line_pattern_matcher 1.1.0 copy "line_pattern_matcher: ^1.1.0" to clipboard
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A flexible Dart package for matching complex patterns across multiple lines of text. Ideal for log analysis, text processing, and pattern recognition tasks.

LinePatternMatcher #

pub package Build Status

LinePatternMatcher is a flexible Dart package for matching complex patterns across multiple lines of text. It's particularly useful for log analysis, text processing, and pattern recognition tasks.

Features #

  • Support for multiple pattern types: firstLine, secondLine, lastLine, and sequential
  • AND/OR logic for keyword matching using predefined LogicType constants
  • Custom pattern definitions using simple Map structures
  • JSON serialization and deserialization support
  • Pattern visualization functionality
  • Efficient processing for large text datasets

Installation #

Add this line to your package's pubspec.yaml file:

dependencies:
  line_pattern_matcher: ^1.0.1

Then run:

dart pub get

Usage #

Basic Usage #

import 'package:line_pattern_matcher/line_pattern_matcher.dart';

void main() {
  final matcher = LinePatternMatcher([
    PatternConfig(
      type: 'firstLine',
      keywords: [['Hello'], ['Hi']],
      logic: LogicType.or
    ),
    PatternConfig(
      type: 'lastLine',
      keywords: [['Goodbye']]
    )
  ]);

  final lines = [
    'Hello, World!',
    'This is a test.',
    'Goodbye!'
  ];

  if (matcher.match(lines)) {
    print('Pattern matched!');
  } else {
    print('Pattern not matched.');
  }
}

Complex Pattern Example #

final complexMatcher = LinePatternMatcher([
  PatternConfig(
    type: 'firstLine',
    keywords: [
      ['[User List]'],
      ['[Chat Room]']
    ],
    logic: LogicType.or
  ),
  PatternConfig(
    type: 'secondLine',
    keywords: [
      ['Total Users:', 'Online:']
    ]
  ),
  PatternConfig(
    type: 'sequential',
    keywords: [
      ['Name:', 'Status:'],
      ['Last Seen:']
    ]
  ),
  PatternConfig(
    type: 'lastLine',
    keywords: [
      ['End of List']
    ]
  )
]);

List<String> sampleText = [
  '[User List]',
  'Total Users: 1000, Online: 150',
  'Name: John Doe, Status: Active',
  'Last Seen: 5 minutes ago',
  'Name: Jane Smith, Status: Idle',
  'Last Seen: 1 hour ago',
  'End of List'
];

bool matched = complexMatcher.match(sampleText);
print(matched ? 'Complex pattern matched!' : 'Complex pattern not matched.');

JSON Serialization and Deserialization #

String jsonString = matcher.toJson();
LinePatternMatcher deserializedMatcher = LinePatternMatcher.fromJson(jsonString);

Printing Patterns #

matcher.printPatterns();
// or
String patternsString = matcher.getPatternsString();
print(patternsString);

Advanced Usage #

  • Custom Pattern Types: Extend the PatternConfig class to create custom pattern types for specific use cases.
  • Performance Optimization: For large text datasets, consider using stream processing or parallel processing to improve efficiency.
  • Pattern Composition: Combine multiple LinePatternMatcher instances for more complex text analysis tasks.

Contributing #

Contributions are welcome! Please feel free to submit pull requests or create issues to improve this package.

Development Setup #

  1. Clone the repository
  2. Run dart pub get to install dependencies
  3. Make your changes
  4. Run tests with dart test
  5. Submit a pull request with your changes

License #

This project is licensed under the MIT License - see the LICENSE file for details.

Changelog #

For a detailed changelog, please see the CHANGELOG.md file.

Support #

If you encounter any issues or have questions, please file an issue on the GitHub issue tracker.

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Publisher

verified publisherchangyy.app

A flexible Dart package for matching complex patterns across multiple lines of text. Ideal for log analysis, text processing, and pattern recognition tasks.

Repository (GitHub)
View/report issues

Documentation

API reference

License

MIT (license)

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