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<?php |
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namespace Rougin\Windstorm\Relation; |
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use Rougin\Windstorm\QueryInterface; |
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/** |
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* Relation |
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* |
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* @package Windstorm |
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* @author Rougin Gutib <[email protected]> |
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*/ |
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abstract class Relation |
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{ |
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/** |
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* @var array |
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*/ |
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protected $alias = array(); |
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/** |
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* @var array |
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*/ |
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protected $fields = array(); |
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/** |
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* @var string|null |
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*/ |
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protected $foreign = null; |
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/** |
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* @var string|null |
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*/ |
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protected $primary = null; |
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/** |
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* @var \Rougin\Windstorm\QueryInterface |
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*/ |
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protected $query; |
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/** |
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* Initializes the relation interface. |
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* |
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* @param \Rougin\Windstorm\QueryInterface $query |
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*/ |
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public function __construct(QueryInterface $query) |
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{ |
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$this->fields[] = array(); |
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$this->fields[] = array(); |
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$this->query = $query; |
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} |
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/** |
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* Sets the field/column of a foreign/primary table. |
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* |
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* @param integer $type |
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* @param string $name |
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* @return self |
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*/ |
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public function field($type, $name) |
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{ |
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$this->fields[$type][] = $name; |
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} |
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/** |
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* Sets the fields of a foreign/primary table. |
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* |
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* @param integer $type |
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* @param string[] $values |
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* @return self |
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*/ |
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public function fields($type, array $values) |
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{ |
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$this->fields[$type] = array(); |
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foreach ($values as $field) |
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{ |
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$this->field($type, $field); |
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} |
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return $this; |
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} |
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/** |
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* Sets the foreign table. |
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* |
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* @param string $table |
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* @param string|null $alias |
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* @return self |
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*/ |
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public function foreign($table, $alias = null) |
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{ |
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$this->foreign = $table; |
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$this->alias[1] = $alias ?: $table[0]; |
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} |
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/** |
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* Sets the primary table. |
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* |
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* @param string $table |
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* @param string|null $alias |
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* @return self |
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*/ |
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public function primary($table, $alias = null) |
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{ |
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$this->primary = $table; |
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$this->alias[0] = $alias ?: $table[0]; |
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} |
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/** |
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* Parses specified fields as table columns. |
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* |
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* @param integer $type |
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* @param boolean $prefix |
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* @return array |
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*/ |
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protected function columns($type, $prefix = true) |
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{ |
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$alias = $this->alias[$type]; |
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$columns = array(); |
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foreach ($this->fields[$type] as $value) |
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{ |
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if ($type === 1 && $prefix) |
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{ |
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$column = $alias . '_' . $value; |
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$value .= " as $column"; |
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} |
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$columns[] = $alias . '.' . $value; |
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} |
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return (array) $columns; |
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} |
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} |
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|
rougin /
windstorm
