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