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< ? php
namespace App\Support ;
use Overtrue\Pinyin\Pinyin ;
/**
* 场馆后台账号：用户名（拼音首字母缩写）与密码（首尾大写 + @）规则。
*/
final class VenueAdminCredentials
{
/**
* 由场馆名称得到拼音首字母缩写（小写、仅字母数字），用于用户名及密码变换的基底。
*/
public static function acronymFromVenueName ( string $name ) : string
{
$joined = Pinyin :: abbr ( $name ) -> join ( '' );
$joined = strtolower ( $joined );
$joined = preg_replace ( '/[^a-z0-9]/' , '' , $joined ) ? ? '' ;
return $joined !== '' ? $joined : 'v' ;
}
/**
* 由「缩写基底」生成密码：首字母大写、中间小写、末字母大写、末尾 @。
* 例：
*/
public static function passwordFromAcronym ( string $acronymLower ) : string
{
$slug = strtolower ( preg_replace ( '/[^a-z0-9]/' , '' , $acronymLower ) ? ? '' );
if ( $slug === '' ) {
return 'Xx@' ;
}
$len = strlen ( $slug );
if ( $len === 1 ) {
return strtoupper ( $slug [ 0 ]) . '@' ;
}
$first = strtoupper ( $slug [ 0 ]);
$last = strtoupper ( $slug [ $len - 1 ]);
$middle = strtolower ( substr ( $slug , 1 , $len - 2 ));
return $first . $middle . $last . '@' ;
}
}
