48 lines
894 B
Go
48 lines
894 B
Go
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package gapr
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import (
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"strings"
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"unicode"
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)
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type KeyMapper interface {
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MapKey(orig string) string
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}
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type KeyMapperFunc func(orig string) string
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func (f KeyMapperFunc) MapKey(orig string) string {
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return f(orig)
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}
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var (
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LowercaseKeyMapper KeyMapper = KeyMapperFunc(func(orig string) string {
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return strings.ToLower(orig)
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})
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UppercaseKeyMapper KeyMapper = KeyMapperFunc(func(orig string) string {
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return strings.ToUpper(orig)
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})
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CamelCaseKeyMapper = genericFirstKeyMapper(unicode.ToLower)
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PascalCaseKeyMapper = genericFirstKeyMapper(unicode.ToUpper)
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)
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func genericFirstKeyMapper(m func(r rune) rune) KeyMapper {
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return KeyMapperFunc(func(orig string) string {
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if len(orig) < 1 {
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return ""
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}
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mapped := make([]byte, 1, len(orig))
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mapped[0] = byte(m(rune(orig[0])))
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if len(orig) > 1 {
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mapped = append(mapped, orig[1:]...)
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}
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return string(mapped)
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})
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}
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