<?php

namespace AOP\App\Fields;

/**
 * The min/max/decimals logic that Number and Range share: a value outside min or max is emptied, everything
 * else rounded to the number of decimals the field allows, plus the HTML step attribute that goes with it.
 *
 * @since 1.0.0
 * @internal Used by the built-in types; not part of the Field Types API.
 */
trait NumberSanitize
{
    /**
     * @param mixed $value
     * @param array $field The stored field (reads min_value, max_value, decimals).
     *
     * @return float|string|null
     */
    protected function sanitizeNumberValue($value, array $field)
    {
        $min = $field['min_value'] ?? '';
        $max = $field['max_value'] ?? '';
        $decimals = $field['decimals'] ?? '';
        $float = (float) $value;

        if (!is_numeric($float)) {
            return null;
        }

        if ($min && $float < $min) {
            return '';
        }

        if ($max && $float > $max) {
            return '';
        }

        // The editor always posts 0, 1 or 2; an import or an old page may have nothing.
        return round($float, (int) $decimals);
    }

    /**
     * The value of the step attribute. It is escaped as a value and put between quotes by render(); escaping a
     * whole `step="0.01"` turned its quotes into &quot; and made browsers refuse decimals.
     */
    protected function numberStep(string $decimals): string
    {
        if ($decimals === '1') {
            return '0.1';
        }

        if ($decimals === '2') {
            return '0.01';
        }

        return '1';
    }
}