58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package auth
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import (
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"context"
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"crypto/rand"
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"encoding/hex"
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"codeberg.org/nextgo/dbots/internal/db"
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"codeberg.org/nextgo/dbots/internal/discord"
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)
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type Service struct {
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q *db.Queries
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client *discord.Client
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}
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func NewService(q *db.Queries, client *discord.Client) *Service {
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return &Service{q: q, client: client}
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}
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// Callback exchanges the OAuth code for a Discord access token,
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// fetches the Discord user, and upserts them in the database.
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// It returns the db.User and the raw Discord access token
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// (needed so the caller can store it in the session if desired).
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func (s *Service) Callback(ctx context.Context, code string) (*db.User, *discord.TokenResponse, error) {
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tok, err := s.client.ExchangeCode(ctx, code)
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if err != nil {
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return nil, nil, err
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}
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dUser, err := s.client.GetCurrentUser(ctx, tok.AccessToken)
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if err != nil {
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return nil, nil, err
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}
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user, err := s.q.GetUser(ctx, dUser.ID)
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if err != nil {
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user, err = s.q.CreateUser(ctx, db.CreateUserParams{
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ID: dUser.ID,
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Username: dUser.Username,
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})
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if err != nil {
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return nil, nil, err
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}
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}
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return user, tok, nil
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}
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// GenerateState returns a cryptographically random hex string for
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// the OAuth2 state parameter.
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func GenerateState() (string, error) {
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b := make([]byte, 16)
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if _, err := rand.Read(b); err != nil {
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return "", err
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}
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return hex.EncodeToString(b), nil
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}
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