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<?php |
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namespace FilmTools\Developing; |
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use FilmTools\Commons\Zones; |
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use FilmTools\Commons\FStops; |
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use FilmTools\Commons\Exposures; |
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use FilmTools\Commons\ExposuresProviderInterface; |
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use FilmTools\Commons\Densities; |
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use FilmTools\Commons\DensitiesProviderInterface; |
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class DevelopingFactory |
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{ |
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/** |
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* PHP class name (FQDN) of the DevelopingInterface instance this factory produces. |
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* |
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* @var string |
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*/ |
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public $developing_php_class; |
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/** |
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* Field names that may contain density values. |
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* (Sort order from "most" to "least" specific) |
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* |
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* @var array |
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*/ |
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public $density_fields = array("logD", "density", "densities"); |
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/** |
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* Field names that may contain exposures values. |
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* (Sort order from "most" to "least" specific) |
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* |
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* @var array |
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*/ |
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public $exposure_fields = array("logH", "exposure", "exposures"); |
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/** |
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* @param string|null $developing_php_class DevelopingInterface instance FQDN |
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* |
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* @throws InvalidArgumentException If FQDN does not implement DevelopingInterface |
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*/ |
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public function __construct( string $developing_php_class = null ) |
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{ |
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$this->developing_php_class = $developing_php_class ?: Developing::class; |
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if (!is_subclass_of($this->developing_php_class, DevelopingInterface::class )): |
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$msg = sprintf("Class name must implement '%s'.", DevelopingInterface::class); |
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throw new DevelopingInvalidArgumentException( $msg ); |
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endif; |
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} |
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/** |
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* The factory method. |
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* |
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* Expects an array or ArrayAccess with at least elements "time", "densities", and "exposures". |
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* |
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* If no "exposures" are given, but "zones" numbers are instead, the zone numbers |
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* will be converted internally. |
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* |
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* @param array|ArrayAccess $developing |
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* @return DevelopingInterface |
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*/ |
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public function __invoke( $developing ) : DevelopingInterface |
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{ |
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if (!is_array($developing) and !$developing instanceOf \ArrayAccess) |
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throw new DevelopingInvalidArgumentException("Array or ArrayAccess expected"); |
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$densities = $this->extractDensities($developing); |
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$exposures = $this->extractExposures($developing); |
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$time = $this->extractTime($developing); |
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$developing_php_class = $this->developing_php_class; |
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return new $developing_php_class( $exposures, $densities, $time ); |
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} |
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protected function extractDensities( $developing ) : DensitiesProviderInterface |
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{ |
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$density_fields = $this->density_fields; |
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$densities = array(); |
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while (($field = array_shift($density_fields)) and empty($densities)): |
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$densities = $developing[ $field ] ?? array(); |
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endwhile; |
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return new Densities($densities); |
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} |
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protected function extractExposures( $developing ) : ExposuresProviderInterface |
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{ |
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$exposure_fields = $this->exposure_fields; |
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$exposures = array(); |
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while (($field = array_shift($exposure_fields)) and empty($exposures)): |
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$exposures = $developing[ $field ] ?? array(); |
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endwhile; |
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if (!empty($exposures)): |
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return new Exposures( $exposures ); |
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endif; |
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// So if "exposures" are empty, try to make some |
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// using fstops and zone numbers |
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$fstops = ($developing['fstop'] ?? array()) ?: $developing['fstops'] ?? array(); |
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$zones = ($developing['zone'] ?? array()) ?: $developing['zones'] ?? array(); |
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if (empty($exposures) and !empty($zones)): |
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$exposures = new Zones( $zones ); |
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elseif (empty($exposures) and !empty($fstops)): |
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$exposures = new FStops( $fstops ); |
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else: |
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// Found nothing, give up |
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$exposures = new Exposures( array() ); |
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endif; |
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return $exposures; |
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} |
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protected function extractTime( $developing ) : int |
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{ |
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if (!array_key_exists("time", $developing) |
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and !array_key_exists("seconds", $developing)) |
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throw new NoTimeGivenException("The data array must contain either 'time' or 'seconds' element."); |
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if (empty($time = $developing['seconds'] ?? false) |
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and empty($time = $developing['time'] ?? false)): |
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throw new NoTimeGivenException("At least one element in 'seconds' or 'time' expected"); |
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endif; |
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// Remove surfluous time values |
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if (is_array($time)): |
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$time = array_unique($time); |
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$count_times = count($time); |
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if ($count_times > 1): |
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$msg = sprintf("There must only be one developing time, %s given", $count_times); |
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throw new NoTimeGivenException($msg); |
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endif; |
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$time = array_shift($time); |
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endif; |
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if (filter_var($time, \FILTER_VALIDATE_INT, ['options' => array( 'min_range' => 0 )]) === false) |
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throw new NoTimeGivenException("The developing time must be integer (positive or 0)."); |
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return $time; |
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} |
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} |
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filmtools /
developing
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