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package strcase
import (
"strings"
)
// Converts a string to snake_case
func ToSnake(s string) string {
s = strings.Trim(s, " ")
n := ""
for i, v := range s {
// treat acronyms as words, eg for JSONData -> JSON is a whole word
nextCaseIsChanged := false
if i+1 < len(s) {
next := s[i+1]
if (isUpperLetter(v) && isLowerLetter(int32(next))) || (isLowerLetter(v) && isUpperLetter(int32(next))) {
nextCaseIsChanged = true
}
}
if i > 0 && n[len(n)-1] != '_' && nextCaseIsChanged {
// add underscore if next letter case type is changed
if isUpperLetter(v) {
n += "_" + string(v)
} else if isLowerLetter(v) {
n += string(v) + "_"
}
} else if v == ' ' || v == '-' {
// replace spaces and dashes with underscores
n += "_"
} else {
n = n + string(v)
}
}
n = strings.ToLower(n)
return n
}
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