54 lines
1015 B
Go
54 lines
1015 B
Go
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package cachex
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import (
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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)
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type ValueCodec[V any] interface {
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Encode(v V) (string, error)
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Decode(s string) (V, error)
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}
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type IntCodec struct{}
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func (c IntCodec) Encode(v int) (string, error) {
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return strconv.Itoa(v), nil
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}
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func (c IntCodec) Decode(s string) (int, error) {
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s = strings.TrimSpace(s)
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if s == "" {
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return 0, fmt.Errorf("empty int value")
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}
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return strconv.Atoi(s)
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}
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type StringCodec struct{}
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func (c StringCodec) Encode(v string) (string, error) { return v, nil }
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func (c StringCodec) Decode(s string) (string, error) { return s, nil }
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type JSONCodec[V any] struct{}
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func (c JSONCodec[V]) Encode(v V) (string, error) {
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b, err := json.Marshal(v)
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if err != nil {
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return "", err
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}
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return string(b), nil
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}
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func (c JSONCodec[V]) Decode(s string) (V, error) {
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var v V
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if strings.TrimSpace(s) == "" {
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return v, fmt.Errorf("empty json value")
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}
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if err := json.Unmarshal([]byte(s), &v); err != nil {
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return v, err
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}
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return v, nil
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}
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