wordwall

WordWall

WordWall is a Go package and CLI tool for detecting and filtering zero-tolerance or banned language in strings. It includes support for obfuscated text (e.g., leetspeak, Greek letters, and other special characters).

Features

• Define banned words with customizable filtering rules
• Detect obfuscated words (e.g., h@t3, sp@m, Greek or Unicode lookalikes)
• Regex-based matching with case insensitivity and spacing tolerance
• Support for different rule types:
  • Censor: Replace offending words
  • Filter: Flag content for review
  • Ban: Trigger zero-tolerance logic

Installation

Go package:

go get github.com/AmorphousShape/wordwall/pkg/wordwall

Usage

As a Go package:

package main

import (
    "fmt"
    "github.com/AmorphousShape/wordwall/pkg/wordwall"
)

func main() {
    // Set banned words and the rule to apply
    wordwall.SetBannedWords([]string{"hate", "spam"}, wordwall.RuleCensor)

    input := "I h@t3 sp@m"
    filtered, hitCensor, hitFilter, hitBan := wordwall.FilterString(input)

    fmt.Println("Filtered:", filtered)
    fmt.Println("Hit censor?", hitCensor)
    fmt.Println("Hit filter?", hitFilter)
    fmt.Println("Hit ban?", hitBan)
}

Output:

Filtered: I **** ****
Hit censor? true
Hit filter? false
Hit ban? false

API

SetBannedWords(words []string, response Rule)

Sets the banned words and the default filtering rule to apply when they’re detected.

FilterString(message string) (newMessage string, hitCensor bool, hitFilter bool, hitBan bool)

Filters a message and returns the cleaned version, along with booleans indicating which rule(s) were triggered.