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config.go
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config.go
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package goclean
import (
"encoding/json"
"fmt"
"io/ioutil"
"regexp"
"strings"
)
// WordMatcher is a struct that contains the word or regex to be matched and the level of the word.
type WordMatcher struct {
Word string `json:"word,omitempty"`
Regex string `json:"regex,omitempty"`
Level int32 `json:"level,omitempty,default=1"`
Matcher *regexp.Regexp
}
// Config is a struct that contains the configuration for the profanity sanitizer.
type Config struct {
DetectLeetSpeak bool `json:"detectLeetSpeak"`
DetectObfuscated bool `json:"detectObfuscated"`
ReplacementCharacter string `json:"replacementCharacter"`
ObfuscationLength int32 `json:"obfuscationLength,default=3"`
Profanities []WordMatcher `json:"profanities"`
FalsePositives []string `json:"falsePositives"`
FalseNegatives []WordMatcher `json:"falseNegatives"`
}
var leetSpeakMapping = map[string]string{
"a": "[a4]",
"s": "[s5$]",
}
func (c *Config) initializeMatchers(matchers []WordMatcher) []WordMatcher {
for i, m := range matchers {
if m.Regex != "" {
matchers[i].Matcher = regexp.MustCompile("(?i)" + m.Regex)
} else if m.Word != "" {
split := strings.Split(m.Word, "")
c.replaceLeetSpeak(split)
c.configureDetectObfuscated(matchers, split, i)
}
}
return matchers
}
func (c *Config) configureDetectObfuscated(matchers []WordMatcher, split []string, i int) {
if c.DetectObfuscated {
str := strings.Join(split, fmt.Sprintf("\\W{0,%d}", c.ObfuscationLength))
matchers[i].Matcher = regexp.MustCompile("(?i)" + str)
} else {
str := strings.Join(split, "")
matchers[i].Matcher = regexp.MustCompile("(?i)" + str)
}
}
func (c *Config) replaceLeetSpeak(chars []string) {
if c.DetectLeetSpeak {
for i, ch := range chars {
if leetSpeakMapping[ch] != "" {
chars[i] = leetSpeakMapping[ch]
} else {
chars[i] = ch
}
}
}
}
// DefaultConfig is the default configuration for the profanity sanitizer.
func DefaultConfig() *Config {
file, _ := ioutil.ReadFile("config.json")
config := &Config{}
_ = json.Unmarshal(file, config)
return config
}