42 lines
985 B
Go
42 lines
985 B
Go
package threema
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import (
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"encoding/base32"
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"fmt"
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"strings"
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"github.com/o3ma/o3"
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"gosrc.io/xmpp"
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)
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func strFromThreemaGroup(header *o3.GroupMessageHeader) string {
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cid := strings.ToLower(header.CreatorID.String())
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gid := strings.ToLower(base32.StdEncoding.EncodeToString(header.GroupID[:]))
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return fmt.Sprintf("%s-%s", cid, gid)
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}
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func jidFromThreemaGroup(sender string, header *o3.GroupMessageHeader) string {
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return fmt.Sprintf("%s@{{DOMAIN}}/%s", strFromThreemaGroup(header), sender)
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}
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func jidToThreemaGroup(jidS string) (string, *o3.GroupMessageHeader) {
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jid, err := xmpp.NewJid(jidS)
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if err != nil {
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return "", nil
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}
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node := strings.ToUpper(jid.Node)
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a := strings.SplitN(node, "-", 2)
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if len(a) != 2 {
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return "", nil
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}
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header := &o3.GroupMessageHeader{
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CreatorID: o3.NewIDString(a[0]),
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}
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result, err := base32.StdEncoding.DecodeString(a[1])
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if err != nil {
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return "", nil
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}
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copy(header.GroupID[:], []byte(result))
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return jid.Resource, header
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}
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