mirror of https://github.com/pikami/cosmium.git
42 lines
820 B
Go
42 lines
820 B
Go
package resourceid
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import (
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"encoding/base64"
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"math/rand"
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"github.com/google/uuid"
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)
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func New() string {
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id := uuid.New().ID()
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idBytes := uintToBytes(id)
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// first byte should be bigger than 0x80 for collection ids
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// clients classify this id as "user" otherwise
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if (idBytes[0] & 0x80) <= 0 {
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idBytes[0] = byte(rand.Intn(0x80) + 0x80)
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}
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return base64.StdEncoding.EncodeToString(idBytes)
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}
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func NewCombined(ids ...string) string {
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combinedIdBytes := make([]byte, 0)
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for _, id := range ids {
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idBytes, _ := base64.StdEncoding.DecodeString(id)
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combinedIdBytes = append(combinedIdBytes, idBytes...)
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}
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return base64.StdEncoding.EncodeToString(combinedIdBytes)
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}
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func uintToBytes(id uint32) []byte {
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buf := make([]byte, 4)
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for i := 0; i < 4; i++ {
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buf[i] = byte(id >> (i * 8))
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}
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return buf
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}
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