<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 21/11/23
 * Time: 19:05.
 */

namespace App\Services\Api;

class SortService
{
    // $list 二维数组
    public static function getResultList($list)
    {
        return self::groupByFirstLetter($list);
    }

    protected static function groupByFirstLetter($list)
    {
        $r_list = [];
        foreach ($list as $key => $val) {
            $letter            = self::firstChar($val['name']);
            $val['letter']     = $letter;
            $r_list[$letter][] = $val;
        }
        foreach ($r_list as $k => $v) {
            $r_list[$k] = self::listSortBy($v, 'name');
        }
        ksort($r_list);
        $r_list = array_values($r_list);

        return $r_list;
    }

    protected static function listSortBy($list, $field)
    {
        $arr = $result = [];
        foreach ($list as $key => $val) {
            $arr[$key] = &$val[$field];
        }
        asort($arr);
        foreach ($arr as $k => $v) {
            $result[] = &$list[$k];
        }

        return $result;
    }

    public static function firstChar($s)
    {
        $s0 = mb_substr($s, 0, 3); // 获取名字的姓
        $s  = iconv('UTF-8', 'gb2312', $s0); // 将UTF-8转换成GB2312编码

        if (ord($s0) > 128) { // 汉字开头，汉字没有以U、V开头的
            $asc = ord($s[0]) * 256 + ord($s[0]) - 65536;
            if ($asc >= -20319 and $asc <= -20284) {
                return 'A';
            }
            if ($asc >= -20283 and $asc <= -19776) {
                return 'B';
            }
            if ($asc >= -19775 and $asc <= -19219) {
                return 'C';
            }
            if ($asc >= -19218 and $asc <= -18711) {
                return 'D';
            }
            if ($asc >= -18710 and $asc <= -18527) {
                return 'E';
            }
            if ($asc >= -18526 and $asc <= -18240) {
                return 'F';
            }
            if ($asc >= -18239 and $asc <= -17760) {
                return 'G';
            }
            if ($asc >= -17759 and $asc <= -17248) {
                return 'H';
            }
            if ($asc >= -17247 and $asc <= -17418) {
                return 'I';
            }
            if ($asc >= -17417 and $asc <= -16475) {
                return 'J';
            }
            if ($asc >= -16474 and $asc <= -16213) {
                return 'K';
            }
            if ($asc >= -16212 and $asc <= -15641) {
                return 'L';
            }
            if ($asc >= -15640 and $asc <= -15166) {
                return 'M';
            }
            if ($asc >= -15165 and $asc <= -14923) {
                return 'N';
            }
            if ($asc >= -14922 and $asc <= -14915) {
                return 'O';
            }
            if ($asc >= -14914 and $asc <= -14631) {
                return 'P';
            }
            if ($asc >= -14630 and $asc <= -14150) {
                return 'Q';
            }
            if ($asc >= -14149 and $asc <= -14091) {
                return 'R';
            }
            if ($asc >= -14090 and $asc <= -13319) {
                return 'S';
            }
            if ($asc >= -13318 and $asc <= -12839) {
                return 'T';
            }
            if ($asc >= -12838 and $asc <= -12557) {
                return 'W';
            }
            if ($asc >= -12556 and $asc <= -11848) {
                return 'X';
            }
            if ($asc >= -11847 and $asc <= -11056) {
                return 'Y';
            }
            if ($asc >= -11055 and $asc <= -10247) {
                return 'Z';
            }
        } elseif (ord($s) >= 48 and ord($s) <= 57) { // 数字开头
            switch (iconv_substr($s, 0, 1, 'utf-8')) {
                case 1:
                    return 'Y';
                case 2:
                    return 'E';
                case 3:
                    return 'S';
                case 4:
                    return 'S';
                case 5:
                    return 'W';
                case 6:
                    return 'L';
                case 7:
                    return 'Q';
                case 8:
                    return 'B';
                case 9:
                    return 'J';
                case 0:
                    return 'L';
            }
        } elseif (ord($s) >= 65 and ord($s) <= 90) { // 大写英文开头
            return substr($s, 0, 1);
        } elseif (ord($s) >= 97 and ord($s) <= 122) { // 小写英文开头
            return strtoupper(substr($s, 0, 1));
        } else {
            return iconv_substr($s0, 0, 1, 'utf-8');
        }
    }
}