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silverstripe-framework/model/Versioned.php
Damian Mooyman 19549d620f Moved deprecation of SQLQuery to 4.0
2014-12-04 09:30:50 +13:00

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<?php
/**
* 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.
*
* @package framework
* @subpackage model
*/
class Versioned extends DataExtension implements TemplateGlobalProvider {
/**
* An array of possible stages.
* @var array
*/
protected $stages;
/**
* The 'default' stage.
* @var string
*/
protected $defaultStage;
/**
* The 'live' stage.
* @var string
*/
protected $liveStage;
/**
* The default reading mode
*/
const DEFAULT_MODE = 'Stage.Live';
/**
* 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;
/**
* @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.
*
* @var boolean
*/
private static $prepopulate_versionnumber_cache = true;
/**
* Keep track of the archive tables that have been created.
*
* @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'),
* );
*
* Make sure your extension has a static $enabled-property that determines if it is
* processed by Versioned.
*
* @var array
*/
protected static $versionableExtensions = array('Translatable' => 'lang');
/**
* Reset static configuration variables to their default values.
*/
public static function reset() {
self::$reading_mode = '';
Session::clear('readingMode');
}
/**
* Construct a new Versioned object.
*
* @var array $stages The different stages the versioned object can be.
* The first stage is considered the 'default' stage, the last stage is
* considered the 'live' stage.
*/
public function __construct($stages = array('Stage','Live')) {
parent::__construct();
if(!is_array($stages)) {
$stages = func_get_args();
}
$this->stages = $stages;
$this->defaultStage = reset($stages);
$this->liveStage = array_pop($stages);
}
/**
* Amend freshly created DataQuery objects with versioned-specific
* information.
*
* @param SQLQuery
* @param DataQuery
*/
public function augmentDataQueryCreation(SQLQuery &$query, DataQuery &$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' && $parts[1] != $this->defaultStage
&& array_search($parts[1],$this->stages) !== false) {
$dataQuery->setQueryParam('Versioned.mode', 'stage');
$dataQuery->setQueryParam('Versioned.stage', $parts[1]);
}
}
/**
* Augment the the SQLQuery that is created by the DataQuery
* @todo Should this all go into VersionedDataQuery?
*/
public function augmentSQL(SQLQuery &$query, DataQuery &$dataQuery = null) {
if(!$dataQuery || !$dataQuery->getQueryParam('Versioned.mode')) {
return;
}
$baseTable = ClassInfo::baseDataClass($dataQuery->dataClass());
switch($dataQuery->getQueryParam('Versioned.mode')) {
// Reading a specific data from the archive
case 'archive':
$date = $dataQuery->getQueryParam('Versioned.date');
foreach($query->getFrom() as $table => $dummy) {
if(!DB::get_schema()->hasTable($table . '_versions')) {
continue;
}
$query->renameTable($table, $table . '_versions');
$query->replaceText("\"{$table}_versions\".\"ID\"", "\"{$table}_versions\".\"RecordID\"");
$query->replaceText("`{$table}_versions`.`ID`", "`{$table}_versions`.`RecordID`");
// 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->selectField(sprintf('"%s_versions"."%s"', $baseTable, 'RecordID'), "ID");
if($table != $baseTable) {
$query->addWhere("\"{$table}_versions\".\"Version\" = \"{$baseTable}_versions\".\"Version\"");
}
}
// Link to the version archived on that date
$query->addWhere(array(
"\"{$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;
// Reading a specific stage (Stage or Live)
case 'stage':
$stage = $dataQuery->getQueryParam('Versioned.stage');
if($stage && ($stage != $this->defaultStage)) {
foreach($query->getFrom() as $table => $dummy) {
// Only rewrite table names that are actually part of the subclass tree
// This helps prevent rewriting of other tables that get joined in, in
// particular, many_many tables
if(class_exists($table) && ($table == $this->owner->class
|| is_subclass_of($table, $this->owner->class)
|| is_subclass_of($this->owner->class, $table))) {
$query->renameTable($table, $table . '_' . $stage);
}
}
}
break;
// Reading a specific stage, but only return items that aren't in any other stage
case 'stage_unique':
$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);
$dataQuery->setQueryParam('Versioned.mode', 'stage_unique');
// Now exclude any ID from any other stage. Note that we double rename to avoid the regular stage rename
// renaming all subquery references to be Versioned.stage
foreach($this->stages as $excluding) {
if ($excluding == $stage) continue;
$tempName = 'ExclusionarySource_'.$excluding;
$excludingTable = $baseTable . ($excluding && $excluding != $this->defaultStage ? "_$excluding" : '');
$query->addWhere('"'.$baseTable.'"."ID" NOT IN (SELECT "ID" FROM "'.$tempName.'")');
$query->renameTable($tempName, $excludingTable);
}
break;
// Return all version instances
case 'all_versions':
case 'latest_versions':
foreach($query->getFrom() as $alias => $join) {
if($alias != $baseTable) {
$query->setJoinFilter($alias, "\"$alias\".\"RecordID\" = \"{$baseTable}_versions\".\"RecordID\""
. " AND \"$alias\".\"Version\" = \"{$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
$query->selectField(sprintf('"%s_versions"."%s"', $baseTable, 'RecordID'), "ID");
// Ensure that any sort order referring to this ID is correctly aliased
$orders = $query->getOrderBy();
foreach($orders as $order => $dir) {
if($order === "\"$baseTable\".\"ID\"") {
unset($orders[$order]);
$orders["\"{$baseTable}_versions\".\"RecordID\""] = $dir;
}
}
$query->setOrderBy($orders);
// latest_version has one more step
// Return latest version instances, regardless of whether they are on a particular stage
// This provides "show all, including deleted" functonality
if($dataQuery->getQueryParam('Versioned.mode') == 'latest_versions') {
$query->addWhere(
"\"{$alias}_versions\".\"Version\" IN
(SELECT LatestVersion FROM
(SELECT
\"{$alias}_versions\".\"RecordID\",
MAX(\"{$alias}_versions\".\"Version\") AS LatestVersion
FROM \"{$alias}_versions\"
GROUP BY \"{$alias}_versions\".\"RecordID\"
) AS \"{$alias}_versions_latest\"
WHERE \"{$alias}_versions_latest\".\"RecordID\" = \"{$alias}_versions\".\"RecordID\"
)");
} else {
// If all versions are requested, ensure that records are sorted by this field
$query->addOrderBy(sprintf('"%s_versions"."%s"', $baseTable, 'Version'));
}
break;
default:
throw new InvalidArgumentException("Bad value for query parameter Versioned.mode: "
. $dataQuery->getQueryParam('Versioned.mode'));
}
}
/**
* For lazy loaded fields requiring extra sql manipulation, ie versioning.
*
* @param SQLQuery $query
* @param DataQuery $dataQuery
* @param DataObject $dataObject
*/
public function augmentLoadLazyFields(SQLQuery &$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 = $dataQuery->dataClass();
$modesToAllowVersioning = array('all_versions', 'latest_versions', 'archive');
if(
!empty($dataObject->Version) &&
(!empty($versionedMode) && in_array($versionedMode,$modesToAllowVersioning))
) {
$dataQuery->where("\"$dataClass\".\"RecordID\" = " . $dataObject->ID);
$dataQuery->where("\"$dataClass\".\"Version\" = " . $dataObject->Version);
$dataQuery->setQueryParam('Versioned.mode', 'all_versions');
} else {
// Same behaviour as in DataObject->loadLazyFields
$dataQuery->where("\"$dataClass\".\"ID\" = {$dataObject->ID}")->limit(1);
}
}
/**
* 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
$db = DB::get_conn();
foreach(self::$archive_tables as $tableName) {
if(method_exists($db, 'dropTable')) $db->dropTable($tableName);
else $db->query("DROP TABLE \"$tableName\"");
}
// Remove references to them
self::$archive_tables = array();
}
public function augmentDatabase() {
$classTable = $this->owner->class;
$isRootClass = ($this->owner->class == ClassInfo::baseDataClass($this->owner->class));
// Build a list of suffixes whose tables need versioning
$allSuffixes = array();
foreach (Versioned::$versionableExtensions as $versionableExtension => $suffixes) {
if ($this->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 = $classTable;
if($fields = DataObject::database_fields($this->owner->class)) {
$options = Config::inst()->get($this->owner->class, 'create_table_options', Config::FIRST_SET);
$indexes = $this->owner->databaseIndexes();
if ($suffix && ($ext = $this->owner->getExtensionInstance($allSuffixes[$suffix]))) {
if (!$ext->isVersionedTable($table)) continue;
$ext->setOwner($this->owner);
$fields = $ext->fieldsInExtraTables($suffix);
$ext->clearOwner();
$indexes = $fields['indexes'];
$fields = $fields['db'];
}
// Create tables for other stages
foreach($this->stages as $stage) {
// Extra tables for _Live, etc.
// Change unique indexes to 'index'. Versioned tables may run into unique indexing difficulties
// otherwise.
$indexes = $this->uniqueToIndex($indexes);
if($stage != $this->defaultStage) {
DB::require_table("{$table}_$stage", $fields, $indexes, false, $options);
}
// Version fields on each root table (including Stage)
/*
if($isRootClass) {
$stageTable = ($stage == $this->defaultStage) ? $table : "{$table}_$stage";
$parts=Array('datatype'=>'int', 'precision'=>11, 'null'=>'not null', 'default'=>(int)0);
$values=Array('type'=>'int', 'parts'=>$parts);
DB::requireField($stageTable, 'Version', $values);
}
*/
}
if($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
$count = DB::query("
SELECT COUNT(*) FROM \"{$table}_versions\"
LEFT JOIN \"{$child}_versions\"
ON \"{$child}_versions\".\"RecordID\" = \"{$table}_versions\".\"RecordID\"
AND \"{$child}_versions\".\"Version\" = \"{$table}_versions\".\"Version\"
WHERE \"{$child}_versions\".\"ID\" IS NULL
")->value();
if($count > 0) {
DB::alteration_message("Removing orphaned versioned records", "deleted");
$affectedIDs = DB::query("
SELECT \"{$table}_versions\".\"ID\" FROM \"{$table}_versions\"
LEFT JOIN \"{$child}_versions\"
ON \"{$child}_versions\".\"RecordID\" = \"{$table}_versions\".\"RecordID\"
AND \"{$child}_versions\".\"Version\" = \"{$table}_versions\".\"Version\"
WHERE \"{$child}_versions\".\"ID\" IS NULL
")->column();
if(is_array($affectedIDs)) {
foreach($affectedIDs as $key => $value) {
DB::prepared_query(
"DELETE FROM \"{$table}_versions\" WHERE \"ID\" = ?",
array($value)
);
}
}
}
}
}
}
DB::require_table("{$table}_versions", $versionFields, $versionIndexes, true, $options);
} else {
DB::dont_require_table("{$table}_versions");
foreach($this->stages as $stage) {
if($stage != $this->defaultStage) DB::dont_require_table("{$table}_$stage");
}
}
}
}
/**
* 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) 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;
// Add the version number to this data
$manipulation[$table]['fields']['Version'] = $nextVersion;
$newManipulation['fields']['Version'] = $nextVersion;
// Write AuthorID for baseclass
if($table === $baseDataClass) {
$userID = (Member::currentUser()) ? Member::currentUser()->ID : 0;
$newManipulation['fields']['AuthorID'] = $userID;
}
$manipulation["{$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 = $table . '_' . Versioned::current_stage();
$manipulation[$newTable] = $manipulation[$table];
unset($manipulation[$table]);
}
public function augmentWrite(&$manipulation) {
$tables = array_keys($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[$table], true), E_USER_ERROR);
if($this->migratingVersion) {
$manipulation[$table]['fields']['Version'] = $this->migratingVersion;
}
// If we haven't got a version #, then we're creating a new version.
// Otherwise, we're just copying a version to another table
if(empty($manipulation[$table]['fields']['Version'])) {
$this->augmentWriteVersioned($manipulation, $table, $id);
}
// Putting a Version of -1 is a signal to leave the version table alone, despite their being no version
if($manipulation[$table]['fields']['Version'] < 0 || $this->_nextWriteWithoutVersion) {
unset($manipulation[$table]['fields']['Version']);
}
// For base classes of versioned data objects
if(!$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(
Versioned::current_stage()
&& Versioned::current_stage() != $this->defaultStage
&& in_array(Versioned::current_stage(), $this->stages)
) {
$this->augmentWriteStaged($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)) {
$this->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);
}
/**
* 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) {
$rPos = strrpos($table,'_');
if(($rPos !== false) && in_array(substr($table,$rPos), $this->stages)) {
$tableWithoutStage = substr($table,0,$rPos);
} else {
$tableWithoutStage = $table;
}
return ('DataObject' == get_parent_class($tableWithoutStage));
}
/**
* @param string $table
*
* @return string
*/
public function extendWithSuffix($table) {
foreach (Versioned::$versionableExtensions as $versionableExtension => $suffixes) {
if ($this->owner->hasExtension($versionableExtension)) {
$ext = $this->owner->getExtensionInstance($versionableExtension);
$ext->setOwner($this->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
$table1 = $this->owner->class;
while( ($p = get_parent_class($table1)) != "DataObject") $table1 = $p;
$table2 = $table1 . "_$this->liveStage";
return DB::prepared_query("SELECT \"$table1\".\"Version\" = \"$table2\".\"Version\" FROM \"$table1\"
INNER JOIN \"$table2\" ON \"$table1\".\"ID\" = \"$table2\".\"ID\"
WHERE \"$table1\".\"ID\" = ?",
array($this->owner->ID)
)->value();
}
/**
* Move a database record from one stage to the other.
*
* @param fromStage Place to copy from. Can be either a stage name or a version number.
* @param toStage Place to copy to. Must be a stage name.
* @param 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) {
$this->owner->extend('onBeforeVersionedPublish', $fromStage, $toStage, $createNewVersion);
$baseClass = $this->owner->class;
while( ($p = get_parent_class($baseClass)) != "DataObject") $baseClass = $p;
$extTable = $this->extendWithSuffix($baseClass);
if(is_numeric($fromStage)) {
$from = Versioned::get_version($baseClass, $this->owner->ID, $fromStage);
} else {
$this->owner->flushCache();
$from = Versioned::get_one_by_stage($baseClass, $fromStage, "\"{$baseClass}\".\"ID\"={$this->owner->ID}");
}
$publisherID = isset(Member::currentUser()->ID) ? Member::currentUser()->ID : 0;
if($from) {
$from->forceChange();
if($createNewVersion) {
$latest = self::get_latest_version($baseClass, $this->owner->ID);
$this->owner->Version = $latest->Version + 1;
} else {
$from->migrateVersion($from->Version);
}
// Mark this version as having been published at some stage
DB::prepared_query("UPDATE \"{$extTable}_versions\"
SET \"WasPublished\" = ?, \"PublisherID\" = ?
WHERE \"RecordID\" = ? AND \"Version\" = ?",
array(1, $publisherID, $from->ID, $from->Version)
);
$oldMode = Versioned::get_reading_mode();
Versioned::reading_stage($toStage);
$conn = DB::get_conn();
if(method_exists($conn, 'allowPrimaryKeyEditing')) $conn->allowPrimaryKeyEditing($baseClass, true);
$from->write();
if(method_exists($conn, 'allowPrimaryKeyEditing')) $conn->allowPrimaryKeyEditing($baseClass, false);
$from->destroy();
Versioned::set_reading_mode($oldMode);
} else {
user_error("Can't find {$this->owner->URLSegment}/{$this->owner->ID} in stage $fromStage", E_USER_WARNING);
}
}
/**
* 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 $stage2
*/
public function stagesDiffer($stage1, $stage2) {
$table1 = $this->baseTable($stage1);
$table2 = $this->baseTable($stage2);
if(!is_numeric($this->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($this->owner->ID)
)->value();
return !$stagesAreEqual;
}
/**
* @param string $filter
* @param string $sort
* @param string $limit
* @param string $join Deprecated, use leftJoin($table, $joinClause) instead
* @param string $having
*/
public function Versions($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 $having
*/
public function allVersions($filter = "", $sort = "", $limit = "", $join = "", $having = "") {
// Make sure the table names are not postfixed (e.g. _Live)
$oldMode = self::get_reading_mode();
self::reading_stage('Stage');
$list = DataObject::get(get_class($this->owner), $filter, $sort, $join, $limit);
if($having) $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\" = ?" => $this->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) {
$fromRecord = Versioned::get_version($this->owner->class, $this->owner->ID, $from);
$toRecord = Versioned::get_version($this->owner->class, $this->owner->ID, $to);
$diff = new DataDifferencer($fromRecord, $toRecord);
return $diff->diffedData();
}
/**
* Return the base table - the class that directly extends DataObject.
*
* @return string
*/
public function baseTable($stage = null) {
$tableClasses = ClassInfo::dataClassesFor($this->owner->class);
$baseClass = array_shift($tableClasses);
if(!$stage || $stage == $this->defaultStage) {
return $baseClass;
}
return $baseClass . "_$stage";
}
//-----------------------------------------------------------------------------------------------//
/**
* 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'.
*
* @param Session $session Optional session within which to store the resulting stage
*/
public static function choose_site_stage($session = null) {
// Check any pre-existing session mode
$preexistingMode = $session
? $session->inst_get('readingMode')
: Session::get('readingMode');
// Determine the reading mode
if(isset($_GET['stage'])) {
$stage = ucfirst(strtolower($_GET['stage']));
if(!in_array($stage, array('Stage', 'Live'))) $stage = 'Live';
$mode = 'Stage.' . $stage;
} elseif (isset($_GET['archiveDate']) && strtotime($_GET['archiveDate'])) {
$mode = 'Archive.' . $_GET['archiveDate'];
} elseif($preexistingMode) {
$mode = $preexistingMode;
} else {
$mode = self::DEFAULT_MODE;
}
// Save reading mode
Versioned::set_reading_mode($mode);
// Try not to store the mode in the session if not needed
if(($preexistingMode && $preexistingMode !== $mode)
|| (!$preexistingMode && $mode !== self::DEFAULT_MODE)
) {
if($session) {
$session->inst_set('readingMode', $mode);
} else {
Session::set('readingMode', $mode);
}
}
if(!headers_sent() && !Director::is_cli()) {
if(Versioned::current_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) {
Versioned::$reading_mode = $mode;
}
/**
* Get the current reading mode.
*
* @return string
*/
public static function get_reading_mode() {
return Versioned::$reading_mode;
}
/**
* Get the name of the 'live' stage.
*
* @return string
*/
public static function get_live_stage() {
return "Live";
}
/**
* Get the current reading stage.
*
* @return string
*/
public static function current_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 $stage New reading stage.
*/
public static function reading_stage($stage) {
Versioned::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 $orderby A sort expression to be inserted into the ORDER BY clause.
*
* @return DataObject
*/
public static function get_one_by_stage($class, $stage, $filter = '', $cache = true, $sort = '') {
// TODO: No identity cache operating
$items = self::get_by_stage($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 page 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 page 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 = '',
$containerClass = 'DataList') {
$result = DataObject::get($class, $filter, $sort, $join, $limit, $containerClass);
return $result->setDataQueryParam(array(
'Versioned.mode' => 'stage',
'Versioned.stage' => $stage
));
}
/**
* @param string $stage
*
* @return int
*/
public function deleteFromStage($stage) {
$oldMode = Versioned::get_reading_mode();
Versioned::reading_stage($stage);
$clone = clone $this->owner;
$result = $clone->delete();
Versioned::set_reading_mode($oldMode);
// Fix the version number cache (in case you go delete from stage and then check ExistsOnLive)
$baseClass = ClassInfo::baseDataClass($this->owner->class);
self::$cache_versionnumber[$baseClass][$stage][$this->owner->ID] = null;
return $result;
}
/**
* @param string $stage
* @param boolean $forceInsert
*/
public function writeToStage($stage, $forceInsert = false) {
$oldMode = Versioned::get_reading_mode();
Versioned::reading_stage($stage);
$this->owner->forceChange();
$result = $this->owner->write(false, $forceInsert);
Versioned::set_reading_mode($oldMode);
return $result;
}
/**
* Roll the draft version of this page to match the published page.
* Caution: Doesn't overwrite the object properties with the rolled back version.
*
* @param int $version Either the string 'Live' or a version number
*/
public function doRollbackTo($version) {
$this->owner->extend('onBeforeRollback', $version);
$this->publish($version, "Stage", true);
$this->owner->writeWithoutVersion();
$this->owner->extend('onAfterRollback', $version);
}
/**
* Return the latest version of the given page.
*
* @return DataObject
*/
public static function get_latest_version($class, $id) {
$baseClass = ClassInfo::baseDataClass($class);
$list = DataList::create($baseClass)
->where("\"$baseClass\".\"RecordID\" = $id")
->setDataQueryParam("Versioned.mode", "latest_versions");
return $list->First();
}
/**
* 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() {
$version = self::get_latest_version($this->owner->class, $this->owner->ID);
return ($version->Version == $this->owner->Version);
}
/**
* Return the equivalent of a DataList::create() call, querying the latest
* version of each page 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 $sort
*/
public static function get_including_deleted($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)
->where("\"$baseClass\".\"RecordID\" = $id")
->where("\"$baseClass\".\"Version\" = " . (int)$version)
->setDataQueryParam("Versioned.mode", 'all_versions');
return $list->First();
}
/**
* 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) {
$baseClass = ClassInfo::baseDataClass($class);
$list = DataList::create($class)
->where("\"$baseClass\".\"RecordID\" = $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 page');
}
/**
* @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).
$fields->removeByName('Version');
}
public function flushCache() {
self::$cache_versionnumber = array();
}
/**
* Return a piece of text to keep DataObject cache keys appropriately specific.
*
* @return string
*/
public function cacheKeyComponent() {
return 'versionedmode-'.self::get_reading_mode();
}
/**
* Returns an array of possible stages.
*
* @return array
*/
public function getVersionedStages() {
return $this->stages;
}
/**
* @return string
*/
public function getDefaultStage() {
return $this->defaultStage;
}
public static function get_template_global_variables() {
return array(
'CurrentReadingMode' => 'get_reading_mode'
);
}
}
/**
* 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 $object;
public function __construct($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();
}
/**
* @return string
*/
public function PublishedClass() {
return $this->record['WasPublished'] ? 'published' : 'internal';
}
/**
* @return Member
*/
public function Author() {
return Member::get()->byId($this->record['AuthorID']);
}
/**
* @return Member
*/
public function Publisher() {
if (!$this->record['WasPublished']) {
return null;
}
return Member::get()->byId($this->record['PublisherID']);
}
/**
* @return boolean
*/
public function Published() {
return !empty($this->record['WasPublished']);
}
/**
* Copied from DataObject to allow access via dot notation.
*/
public function relField($fieldName) {
$component = $this;
if(strpos($fieldName, '.') !== false) {
$parts = explode('.', $fieldName);
$fieldName = array_pop($parts);
// Traverse dot syntax
foreach($parts as $relation) {
if($component instanceof SS_List) {
if(method_exists($component,$relation)) {
$component = $component->$relation();
} else {
$component = $component->relation($relation);
}
} else {
$component = $component->$relation();
}
}
}
// Unlike has-one's, these "relations" can return false
if($component) {
if ($component->hasMethod($fieldName)) {
return $component->$fieldName();
}
return $component->$fieldName;
}
}
}
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