initial public commit

tools/auth/gitlab.go

@@ -0,0 +1,51 @@
+package auth
+
+import (
+	"strconv"
+
+	"golang.org/x/oauth2"
+)
+
+var _ Provider = (*Gitlab)(nil)
+
+// NameGitlab is the unique name of the Gitlab provider.
+const NameGitlab string = "gitlab"
+
+// Gitlab allows authentication via Gitlab OAuth2.
+type Gitlab struct {
+	*baseProvider
+}
+
+// NewGitlabProvider creates new Gitlab provider instance with some defaults.
+func NewGitlabProvider() *Gitlab {
+	return &Gitlab{&baseProvider{
+		scopes:     []string{"read_user"},
+		authUrl:    "https://gitlab.com/oauth/authorize",
+		tokenUrl:   "https://gitlab.com/oauth/token",
+		userApiUrl: "https://gitlab.com/api/v4/user",
+	}}
+}
+
+// FetchAuthUser returns an AuthUser instance based the Gitlab's user api.
+func (p *Gitlab) FetchAuthUser(token *oauth2.Token) (*AuthUser, error) {
+	// https://docs.gitlab.com/ee/api/users.html#for-admin
+	rawData := struct {
+		Id        int    `json:"id"`
+		Name      string `json:"name"`
+		Email     string `json:"email"`
+		AvatarUrl string `json:"avatar_url"`
+	}{}
+
+	if err := p.FetchRawUserData(token, &rawData); err != nil {
+		return nil, err
+	}
+
+	user := &AuthUser{
+		Id:        strconv.Itoa(rawData.Id),
+		Name:      rawData.Name,
+		Email:     rawData.Email,
+		AvatarUrl: rawData.AvatarUrl,
+	}
+
+	return user, nil
+}