File Plurals.php | ICanBoogie/CLDR 1.9.x

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<?php

/*
 * This file is part of the ICanBoogie package.
 *
 * (c) Olivier Laviale <olivier.laviale@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace ICanBoogie\CLDR;

use ICanBoogie\CLDR\Plurals\Rule;
use ICanBoogie\CLDR\Plurals\Samples;

/**
 * Representation of plurals
 */
class Plurals extends \ArrayObject
{
    const COUNT_ZERO = 'zero';
    const COUNT_ONE = 'one';
    const COUNT_TWO = 'two';
    const COUNT_FEW = 'few';
    const COUNT_MANY = 'many';
    const COUNT_OTHER = 'other';

    const RULE_COUNT_PREFIX = 'pluralRule-count-';

    /**
     * @var Rule[][]
     */
    private $rules = [];

    /**
     * @var Samples[][]
     */
    private $samples = [];

    /**
     * @param number $number
     * @param string $locale
     *
     * @return string One of `COUNT_*`.
     */
    public function rule_for($number, $locale)
    {
        foreach ($this->rule_instances_for($locale) as $count => $rule)
        {
            if ($rule->validate($number))
            {
                return $count;
            }
        }

        return self::COUNT_OTHER; // @codeCoverageIgnore
    }

    /**
     * @param string $locale
     *
     * @return string[]
     */
    public function rules_for($locale)
    {
        return array_keys($this->rule_instances_for($locale));
    }

    /**
     * @param string $locale
     *
     * @return Samples[]
     */
    public function samples_for($locale)
    {
        $samples = &$this->samples[$locale];

        return $samples ?: $samples = $this->create_samples_for($locale);
    }

    /**
     * @param string $locale
     *
     * @return Rule[]
     */
    private function rule_instances_for($locale)
    {
        $rules = &$this->rules[$locale];

        return $rules ?: $rules = $this->create_rules_for($locale);
    }

    /**
     * @param string $locale
     *
     * @return Rule[]
     */
    private function create_rules_for($locale)
    {
        $rules = [];
        $prefix_length = strlen(self::RULE_COUNT_PREFIX);

        foreach ($this[$locale] as $count => $rule_string)
        {
            $count = substr($count, $prefix_length);
            $rules[$count] = Rule::from($this->extract_rule($rule_string));
        }

        return $rules;
    }

    /**
     * @param string $rule_string
     *
     * @return string
     */
    private function extract_rule($rule_string)
    {
        $rule = explode('@', $rule_string, 2);
        $rule = array_shift($rule);
        $rule = trim($rule);

        return $rule;
    }

    /**
     * @param string $locale
     *
     * @return Samples[]
     */
    private function create_samples_for($locale)
    {
        $samples = [];
        $prefix_length = strlen(self::RULE_COUNT_PREFIX);

        foreach ($this[$locale] as $count => $rule_string)
        {
            $count = substr($count, $prefix_length);
            $samples[$count] = Samples::from($this->extract_samples($rule_string));
        }

        return $samples;
    }

    /**
     * @param string $rule_string
     *
     * @return string
     */
    private function extract_samples($rule_string)
    {
        return substr($rule_string, strpos($rule_string, '@'));
    }
}

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