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<?php |
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/** |
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* @author Todd Burry <[email protected]> |
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* @copyright 2009-2014 Vanilla Forums Inc. |
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* @license MIT |
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*/ |
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namespace Garden\Db; |
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/** |
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* Represents an string that won't be escaped in queries. |
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*/ |
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class Literal { |
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/// Properties /// |
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/** |
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* @var array An array that maps driver names to literals. |
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*/ |
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protected $driverValues = []; |
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/// Methods /// |
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/** |
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* Initialize an instance of the {@link Literal} class. |
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* |
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* @param string|array $value Either a string default value or an array in the form |
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* `['driver' => 'literal']` to specify different literals for different database drivers. |
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*/ |
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public function __construct($value) { |
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if (is_string($value)) { |
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$this->driverValues['default'] = $value; |
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} elseif (is_array($value)) { |
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foreach ($value as $key => $value) { |
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$this->driverValues[$this->normalizeKey($key)] = $value; |
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} |
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} |
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} |
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/** |
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* Get the literal value. |
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* |
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* @param string $driver The name of the database driver to fetch the literal for. |
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* @return string Returns the value for the specific driver, the default literal, or "null" if there is no default. |
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*/ |
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public function getValue($driver = 'default') { |
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$driver = $this->normalizeKey($driver); |
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if (isset($this->driverValues[$driver])) { |
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return $this->driverValues[$driver]; |
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} elseif (isset($this->driverValues['default'])) { |
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return $this->driverValues['default']; |
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} else { |
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return 'null'; |
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} |
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} |
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/** |
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* Set the literal value. |
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* |
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* @param string $value The new value to set. |
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* @param string $driver The name of the database driver to set the value for. |
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* @return Literal Returns $this for fluent calls. |
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*/ |
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public function setValue($value, $driver = 'default') { |
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$driver = $this->normalizeKey($driver); |
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$this->driverValues[$driver] = $value; |
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return $this; |
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} |
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/** |
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* Normalize the driver name for the drivers array. |
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* |
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* @param string $key The name of the driver. |
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* @return string Returns the driver name normalized. |
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*/ |
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protected function normalizeKey($key) { |
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return rtrim_substr(strtolower(basename($key)), 'db'); |
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} |
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/** |
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* Create and return a {@link Literal} object. |
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* |
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* @param string|array $value The literal value(s) as passed to {@link Literal::__construct()}. |
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* @return Literal Thew new literal value. |
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*/ |
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public static function value($value) { |
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$literal = new Literal($value); |
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return $literal; |
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} |
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/** |
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* Creat and return a {@link Literal} object that will query the current unix timesatmp. |
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* |
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* @return Literal Returns the timestamp expression. |
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*/ |
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public static function timestamp() { |
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$literal = new Literal([ |
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'mysql' => 'unix_timestamp()', |
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'sqlite' => "date('now', 'unixepoch')", |
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'posgresql' => 'extract(epoch from now())', |
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'default' => time() |
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]); |
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return $literal; |
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} |
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} |
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vanilla /
garden
