<?php

namespace app\sys\taglib;

use Exception;
use think\template\TagLib;

class Auth extends TagLib
{
    /**
     * 检测是否有改权限
     */
    protected $tags   =  [
         'check'     => ['attr' => 'name', 'close' => 1],
         'for' => ['attr' => 'start,end,search,attr'],
         'volist' => ['attr' => 'name,id,search,attr']
    ];

    /**
     * 权限判断
     */
    public function tagCheck(array $tag, string $content): string
    {
        if (empty($tag['name'])) throw new Exception('tag attr "name" is must:');

        $parse = "<?php \$permission = request()->grant; if(in_array('$tag[name]', \$permission)):?>";
        $parse .= $content;
        $parse .= "<?php endif;?>";
        return $parse;
    }

    public function tagFor(array $tag, string $content): string
    {
        $start = $tag['start'];
        $end = $tag['end'];
        $search = $this->autoBuildVar($tag['search']);
        $attr = $tag['attr'];

        $parse = '<?php ';
        $parse .= 'for($i='.$start.';$i<'.$end.';$i++):';
        $parse .= $search.' == $i?$select=" '.$attr.'":$select=" ";';
        $parse .= ' ?>';
        $parse .= $content;
        $parse .= '<?php endfor; ?>';

        return $parse;
    }

    public function tagVolist(array $tag, string $content): string
    {
        $name = $tag['name'];
        $id = $tag['id'];
        $search = $this->autoBuildVar($tag['search']);
        $attr = $tag['attr'];
        $parse = '<?php ';
        $parse .= 'foreach($' . $name . ' as $key=>$'.$id.'):';
        $parse .= $search .' == $key?$select="' . $attr . '":$select="";';
        $parse .= ' ?>';
        $parse .= $content;
        $parse .= '<?php endforeach; ?>';

        return $parse;
    }
}