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<?php |
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/** |
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* webtrees: online genealogy |
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* Copyright (C) 2021 webtrees development team |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <https://www.gnu.org/licenses/>. |
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*/ |
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declare(strict_types=1); |
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namespace Fisharebest\Webtrees\Elements; |
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use function mb_strlen; |
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use function mb_strtolower; |
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use function mb_strtoupper; |
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use function mb_substr; |
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/** |
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* @see https://en.wikipedia.org/wiki/Maidenhead_Locator_System |
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*/ |
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class MaidenheadLocator extends AbstractElement |
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{ |
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protected const MAXIMUM_LENGTH = 8; |
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protected const PATTERN = '[A-Ra-r][A-Ra-r]([0-9][0-9]([A-Xa-x][A-Xa-x]([0-9][0-9])?)?)?'; |
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/** |
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* Convert a value to a canonical form. |
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* |
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* @param string $value |
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* |
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* @return string |
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*/ |
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public function canonical(string $value): string |
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{ |
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$value = parent::canonical($value); |
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// Characters 1 and 2 are upper case |
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if (mb_strlen($value) >= 2) { |
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$value = mb_strtoupper(mb_substr($value, 0, 2)) . mb_substr($value, 2); |
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} |
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// Characters 5 and 6 are lower case |
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if (mb_strlen($value) >= 6) { |
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$value = mb_substr($value, 0, 4) . mb_strtolower(mb_substr($value, 4, 2)) . mb_substr($value, 6); |
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} |
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return $value; |
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} |
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} |
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fisharebest /
webtrees
