I18N::languageTag() - Code Metrics - Inspection of "Remove global constant WT_LOCALE and store LocaleI..." - fisharebest/webtrees - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 062e72...90a2f7 )

by Greg

created 2019-10-26 06:37 UTC

I18N::languageTag() A

↳ Parent: I18N

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
eloc	1
nc	1
nop	0
dl	0
loc	3
rs	10
c	0
b	0
f	0

<?php

/**
 * webtrees: online genealogy
 * Copyright (C) 2019 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

declare(strict_types=1);

namespace Fisharebest\Webtrees;

use Collator;
use Exception;
use Fisharebest\Localization\Locale;
use Fisharebest\Localization\Locale\LocaleEnUs;
use Fisharebest\Localization\Locale\LocaleInterface;
use Fisharebest\Localization\Translation;
use Fisharebest\Localization\Translator;
use Fisharebest\Webtrees\Module\ModuleCustomInterface;
use Fisharebest\Webtrees\Module\ModuleLanguageInterface;
use Fisharebest\Webtrees\Services\ModuleService;
use Illuminate\Support\Collection;

use function array_merge;
use function class_exists;
use function html_entity_decode;
use function in_array;
use function mb_strtolower;
use function mb_strtoupper;
use function mb_substr;
use function ord;
use function sprintf;
use function str_replace;
use function strcmp;
use function strip_tags;
use function strlen;
use function strpos;
use function strtr;

/**
 * Internationalization (i18n) and localization (l10n).
 */
class I18N
{
    // MO files use special characters for plurals and context.
    public const PLURAL  = "\x00";
    public const CONTEXT = "\x04";
    private const DIGITS = '0123456789٠١٢٣٤٥٦٧٨٩۰۱۲۳۴۵۶۷۸۹';
    private const DOTLESS_I_LOCALES = [
        'az',
        'tr',
    ];
    private const DOTLESS_I_TOLOWER = [
        'I' => 'ı',
        'İ' => 'i',
    ];

    // Digits are always rendered LTR, even in RTL text.
    private const DOTLESS_I_TOUPPER = [
        'ı' => 'I',
        'i' => 'İ',
    ];

    // These locales need special handling for the dotless letter I.
    private const SCRIPT_CHARACTER_RANGES = [
        [
            'Latn',
            0x0041,
            0x005A,
        ],
        [
            'Latn',
            0x0061,
            0x007A,
        ],
        [
            'Latn',
            0x0100,
            0x02AF,
        ],
        [
            'Grek',
            0x0370,
            0x03FF,
        ],
        [
            'Cyrl',
            0x0400,
            0x052F,
        ],
        [
            'Hebr',
            0x0590,
            0x05FF,
        ],
        [
            'Arab',
            0x0600,
            0x06FF,
        ],
        [
            'Arab',
            0x0750,
            0x077F,
        ],
        [
            'Arab',
            0x08A0,
            0x08FF,
        ],
        [
            'Deva',
            0x0900,
            0x097F,
        ],
        [
            'Taml',
            0x0B80,
            0x0BFF,
        ],
        [
            'Sinh',
            0x0D80,
            0x0DFF,
        ],
        [
            'Thai',
            0x0E00,
            0x0E7F,
        ],
        [
            'Geor',
            0x10A0,
            0x10FF,
        ],
        [
            'Grek',
            0x1F00,
            0x1FFF,
        ],
        [
            'Deva',
            0xA8E0,
            0xA8FF,
        ],
        [
            'Hans',
            0x3000,
            0x303F,
        ],
        // Mixed CJK, not just Hans
        [
            'Hans',
            0x3400,
            0xFAFF,
        ],
        // Mixed CJK, not just Hans
        [
            'Hans',
            0x20000,
            0x2FA1F,
        ],
        // Mixed CJK, not just Hans
    ];
    private const MIRROR_CHARACTERS = [
        '('  => ')',
        ')'  => '(',
        '['  => ']',
        ']'  => '[',
        '{'  => '}',
        '}'  => '{',
        '<'  => '>',
        '>'  => '<',
        '‹ ' => '›',
        '› ' => '‹',
        '«'  => '»',
        '»'  => '«',
        '﴾ ' => '﴿',
        '﴿ ' => '﴾',
        '“ ' => '”',
        '” ' => '“',
        '‘ ' => '’',
        '’ ' => '‘',
    ];
    /** @var string Punctuation used to separate list items, typically a comma */
    public static $list_separator;

    // The ranges of characters used by each script.
    /** @var LocaleInterface The current locale (e.g. LocaleEnGb) */
    private static $locale;

    // Characters that are displayed in mirror form in RTL text.
    /** @var Translator An object that performs translation */
    private static $translator;
    /** @var  Collator|null From the php-intl library */
    private static $collator;

    /**
     * The preferred locales for this site, or a default list if no preference.
     *
     * @return LocaleInterface[]
     */
    public static function activeLocales(): array
    {
        /** @var Collection $locales */
        $locales = app(ModuleService::class)
            ->findByInterface(ModuleLanguageInterface::class, false, true)
            ->map(static function (ModuleLanguageInterface $module): LocaleInterface {
                return $module->locale();
            });

        if ($locales->isEmpty()) {
            return [new LocaleEnUs()];
        }

        return $locales->all();
    }

    /**
     * Which MySQL collation should be used for this locale?
     *
     * @return string
     */
    public static function collation(): string
    {
        $collation = self::$locale->collation();
        switch ($collation) {
            case 'croatian_ci':
            case 'german2_ci':
            case 'vietnamese_ci':
                // Only available in MySQL 5.6
                return 'utf8_unicode_ci';
            default:
                return 'utf8_' . $collation;
        }
    }

    /**
     * What format is used to display dates in the current locale?
     *
     * @return string
     */
    public static function dateFormat(): string
    {
        /* I18N: This is the format string for full dates. See http://php.net/date for codes */
        return self::$translator->translate('%j %F %Y');
    }

    /**
     * Convert the digits 0-9 into the local script
     * Used for years, etc., where we do not want thousands-separators, decimals, etc.
     *
     * @param string|int $n
     *
     * @return string
     */
    public static function digits($n): string
    {
        return self::$locale->digits((string) $n);
    }

    /**
     * What is the direction of the current locale
     *
     * @return string "ltr" or "rtl"
     */
    public static function direction(): string
    {
        return self::$locale->direction();
    }

    /**
     * What is the first day of the week.
     *
     * @return int Sunday=0, Monday=1, etc.
     */
    public static function firstDay(): int
    {
        return self::$locale->territory()->firstDay();
    }

    /**
     * Generate i18n markup for the <html> tag, e.g. lang="ar" dir="rtl"
     *
     * @return string
     */
    public static function htmlAttributes(): string
    {
        return self::$locale->htmlAttributes();
    }

    /**
     * Initialise the translation adapter with a locale setting.
     *
     * @param string    $code  Use this locale/language code, or choose one automatically
     * @param Tree|null $tree
     * @param bool      $setup During setup, we cannot access the database.
     *
     * @return string $string
     */
    public static function init(string $code = '', Tree $tree = null, $setup = false): string
    {
        if ($code !== '') {
            // Create the specified locale
            self::$locale = Locale::create($code);
        } elseif (Session::has('language')) {
            // Select a previously used locale
            self::$locale = Locale::create(Session::get('language'));
        } else {
            if ($tree instanceof Tree) {
                $default_locale = Locale::create($tree->getPreference('LANGUAGE', 'en-US'));
            } else {
                $default_locale = new LocaleEnUs();
            }

            // Negotiate with the browser.
            // Search engines don't negotiate.  They get the default locale of the tree.
            if ($setup) {
                $installed_locales = app(ModuleService::class)->setupLanguages()
                    ->map(static function (ModuleLanguageInterface $module): LocaleInterface {
                        return $module->locale();
                    });
            } else {
                $installed_locales = self::installedLocales();
            }

            self::$locale = Locale::httpAcceptLanguage($_SERVER, $installed_locales->all(), $default_locale);
        }

        // Load the translation file
        $translation_file = Webtrees::ROOT_DIR . 'resources/lang/' . self::$locale->languageTag() . '/messages.php';

        try {
            $translation  = new Translation($translation_file);
            $translations = $translation->asArray();
        } catch (Exception $ex) {
            // The translations files are created during the build process, and are
            // not included in the source code.
            // Assuming we are using dev code, and build (or rebuild) the files.
            $po_file      = Webtrees::ROOT_DIR . 'resources/lang/' . self::$locale->languageTag() . '/messages.po';
            $translation  = new Translation($po_file);
            $translations = $translation->asArray();
            file_put_contents($translation_file, '<?php return ' . var_export($translations, true) . ';');
        }

        // Add translations from custom modules (but not during setup, as we have no database/modules)
        if (!$setup) {
            $translations = app(ModuleService::class)
                ->findByInterface(ModuleCustomInterface::class)
                ->reduce(static function (array $carry, ModuleCustomInterface $item): array {
                    return array_merge($carry, $item->customTranslations(self::$locale->languageTag()));
                }, $translations);
        }

        // Create a translator
        self::$translator = new Translator($translations, self::$locale->pluralRule());

        /* I18N: This punctuation is used to separate lists of items */
        self::$list_separator = self::translate(', ');

        // Create a collator
        try {
            if (class_exists('Collator')) {
                // Symfony provides a very incomplete polyfill - which cannot be used.
                self::$collator = new Collator(self::$locale->code());
                // Ignore upper/lower case differences
                self::$collator->setStrength(Collator::SECONDARY);
            }
        } catch (Exception $ex) {
            // PHP-INTL is not installed?  We'll use a fallback later.
            self::$collator = null;
        }

        return self::$locale->languageTag();
    }

    /**
     * All locales for which a translation file exists.
     *
     * @return Collection
     */
    public static function installedLocales(): Collection
    {
        return app(ModuleService::class)
            ->findByInterface(ModuleLanguageInterface::class, true)
            ->map(static function (ModuleLanguageInterface $module): LocaleInterface {
                return $module->locale();
            });
    }

    /**
     * Translate a string, and then substitute placeholders
     * echo I18N::translate('Hello World!');
     * echo I18N::translate('The %s sat on the mat', 'cat');
     *
     * @param string $message
     * @param string ...$args
     *
     * @return string
     */
    public static function translate(string $message, ...$args): string
    {
        $message = self::$translator->translate($message);

        return sprintf($message, ...$args);
    }

    /**
     * Return the endonym for a given language - as per http://cldr.unicode.org/
     *
     * @param string $locale
     *
     * @return string
     */
    public static function languageName(string $locale): string
    {
        return Locale::create($locale)->endonym();
    }

    /**
     * @return string
     */
    public static function languageTag(): string
    {
        return self::$locale->languageTag();
    }

    /**
     * Return the script used by a given language
     *
     * @param string $locale
     *
     * @return string
     */
    public static function languageScript(string $locale): string
    {
        return Locale::create($locale)->script()->code();
    }

    /**
     * Translate a number into the local representation.
     * e.g. 12345.67 becomes
     * en: 12,345.67
     * fr: 12 345,67
     * de: 12.345,67
     *
     * @param float $n
     * @param int   $precision
     *
     * @return string
     */
    public static function number(float $n, int $precision = 0): string
    {
        return self::$locale->number(round($n, $precision));
    }

    /**
     * Translate a fraction into a percentage.
     * e.g. 0.123 becomes
     * en: 12.3%
     * fr: 12,3 %
     * de: 12,3%
     *
     * @param float $n
     * @param int   $precision
     *
     * @return string
     */
    public static function percentage(float $n, int $precision = 0): string
    {
        return self::$locale->percent(round($n, $precision + 2));
    }

    /**
     * Translate a plural string
     * echo self::plural('There is an error', 'There are errors', $num_errors);
     * echo self::plural('There is one error', 'There are %s errors', $num_errors);
     * echo self::plural('There is %1$s %2$s cat', 'There are %1$s %2$s cats', $num, $num, $colour);
     *
     * @param string $singular
     * @param string $plural
     * @param int    $count
     * @param string ...$args
     *
     * @return string
     */
    public static function plural(string $singular, string $plural, int $count, ...$args): string
    {
        $message = self::$translator->translatePlural($singular, $plural, $count);

        return sprintf($message, ...$args);
    }

    /**
     * UTF8 version of PHP::strrev()
     * Reverse RTL text for third-party libraries such as GD2 and googlechart.
     * These do not support UTF8 text direction, so we must mimic it for them.
     * Numbers are always rendered LTR, even in RTL text.
     * The visual direction of characters such as parentheses should be reversed.
     *
     * @param string $text Text to be reversed
     *
     * @return string
     */
    public static function reverseText($text): string
    {
        // Remove HTML markup - we can't display it and it is LTR.
        $text = strip_tags($text);
        // Remove HTML entities.
        $text = html_entity_decode($text, ENT_QUOTES, 'UTF-8');

        // LTR text doesn't need reversing
        if (self::scriptDirection(self::textScript($text)) === 'ltr') {
            return $text;
        }

        // Mirrored characters
        $text = strtr($text, self::MIRROR_CHARACTERS);

        $reversed = '';
        $digits   = '';
        while ($text !== '') {
            $letter = mb_substr($text, 0, 1);
            $text   = mb_substr($text, 1);
            if (strpos(self::DIGITS, $letter) !== false) {
                $digits .= $letter;
            } else {
                $reversed = $letter . $digits . $reversed;
                $digits   = '';
            }
        }

        return $digits . $reversed;
    }

    /**
     * Return the direction (ltr or rtl) for a given script
     * The PHP/intl library does not provde this information, so we need
     * our own lookup table.
     *
     * @param string $script
     *
     * @return string
     */
    public static function scriptDirection($script): string
    {
        switch ($script) {
            case 'Arab':
            case 'Hebr':
            case 'Mong':
            case 'Thaa':
                return 'rtl';
            default:
                return 'ltr';
        }
    }

    /**
     * Identify the script used for a piece of text
     *
     * @param string $string
     *
     * @return string
     */
    public static function textScript($string): string
    {
        $string = strip_tags($string); // otherwise HTML tags show up as latin
        $string = html_entity_decode($string, ENT_QUOTES, 'UTF-8'); // otherwise HTML entities show up as latin
        $string = str_replace([
            '@N.N.',
            '@P.N.',
        ], '', $string); // otherwise unknown names show up as latin
        $pos    = 0;
        $strlen = strlen($string);
        while ($pos < $strlen) {
            // get the Unicode Code Point for the character at position $pos
            $byte1 = ord($string[$pos]);
            if ($byte1 < 0x80) {
                $code_point = $byte1;
                $chrlen     = 1;
            } elseif ($byte1 < 0xC0) {
                // Invalid continuation character
                return 'Latn';
            } elseif ($byte1 < 0xE0) {
                $code_point = (($byte1 & 0x1F) << 6) + (ord($string[$pos + 1]) & 0x3F);
                $chrlen     = 2;
            } elseif ($byte1 < 0xF0) {
                $code_point = (($byte1 & 0x0F) << 12) + ((ord($string[$pos + 1]) & 0x3F) << 6) + (ord($string[$pos + 2]) & 0x3F);
                $chrlen     = 3;
            } elseif ($byte1 < 0xF8) {
                $code_point = (($byte1 & 0x07) << 24) + ((ord($string[$pos + 1]) & 0x3F) << 12) + ((ord($string[$pos + 2]) & 0x3F) << 6) + (ord($string[$pos + 3]) & 0x3F);
                $chrlen     = 3;
            } else {
                // Invalid UTF
                return 'Latn';
            }

            foreach (self::SCRIPT_CHARACTER_RANGES as $range) {
                if ($code_point >= $range[1] && $code_point <= $range[2]) {
                    return $range[0];
                }
            }
            // Not a recognised script. Maybe punctuation, spacing, etc. Keep looking.
            $pos += $chrlen;
        }

        return 'Latn';
    }

    /**
     * Perform a case-insensitive comparison of two strings.
     *
     * @param string $string1
     * @param string $string2
     *
     * @return int
     */
    public static function strcasecmp($string1, $string2): int
    {
        if (self::$collator instanceof Collator) {
            return self::$collator->compare($string1, $string2);
        }

        return strcmp(self::strtolower($string1), self::strtolower($string2));
    }

    /**
     * Convert a string to lower case.
     *
     * @param string $string
     *
     * @return string
     */
    public static function strtolower($string): string
    {
        if (in_array(self::$locale->language()->code(), self::DOTLESS_I_LOCALES, true)) {
            $string = strtr($string, self::DOTLESS_I_TOLOWER);
        }

        return mb_strtolower($string);
    }

    /**
     * Convert a string to upper case.
     *
     * @param string $string
     *
     * @return string
     */
    public static function strtoupper($string): string
    {
        if (in_array(self::$locale->language()->code(), self::DOTLESS_I_LOCALES, true)) {
            $string = strtr($string, self::DOTLESS_I_TOUPPER);
        }

        return mb_strtoupper($string);
    }

    /**
     * What format is used to display dates in the current locale?
     *
     * @return string
     */
    public static function timeFormat(): string
    {
        /* I18N: This is the format string for the time-of-day. See http://php.net/date for codes */
        return self::$translator->translate('%H:%i:%s');
    }

    /**
     * Context sensitive version of translate.
     * echo I18N::translateContext('NOMINATIVE', 'January');
     * echo I18N::translateContext('GENITIVE', 'January');
     *
     * @param string $context
     * @param string $message
     * @param string ...$args
     *
     * @return string
     */
    public static function translateContext(string $context, string $message, ...$args): string
    {
        $message = self::$translator->translateContext($context, $message);

        return sprintf($message, ...$args);
    }
}


1			<?php
2
3			/**
4			* webtrees: online genealogy
5			* Copyright (C) 2019 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 <http://www.gnu.org/licenses/>.
16			*/
17
18			declare(strict_types=1);
19
20			namespace Fisharebest\Webtrees;
21
22			use Collator;
23			use Exception;
24			use Fisharebest\Localization\Locale;
25			use Fisharebest\Localization\Locale\LocaleEnUs;
26			use Fisharebest\Localization\Locale\LocaleInterface;
27			use Fisharebest\Localization\Translation;
28			use Fisharebest\Localization\Translator;
29			use Fisharebest\Webtrees\Module\ModuleCustomInterface;
30			use Fisharebest\Webtrees\Module\ModuleLanguageInterface;
31			use Fisharebest\Webtrees\Services\ModuleService;
32			use Illuminate\Support\Collection;
33
34			use function array_merge;
35			use function class_exists;
36			use function html_entity_decode;
37			use function in_array;
38			use function mb_strtolower;
39			use function mb_strtoupper;
40			use function mb_substr;
41			use function ord;
42			use function sprintf;
43			use function str_replace;
44			use function strcmp;
45			use function strip_tags;
46			use function strlen;
47			use function strpos;
48			use function strtr;
49
50			/**
51			* Internationalization (i18n) and localization (l10n).
52			*/
53			class I18N
54			{
55			// MO files use special characters for plurals and context.
56			public const PLURAL = "\x00";
57			public const CONTEXT = "\x04";
58			private const DIGITS = '0123456789٠١٢٣٤٥٦٧٨٩۰۱۲۳۴۵۶۷۸۹';
59			private const DOTLESS_I_LOCALES = [
60			'az',
61			'tr',
62			];
63			private const DOTLESS_I_TOLOWER = [
64			'I' => 'ı',
65			'İ' => 'i',
66			];
67
68			// Digits are always rendered LTR, even in RTL text.
69			private const DOTLESS_I_TOUPPER = [
70			'ı' => 'I',
71			'i' => 'İ',
72			];
73
74			// These locales need special handling for the dotless letter I.
75			private const SCRIPT_CHARACTER_RANGES = [
76			[
77			'Latn',
78			0x0041,
79			0x005A,
80			],
81			[
82			'Latn',
83			0x0061,
84			0x007A,
85			],
86			[
87			'Latn',
88			0x0100,
89			0x02AF,
90			],
91			[
92			'Grek',
93			0x0370,
94			0x03FF,
95			],
96			[
97			'Cyrl',
98			0x0400,
99			0x052F,
100			],
101			[
102			'Hebr',
103			0x0590,
104			0x05FF,
105			],
106			[
107			'Arab',
108			0x0600,
109			0x06FF,
110			],
111			[
112			'Arab',
113			0x0750,
114			0x077F,
115			],
116			[
117			'Arab',
118			0x08A0,
119			0x08FF,
120			],
121			[
122			'Deva',
123			0x0900,
124			0x097F,
125			],
126			[
127			'Taml',
128			0x0B80,
129			0x0BFF,
130			],
131			[
132			'Sinh',
133			0x0D80,
134			0x0DFF,
135			],
136			[
137			'Thai',
138			0x0E00,
139			0x0E7F,
140			],
141			[
142			'Geor',
143			0x10A0,
144			0x10FF,
145			],
146			[
147			'Grek',
148			0x1F00,
149			0x1FFF,
150			],
151			[
152			'Deva',
153			0xA8E0,
154			0xA8FF,
155			],
156			[
157			'Hans',
158			0x3000,
159			0x303F,
160			],
161			// Mixed CJK, not just Hans
162			[
163			'Hans',
164			0x3400,
165			0xFAFF,
166			],
167			// Mixed CJK, not just Hans
168			[
169			'Hans',
170			0x20000,
171			0x2FA1F,
172			],
173			// Mixed CJK, not just Hans
174			];
175			private const MIRROR_CHARACTERS = [
176			'(' => ')',
177			')' => '(',
178			'[' => ']',
179			']' => '[',
180			'{' => '}',
181			'}' => '{',
182			'<' => '>',
183			'>' => '<',
184			'‹ ' => '›',
185			'› ' => '‹',
186			'«' => '»',
187			'»' => '«',
188			'﴾ ' => '﴿',
189			'﴿ ' => '﴾',
190			'“ ' => '”',
191			'” ' => '“',
192			'‘ ' => '’',
193			'’ ' => '‘',
194			];
195			/** @var string Punctuation used to separate list items, typically a comma */
196			public static $list_separator;
197
198			// The ranges of characters used by each script.
199			/** @var LocaleInterface The current locale (e.g. LocaleEnGb) */
200			private static $locale;
201
202			// Characters that are displayed in mirror form in RTL text.
203			/** @var Translator An object that performs translation */
204			private static $translator;
205			/** @var Collator\|null From the php-intl library */
206			private static $collator;
207
208			/**
209			* The preferred locales for this site, or a default list if no preference.
210			*
211			* @return LocaleInterface[]
212			*/
213			public static function activeLocales(): array
214			{
215			/** @var Collection $locales */
216			$locales = app(ModuleService::class)
217			->findByInterface(ModuleLanguageInterface::class, false, true)
218			->map(static function (ModuleLanguageInterface $module): LocaleInterface {
219			return $module->locale();
220			});
221
222			if ($locales->isEmpty()) {
223			return [new LocaleEnUs()];
224			}
225
226			return $locales->all();
227			}
228
229			/**
230			* Which MySQL collation should be used for this locale?
231			*
232			* @return string
233			*/
234			public static function collation(): string
235			{
236			$collation = self::$locale->collation();
237			switch ($collation) {
238			case 'croatian_ci':
239			case 'german2_ci':
240			case 'vietnamese_ci':
241			// Only available in MySQL 5.6
242			return 'utf8_unicode_ci';
243			default:
244			return 'utf8_' . $collation;
245			}
246			}
247
248			/**
249			* What format is used to display dates in the current locale?
250			*
251			* @return string
252			*/
253			public static function dateFormat(): string
254			{
255			/* I18N: This is the format string for full dates. See http://php.net/date for codes */
256			return self::$translator->translate('%j %F %Y');
257			}
258
259			/**
260			* Convert the digits 0-9 into the local script
261			* Used for years, etc., where we do not want thousands-separators, decimals, etc.
262			*
263			* @param string\|int $n
264			*
265			* @return string
266			*/
267			public static function digits($n): string
268			{
269			return self::$locale->digits((string) $n);
270			}
271
272			/**
273			* What is the direction of the current locale
274			*
275			* @return string "ltr" or "rtl"
276			*/
277			public static function direction(): string
278			{
279			return self::$locale->direction();
280			}
281
282			/**
283			* What is the first day of the week.
284			*
285			* @return int Sunday=0, Monday=1, etc.
286			*/
287			public static function firstDay(): int
288			{
289			return self::$locale->territory()->firstDay();
290			}
291
292			/**
293			* Generate i18n markup for the <html> tag, e.g. lang="ar" dir="rtl"
294			*
295			* @return string
296			*/
297			public static function htmlAttributes(): string
298			{
299			return self::$locale->htmlAttributes();
300			}
301
302			/**
303			* Initialise the translation adapter with a locale setting.
304			*
305			* @param string $code Use this locale/language code, or choose one automatically
306			* @param Tree\|null $tree
307			* @param bool $setup During setup, we cannot access the database.
308			*
309			* @return string $string
310			*/
311			public static function init(string $code = '', Tree $tree = null, $setup = false): string
312			{
313			if ($code !== '') {
314			// Create the specified locale
315			self::$locale = Locale::create($code);
316			} elseif (Session::has('language')) {
317			// Select a previously used locale
318			self::$locale = Locale::create(Session::get('language'));
319			} else {
320			if ($tree instanceof Tree) {
321			$default_locale = Locale::create($tree->getPreference('LANGUAGE', 'en-US'));
322			} else {
323			$default_locale = new LocaleEnUs();
324			}
325
326			// Negotiate with the browser.
327			// Search engines don't negotiate. They get the default locale of the tree.
328			if ($setup) {
329			$installed_locales = app(ModuleService::class)->setupLanguages()
330			->map(static function (ModuleLanguageInterface $module): LocaleInterface {
331			return $module->locale();
332			});
333			} else {
334			$installed_locales = self::installedLocales();
335			}
336
337			self::$locale = Locale::httpAcceptLanguage($_SERVER, $installed_locales->all(), $default_locale);
338			}
339
340			// Load the translation file
341			$translation_file = Webtrees::ROOT_DIR . 'resources/lang/' . self::$locale->languageTag() . '/messages.php';
342
343			try {
344			$translation = new Translation($translation_file);
345			$translations = $translation->asArray();
346			} catch (Exception $ex) {
347			// The translations files are created during the build process, and are
348			// not included in the source code.
349			// Assuming we are using dev code, and build (or rebuild) the files.
350			$po_file = Webtrees::ROOT_DIR . 'resources/lang/' . self::$locale->languageTag() . '/messages.po';
351			$translation = new Translation($po_file);
352			$translations = $translation->asArray();
353			file_put_contents($translation_file, '<?php return ' . var_export($translations, true) . ';');
354			}
355
356			// Add translations from custom modules (but not during setup, as we have no database/modules)
357			if (!$setup) {
358			$translations = app(ModuleService::class)
359			->findByInterface(ModuleCustomInterface::class)
360			->reduce(static function (array $carry, ModuleCustomInterface $item): array {
361			return array_merge($carry, $item->customTranslations(self::$locale->languageTag()));
362			}, $translations);
363			}
364
365			// Create a translator
366			self::$translator = new Translator($translations, self::$locale->pluralRule());
367
368			/* I18N: This punctuation is used to separate lists of items */
369			self::$list_separator = self::translate(', ');
370
371			// Create a collator
372			try {
373			if (class_exists('Collator')) {
374			// Symfony provides a very incomplete polyfill - which cannot be used.
375			self::$collator = new Collator(self::$locale->code());
376			// Ignore upper/lower case differences
377			self::$collator->setStrength(Collator::SECONDARY);
378			}
379			} catch (Exception $ex) {
380			// PHP-INTL is not installed? We'll use a fallback later.
381			self::$collator = null;
382			}
383
384			return self::$locale->languageTag();
385			}
386
387			/**
388			* All locales for which a translation file exists.
389			*
390			* @return Collection
391			*/
392			public static function installedLocales(): Collection
393			{
394			return app(ModuleService::class)
395			->findByInterface(ModuleLanguageInterface::class, true)
396			->map(static function (ModuleLanguageInterface $module): LocaleInterface {
397			return $module->locale();
398			});
399			}
400
401			/**
402			* Translate a string, and then substitute placeholders
403			* echo I18N::translate('Hello World!');
404			* echo I18N::translate('The %s sat on the mat', 'cat');
405			*
406			* @param string $message
407			* @param string ...$args
408			*
409			* @return string
410			*/
411			public static function translate(string $message, ...$args): string
412			{
413			$message = self::$translator->translate($message);
414
415			return sprintf($message, ...$args);
416			}
417
418			/**
419			* Return the endonym for a given language - as per http://cldr.unicode.org/
420			*
421			* @param string $locale
422			*
423			* @return string
424			*/
425			public static function languageName(string $locale): string
426			{
427			return Locale::create($locale)->endonym();
428			}
429
430			/**
431			* @return string
432			*/
433			public static function languageTag(): string
434			{
435			return self::$locale->languageTag();
436			}
437
438			/**
439			* Return the script used by a given language
440			*
441			* @param string $locale
442			*
443			* @return string
444			*/
445			public static function languageScript(string $locale): string
446			{
447			return Locale::create($locale)->script()->code();
448			}
449
450			/**
451			* Translate a number into the local representation.
452			* e.g. 12345.67 becomes
453			* en: 12,345.67
454			* fr: 12 345,67
455			* de: 12.345,67
456			*
457			* @param float $n
458			* @param int $precision
459			*
460			* @return string
461			*/
462			public static function number(float $n, int $precision = 0): string
463			{
464			return self::$locale->number(round($n, $precision));
465			}
466
467			/**
468			* Translate a fraction into a percentage.
469			* e.g. 0.123 becomes
470			* en: 12.3%
471			* fr: 12,3 %
472			* de: 12,3%
473			*
474			* @param float $n
475			* @param int $precision
476			*
477			* @return string
478			*/
479			public static function percentage(float $n, int $precision = 0): string
480			{
481			return self::$locale->percent(round($n, $precision + 2));
482			}
483
484			/**
485			* Translate a plural string
486			* echo self::plural('There is an error', 'There are errors', $num_errors);
487			* echo self::plural('There is one error', 'There are %s errors', $num_errors);
488			* echo self::plural('There is %1$s %2$s cat', 'There are %1$s %2$s cats', $num, $num, $colour);
489			*
490			* @param string $singular
491			* @param string $plural
492			* @param int $count
493			* @param string ...$args
494			*
495			* @return string
496			*/
497			public static function plural(string $singular, string $plural, int $count, ...$args): string
498			{
499			$message = self::$translator->translatePlural($singular, $plural, $count);
500
501			return sprintf($message, ...$args);
502			}
503
504			/**
505			* UTF8 version of PHP::strrev()
506			* Reverse RTL text for third-party libraries such as GD2 and googlechart.
507			* These do not support UTF8 text direction, so we must mimic it for them.
508			* Numbers are always rendered LTR, even in RTL text.
509			* The visual direction of characters such as parentheses should be reversed.
510			*
511			* @param string $text Text to be reversed
512			*
513			* @return string
514			*/
515			public static function reverseText($text): string
516			{
517			// Remove HTML markup - we can't display it and it is LTR.
518			$text = strip_tags($text);
519			// Remove HTML entities.
520			$text = html_entity_decode($text, ENT_QUOTES, 'UTF-8');
521
522			// LTR text doesn't need reversing
523			if (self::scriptDirection(self::textScript($text)) === 'ltr') {
524			return $text;
525			}
526
527			// Mirrored characters
528			$text = strtr($text, self::MIRROR_CHARACTERS);
529
530			$reversed = '';
531			$digits = '';
532			while ($text !== '') {
533			$letter = mb_substr($text, 0, 1);
534			$text = mb_substr($text, 1);
535			if (strpos(self::DIGITS, $letter) !== false) {
536			$digits .= $letter;
537			} else {
538			$reversed = $letter . $digits . $reversed;
539			$digits = '';
540			}
541			}
542
543			return $digits . $reversed;
544			}
545
546			/**
547			* Return the direction (ltr or rtl) for a given script
548			* The PHP/intl library does not provde this information, so we need
549			* our own lookup table.
550			*
551			* @param string $script
552			*
553			* @return string
554			*/
555			public static function scriptDirection($script): string
556			{
557			switch ($script) {
558			case 'Arab':
559			case 'Hebr':
560			case 'Mong':
561			case 'Thaa':
562			return 'rtl';
563			default:
564			return 'ltr';
565			}
566			}
567
568			/**
569			* Identify the script used for a piece of text
570			*
571			* @param string $string
572			*
573			* @return string
574			*/
575			public static function textScript($string): string
576			{
577			$string = strip_tags($string); // otherwise HTML tags show up as latin
578			$string = html_entity_decode($string, ENT_QUOTES, 'UTF-8'); // otherwise HTML entities show up as latin
579			$string = str_replace([
580			'@N.N.',
581			'@P.N.',
582			], '', $string); // otherwise unknown names show up as latin
583			$pos = 0;
584			$strlen = strlen($string);
585			while ($pos < $strlen) {
586			// get the Unicode Code Point for the character at position $pos
587			$byte1 = ord($string[$pos]);
588			if ($byte1 < 0x80) {
589			$code_point = $byte1;
590			$chrlen = 1;
591			} elseif ($byte1 < 0xC0) {
592			// Invalid continuation character
593			return 'Latn';
594			} elseif ($byte1 < 0xE0) {
595			$code_point = (($byte1 & 0x1F) << 6) + (ord($string[$pos + 1]) & 0x3F);
596			$chrlen = 2;
597			} elseif ($byte1 < 0xF0) {
598			$code_point = (($byte1 & 0x0F) << 12) + ((ord($string[$pos + 1]) & 0x3F) << 6) + (ord($string[$pos + 2]) & 0x3F);
599			$chrlen = 3;
600			} elseif ($byte1 < 0xF8) {
601			$code_point = (($byte1 & 0x07) << 24) + ((ord($string[$pos + 1]) & 0x3F) << 12) + ((ord($string[$pos + 2]) & 0x3F) << 6) + (ord($string[$pos + 3]) & 0x3F);
602			$chrlen = 3;
603			} else {
604			// Invalid UTF
605			return 'Latn';
606			}
607
608			foreach (self::SCRIPT_CHARACTER_RANGES as $range) {
609			if ($code_point >= $range[1] && $code_point <= $range[2]) {
610			return $range[0];
611			}
612			}
613			// Not a recognised script. Maybe punctuation, spacing, etc. Keep looking.
614			$pos += $chrlen;
615			}
616
617			return 'Latn';
618			}
619
620			/**
621			* Perform a case-insensitive comparison of two strings.
622			*
623			* @param string $string1
624			* @param string $string2
625			*
626			* @return int
627			*/
628			public static function strcasecmp($string1, $string2): int
629			{
630			if (self::$collator instanceof Collator) {
631			return self::$collator->compare($string1, $string2);
632			}
633
634			return strcmp(self::strtolower($string1), self::strtolower($string2));
635			}
636
637			/**
638			* Convert a string to lower case.
639			*
640			* @param string $string
641			*
642			* @return string
643			*/
644			public static function strtolower($string): string
645			{
646			if (in_array(self::$locale->language()->code(), self::DOTLESS_I_LOCALES, true)) {
647			$string = strtr($string, self::DOTLESS_I_TOLOWER);
648			}
649
650			return mb_strtolower($string);
651			}
652
653			/**
654			* Convert a string to upper case.
655			*
656			* @param string $string
657			*
658			* @return string
659			*/
660			public static function strtoupper($string): string
661			{
662			if (in_array(self::$locale->language()->code(), self::DOTLESS_I_LOCALES, true)) {
663			$string = strtr($string, self::DOTLESS_I_TOUPPER);
664			}
665
666			return mb_strtoupper($string);
667			}
668
669			/**
670			* What format is used to display dates in the current locale?
671			*
672			* @return string
673			*/
674			public static function timeFormat(): string
675			{
676			/* I18N: This is the format string for the time-of-day. See http://php.net/date for codes */
677			return self::$translator->translate('%H:%i:%s');
678			}
679
680			/**
681			* Context sensitive version of translate.
682			* echo I18N::translateContext('NOMINATIVE', 'January');
683			* echo I18N::translateContext('GENITIVE', 'January');
684			*
685			* @param string $context
686			* @param string $message
687			* @param string ...$args
688			*
689			* @return string
690			*/
691			public static function translateContext(string $context, string $message, ...$args): string
692			{
693			$message = self::$translator->translateContext($context, $message);
694
695			return sprintf($message, ...$args);
696			}
697			}
698

fisharebest / webtrees

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