60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
package ids
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// this package is at such a high level in the hierarchy because
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// it's used by both `server/db` (for now) and `server/ctrlsubsonic`
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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)
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var (
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ErrBadSeparator = errors.New("bad separator")
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ErrNotAnInt = errors.New("not an int")
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ErrBadPrefix = errors.New("bad prefix")
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)
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type ID string
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const (
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// type values copied from subsonic
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Artist ID = "ar"
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Album ID = "al"
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Track ID = "tr"
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)
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var accepted = []ID{Artist,
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Album,
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Track,
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}
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type IDV struct {
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Type ID
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Value int
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}
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func (i IDV) String() string {
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return fmt.Sprintf("%s-%d", i.Type, i.Value)
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}
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func Parse(in string) (IDV, error) {
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parts := strings.Split(in, "-")
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if len(parts) != 2 {
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return IDV{}, ErrBadSeparator
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}
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partType := parts[0]
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partValue := parts[1]
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val, err := strconv.Atoi(partValue)
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if err != nil {
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return IDV{}, fmt.Errorf("%q: %w", partValue, ErrNotAnInt)
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}
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for _, acc := range accepted {
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if partType == string(acc) {
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return IDV{Type: acc, Value: val}, nil
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}
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}
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return IDV{}, fmt.Errorf("%q: %w", partType, ErrBadPrefix)
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}
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