将valine导出的评论转换成CSV格式，方便导入自建数据库（如 waline 的 wl_comment 表）

valineCommentToCSV.js

/**
 * trans 
 * 将valine导出的评论转换成CSV格式
 * @param {String} input - 从 valine 导出的 JSON 文本
 * @return {String} CSV 文本
 */
const trans = input => {
    let output = [];
    const field = [
        "nick",
        "updatedAt",
        "mail",
        "ua",
        "insertedAt",
        "createdAt",
        "comment",
        "link",
        "url"
    ];
    output.push(field.join(","));

    const [_head, ...body] = input.results;
    body.forEach(row => {
        let data = field.map(key => {
            if (key == "insertedAt") {
                return row[key].iso;
            }
            return row[key]?.replaceAll('"', '""');
        });

        output.push('"' + data.join('","') + '"');
    });

    return output.join("\n");
};