fis_lib_report/lib/converts/date_to_string_converter.dart

class DateToStringConverter {
  static String dateAndTimeToString(
      var timestamp, Map<String, String> formart) {
    if (timestamp == null || timestamp == "") {
      return "";
    }
    String targetString = "";
    final date = DateTime.fromMicrosecondsSinceEpoch(timestamp * 1000);
    // final String tmp = date.toString();
    String year = date.year.toString();
    String month = date.month.toString();
    if (date.month <= 9) {
      month = "0" + month;
    }
    String day = date.day.toString();
    if (date.day <= 9) {
      day = "0" + day;
    }
    String hour = date.hour.toString();
    if (date.hour <= 9) {
      hour = "0" + hour;
    }
    String minute = date.minute.toString();
    if (date.minute <= 9) {
      minute = "0" + minute;
    }
    String second = date.second.toString();
    if (date.second <= 9) {
      second = "0" + second;
    }
    // String millisecond = date.millisecond.toString();
    String morningOrafternoon = "上午";
    if (date.hour >= 12) {
      morningOrafternoon = "下午";
    }

    if (formart["y-m"] != null && formart["m-d"] != null) {
      targetString = year + formart["y-m"]! + month + formart["m-d"]! + day;
    } else if (formart["y-m"] == null && formart["m-d"] != null) {
      targetString = month + formart["m-d"]! + day;
    } else if (formart["y-m"] != null && formart["m-d"] == null) {
      targetString = year + formart["y-m"]! + month;
    }

    targetString += " ";

    if (formart["m-a"] != null) {
      targetString += morningOrafternoon + " ";
    }

    if (formart["h-m"] != null && formart["m-s"] != null) {
      targetString +=
          hour + formart["h-m"]! + minute + formart["m-s"]! + second;
    } else if (formart["h-m"] == null && formart["m-s"] != null) {
      targetString += minute + formart["m-s"]! + second;
    } else if (formart["h-m"] != null && formart["m-s"] == null) {
      targetString += hour + formart["h-m"]! + minute;
    }

    return targetString;
  }

  static String dateTimeConvert(String format, int timestamp) {
    String dateTime = '';
    if (format == 'yyyy-MM-dd') {
      dateTime = DateToStringConverter.dateAndTimeToString(
          timestamp, {"y-m": "-", "m-d": "-"});
    } else if (format == 'yyyy年M月d日 HH:mm') {
      dateTime = DateToStringConverter.dateAndTimeToString(
          timestamp, {"y-m": "年", "m-d": "月", "d-h": "日", "h-m": ":"});
    } else if (format == 'yyyy-MM-dd HH:mm') {
      dateTime = DateToStringConverter.dateAndTimeToString(
          timestamp, {"y-m": "-", "m-d": "-", "h-m": ":"});
    } else if (format == "yyyy年M月d日") {
      dateTime = DateToStringConverter.dateAndTimeToString(
          timestamp, {"y-m": "年", "m-d": "月", "d-h": "日"});
    } else if (format == 'yyyy.MM.dd') {
      dateTime = DateToStringConverter.dateAndTimeToString(
          timestamp, {"y-m": ".", "m-d": "."});
    } else if (format == 'yyyy/MM/dd') {
      dateTime = DateToStringConverter.dateAndTimeToString(
          timestamp, {"y-m": "/", "m-d": "/"});
    }
    return dateTime;
  }
}