xref: /webtrees/app/Module/LanguageDutch.php (revision b11cdcd45131b1585d66693fab363cfeb18c51a4) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * 'Copyright (C) 2023 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees\Module;
21
22use Fisharebest\Localization\Locale\LocaleInterface;
23use Fisharebest\Localization\Locale\LocaleNl;
24use Fisharebest\Webtrees\Encodings\UTF8;
25
26use function mb_substr;
27use function str_starts_with;
28
29/**
30 * Class LanguageDutch.
31 */
32class LanguageDutch extends AbstractModule implements ModuleLanguageInterface
33{
34    use ModuleLanguageTrait;
35
36    /**
37     * Phone-book ordering of letters.
38     *
39     * @return array<int,string>
40     */
41    public function alphabet(): array
42    {
43        return [
44            'A',
45            'B',
46            'C',
47            'D',
48            'E',
49            'F',
50            'G',
51            'H',
52            'I',
53            'J',
54            'K',
55            'L',
56            'M',
57            'N',
58            'O',
59            'P',
60            'Q',
61            'R',
62            'S',
63            'T',
64            'U',
65            'V',
66            'W',
67            'X',
68            'Y',
69            'Z',
70            'IJ',
71        ];
72    }
73
74    /**
75     * Some languages use digraphs and trigraphs.
76     *
77     * @param string $string
78     *
79     * @return string
80     */
81    public function initialLetter(string $string): string
82    {
83        if (str_starts_with($string, 'IJ')) {
84            return 'IJ';
85        }
86
87        return mb_substr($string, 0, 1);
88    }
89
90    /**
91     * @return LocaleInterface
92     */
93    public function locale(): LocaleInterface
94    {
95        return new LocaleNl();
96    }
97
98    /**
99     * Letters with diacritics that are considered distinct letters in this language.
100     *
101     * @return array<string,string>
102     */
103    protected function normalizeExceptions(): array
104    {
105        return [
106            'IJ' => UTF8::LATIN_CAPITAL_LIGATURE_IJ,
107            'Ij' => UTF8::LATIN_CAPITAL_LIGATURE_IJ,
108            'ij' => UTF8::LATIN_SMALL_LIGATURE_IJ,
109            'iJ' => UTF8::LATIN_SMALL_LIGATURE_IJ,
110        ];
111    }
112}
113