param string $sort
* @param string $limit
* @param string $join Deprecated, use leftJoin($table, $joinClause) instead
* @param string $having
* @return ArrayList
*/
public function Versions($filter = "", $sort = "", $limit = "", $join = "", $having = "") {
return $this->allVersions($filter, $sort, $limit, $join, $having);
}
/**
* Return a list of all the versions available.
*
* @param string $filter
* @param string $sort
* @param string $limit
* @param string $join Deprecated, use leftJoin($table, $joinClause) instead
* @param string $having
* @return ArrayList
*/
public function allVersions($filter = "", $sort = "", $limit = "", $join = "", $having = "") {
// Make sure the table names are not postfixed (e.g. _Live)
$oldMode = static::get_reading_mode();
static::set_stage('Stage');
$owner = $this->owner;
$list = DataObject::get(get_class($owner), $filter, $sort, $join, $limit);
if($having) {
$list->having($having);
}
$query = $list->dataQuery()->query();
foreach($query->getFrom() as $table => $tableJoin) {
if(is_string($tableJoin) && $tableJoin[0] == '"') {
$baseTable = str_replace('"','',$tableJoin);
} elseif(is_string($tableJoin) && substr($tableJoin,0,5) != 'INNER') {
$query->setFrom(array(
$table => "LEFT JOIN \"$table\" ON \"$table\".\"RecordID\"=\"{$baseTable}_versions\".\"RecordID\""
. " AND \"$table\".\"Version\" = \"{$baseTable}_versions\".\"Version\""
));
}
$query->renameTable($table, $table . '_versions');
}
// Add all <basetable>_versions columns
foreach(Config::inst()->get('Versioned', 'db_for_versions_table') as $name => $type) {
$query->selectField(sprintf('"%s_versions"."%s"', $baseTable, $name), $name);
}
$query->addWhere(array(
"\"{$baseTable}_versions\".\"RecordID\" = ?" => $owner->ID
));
$query->setOrderBy(($sort) ? $sort
: "\"{$baseTable}_versions\".\"LastEdited\" DESC, \"{$baseTable}_versions\".\"Version\" DESC");
$records = $query->execute();
$versions = new ArrayList();
foreach($records as $record) {
$versions->push(new Versioned_Version($record));
}
Versioned::set_reading_mode($oldMode);
return $versions;
}
/**
* Compare two version, and return the diff between them.
*
* @param string $from The version to compare from.
* @param string $to The version to compare to.
*
* @return DataObject
*/
public function compareVersions($from, $to) {
$owner = $this->owner;
$fromRecord = Versioned::get_version($owner->class, $owner->ID, $from);
$toRecord = Versioned::get_version($owner->class, $owner->ID, $to);
$diff = new DataDifferencer($fromRecord, $toRecord);
return $diff->diffedData();
}
/**
* Return the base table - the class that directly extends DataObject.
*
* @param string $stage
* @return string
*/
public function baseTable($stage = null) {
$baseClass = ClassInfo::baseDataClass($this->owner);
return $this->stageTable($baseClass, $stage);
}
/**
* Given a class and stage determine the table name.
*
* Note: Stages this asset does not exist in will default to the draft table.
*
* @param string $class
* @param string $stage
* @return string Table name
*/
public function stageTable($class, $stage) {
if($this->hasStages() && $stage === static::LIVE) {
return "{$class}_{$stage}";
}
return $class;
}
//-----------------------------------------------------------------------------------------------//
/**
* Determine if the current user is able to set the given site stage / archive
*
* @param SS_HTTPRequest $request
* @return bool
*/
public static function can_choose_site_stage($request) {
// Request is allowed if stage isn't being modified
if((!$request->getVar('stage') || $request->getVar('stage') === static::LIVE)
&& !$request->getVar('archiveDate')
) {
return true;
}
// Check permissions with member ID in session.
$member = Member::currentUser();
$permissions = Config::inst()->get(get_called_class(), 'non_live_permissions');
return $member && Permission::checkMember($member, $permissions);
}
/**
* Choose the stage the site is currently on.
*
* If $_GET['stage'] is set, then it will use that stage, and store it in
* the session.
*
* if $_GET['archiveDate'] is set, it will use that date, and store it in
* the session.
*
* If neither of these are set, it checks the session, otherwise the stage
* is set to 'Live'.
*/
public static function choose_site_stage() {
// Check any pre-existing session mode
$preexistingMode = Session::get('readingMode');
// Determine the reading mode
if(isset($_GET['stage'])) {
$stage = ucfirst(strtolower($_GET['stage']));
if(!in_array($stage, array(static::DRAFT, static::LIVE))) {
$stage = static::LIVE;
}
$mode = 'Stage.' . $stage;
} elseif (isset($_GET['archiveDate']) && strtotime($_GET['archiveDate'])) {
$mode = 'Archive.' . $_GET['archiveDate'];
} elseif($preexistingMode) {
$mode = $preexistingMode;
} else {
$mode = static::DEFAULT_MODE;
}
// Save reading mode
Versioned::set_reading_mode($mode);
// Try not to store the mode in the session if not needed
if(($preexistingMode && $preexistingMode !== $mode)
|| (!$preexistingMode && $mode !== static::DEFAULT_MODE)
) {
Session::set('readingMode', $mode);
}
if(!headers_sent() && !Director::is_cli()) {
if(Versioned::get_stage() == 'Live') {
// clear the cookie if it's set
if(Cookie::get('bypassStaticCache')) {
Cookie::force_expiry('bypassStaticCache', null, null, false, true /* httponly */);
}
} else {
// set the cookie if it's cleared
if(!Cookie::get('bypassStaticCache')) {
Cookie::set('bypassStaticCache', '1', 0, null, null, false, true /* httponly */);
}
}
}
}
/**
* Set the current reading mode.
*
* @param string $mode
*/
public static function set_reading_mode($mode) {
self::$reading_mode = $mode;
}
/**
* Get the current reading mode.
*
* @return string
*/
public static function get_reading_mode() {
return self::$reading_mode;
}
/**
* Get the current reading stage.
*
* @return string
*/
public static function get_stage() {
$parts = explode('.', Versioned::get_reading_mode());
if($parts[0] == 'Stage') {
return $parts[1];
}
}
/**
* Get the current archive date.
*
* @return string
*/
public static function current_archived_date() {
$parts = explode('.', Versioned::get_reading_mode());
if($parts[0] == 'Archive') {
return $parts[1];
}
}
/**
* Set the reading stage.
*
* @param string $stage New reading stage.
*/
public static function set_stage($stage) {
static::set_reading_mode('Stage.' . $stage);
}
/**
* Set the reading archive date.
*
* @param string $date New reading archived date.
*/
public static function reading_archived_date($date) {
Versioned::set_reading_mode('Archive.' . $date);
}
/**
* Get a singleton instance of a class in the given stage.
*
* @param string $class The name of the class.
* @param string $stage The name of the stage.
* @param string $filter A filter to be inserted into the WHERE clause.
* @param boolean $cache Use caching.
* @param string $sort A sort expression to be inserted into the ORDER BY clause.
*
* @return DataObject
*/
public static function get_one_by_stage($class, $stage, $filter = '', $cache = true, $sort = '') {
// TODO: No identity cache operating
$items = static::get_by_stage($class, $stage, $filter, $sort, null, 1);
return $items->First();
}
/**
* Gets the current version number of a specific record.
*
* @param string $class
* @param string $stage
* @param int $id
* @param boolean $cache
*
* @return int
*/
public static function get_versionnumber_by_stage($class, $stage, $id, $cache = true) {
$baseClass = ClassInfo::baseDataClass($class);
$stageTable = ($stage == 'Stage') ? $baseClass : "{$baseClass}_{$stage}";
// cached call
if($cache && isset(self::$cache_versionnumber[$baseClass][$stage][$id])) {
return self::$cache_versionnumber[$baseClass][$stage][$id];
}
// get version as performance-optimized SQL query (gets called for each record in the sitetree)
$version = DB::prepared_query(
"SELECT \"Version\" FROM \"$stageTable\" WHERE \"ID\" = ?",
array($id)
)->value();
// cache value (if required)
if($cache) {
if(!isset(self::$cache_versionnumber[$baseClass])) {
self::$cache_versionnumber[$baseClass] = array();
}
if(!isset(self::$cache_versionnumber[$baseClass][$stage])) {
self::$cache_versionnumber[$baseClass][$stage] = array();
}
self::$cache_versionnumber[$baseClass][$stage][$id] = $version;
}
return $version;
}
/**
* Pre-populate the cache for Versioned::get_versionnumber_by_stage() for
* a list of record IDs, for more efficient database querying. If $idList
* is null, then every record will be pre-cached.
*
* @param string $class
* @param string $stage
* @param array $idList
*/
public static function prepopulate_versionnumber_cache($class, $stage, $idList = null) {
if (!Config::inst()->get('Versioned', 'prepopulate_versionnumber_cache')) {
return;
}
$filter = "";
$parameters = array();
if($idList) {
// Validate the ID list
foreach($idList as $id) {
if(!is_numeric($id)) {
user_error("Bad ID passed to Versioned::prepopulate_versionnumber_cache() in \$idList: " . $id,
E_USER_ERROR);
}
}
$filter = 'WHERE "ID" IN ('.DB::placeholders($idList).')';
$parameters = $idList;
}
$baseClass = ClassInfo::baseDataClass($class);
$stageTable = ($stage == 'Stage') ? $baseClass : "{$baseClass}_{$stage}";
$versions = DB::prepared_query("SELECT \"ID\", \"Version\" FROM \"$stageTable\" $filter", $parameters)->map();
foreach($versions as $id => $version) {
self::$cache_versionnumber[$baseClass][$stage][$id] = $version;
}
}
/**
* Get a set of class instances by the given stage.
*
* @param string $class The name of the class.
* @param string $stage The name of the stage.
* @param string $filter A filter to be inserted into the WHERE clause.
* @param string $sort A sort expression to be inserted into the ORDER BY clause.
* @param string $join Deprecated, use leftJoin($table, $joinClause) instead
* @param int $limit A limit on the number of records returned from the database.
* @param string $containerClass The container class for the result set (default is DataList)
*
* @return DataList A modified DataList designated to the specified stage
*/
public static function get_by_stage(
$class, $stage, $filter = '', $sort = '', $join = '', $limit = null, $containerClass = 'DataList'
) {
$result = DataObject::get($class, $filter, $sort, $join, $limit, $containerClass);
return $result->setDataQueryParam(array(
'Versioned.mode' => 'stage',
'Versioned.stage' => $stage
));
}
/**
* Delete this record from the given stage
*
* @param string $stage
*/
public function deleteFromStage($stage) {
$oldMode = Versioned::get_reading_mode();
Versioned::set_stage($stage);
$owner = $this->owner;
$clone = clone $owner;
$clone->delete();
Versioned::set_reading_mode($oldMode);
// Fix the version number cache (in case you go delete from stage and then check ExistsOnLive)
$baseClass = ClassInfo::baseDataClass($owner->class);
self::$cache_versionnumber[$baseClass][$stage][$owner->ID] = null;
}
/**
* Write the given record to the draft stage
*
* @param string $stage
* @param boolean $forceInsert
* @return int The ID of the record
*/
public function writeToStage($stage, $forceInsert = false) {
$oldMode = Versioned::get_reading_mode();
Versioned::set_stage($stage);
$owner = $this->owner;
$owner->forceChange();
$result = $owner->write(false, $forceInsert);
Versioned::set_reading_mode($oldMode);
return $result;
}
/**
* Roll the draft version of this record to match the published record.
* Caution: Doesn't overwrite the object properties with the rolled back version.
*
* {@see doRevertToLive()} to reollback to live
*
* @param int $version Version number
*/
public function doRollbackTo($version) {
$owner = $this->owner;
$owner->extend('onBeforeRollback', $version);
$owner->publish($version, "Stage", true);
$owner->writeWithoutVersion();
$owner->extend('onAfterRollback', $version);
}
public function onAfterRollback($version) {
// Find record at this version
$baseClass = ClassInfo::baseDataClass($this->owner);
$recordVersion = static::get_version($baseClass, $this->owner->ID, $version);
// Note that unlike other publishing actions, rollback is NOT recursive;
// The owner collects all objects and writes them back using writeToStage();
foreach ($recordVersion->findOwned() as $object) {
/** @var Versioned|DataObject $object */
$object->writeToStage(static::DRAFT);
}
}
/**
* Return the latest version of the given record.
*
* @param string $class
* @param int $id
* @return DataObject
*/
public static function get_latest_version($class, $id) {
$baseClass = ClassInfo::baseDataClass($class);
$list = DataList::create($baseClass)
->setDataQueryParam("Versioned.mode", "latest_versions");
return $list->byID($id);
}
/**
* Returns whether the current record is the latest one.
*
* @todo Performance - could do this directly via SQL.
*
* @see get_latest_version()
* @see latestPublished
*
* @return boolean
*/
public function isLatestVersion() {
$owner = $this->owner;
if(!$owner->isInDB()) {
return false;
}
$version = static::get_latest_version($owner->class, $owner->ID);
return ($version->Version == $owner->Version);
}
/**
* Check if this record exists on live
*
* @return bool
*/
public function isPublished() {
$owner = $this->owner;
if(!$owner->isInDB()) {
return false;
}
// Non-staged objects are considered "published" if saved
if(!$this->hasStages()) {
return true;
}
$baseClass = ClassInfo::baseDataClass($owner->class);
$table = $this->stageTable($baseClass, static::LIVE);
$result = DB::prepared_query(
"SELECT COUNT(*) FROM \"{$table}\" WHERE \"{$table}\".\"ID\" = ?",
array($owner->ID)
);
return (bool)$result->value();
}
/**
* Check if this record exists on the draft stage
*
* @return bool
*/
public function isOnDraft() {
$owner = $this->owner;
if(!$owner->isInDB()) {
return false;
}
$table = ClassInfo::baseDataClass($owner->class);
$result = DB::prepared_query(
"SELECT COUNT(*) FROM \"{$table}\" WHERE \"{$table}\".\"ID\" = ?",
array($owner->ID)
);
return (bool)$result->value();
}
/**
* Return the equivalent of a DataList::create() call, querying the latest
* version of each record stored in the (class)_versions tables.
*
* In particular, this will query deleted records as well as active ones.
*
* @param string $class
* @param string $filter
* @param string $sort
* @return DataList
*/
public static function get_including_deleted($class, $filter = "", $sort = "") {
$list = DataList::create($class)
->where($filter)
->sort($sort)
->setDataQueryParam("Versioned.mode", "latest_versions");
return $list;
}
/**
* Return the specific version of the given id.
*
* Caution: The record is retrieved as a DataObject, but saving back
* modifications via write() will create a new version, rather than
* modifying the existing one.
*
* @param string $class
* @param int $id
* @param int $version
*
* @return DataObject
*/
public static function get_version($class, $id, $version) {
$baseClass = ClassInfo::baseDataClass($class);
$list = DataList::create($baseClass)
->setDataQueryParam([
"Versioned.mode" => 'version',
"Versioned.version" => $version
]);
return $list->byID($id);
}
/**
* Return a list of all versions for a given id.
*
* @param string $class
* @param int $id
*
* @return DataList
*/
public static function get_all_versions($class, $id) {
$list = DataList::create($class)
->filter('ID', $id)
->setDataQueryParam('Versioned.mode', 'all_versions');
return $list;
}
/**
* @param array $labels
*/
public function updateFieldLabels(&$labels) {
$labels['Versions'] = _t('Versioned.has_many_Versions', 'Versions', 'Past Versions of this record');
}
/**
* @param FieldList
*/
public function updateCMSFields(FieldList $fields) {
// remove the version field from the CMS as this should be left
// entirely up to the extension (not the cms user).
$fields->removeByName('Version');
}
/**
* Ensure version ID is reset to 0 on duplicate
*
* @param DataObject $source Record this was duplicated from
* @param bool $doWrite
*/
public function onBeforeDuplicate($source, $doWrite) {
$this->owner->Version = 0;
}
public function flushCache() {
self::$cache_versionnumber = array();
}
/**
* Return a piece of text to keep DataObject cache keys appropriately specific.
*
* @return string
*/
public function cacheKeyComponent() {
return 'versionedmode-'.static::get_reading_mode();
}
/**
* Returns an array of possible stages.
*
* @return array
*/
public function getVersionedStages() {
if($this->hasStages()) {
return [static::DRAFT, static::LIVE];
} else {
return [static::DRAFT];
}
}
public static function get_template_global_variables() {
return array(
'CurrentReadingMode' => 'get_reading_mode'
);
}
/**
* Check if this object has stages
*
* @return bool True if this object is staged
*/
public function hasStages() {
return $this->mode === static::STAGEDVERSIONED;
}
}
/**
* Represents a single version of a record.
*
* @package framework
* @subpackage model
*
* @see Versioned
*/
class Versioned_Version extends ViewableData {
/**
* @var array
*/
protected $record;
/**
* @var DataObject
*/
protected $object;
/**
* Create a new version from a database row
*
* @param array $record
*/
public function __construct($record) {
$this->record = $record;
$record['ID'] = $record['RecordID'];
$className = $record['ClassName'];
$this->object = ClassInfo::exists($className) ? new $className($record) : new DataObject($record);
$this->failover = $this->object;
parent::__construct();
}
/**
* Either 'published' if published, or 'internal' if not.
*
* @return string
*/
public function PublishedClass() {
return $this->record['WasPublished'] ? 'published' : 'internal';
}
/**
* Author of this DataObject
*
* @return Member
*/
public function Author() {
return Member::get()->byId($this->record['AuthorID']);
}
/**
* Member object of the person who last published this record
*
* @return Member
*/
public function Publisher() {
if (!$this->record['WasPublished']) {
return null;
}
return Member::get()->byId($this->record['PublisherID']);
}
/**
* True if this record is published via publish() method
*
* @return boolean
*/
public function Published() {
return !empty($this->record['WasPublished']);
}
/**
* Traverses to a field referenced by relationships between data objects, returning the value
* The path to the related field is specified with dot separated syntax (eg: Parent.Child.Child.FieldName)
*
* @param $fieldName string
* @return string | null - will return null on a missing value
*/
public function relField($fieldName) {
$component = $this;
// We're dealing with relations here so we traverse the dot syntax
if(strpos($fieldName, '.') !== false) {
$relations = explode('.', $fieldName);
$fieldName = array_pop($relations);
foreach($relations as $relation) {
// Inspect $component for element $relation
if($component->hasMethod($relation)) {
// Check nested method
$component = $component->$relation();
} elseif($component instanceof SS_List) {
// Select adjacent relation from DataList
$component = $component->relation($relation);
} elseif($component instanceof DataObject
&& ($dbObject = $component->dbObject($relation))
) {
// Select db object
$component = $dbObject;
} else {
user_error("$relation is not a relation/field on ".get_class($component), E_USER_ERROR);
}
}
}
// Bail if the component is null
if(!$component) {
return null;
}
if ($component->hasMethod($fieldName)) {
return $component->$fieldName();
}
return $component->$fieldName;
}
}
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