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datatable.directory/app/Tables/Changeset.php

264 lines
6.6 KiB

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<?php
namespace App\Tables;
use App\Models\Revision;
use App\Models\Table;
use Illuminate\Queue\SerializesModels;
use ReflectionClass;
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/**
* Object representing a set of table modifications
*/
class Changeset
{
use SerializesModels;
const object_excluded_properties = [
'revision',
'table',
'note',
];
/**
* @var Revision - base revision this changeset belongs to
*/
public $revision;
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/**
* @var Table - table this changeset belongs to
*/
public $table;
/**
* @var string - user's note attached to this changeset (future proposal)
*/
public $note;
/**
* Rows whose content changed, identified by _id.
* Only changed values are to be filled. Columns are identified by GCIDs
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*
* Key'd by _id
*
* @var array|null - [_id -> [_id:…, cid:…, cid:…], …]
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*/
public $rowUpdates = [];
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/**
* New rows in the full Row::data format, including GRIDs.
* Values are identified by GCIDs from previously defined, or new columns.
*
* @var array|null - [[_id:…, cid:…, cid:…], …]
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*/
public $newRows = [];
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/**
* Rows to be removed
*
* @var int[]|null - GRIDs
*/
public $removedRows = [];
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/**
* Values changed in column specifications, such as name, title, etc.
* This does not affect the table rows in any way.
*
* Key'd by id
*
* @var array[] - column specification objects, with GCIDs, key'd by CID
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*/
public $columnUpdates = [];
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/**
* New columns in the full format, including GCIDs
*
* @var array|null - [[id:…, …], …]
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*/
public $newColumns = [];
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/**
* When reordering columns, here is the column IDs array
* in the new order. Columns meanwhile removed from the table
* or added to it are to be ignored or appended at the end.
*
* This shall not be filled if merely editing or adding columns,
* unless the order is explicitly adjusted by the user.
*
* @var string[]|null - GCIDs
*/
public $columnOrder = [];
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/**
* Columns to be removed
*
* The data associated to those columns may or may not be removed from the Rows.
* It does not matter, other than in regard to the table size.
*
* @var int[]|null - GCIDs
*/
public $removedColumns = [];
/** @var Column[] - loaded and transformed columns, cached from previous call to transformColumns() */
private $cachedColumns;
private function walkProps()
{
$properties = (new ReflectionClass($this))->getProperties();
foreach ($properties as $property) {
if (in_array($property->name, self::object_excluded_properties)) {
continue;
}
yield $property->name;
}
}
/**
* Reconstruct from a object, such as one found in Proposal.
* Note that the fromProposal() method should be used when the
* proposal is available, as it populates additional fields.
*
* @param \stdClass $changes
* @return Changeset
*/
public static function fromObject($changes)
{
$changeset = new Changeset();
foreach ($changeset->walkProps() as $prop) {
if (isset($changes->$prop)) {
$changeset->$prop = $changes->$prop;
}
}
return $changeset;
}
/**
* Serialize to an object format that may be stored in a Proposal.
*
* @return \stdClass
*/
public function toObject()
{
$object = new \stdClass();
foreach ($this->walkProps() as $prop) {
$object->$prop = array_values($this->$prop);
}
return $object;
}
/**
* Check if there is any change in this changeset
*
* @return bool - any found
*/
public function hasAnyChanges()
{
foreach ($this->walkProps() as $prop) {
if (!empty($this->$prop)) {
return true;
}
}
return false;
}
/**
* Decorate / transform a single row for the editor view
*
* @param object|\DecoratedRow $row - row, must be key'd by column ids
* @param bool $decorate - to add extra underscored info for the editor
* @return \DecoratedRow|object|null - null if not decorating and the row was removed
*/
public function transformRow($row, $decorate)
{
if ($decorate) {
$row->_remove = false;
$row->_changed = [];
$row->_orig = [];
}
// Removed rows
if (in_array($row->_id, $this->removedRows)) {
if ($decorate) {
$row->_remove = true;
} else {
return null;
}
}
// Changed values
if (isset($this->rowUpdates[$row->_id])) {
$newVals = $this->rowUpdates[$row->_id];
if ($decorate) {
$row->_changed = array_keys($newVals);
$row->_orig = array_only((array)$row, $row->_changed);
}
$row = (object)array_merge((array)$row, $newVals);
}
// Drop deleted columns
if (!$decorate) {
foreach ($this->removedColumns as $colId) {
unset($row->$colId);
}
}
unset($row->_row_pivot);
return $row;
}
/**
* Decorate / transform columns (loaded from the source revision)
*
* @return Column[]
*/
public function transformColumns()
{
if ($this->cachedColumns) return $this->cachedColumns;
$columns = Column::columnsFromJson($this->revision->columns);
// Modify columns
$byId = [];
foreach ($columns as $column) {
$byId[$column->id] = $column;
if (isset($this->columnUpdates[$column->id])) {
$column->modifyByChangeset($this->columnUpdates[$column->id]);
}
if (in_array($column->id, $this->removedColumns)) {
$column->markForRemoval();
}
}
// Append new columns
foreach ($this->newColumns as $newColumn) {
$columns[] = $c =new Column($newColumn);
$c->markAsNew();
}
// Reorder
$newOrder = [];
foreach ($this->columnOrder as $id) {
$newOrder[] = $byId[$id];
}
$leftover_keys = array_diff(array_keys($byId), $this->columnOrder);
foreach ($leftover_keys as $id) {
$newOrder[] = $byId[$id];
}
return $this->cachedColumns = $newOrder;
}
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}