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75 lines
1.1 KiB
Go
75 lines
1.1 KiB
Go
package stringx
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import "strings"
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type (
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// Replacer interface wraps the Replace method.
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Replacer interface {
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Replace(text string) string
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}
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replacer struct {
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node
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mapping map[string]string
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}
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)
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// NewReplacer returns a Replacer.
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func NewReplacer(mapping map[string]string) Replacer {
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var rep = &replacer{
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mapping: mapping,
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}
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for k := range mapping {
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rep.add(k)
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}
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return rep
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}
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func (r *replacer) Replace(text string) string {
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var builder strings.Builder
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var chars = []rune(text)
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var size = len(chars)
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var start = -1
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for i := 0; i < size; i++ {
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child, ok := r.children[chars[i]]
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if !ok {
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builder.WriteRune(chars[i])
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continue
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}
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if start < 0 {
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start = i
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}
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var end = -1
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if child.end {
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end = i + 1
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}
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var j = i + 1
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for ; j < size; j++ {
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grandchild, ok := child.children[chars[j]]
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if !ok {
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break
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}
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child = grandchild
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if child.end {
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end = j + 1
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i = j
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}
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}
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if end > 0 {
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i = j - 1
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builder.WriteString(r.mapping[string(chars[start:end])])
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} else {
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builder.WriteRune(chars[i])
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}
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start = -1
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}
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return builder.String()
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}
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