mirror of
https://github.com/mxpv/podsync.git
synced 2024-05-11 05:55:04 +00:00
48 lines
943 B
Go
48 lines
943 B
Go
package id
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import (
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"hash/fnv"
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"github.com/mxpv/podsync/web/pkg/storage"
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hd "github.com/speps/go-hashids"
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)
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const (
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minLength = 4
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salt = "mVJIX8cDWQJ71oMw6xw9yYV9TA1rojDcKrhUaOqEfaE"
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alphabet = "abcdefghijklmnopqrstuvwxyz1234567890"
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)
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type hashId struct {
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hid *hd.HashID
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}
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func hashString(s string) int {
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h := fnv.New32a()
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h.Write([]byte(s))
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return int(h.Sum32())
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}
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func (h *hashId) Encode(feed *storage.Feed) (string, error) {
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// Don't create duplicate urls for same playlist/settings
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// https://github.com/podsync/issues/issues/6
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numbers := []int{
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hashString(feed.UserId),
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hashString(feed.URL),
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feed.PageSize,
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hashString(string(feed.Quality)),
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hashString(string(feed.Format)),
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}
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return h.hid.Encode(numbers)
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}
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func NewIdGenerator() (*hashId, error) {
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data := hd.NewData()
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data.MinLength = minLength
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data.Salt = salt
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data.Alphabet = alphabet
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hid := hd.NewWithData(data)
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return &hashId{hid}, nil
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}
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