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<?php
namespace Faker\ORM\Spot;
use Faker\Generator;
use Faker\Guesser\Name;
use Spot\Locator;
use Spot\Mapper;
use Spot\Relation\BelongsTo;
/**
* Service class for populating a table through a Spot Entity class.
*/
class EntityPopulator
{
/**
* When fetching existing data - fetch only few first rows.
*/
const RELATED_FETCH_COUNT = 10;
/**
* @var Mapper
*/
protected $mapper;
/**
* @var Locator
*/
protected $locator;
/**
* @var array
*/
protected $columnFormatters = array();
/**
* @var array
*/
protected $modifiers = array();
/**
* @var bool
*/
protected $useExistingData = false;
/**
* Class constructor.
*
* @param Mapper $mapper
* @param Locator $locator
* @param $useExistingData
*/
public function __construct(Mapper $mapper, Locator $locator, $useExistingData = false)
{
$this->mapper = $mapper;
$this->locator = $locator;
$this->useExistingData = $useExistingData;
}
/**
* @return string
*/
public function getMapper()
{
return $this->mapper;
}
/**
* @param $columnFormatters
*/
public function setColumnFormatters($columnFormatters)
{
$this->columnFormatters = $columnFormatters;
}
/**
* @return array
*/
public function getColumnFormatters()
{
return $this->columnFormatters;
}
/**
* @param $columnFormatters
*/
public function mergeColumnFormattersWith($columnFormatters)
{
$this->columnFormatters = array_merge($this->columnFormatters, $columnFormatters);
}
/**
* @param array $modifiers
*/
public function setModifiers(array $modifiers)
{
$this->modifiers = $modifiers;
}
/**
* @return array
*/
public function getModifiers()
{
return $this->modifiers;
}
/**
* @param array $modifiers
*/
public function mergeModifiersWith(array $modifiers)
{
$this->modifiers = array_merge($this->modifiers, $modifiers);
}
/**
* @param Generator $generator
* @return array
*/
public function guessColumnFormatters(Generator $generator)
{
$formatters = array();
$nameGuesser = new Name($generator);
$columnTypeGuesser = new ColumnTypeGuesser($generator);
$fields = $this->mapper->fields();
foreach ($fields as $fieldName => $field) {
if ($field['primary'] === true) {
continue;
}
if ($formatter = $nameGuesser->guessFormat($fieldName)) {
$formatters[$fieldName] = $formatter;
continue;
}
if ($formatter = $columnTypeGuesser->guessFormat($field)) {
$formatters[$fieldName] = $formatter;
continue;
}
}
$entityName = $this->mapper->entity();
$entity = $this->mapper->build([]);
$relations = $entityName::relations($this->mapper, $entity);
foreach ($relations as $relation) {
// We don't need any other relation here.
if ($relation instanceof BelongsTo) {
$fieldName = $relation->localKey();
$entityName = $relation->entityName();
$field = $fields[$fieldName];
$required = $field['required'];
$locator = $this->locator;
$formatters[$fieldName] = function ($inserted) use ($required, $entityName, $locator) {
if (!empty($inserted[$entityName])) {
return $inserted[$entityName][mt_rand(0, count($inserted[$entityName]) - 1)]->get('id');
}
if ($required && $this->useExistingData) {
// We did not add anything like this, but it's required,
// So let's find something existing in DB.
$mapper = $locator->mapper($entityName);
$records = $mapper->all()->limit(self::RELATED_FETCH_COUNT)->toArray();
if (empty($records)) {
return null;
}
$id = $records[mt_rand(0, count($records) - 1)]['id'];
return $id;
}
return null;
};
}
}
return $formatters;
}
/**
* Insert one new record using the Entity class.
*
* @param $insertedEntities
* @return string
*/
public function execute($insertedEntities)
{
$obj = $this->mapper->build([]);
$this->fillColumns($obj, $insertedEntities);
$this->callMethods($obj, $insertedEntities);
$this->mapper->insert($obj);
return $obj;
}
/**
* @param $obj
* @param $insertedEntities
*/
private function fillColumns($obj, $insertedEntities)
{
foreach ($this->columnFormatters as $field => $format) {
if (null !== $format) {
$value = is_callable($format) ? $format($insertedEntities, $obj) : $format;
$obj->set($field, $value);
}
}
}
/**
* @param $obj
* @param $insertedEntities
*/
private function callMethods($obj, $insertedEntities)
{
foreach ($this->getModifiers() as $modifier) {
$modifier($obj, $insertedEntities);
}
}
}