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package suggest
import (
"strings"
"github.com/agext/levenshtein"
)
// WrapError wraps error with a suggestion for fixing it
func WrapError(err error, val string, options []string, caseSensitive bool) error {
if err == nil {
return nil
}
orig := val
if !caseSensitive {
val = strings.ToLower(val)
}
var match string
mindist := 3 // same as hcl
for _, opt := range options {
if !caseSensitive {
opt = strings.ToLower(opt)
}
if val == opt {
// exact match means error was unrelated to the value
return err
}
dist := levenshtein.Distance(val, opt, nil)
if dist < mindist {
if !caseSensitive {
match = matchCase(opt, orig)
} else {
match = opt
}
mindist = dist
}
}
if match == "" {
return err
}
return &suggestError{
err: err,
match: match,
}
}
type suggestError struct {
err error
match string
}
func (e *suggestError) Error() string {
return e.err.Error() + " (did you mean " + e.match + "?)"
}
// Unwrap returns the underlying error.
func (e *suggestError) Unwrap() error {
return e.err
}
func matchCase(val, orig string) string {
if orig == strings.ToLower(orig) {
return strings.ToLower(val)
}
if orig == strings.ToUpper(orig) {
return strings.ToUpper(val)
}
return val
}
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