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<?php
namespace ipl\Orm;
use ArrayIterator;
use ipl\Orm\Contract\PersistBehavior;
use ipl\Orm\Contract\PropertyBehavior;
use ipl\Orm\Contract\RetrieveBehavior;
use ipl\Orm\Contract\RewriteColumnBehavior;
use ipl\Orm\Contract\RewriteFilterBehavior;
use ipl\Orm\Contract\RewritePathBehavior;
use ipl\Stdlib\Filter;
use IteratorAggregate;
use Traversable;
class Behaviors implements IteratorAggregate
{
/** @var array Registered behaviors */
protected $behaviors = [];
/** @var RetrieveBehavior[] Registered retrieve behaviors */
protected $retrieveBehaviors = [];
/** @var PersistBehavior[] Registered persist behaviors */
protected $persistBehaviors = [];
/** @var PropertyBehavior[] Registered property behaviors */
protected $propertyBehaviors = [];
/** @var RewriteFilterBehavior[] Registered rewrite filter behaviors */
protected $rewriteFilterBehaviors = [];
/** @var RewriteColumnBehavior[] Registered rewrite column behaviors */
protected $rewriteColumnBehaviors = [];
/** @var RewritePathBehavior[] Registered rewrite path behaviors */
protected $rewritePathBehaviors = [];
/**
* Add a behavior
*
* @param PersistBehavior|PropertyBehavior|RetrieveBehavior|RewriteFilterBehavior $behavior
*/
public function add(Behavior $behavior)
{
$this->behaviors[] = $behavior;
if ($behavior instanceof PropertyBehavior) {
$this->retrieveBehaviors[] = $behavior;
$this->persistBehaviors[] = $behavior;
$this->propertyBehaviors[] = $behavior;
} else {
if ($behavior instanceof RetrieveBehavior) {
$this->retrieveBehaviors[] = $behavior;
}
if ($behavior instanceof PersistBehavior) {
$this->persistBehaviors[] = $behavior;
}
}
if ($behavior instanceof RewriteFilterBehavior) {
$this->rewriteFilterBehaviors[] = $behavior;
}
if ($behavior instanceof RewriteColumnBehavior) {
$this->rewriteColumnBehaviors[] = $behavior;
}
if ($behavior instanceof RewritePathBehavior) {
$this->rewritePathBehaviors[] = $behavior;
}
}
/**
* Iterate registered behaviors
*
* @return ArrayIterator
*/
public function getIterator(): Traversable
{
return new ArrayIterator($this->behaviors);
}
/**
* Apply all retrieve behaviors on the given model
*
* @param Model $model
*/
public function retrieve(Model $model)
{
foreach ($this->retrieveBehaviors as $behavior) {
$behavior->retrieve($model);
}
}
/**
* Apply all persist behaviors on the given model
*
* @param Model $model
*/
public function persist(Model $model)
{
foreach ($this->persistBehaviors as $behavior) {
$behavior->persist($model);
}
}
/**
* Transform the retrieved key's value by use of all property behaviors
*
* @param mixed $value
* @param string $key
*
* @return mixed
*/
public function retrieveProperty($value, $key)
{
foreach ($this->propertyBehaviors as $behavior) {
$value = $behavior->retrieveProperty($value, $key);
}
return $value;
}
/**
* Transform the to be persisted key's value by use of all property behaviors
*
* @param mixed $value
* @param string $key
*
* @return mixed
*/
public function persistProperty($value, $key)
{
foreach ($this->propertyBehaviors as $behavior) {
$value = $behavior->persistProperty($value, $key);
}
return $value;
}
/**
* Rewrite the given filter condition
*
* @param Filter\Condition $condition
* @param string $relation Absolute path (with a trailing dot) of the model
*
* @return Filter\Rule|null
*/
public function rewriteCondition(Filter\Condition $condition, $relation = null)
{
$filter = null;
foreach ($this->rewriteFilterBehaviors as $behavior) {
$replacement = $behavior->rewriteCondition($filter ?: $condition, $relation);
if ($replacement !== null) {
$filter = $replacement;
}
}
return $filter;
}
/**
* Rewrite the given relation path
*
* @param string $path
* @param string $relation Absolute path of the model
*
* @return string|null
*/
public function rewritePath($path, $relation = null)
{
$newPath = null;
foreach ($this->rewritePathBehaviors as $behavior) {
$replacement = $behavior->rewritePath($newPath ?: $path, $relation);
if ($replacement !== null) {
$newPath = $replacement;
}
}
return $newPath;
}
/**
* Rewrite the given column
*
* @param string $column
* @param string $relation Absolute path of the model
*
* @return mixed
*/
public function rewriteColumn($column, $relation = null)
{
$newColumn = null;
foreach ($this->rewriteColumnBehaviors as $behavior) {
$replacement = $behavior->rewriteColumn($newColumn ?: $column, $relation);
if ($replacement !== null) {
$newColumn = $replacement;
}
}
return $newColumn;
}
/**
* Rewrite the given column definition
*
* @param ColumnDefinition $def
* @param string $relation Absolute path of the model
*
* @return void
*/
public function rewriteColumnDefinition(ColumnDefinition $def, string $relation): void
{
foreach ($this->rewriteColumnBehaviors as $behavior) {
$behavior->rewriteColumnDefinition($def, $relation);
}
}
/**
* Get whether the given column is selectable
*
* @param string $column
*
* @return bool
*/
public function isSelectableColumn(string $column): bool
{
foreach ($this->rewriteColumnBehaviors as $behavior) {
if ($behavior->isSelectableColumn($column)) {
return true;
}
}
return false;
}
}
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