open-consul/agent/config/translate.go

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package config
import "strings"
// TranslateKeys recursively translates all keys from m in-place to their
// canonical form as defined in dict which maps an alias name to the canonical
// name. If m already has a value for the canonical name then that one is used
// and the value for the alias name is discarded. Alias names are matched
// case-insensitive.
//
// Example:
//
// m = TranslateKeys(m, map[string]string{"CamelCase": "snake_case"})
//
func TranslateKeys(v map[string]interface{}, dict map[string]string) {
ck(v, dict)
}
func ck(v interface{}, dict map[string]string) interface{} {
switch x := v.(type) {
case map[string]interface{}:
for k, v := range x {
canonKey := dict[strings.ToLower(k)]
// no canonical key? -> use this key
if canonKey == "" {
x[k] = ck(v, dict)
continue
}
// delete the alias
delete(x, k)
// if there is a value for the canonical key then keep it
if _, ok := x[canonKey]; ok {
continue
}
// otherwise translate to the canonical key
x[canonKey] = ck(v, dict)
}
return x
case []interface{}:
var a []interface{}
for _, xv := range x {
a = append(a, ck(xv, dict))
}
return a
default:
return v
}
}