1 files changed, 27 insertions, 0 deletions
diff --git a/server/auth/provider.go b/server/auth/provider.go
new file mode 100644
index 0000000..ae512bd
--- /dev/null
+++ b/server/auth/provider.go
@@ -0,0 +1,27 @@
+package auth
+
+import "golang.org/x/oauth2"
+
+type Provider interface {
+	Name() string
+	StartSession(string) *Session
+	Exchange(string) (*oauth2.Token, error)
+	Username(*oauth2.Token) string
+	Valid(*oauth2.Token) bool
+	Revoke(*oauth2.Token) error
+}
+
+type Session struct {
+	AuthURL string
+	Token   *oauth2.Token
+	State   string
+}
+
+func (s *Session) Authorize(provider Provider, code string) error {
+	t, err := provider.Exchange(code)
+	if err != nil {
+		return err
+	}
+	s.Token = t
+	return nil
+}