krystal/go-katapult

package gen

import (
    "strings"

    "golang.org/x/text/cases"
    "golang.org/x/text/language"
)

var camelAcronyms = map[string]bool{
    "AAAA":  true,
    "ALIAS": true,
    "API":   true,
    "CAA":   true,
    "CNAME": true,
    "DNS":   true,
    "IP":    true,
    "IPS":   true,
    "ISO":   true,
    "JSON":  true,
    "MX":    true,
    "NS":    true,
    "SRV":   true,
    "SSH":   true,
    "SSHFP": true,
    "TXT":   true,
    "XML":   true,
    "YAML":  true,
}

var titler = cases.Title(language.English)

func snakeToPascal(snake string) string {
    parts := strings.Split(snake, "_")
    r := []string{}

    for _, part := range parts {
        if part == "" {
            continue
        }

        upper := strings.ToUpper(part)
        if camelAcronyms[upper] {
            r = append(r, upper)
        } else {
            r = append(r, titler.String(part))
        }
    }

    return strings.Join(r, "")
}