Add support for openid with github and facebook

pwd/user.go

@@ -0,0 +1,43 @@
+package pwd
+
+import (
+	"github.com/play-with-docker/play-with-docker/pwd/types"
+	"github.com/play-with-docker/play-with-docker/storage"
+)
+
+func (p *pwd) UserNewLoginRequest(providerName string) (*types.LoginRequest, error) {
+	req := &types.LoginRequest{Id: p.generator.NewId(), Provider: providerName}
+	if err := p.storage.LoginRequestPut(req); err != nil {
+		return nil, err
+	}
+	return req, nil
+}
+
+func (p *pwd) UserGetLoginRequest(id string) (*types.LoginRequest, error) {
+	if req, err := p.storage.LoginRequestGet(id); err != nil {
+		return nil, err
+	} else {
+		return req, nil
+	}
+}
+
+func (p *pwd) UserLogin(loginRequest *types.LoginRequest, user *types.User) (*types.User, error) {
+	if err := p.storage.LoginRequestDelete(loginRequest.Id); err != nil {
+		return nil, err
+	}
+	u, err := p.storage.UserFindByProvider(user.Provider, user.ProviderUserId)
+	if err != nil {
+		if storage.NotFound(err) {
+			user.Id = p.generator.NewId()
+		} else {
+			return nil, err
+		}
+	} else {
+		user.Id = u.Id
+	}
+	if err := p.storage.UserPut(user); err != nil {
+		return nil, err
+	}
+
+	return user, nil
+}