breadcrumb-the-shire/lib/Repository/Settings/SettingRepository.php

<?php

namespace MintyPHP\Repository\Settings;

use MintyPHP\DB;

/** Reads and upserts application settings as key-value pairs in the database. */
class SettingRepository implements SettingRepositoryInterface
{
    public function find(string $key): ?array
    {
        $row = DB::selectOne('select `key`, `value`, `description`, `updated_at` from settings where `key` = ? limit 1', $key);
        if (!$row) {
            return null;
        }
        return $row['settings'] ?? $row;
    }

    public function getValue(string $key): ?string
    {
        $row = $this->find($key);
        if (!$row) {
            return null;
        }
        return array_key_exists('value', $row) ? (string) $row['value'] : null;
    }

    public function set(string $key, ?string $value, ?string $description = null): bool
    {
        $query = 'insert into settings (`key`, `value`, `description`) values (?, ?, ?) '
            . 'on duplicate key update `value` = values(`value`), '
            . '`description` = ifnull(values(`description`), `description`)';
        $result = DB::update($query, $key, $value, $description);
        return $result !== false;
    }
}