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<?php |
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namespace MaksimM\MultiUnitModels\Traits; |
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use Illuminate\Database\Eloquent\Model; |
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use Illuminate\Support\Arr; |
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use MaksimM\MultiUnitModels\Exceptions\NotSupportedMultiUnitField; |
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use UnitConverter\Unit\AbstractUnit; |
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trait MultiUnitSupport |
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{ |
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protected $unitAttributePostfix = '_units'; |
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protected $unitConversionDataPostfix = '_ucd'; |
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protected $multiUnitColumns = []; |
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private function getUnitConversionDataColumns() |
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{ |
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return array_map(function ($column) { |
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return $column.$this->getUnitConversionDataPostfix(); |
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}, array_keys($this->getMultiUnitColumns())); |
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} |
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private function getUnitConversionUnitColumns() |
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{ |
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return array_map(function ($column) { |
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return $column.$this->getUnitAttributePostfix(); |
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}, array_keys($this->getMultiUnitColumns())); |
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} |
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/** |
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* Allows to set input units and process them before multi-unit field. |
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* |
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* @param array $attributes |
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* |
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* @return array |
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*/ |
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protected function fillableFromArray(array $attributes) |
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{ |
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return array_merge(array_intersect_key($attributes, array_flip($this->getUnitConversionUnitColumns())), parent::fillableFromArray($attributes)); |
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} |
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/** |
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* @return array |
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*/ |
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public function getFillable() |
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{ |
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return array_merge($this->getUnitConversionDataColumns(), $this->getUnitConversionUnitColumns(), parent::getFillable()); |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getHidden() |
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{ |
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return array_merge(parent::getHidden(), $this->getUnitConversionDataColumns()); |
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} |
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protected static function bootMultiUnitSupport() |
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{ |
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//save conversion table if base value is changed |
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static::creating(function ($model) { |
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/** |
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* @var Model|MultiUnitSupport $model |
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*/ |
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foreach ($model->getMultiUnitColumns() as $unitBasedColumn => $options) { |
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if (isset($model->attributes[$unitBasedColumn])) { |
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$model->{$unitBasedColumn.$model->getUnitConversionDataPostfix()} = json_encode( |
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$model->calculateMultiUnitConversionData( |
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$model->attributes[$unitBasedColumn], |
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$model->getMultiUnitFieldUnit($unitBasedColumn), |
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$options['supported_units'] |
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) |
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); |
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$model->{$unitBasedColumn} = $model->processMultiUnitFieldChanges( |
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$unitBasedColumn, |
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$model->{$unitBasedColumn} |
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); |
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} |
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} |
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//prevent saving of unit columns |
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foreach ($model->getUnitConversionUnitColumns() as $unitColumn) { |
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if (isset($model->attributes[$unitColumn])) { |
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unset($model->attributes[$unitColumn]); |
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} |
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} |
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}); |
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static::updating(function ($model) { |
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/** |
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* @var Model|MultiUnitSupport $model |
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*/ |
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foreach (Arr::only($model->getMultiUnitColumns(), array_keys($model->getDirty())) as $unitBasedColumn => $options) { |
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$model->{$unitBasedColumn.$model->getUnitConversionDataPostfix()} = json_encode($model->calculateMultiUnitConversionData($model->getDirty()[$unitBasedColumn], new $options['default_unit'](), $options['supported_units'])); |
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} |
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}); |
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} |
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/** |
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* @param $value |
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* @param AbstractUnit $unit |
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* @param string[] $requiredUnits |
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* |
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* @return array |
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*/ |
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private function calculateMultiUnitConversionData($value, AbstractUnit $unit, $requiredUnits) |
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{ |
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$conversionData = []; |
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foreach ($requiredUnits as $requiredUnitClass) { |
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/** |
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* @var AbstractUnit $requiredUnit |
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*/ |
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$requiredUnit = new $requiredUnitClass(); |
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$conversionData[$requiredUnit->getSymbol()] = (new $unit($value))->as($requiredUnit); |
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} |
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return $conversionData; |
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} |
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public function getMultiUnitExistingConversionData($field) |
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{ |
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return json_decode($this->{$field.$this->getUnitConversionDataPostfix()} ?? null); |
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} |
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/** |
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* @return string |
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*/ |
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public function getUnitAttributePostfix() |
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{ |
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return $this->unitAttributePostfix; |
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} |
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/** |
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* @return string |
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*/ |
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protected function getUnitConversionDataPostfix() |
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{ |
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return $this->unitConversionDataPostfix; |
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} |
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/** |
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* @return array |
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*/ |
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public function getMultiUnitColumns() |
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{ |
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return $this->multiUnitColumns; |
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} |
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/** |
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* @param $field |
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* |
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* @throws NotSupportedMultiUnitField |
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* |
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* @return AbstractUnit[] |
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*/ |
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public function getMultiUnitFieldSupportedUnits($field) |
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{ |
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if ($this->isMultiUnitField($field)) { |
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return $this->getMultiUnitColumns()[$field]['supported_units']; |
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} |
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throw new NotSupportedMultiUnitField($field); |
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} |
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/** |
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* @param $field |
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* |
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* @throws NotSupportedMultiUnitField |
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* |
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* @return AbstractUnit |
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*/ |
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public function getMultiUnitFieldDefaultUnit($field) |
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{ |
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if ($this->isMultiUnitField($field)) { |
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$unitClass = $this->getMultiUnitColumns()[$field]['default_unit']; |
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return new $unitClass(); |
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} |
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throw new NotSupportedMultiUnitField($field); |
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} |
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/** |
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* @param $field |
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* @param string $unit |
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* |
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* @throws NotSupportedMultiUnitField |
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* |
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* @return mixed |
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*/ |
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public function getMultiUnitFieldValueByUnitName($field, $unit = null) |
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{ |
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if ($this->isMultiUnitField($field)) { |
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if (isset($this->{$field})) { |
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if (is_null($unit)) { |
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$unit = $this->getMultiUnitFieldUnit($field); |
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} else { |
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foreach ($this->getMultiUnitFieldSupportedUnits($field) as $unitClass) { |
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/** |
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* @var AbstractUnit $unit |
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*/ |
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$supportedUnit = new $unitClass(); |
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if (strtolower($supportedUnit->getSymbol()) == strtolower($unit)) { |
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$unit = $supportedUnit; |
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break; |
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} |
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} |
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} |
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if (is_string($unit)) { |
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throw new NotSupportedMultiUnitField($field); |
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} |
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$existingConversionData = $this->getMultiUnitExistingConversionData($field); |
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View Code Duplication |
if (!is_null($existingConversionData) && !is_null($existingConversionData->{$unit->getSymbol()})) { |
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return $existingConversionData->{$unit->getSymbol()}; |
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} |
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return ($this->getMultiUnitFieldDefaultUnit($field)->setValue($this->{$field} ?? $this->attributes[$field]))->as(new $unit()); |
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} else { |
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return; |
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} |
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} |
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throw new NotSupportedMultiUnitField($field); |
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} |
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/** |
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* @param $field |
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* @param AbstractUnit|null $unit |
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* |
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* @throws NotSupportedMultiUnitField |
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* |
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* @return mixed |
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*/ |
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public function getMultiUnitFieldValue($field, AbstractUnit $unit = null) |
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{ |
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if ($this->isMultiUnitField($field)) { |
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if (isset($this->{$field})) { |
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if (is_null($unit)) { |
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$unit = $this->getMultiUnitFieldUnit($field); |
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} |
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$existingConversionData = $this->getMultiUnitExistingConversionData($field); |
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View Code Duplication |
if (!is_null($existingConversionData) && !is_null($existingConversionData->{$unit->getSymbol()})) { |
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return $existingConversionData->{$unit->getSymbol()}; |
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} |
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return ($this->getMultiUnitFieldDefaultUnit($field)->setValue($this->{$field} ?? $this->attributes[$field]))->as(new $unit()); |
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} else { |
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return; |
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} |
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} |
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throw new NotSupportedMultiUnitField($field); |
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} |
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protected function isMultiUnitField($field) |
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{ |
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return isset($this->getMultiUnitColumns()[$field]); |
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} |
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/** |
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* @param $field |
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* |
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* @throws NotSupportedMultiUnitField |
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* |
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* @return AbstractUnit |
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*/ |
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protected function getMultiUnitFieldUnit($field) |
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{ |
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if (isset($this->{$field.$this->getUnitAttributePostfix()})) { |
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foreach ($this->getMultiUnitFieldSupportedUnits($field) as $unitClass) { |
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/** |
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* @var AbstractUnit $unit |
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*/ |
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$unit = new $unitClass(); |
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if (strtolower($unit->getSymbol()) == strtolower($this->{$field.$this->getUnitAttributePostfix()})) { |
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return $unit; |
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} |
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} |
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} |
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return $this->getMultiUnitFieldDefaultUnit($field); |
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} |
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protected function forgetMultiUnitFieldUnitInput($field) |
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{ |
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//prevent column_units to by saved to DB |
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if (isset($this->attributes[$field.$this->getUnitAttributePostfix()])) { |
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$this->syncOriginalAttribute($field.$this->getUnitAttributePostfix()); |
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} |
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} |
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protected function setMultiUnitFieldUnit($field, AbstractUnit $unit) |
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{ |
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$this->{$field.$this->getUnitAttributePostfix()} = $unit->getSymbol(); |
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$this->forgetMultiUnitFieldUnitInput($field); |
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} |
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/** |
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* @param $field |
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* |
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* @throws NotSupportedMultiUnitField |
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*/ |
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protected function resetMultiUnitFieldUnit($field) |
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{ |
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$this->setMultiUnitFieldUnit($field, $this->getMultiUnitFieldDefaultUnit($field)); |
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} |
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/** |
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* Determine if a set mutator exists for an attribute. |
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* |
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* @param string $key |
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* |
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* @return bool |
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*/ |
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public function hasSetMutator($key) |
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{ |
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if ($this->isMultiUnitField($key)) { |
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return true; |
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} |
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return parent::hasSetMutator($key); |
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} |
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/** |
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* Set the value of an attribute using its mutator. |
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* |
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* @param string $key |
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* @param mixed $value |
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327
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* |
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* @throws NotSupportedMultiUnitField |
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* |
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* @return mixed |
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331
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*/ |
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332
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protected function setMutatedAttributeValue($key, $value) |
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333
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{ |
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334
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|
|
if ($this->isMultiUnitField($key)) { |
|
335
|
|
|
$value = $this->processMultiUnitFieldChanges($key, $value); |
|
336
|
|
|
$this->attributes[$key] = $value; |
|
337
|
|
|
|
|
338
|
|
|
return $value; |
|
339
|
|
|
} |
|
340
|
|
|
|
|
341
|
|
|
parent::setMutatedAttributeValue($key, $value); |
|
342
|
|
|
} |
|
343
|
|
|
|
|
344
|
|
|
/** |
|
345
|
|
|
* Detect changes and set proper base value. |
|
346
|
|
|
* |
|
347
|
|
|
* @param $field |
|
348
|
|
|
* @param $value |
|
349
|
|
|
* |
|
350
|
|
|
* @throws NotSupportedMultiUnitField |
|
351
|
|
|
* |
|
352
|
|
|
* @return mixed |
|
353
|
|
|
*/ |
|
354
|
|
|
private function processMultiUnitFieldChanges($field, $value) |
|
355
|
|
|
{ |
|
356
|
|
|
$existingConversionData = $this->getMultiUnitExistingConversionData($field); |
|
357
|
|
|
if (!is_null($existingConversionData)) { |
|
358
|
|
|
$inputUnit = $this->getMultiUnitFieldUnit($field); |
|
359
|
|
|
//change existing value only in case if new value doesn't match with stored conversion table or not exists |
|
360
|
|
|
if (!isset($existingConversionData->{$inputUnit->getSymbol()}) || $value != $existingConversionData->{$inputUnit->getSymbol()}) { |
|
361
|
|
|
$this->resetMultiUnitFieldUnit($field); |
|
362
|
|
|
|
|
363
|
|
|
return (new $inputUnit($value))->as($this->getMultiUnitFieldDefaultUnit($field)); |
|
364
|
|
|
} elseif ($value == $existingConversionData->{$inputUnit->getSymbol()}) { |
|
365
|
|
|
//forget changes if value actually isn't changed |
|
366
|
|
|
$this->resetMultiUnitFieldUnit($field); |
|
367
|
|
|
$originalValue = $existingConversionData->{$this->getMultiUnitFieldDefaultUnit($field)->getSymbol()}; |
|
368
|
|
|
$this->attributes[$field] = $originalValue; |
|
369
|
|
|
$this->syncOriginalAttribute($field); |
|
|
|
|
|
|
370
|
|
|
|
|
371
|
|
|
return $originalValue; |
|
372
|
|
|
} |
|
373
|
|
|
$this->resetMultiUnitFieldUnit($field); |
|
374
|
|
|
} |
|
375
|
|
|
|
|
376
|
|
|
return $value; |
|
377
|
|
|
} |
|
378
|
|
|
|
|
379
|
|
|
/** |
|
380
|
|
|
* Determine if a get mutator exists for an attribute. |
|
381
|
|
|
*coo. |
|
382
|
|
|
* |
|
383
|
|
|
* @param string $key |
|
384
|
|
|
* |
|
385
|
|
|
* @return bool |
|
386
|
|
|
*/ |
|
387
|
|
|
public function hasGetMutator($key) |
|
388
|
|
|
{ |
|
389
|
|
|
if ($this->isMultiUnitField($key) && isset($this->{$key})) { |
|
390
|
|
|
return true; |
|
391
|
|
|
} |
|
392
|
|
|
|
|
393
|
|
|
return parent::hasGetMutator($key); |
|
394
|
|
|
} |
|
395
|
|
|
|
|
396
|
|
|
/** |
|
397
|
|
|
* Get the value of an attribute using its mutator. |
|
398
|
|
|
* |
|
399
|
|
|
* @param string $key |
|
400
|
|
|
* @param mixed $value |
|
401
|
|
|
* |
|
402
|
|
|
* @throws NotSupportedMultiUnitField |
|
403
|
|
|
* |
|
404
|
|
|
* @return mixed |
|
405
|
|
|
*/ |
|
406
|
|
|
public function mutateAttribute($key, $value) |
|
407
|
|
|
{ |
|
408
|
|
|
if ($this->isMultiUnitField($key)) { |
|
409
|
|
|
$requestedUnit = $this->getMultiUnitFieldUnit($key); |
|
410
|
|
|
|
|
411
|
|
|
return $this->getMultiUnitFieldValue($key, new $requestedUnit()); |
|
412
|
|
|
} |
|
413
|
|
|
|
|
414
|
|
|
return parent::mutateAttribute($key, $value); |
|
415
|
|
|
} |
|
416
|
|
|
} |
|
417
|
|
|
|
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.