diffdown.com
Diffdown is a real-time collaborative Markdown editor/previewer built on the AT Protocol
diffdown.com
1package collaboration
2
3import (
4 "crypto/rand"
5 "crypto/sha256"
6 "encoding/hex"
7 "fmt"
8 "time"
9
10 "github.com/limeleaf/diffdown/internal/db"
11 "github.com/limeleaf/diffdown/internal/model"
12)
13
14func GenerateInviteToken() (string, error) {
15 bytes := make([]byte, 32)
16 if _, err := rand.Read(bytes); err != nil {
17 return "", err
18 }
19 hash := sha256.Sum256(bytes)
20 return hex.EncodeToString(hash[:]), nil
21}
22
23func CreateInvite(database *db.DB, documentRKey, createdByDID string) (*model.Invite, error) {
24 token, err := GenerateInviteToken()
25 if err != nil {
26 return nil, err
27 }
28
29 invite := &model.Invite{
30 ID: db.NewID(),
31 DocumentRKey: documentRKey,
32 Token: token,
33 CreatedBy: createdByDID,
34 CreatedAt: time.Now(),
35 ExpiresAt: time.Now().Add(7 * 24 * time.Hour),
36 }
37
38 err = database.CreateInvite(invite)
39 return invite, err
40}
41
42func ValidateInvite(database *db.DB, token, documentRKey string) (*model.Invite, error) {
43 invite, err := database.GetInviteByToken(token)
44 if err != nil {
45 return nil, err
46 }
47 if invite.DocumentRKey != documentRKey {
48 return nil, fmt.Errorf("invite does not match document")
49 }
50 if time.Now().After(invite.ExpiresAt) {
51 return nil, fmt.Errorf("invite expired")
52 }
53 return invite, nil
54}