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<?php |
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namespace Foolz\SphinxQL; |
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use Foolz\SphinxQL\Drivers\ConnectionInterface; |
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use Foolz\SphinxQL\Exception\SphinxQLException; |
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/** |
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* Query Builder class for Facet statements. |
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* @author Vicent Valls |
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*/ |
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class Facet |
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{ |
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/** |
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* A non-static connection for the current Facet object |
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* |
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* @var ConnectionInterface |
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*/ |
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protected $connection; |
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/** |
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* An SQL query that is not yet executed or "compiled" |
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* |
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* @var string |
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*/ |
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protected $query; |
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/** |
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* Array of select elements that will be comma separated. |
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* |
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* @var array |
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*/ |
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protected $facet = array(); |
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/** |
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* BY array to be comma separated |
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* |
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* @var array |
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*/ |
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protected $by = array(); |
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/** |
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* ORDER BY array |
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* |
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* @var array |
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*/ |
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protected $order_by = array(); |
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/** |
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* When not null it adds an offset |
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* |
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* @var null|int |
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*/ |
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protected $offset; |
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/** |
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* When not null it adds a limit |
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* |
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* @var null|int |
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*/ |
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protected $limit; |
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/** |
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* @param ConnectionInterface|null $connection |
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*/ |
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public function __construct(ConnectionInterface $connection = null) |
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{ |
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$this->connection = $connection; |
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} |
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/** |
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* Returns the currently attached connection |
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* |
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* @returns ConnectionInterface|null |
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*/ |
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public function getConnection() |
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{ |
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return $this->connection; |
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} |
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/** |
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* Sets the connection to be used |
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* |
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* @param ConnectionInterface $connection |
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* |
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* @return Facet |
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*/ |
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public function setConnection(ConnectionInterface $connection = null) |
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{ |
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$this->connection = $connection; |
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return $this; |
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} |
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/** |
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* Facet the columns |
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* |
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* Gets the arguments passed as $facet->facet('one', 'two') |
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* Using it with array maps values as column names |
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* |
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* Examples: |
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* $query->facet('idCategory'); |
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* // FACET idCategory |
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* |
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* $query->facet('idCategory', 'year'); |
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* // FACET idCategory, year |
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* |
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* $query->facet(array('categories' => 'idCategory', 'year', 'type' => 'idType')); |
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* // FACET idCategory AS categories, year, idType AS type |
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* |
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* @param array|string $columns Array or multiple string arguments containing column names |
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* |
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* @return Facet |
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*/ |
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public function facet($columns = null) |
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{ |
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if (!is_array($columns)) { |
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$columns = \func_get_args(); |
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} |
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foreach ($columns as $key => $column) { |
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if (is_int($key)) { |
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if (is_array($column)) { |
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$this->facet($column); |
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} else { |
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$this->facet[] = array($column, null); |
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} |
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} else { |
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$this->facet[] = array($column, $key); |
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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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* Facet a function |
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* |
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* Gets the function passed as $facet->facetFunction('FUNCTION', array('param1', 'param2', ...)) |
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* |
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* Examples: |
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* $query->facetFunction('category'); |
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* |
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* @param string $function Function name |
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* @param array|string $params Array or multiple string arguments containing column names |
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* |
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* @return Facet |
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*/ |
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public function facetFunction($function, $params = null) |
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{ |
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if (is_array($params)) { |
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$params = implode(',', $params); |
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} |
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$this->facet[] = new Expression($function.'('.$params.')'); |
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return $this; |
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} |
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/** |
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* GROUP BY clause |
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* Adds to the previously added columns |
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* |
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* @param string $column A column to group by |
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* |
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* @return Facet |
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*/ |
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public function by($column) |
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{ |
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$this->by = $column; |
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return $this; |
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} |
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/** |
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* ORDER BY clause |
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* Adds to the previously added columns |
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* |
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* @param string $column The column to order on |
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* @param string $direction The ordering direction (asc/desc) |
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* |
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* @return Facet |
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*/ |
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public function orderBy($column, $direction = null) |
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{ |
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$this->order_by[] = array('column' => $column, 'direction' => $direction); |
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return $this; |
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} |
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/** |
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* Facet a function |
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* |
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* Gets the function passed as $facet->facetFunction('FUNCTION', array('param1', 'param2', ...)) |
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* |
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* Examples: |
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* $query->facetFunction('category'); |
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* |
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* @param string $function Function name |
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* @param array $params Array string arguments containing column names |
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* @param string $direction The ordering direction (asc/desc) |
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* |
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* @return Facet |
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*/ |
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public function orderByFunction($function, $params = null, $direction = null) |
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{ |
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if (is_array($params)) { |
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$params = implode(',', $params); |
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} |
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$this->order_by[] = array('column' => new Expression($function.'('.$params.')'), 'direction' => $direction); |
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return $this; |
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} |
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/** |
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* LIMIT clause |
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* Supports also LIMIT offset, limit |
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* |
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* @param int $offset Offset if $limit is specified, else limit |
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* @param null|int $limit The limit to set, null for no limit |
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* |
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* @return Facet |
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*/ |
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public function limit($offset, $limit = null) |
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{ |
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if ($limit === null) { |
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$this->limit = (int) $offset; |
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return $this; |
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} |
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$this->offset($offset); |
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$this->limit = (int) $limit; |
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return $this; |
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} |
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/** |
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* OFFSET clause |
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* |
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* @param int $offset The offset |
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* |
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* @return Facet |
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*/ |
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public function offset($offset) |
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{ |
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$this->offset = (int) $offset; |
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return $this; |
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} |
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/** |
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* Compiles the statements for FACET |
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* |
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* @return Facet |
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* @throws SphinxQLException In case no column in facet |
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*/ |
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public function compileFacet() |
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{ |
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$query = 'FACET '; |
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if (!empty($this->facet)) { |
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$facets = array(); |
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foreach ($this->facet as $array) { |
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if ($array instanceof Expression) { |
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$facets[] = $array; |
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} elseif ($array[1] === null) { |
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$facets[] = $array[0]; |
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} else { |
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$facets[] = $array[0].' AS '.$array[1]; |
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} |
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} |
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$query .= implode(', ', $facets).' '; |
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} else { |
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throw new SphinxQLException('There is no column in facet.'); |
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} |
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if (!empty($this->by)) { |
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$query .= 'BY '.$this->by.' '; |
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} |
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if (!empty($this->order_by)) { |
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$query .= 'ORDER BY '; |
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$order_arr = array(); |
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foreach ($this->order_by as $order) { |
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$order_sub = $order['column'].' '; |
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$order_sub .= ((strtolower($order['direction']) === 'desc') ? 'DESC' : 'ASC'); |
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$order_arr[] = $order_sub; |
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} |
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$query .= implode(', ', $order_arr).' '; |
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} |
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if ($this->limit !== null || $this->offset !== null) { |
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if ($this->offset === null) { |
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$this->offset = 0; |
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} |
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if ($this->limit === null) { |
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$this->limit = 9999999999999; |
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} |
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$query .= 'LIMIT '.((int) $this->offset).', '.((int) $this->limit).' '; |
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} |
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$this->query = trim($query); |
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return $this; |
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} |
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/** |
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* Get String with SQL facet |
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* |
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* @return string |
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* @throws SphinxQLException |
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*/ |
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public function getFacet() |
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{ |
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return $this->compileFacet()->query; |
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} |
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} |
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