onasty/internal/service/usersrv/oauth.go (view raw)
Smirnov Oleksandr
Smirnov Oleksandr
ss2316544@gmail.com feat: add oauth2 login for google and github (#109)..., 1 year ago
ss2316544@gmail.com feat: add oauth2 login for google and github (#109)..., 1 year ago
| 1 | package usersrv |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "errors" |
| 6 | "log/slog" |
| 7 | "strings" |
| 8 | "time" |
| 9 | |
| 10 | "github.com/gofrs/uuid/v5" |
| 11 | "github.com/olexsmir/onasty/internal/dtos" |
| 12 | "github.com/olexsmir/onasty/internal/models" |
| 13 | "github.com/olexsmir/onasty/internal/oauth" |
| 14 | ) |
| 15 | |
| 16 | var ErrProviderNotSupported = errors.New("oauth2 provider not supported") |
| 17 | |
| 18 | const ( |
| 19 | googleProvider = "google" |
| 20 | githubProvider = "github" |
| 21 | ) |
| 22 | |
| 23 | func (u *UserSrv) GetOAuthURL(providerName string) (string, error) { |
| 24 | switch providerName { |
| 25 | case googleProvider: |
| 26 | return u.googleOauth.GetAuthURL(""), nil |
| 27 | case githubProvider: |
| 28 | return u.githubOauth.GetAuthURL(""), nil |
| 29 | default: |
| 30 | return "", ErrProviderNotSupported |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | func (u *UserSrv) HandleOAuthLogin( |
| 35 | ctx context.Context, |
| 36 | providerName, code string, |
| 37 | ) (dtos.Tokens, error) { |
| 38 | userInfo, err := u.getUserInfoBasedOnProvider(ctx, providerName, code) |
| 39 | if err != nil { |
| 40 | return dtos.Tokens{}, err |
| 41 | } |
| 42 | |
| 43 | userID, err := u.getUserByOAuthIDOrCreateOne(ctx, userInfo) |
| 44 | if err != nil { |
| 45 | return dtos.Tokens{}, err |
| 46 | } |
| 47 | |
| 48 | if err = u.userstore.LinkOAuthIdentity(ctx, userID, userInfo.Provider, userInfo.ProviderID); err != nil { |
| 49 | slog.ErrorContext(ctx, "failed to link user identity", "user_id", userID, "err", err) |
| 50 | return dtos.Tokens{}, err |
| 51 | } |
| 52 | |
| 53 | tokens, err := u.issueTokens(ctx, userID) |
| 54 | |
| 55 | return tokens, err |
| 56 | } |
| 57 | |
| 58 | func (u *UserSrv) getUserInfoBasedOnProvider( |
| 59 | ctx context.Context, |
| 60 | providerName, code string, |
| 61 | ) (oauth.UserInfo, error) { |
| 62 | var userInfo oauth.UserInfo |
| 63 | var err error |
| 64 | |
| 65 | switch providerName { |
| 66 | case googleProvider: |
| 67 | userInfo, err = u.googleOauth.ExchangeCode(ctx, code) |
| 68 | case githubProvider: |
| 69 | userInfo, err = u.githubOauth.ExchangeCode(ctx, code) |
| 70 | default: |
| 71 | return oauth.UserInfo{}, ErrProviderNotSupported |
| 72 | } |
| 73 | |
| 74 | return userInfo, err |
| 75 | } |
| 76 | |
| 77 | func getUsernameFromEmail(email string) string { |
| 78 | p := strings.Split(email, "@") |
| 79 | return p[0] |
| 80 | } |
| 81 | |
| 82 | func (u *UserSrv) getUserByOAuthIDOrCreateOne( |
| 83 | ctx context.Context, |
| 84 | info oauth.UserInfo, |
| 85 | ) (uuid.UUID, error) { |
| 86 | user, err := u.userstore.GetByOAuthID(ctx, info.Provider, info.ProviderID) |
| 87 | if err != nil { |
| 88 | if errors.Is(err, models.ErrUserNotFound) { |
| 89 | uid, cerr := u.userstore.Create(ctx, models.User{ |
| 90 | ID: uuid.Nil, |
| 91 | Username: getUsernameFromEmail(info.Email), |
| 92 | Email: info.Email, |
| 93 | Activated: true, |
| 94 | Password: "", |
| 95 | CreatedAt: time.Now(), |
| 96 | LastLoginAt: time.Now(), |
| 97 | }) |
| 98 | return uid, cerr |
| 99 | } |
| 100 | return uuid.Nil, err |
| 101 | } |
| 102 | |
| 103 | return user.ID, nil |
| 104 | } |