tp5/lib/csv/csv_data.dart

import 'dart:io';
import 'package:archive/archive.dart';
import 'package:jiffy/jiffy.dart';
// import 'package:tp5/core/utils.dart';

class CsvData {
  static Future<String> extractTextFileFromZip(
      String zipPath, String textFileName) async {
    // Read the Zip file from disk.
    try {
      final bytes = File(zipPath).readAsBytesSync();

      // Decode the Zip file
      final archive = ZipDecoder().decodeBytes(bytes);

      // Look for the text file in the archive
      for (final file in archive) {
        if (file.name == textFileName) {
          // Found the text file
          if (file.isFile) {
            final data = file.content as List<int>;
            String content = String.fromCharCodes(data);
            return content;
          }
        }
      }
    } finally {}
    return "";
  }

  static Jiffy? getLastModified(String zipPath, String textFileName) {
    final bytes = File(zipPath).readAsBytesSync();
    final archive = ZipDecoder().decodeBytes(bytes);
    for (final file in archive) {
      if (file.name == textFileName) {
        if (file.isFile) {
          return Jiffy.parseFromDateTime(
              DateTime.fromMicrosecondsSinceEpoch(file.lastModTime));
        }
      }
    }
    return null;
  }

  static List<List<dynamic>> csv2list(String text,
      {bool nulling = true, bool quotes = true, bool trim = true}) {
    List<List<dynamic>> out = [];
    final lines = text.split("\n");
    for (var line in lines) {
      final cols = line.split(",").map((String? e) {
        if (e != null && quotes) {
          e = e.replaceAll('"', "");
        }
        if (e != null && trim) {
          e = e.trim();
        }
        if (nulling) {
          e = (e == "") ? null : e;
        }
        return e;
      }).toList();
      // print("${out.length}: $cols");
      if (cols.isNotEmpty && cols.length > 1) out.add(cols);
    }
    return out;
  }

// Usage
  void main() {
    extractTextFileFromZip('path/to/your/zipfile.zip', 'your_text_file.txt');
  }
}