40 lines
937 B
Go
40 lines
937 B
Go
// Package strcase converts strings to snake_case or CamelCase
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package strcase
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import (
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"strings"
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)
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// Converts a string to snake_case
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func ToSnake(s string) string {
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s = addWordBoundariesToNumbers(s)
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s = strings.Trim(s, " ")
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n := ""
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for i, v := range s {
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// treat acronyms as words, eg for JSONData -> JSON is a whole word
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nextCaseIsChanged := false
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if i+1 < len(s) {
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next := s[i+1]
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if (v >= 'A' && v <= 'Z' && next >= 'a' && next <= 'z') || (v >= 'a' && v <= 'z' && next >= 'A' && next <= 'Z') {
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nextCaseIsChanged = true
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}
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}
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if i > 0 && n[len(n)-1] != '_' && nextCaseIsChanged {
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// add underscore if next letter case type is changed
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if v >= 'A' && v <= 'Z' {
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n += "_" + string(v)
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} else if v >= 'a' && v <= 'z' {
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n += string(v) + "_"
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}
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} else if v == ' ' {
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// replace spaces with underscores
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n += "_"
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} else {
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n = n + string(v)
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}
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}
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n = strings.ToLower(n)
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return n
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}
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