2022-05-17 23:27:40 +02:00
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<?PHP
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/**
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* Contains class NodaValidationHelper.
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*
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* @author Joshua Ramon Enslin <joshua@museum-digital.de>
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*/
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declare(strict_types = 1);
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/**
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* A class of static functions for validating single fields of noda entities.
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*/
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final class NodaValidationHelper {
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const ACTOR_DESCRIPTION_REQUIRED_DISTINCT_CHARS = 2;
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/**
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* Validates an actor description for completeness. Of course, only an informed
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* guess based on the length and character composition of the description can be
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* made.
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*
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* @param string $description Input descrition.
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* @param string[] $names Names of the actor. Optional. Setting this enables
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* checks e.g. to prevent duplicating the actor name
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* as a description.
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*
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* @return void
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*/
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public static function validateActorDescription(string $description, array $names = []):void {
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2022-05-26 18:02:05 +02:00
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// For nodac, empty actor descriptions are to be allowed. Thus, a
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// dedicated check for fully empty ones with a dedicated exception
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// is needed.
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if (empty($description)) {
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throw new MDInvalidEmptyInputException("No author name is provided");
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}
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2022-05-17 23:27:40 +02:00
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// Throw error on descriptions that are too short
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if (\mb_strlen($description) < 10) {
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throw new MDgenericInvalidInputsException("Author description is too short");
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}
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// Validate actor description based on character composition.
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$chars = \str_split($description);
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$uniqueChars = array_unique($chars);
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if (count($uniqueChars) <= self::ACTOR_DESCRIPTION_REQUIRED_DISTINCT_CHARS) {
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throw new MDgenericInvalidInputsException("There need to be more than " . self::ACTOR_DESCRIPTION_REQUIRED_DISTINCT_CHARS . " distinct characters.");
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}
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if (!empty($names)) {
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$clearedChars = [' ' => ' ', ',' => ' ', ';' => ' ', '.' => ' '];
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$namesMerged = implode(' ', $names);
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$namesMerged = strtr($namesMerged, $clearedChars);
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$uniqueNames = array_unique(array_diff(explode(' ', $namesMerged), ['']));
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sort($uniqueNames);
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$descCleared = strtr($description, $clearedChars);
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$descWords = array_unique(array_diff(explode(' ', $descCleared), ['']));
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sort($descWords);
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if ($uniqueNames === $descWords) {
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throw new MDgenericInvalidInputsException("The actor name was simply repeated in the description. This is not enough.");
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}
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}
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}
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}
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