roshanrahman/profanity_filter

profanity_filter

Dart CI

Pub Version

Simple Dart class to create filters with methods to check and censor strings against profanity. A default English words list is provided (from LDNOOBW on GitHub).

You can also use the filters to filter out a custom set of words, by using the ProfanityFilter.filterOnly() constructor.

Usage

To use this plugin, add profanity_filter as a dependency in your pubspec.yaml file.

Note: The latest version of the package is null-safe. The last package version that wasn't null-safe is 1.0.4

Example

import 'package:profanity_filter/profanity_filter.dart';

void main() {
  //Create the filter with the default constructor.
  //The default constructor uses the default list of words provided by [LDNOOBW on GitHub](
  //https://github.com/LDNOOBW/List-of-Dirty-Naughty-Obscene-and-Otherwise-Bad-Words)
  //Other constructors are available, see [README.md](https://pub.dev/packages/profanity_filter).
  final filter = ProfanityFilter();

  //This string contains the profanity 'ass'
  String badString = 'You are an ass';

  //Check for profanity - returns a boolean (true if profanity is present)
  bool hasProfanity = filter.hasProfanity(badString);
  print('The string $badString has profanity: $hasProfanity');

  //Get the profanity used - returns a List<String>
  List<String> wordsFound = filter.getAllProfanity(badString);
  print('The string contains the words: $wordsFound');

  //Censor the string - returns a 'cleaned' string.
  String cleanString = filter.censor(badString);
  print('Censored version of "$badString" is "$cleanString"');
}

Methods

hasProfanity - Detect if a string contains profanity

Use the hasProfanity() method of the filter instance. Pass in the string to be tested.

Example

final filter = ProfanityFilter();
String badString = 'you are an ass';
filter.hasProfanity(badString); //Returns true.

getAllProfanity - Get a list of all profane words found

Use the getAllProfanity() method of the filter instance. Pass in the string to be tested.

Example

final filter = ProfanityFilter();
String badString = 'you are an ass';
List<String> wordsFound = filter.getAllProfanity(badString); //Returns ['ass']

censor - Censor a string (replace profanity with something clean)

Use the censor() method of the filter instance. Pass in the string to be censored.

Example

final filter = ProfanityFilter();
String badString = 'you are an ass';
String cleanString = filter.censor('you are an ass'); //cleanString: 'you are an ***'

Optionally, you can provide your own clean replacement word to the replaceWith named parameter. filter.censor(string, replaceWith:'[censored]') will replace any profanity in string with [censored]

Default Profanity List

The default profanity list is taken from the LDNOOBW list, licensed under a Creative Commons Attribution 4.0 International License.

To create a filter with the default list, use the default constructor ProfanityFilter()

Variations

To include custom words alongside default list

Use ProfanityFilter.filterAdditionally() constructor and pass your list of custom words.

This will use a list which is equivalent to Default List + Custom List

To filter only custom words (default list is ignored)

Use ProfanityFilter.filterOnly() constructor and pass a list containing your custom set of words.

This will use a list which is equivalent to Custom List

To filter with a few exclusions from default list

Use ProfanityFilter.ignore() constructor and pass your list of custom words. Those words will be removed from the default list if they exist there.

This will use a list which is equivalent to Default List - Custom List