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<?php |
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/** |
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* @author Jared King <[email protected]> |
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* |
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* @link http://jaredtking.com |
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* |
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* @copyright 2015 Jared King |
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* @license MIT |
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*/ |
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namespace JAQB\Statement; |
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class OrderStatement extends Statement |
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{ |
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/** |
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* @var bool |
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*/ |
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protected $groupBy; |
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/** |
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* @var array |
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*/ |
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protected $fields = []; |
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/** |
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* @param bool $groupBy when true, statement becomes a group by statement |
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*/ |
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public function __construct($groupBy = false) |
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{ |
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$this->groupBy = $groupBy; |
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} |
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/** |
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* Tells whether this statement is a GROUP BY statement. |
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* |
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* @return bool true: is group by, false: is order by |
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*/ |
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public function isGroupBy() |
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{ |
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return $this->groupBy; |
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} |
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/** |
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* Adds fields to this statement |
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* Support input styles: |
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* - addFields('field ASC,field2') |
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* - addFields('field', 'ASC') |
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* - addFields(['field','field2'], 'DESC') |
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* - addFields([['field','ASC'], ['field2','ASC']]). |
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* |
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* @param string|array $fields |
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* @param string $direction direction for fields where direction is unspecified (optional) |
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* |
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* @return self |
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*/ |
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public function addFields($fields, $direction = false) |
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{ |
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if (!is_array($fields)) { |
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$fields = array_map(function ($f) { |
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return trim($f); |
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}, explode(',', $fields)); |
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} |
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foreach ($fields as $field) { |
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if (!is_array($field)) { |
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$field = explode(' ', trim($field)); |
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} |
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if (count($field) === 1 && $direction !== false) { |
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$field[] = $direction; |
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} |
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// validate the direction |
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if (count($field) === 1 || in_array(strtolower($field[1]), ['asc', 'desc'])) { |
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$this->fields[] = $field; |
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} |
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} |
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return $this; |
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} |
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/** |
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* Gets the fields associated with this statement. |
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* |
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* @return array fields i.e. [['field1','ASC'], ['field2']] |
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*/ |
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public function getFields() |
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{ |
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return $this->fields; |
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} |
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public function build() |
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{ |
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$fields = $this->fields; |
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foreach ($fields as &$field) { |
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$field[0] = $this->escapeIdentifier($field[0]); |
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$field = implode(' ', $field); |
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} |
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// remove empty values |
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$fields = array_filter($fields); |
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if (count($fields) == 0) { |
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return ''; |
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} |
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return ((!$this->groupBy) ? 'ORDER BY ' : 'GROUP BY '). |
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implode(',', $fields); |
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} |
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} |
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jaredtking /
jaqb
