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<?php |
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declare(strict_types=1); |
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namespace Wowstack\Dbc\MappingField; |
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/** |
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* Provides generic features for all field types. |
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*/ |
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abstract class AbstractField |
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{ |
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/** |
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* Name of type. |
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*/ |
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const TYPE = 'undefined'; |
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/** |
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* @var string field name |
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*/ |
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protected $name = 'undefined'; |
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/** |
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* Size of field in bytes. |
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*/ |
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protected $size = 0; |
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/** |
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* Amount of fields to follow. |
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* |
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* @var int |
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*/ |
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protected $count = 0; |
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/** |
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* Defines required parameters. |
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*/ |
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const PARAMETERS = ['count']; |
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/** |
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* Defines optional parameters and their defaults. |
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*/ |
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const OPTIONAL_PARAMETERS = []; |
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/** |
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* Format used to pack/unpack this field type. |
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*/ |
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const PACK_FORMAT = ''; |
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/** |
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* Sets required parameters. |
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* |
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* @param array $parameters |
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* |
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* @throws MappingException |
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*/ |
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public function setParameters(array $parameters = []) |
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{ |
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foreach ($this::PARAMETERS as $key) { |
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if (!array_key_exists($key, $parameters)) { |
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throw new MappingException("Parameter ${key} missing."); |
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} |
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$this->{$key} = $parameters[$key]; |
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} |
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} |
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/** |
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* Sets optional parameters. |
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* |
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* @param array $parameters |
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*/ |
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public function setOptionalParameters(array $parameters = []) |
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{ |
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foreach ($this::OPTIONAL_PARAMETERS as $key => $default) { |
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if (array_key_exists($key, $parameters)) { |
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$this->{$key} = $parameters[$key]; |
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} else { |
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$this->{$key} = $default; |
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} |
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} |
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} |
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/** |
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* Provides the name of the field. |
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* |
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* @return string |
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*/ |
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public function getName(): string |
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{ |
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return $this->name; |
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} |
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/** |
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* Provides the type of the field. |
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* |
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* @return string |
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*/ |
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public function getType(): string |
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{ |
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return $this::TYPE; |
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} |
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/** |
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* Provides how many bytes this field requires. |
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* |
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* @return int |
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*/ |
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public function getSize(): int |
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{ |
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return $this->size; |
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} |
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/** |
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* Provides how many of this field follow. |
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* |
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* @return int |
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*/ |
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public function getCount(): int |
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{ |
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return $this->count; |
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} |
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/** |
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* Provides how many of this field follow. |
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* |
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* @return int |
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*/ |
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public function getTotalCount(): int |
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{ |
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return $this->count; |
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} |
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/** |
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* Provides how many bytes for all fields follow. |
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* |
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* @return int |
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*/ |
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public function getTotalSize(): int |
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{ |
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return $this->count * $this->size; |
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} |
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/** |
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* Returns the offset at which to find the data. |
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* |
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* @return int |
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*/ |
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public function getOffset(): int |
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{ |
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return 0; |
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} |
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/** |
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* Returns the resulting field(s). |
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* |
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* @return array |
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*/ |
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public function getParsedFields(): array |
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{ |
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$count = 1; |
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$parsedFields = []; |
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while ($count <= $this->getCount()) { |
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$fieldName = ($this->getCount() > 1 ? $this->getName().$count : $this->getName()); |
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$parsedField = [ |
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'type' => $this->getType(), |
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'size' => $this->getSize(), |
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'format' => $this::PACK_FORMAT.'1'.$fieldName, |
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'offset' => $this->getOffset(), |
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]; |
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$parsedFields[$fieldName] = $parsedField; |
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++$count; |
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} |
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return $parsedFields; |
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} |
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} |
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