initial public commit

tools/auth/google.go

@@ -0,0 +1,52 @@
+package auth
+
+import (
+	"golang.org/x/oauth2"
+)
+
+var _ Provider = (*Google)(nil)
+
+// NameGoogle is the unique name of the Google provider.
+const NameGoogle string = "google"
+
+// Google allows authentication via Google OAuth2.
+type Google struct {
+	*baseProvider
+}
+
+// NewGoogleProvider creates new Google provider instance with some defaults.
+func NewGoogleProvider() *Google {
+	return &Google{&baseProvider{
+		scopes: []string{
+			"https://www.googleapis.com/auth/userinfo.profile",
+			"https://www.googleapis.com/auth/userinfo.email",
+		},
+		authUrl:    "https://accounts.google.com/o/oauth2/auth",
+		tokenUrl:   "https://accounts.google.com/o/oauth2/token",
+		userApiUrl: "https://www.googleapis.com/oauth2/v1/userinfo",
+	}}
+}
+
+// FetchAuthUser returns an AuthUser instance based the Google's user api.
+func (p *Google) FetchAuthUser(token *oauth2.Token) (*AuthUser, error) {
+	// https://cloud.google.com/identity-platform/docs/reference/rest/v1/UserInfo
+	rawData := struct {
+		LocalId     string `json:"localId"`
+		DisplayName string `json:"displayName"`
+		Email       string `json:"email"`
+		PhotoUrl    string `json:"photoUrl"`
+	}{}
+
+	if err := p.FetchRawUserData(token, &rawData); err != nil {
+		return nil, err
+	}
+
+	user := &AuthUser{
+		Id:        rawData.LocalId,
+		Name:      rawData.DisplayName,
+		Email:     rawData.Email,
+		AvatarUrl: rawData.PhotoUrl,
+	}
+
+	return user, nil
+}