<?php
// 这是系统自动生成的公共文件

if (!function_exists('array_to_tree')) {
    /**
     * 数组转换为树状结构
     * @param array $data 数据
     * @param int $pid 父级ID
     * @param string $with 转换依据字段
     * @param int $level 层级
     * @return array
     */
    function array_to_tree(array $data, int $pid, string $with = 'pid', int|false $level = 1)
    {
        $ret = [];
        foreach ($data as $item) {
            if ($item[$with] == $pid) {
                if ($level !== false) {
                    $item['level'] = $level;
                    $level         = $level + 1;
                }
                $children = array_to_tree($data, $item['id'], $with, $level);
                if ($children) {
                    $item['children'] = $children;
                }
                $ret[] = $item;
            }
        }
        return $ret;
    }
}

if (!function_exists('xlsx_reader')) {
    /**
     * 读取Excel数据
     * @param string $file Excel文件路径
     * @param int $initial_row 初始行
     * @param array $keys_map 列 -> 键 例：['A' => 'name', 'B' => 'age', 'C' => 'sex']
     * @return array
     */
    function xlsx_reader(string $file, int $initial_row = 1, array $keys_map = []): array
    {
        $reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader('Xlsx');

        // 读取文件
        $spreadsheet = $reader->load($file);

        // 获取活动sheet
        $sheet = $spreadsheet->getActiveSheet();

        // 获取最大行
        $max_row = $sheet->getHighestRow();

        // 获取最大列
        $max_col = $sheet->getHighestColumn();

        $xlsx_data = [];
        $first_col = ord('A');
        $last_col  = ord($max_col);
        for ($row = $initial_row; $row <= $max_row; $row++) {
            for ($col = $first_col; $col <= $last_col; $col++) {
                $key = $col_chr = chr($col);
                if (!empty($keys_map)) {
                    $key = $keys_map[$col_chr] ?? $col_chr;
                }
                $xlsx_data[$row][$key] = $sheet->getCell($col_chr . $row)->getValue();
            }
        }

        return $xlsx_data;
    }
}

if (!function_exists('xlsx_writer')) {
    /**
     * 构建Excel数据
     * @param array $data 数据 例：[['name'=>'张三','age'=>18, 'sex'=>'男']]
     * @param array $schema 表头信息 例：['name' => '姓名', 'age' => '年龄', 'sex' => '性别']
     * @param string $filename 下载文件名称 默认为YmdHis时间
     * @return \PhpOffice\PhpSpreadsheet\Writer\IWriter
     */
    function xlsx_writer(array|\think\model\Collection $data, array $schema, string $filename = ''): \PhpOffice\PhpSpreadsheet\Writer\IWriter
    {
        // 获取Spreadsheet对象
        $spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
        $sheet = $spreadsheet->getActiveSheet();

        // 写入表头
        $title = array_values($schema);
        $title_col = 'A';
        foreach ($title as $value) {
            // 单元格内容写入
            $sheet->setCellValue($title_col . '1', $value);
            $title_col++;
        }

        // 写入数据
        $row = 2;
        $keys = array_keys($schema);
        foreach ($data as $item) {
            $data_col = 'A';
            foreach ($keys as $key) {
                $sheet->setCellValue($data_col . $row, $item[$key] ?? '');
                $data_col++;
            }
            $row++;
        }

        flush();
        ob_flush();
        if ($filename == '') $filename = date('YmdHis');
        header('Access-Control-Expose-Headers: Content-Disposition');
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet; Charset=UTF-8');
        header('Content-Disposition: attachment;filename=' . $filename . '.xlsx');
        header('Cache-Control: max-age=0');
        return \PhpOffice\PhpSpreadsheet\IOFactory::createWriter($spreadsheet, 'Xlsx');
    }
}