feat: setup UI endpoint to serve the UI

closes trustbloc#39

Signed-off-by: talwinder.kaur <talwinder.kaur@securekey.com>

pkg/restapi/operation/operations.go

@@ -12,13 +12,13 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"net/http"
-
 	"github.com/coreos/go-oidc"
 	"github.com/google/uuid"
 	"github.com/trustbloc/edge-core/pkg/log"
 	"github.com/trustbloc/edge-core/pkg/storage"
 	"golang.org/x/oauth2"
+	"net/http"
+	"net/url"
 
 	"github.com/trustbloc/hub-auth/pkg/bootstrap/user"
 	"github.com/trustbloc/hub-auth/pkg/internal/common/support"
@@ -27,6 +27,7 @@ import (
 const (
 	oauth2GetRequestPath = "/oauth2/request"
 	oauth2CallbackPath   = "/oauth2/callback"
+
 	// api path params
 	scopeQueryParam = "scope"
 
@@ -115,6 +116,7 @@ type Operation struct {
 	oidcClientID     string
 	oidcClientSecret string
 	oidcCallbackURL  string
+	uiEndpoint       string
 	oauth2ConfigFunc func(...string) oauth2Config
 	bootstrapStore   storage.Store
 }
@@ -127,6 +129,7 @@ type Config struct {
 	OIDCClientID           string
 	OIDCClientSecret       string
 	OIDCCallbackURL        string
+	UIEndpoint             string
 	TransientStoreProvider storage.Provider
 	StoreProvider          storage.Provider
 }
@@ -135,14 +138,15 @@ type createOIDCRequestResponse struct {
 	Request string `json:"request"`
 }
 
-// New returns rp operation instance.
+// New returns hub-auth operation instance.
 func New(config *Config) (*Operation, error) {
 	svc := &Operation{
 		client:           &http.Client{Transport: &http.Transport{TLSClientConfig: config.TLSConfig}},
 		requestTokens:    config.RequestTokens,
 		oidcClientID:     config.OIDCClientID,
 		oidcClientSecret: config.OIDCClientSecret,
 		oidcCallbackURL:  config.OIDCCallbackURL,
+		uiEndpoint:       config.UIEndpoint,
 	}
 
 	// TODO implement retries: https://github.com/trustbloc/hub-auth/issues/45
@@ -323,7 +327,15 @@ func (c *Operation) handleOIDCCallback(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	handleAuthResult(w, r, userProfile)
+	profileBytes, err := json.Marshal(userProfile)
+	if err != nil {
+		c.writeErrorResponse(w, http.StatusInternalServerError,
+			fmt.Sprintf("failed to marshal user profile data : %s", err))
+
+		return
+	}
+
+	c.handleAuthResult(w, r, profileBytes)
 }
 
 // TODO onboard user at key server and SDS: https://github.com/trustbloc/hub-auth/issues/38
@@ -340,9 +352,21 @@ func (c *Operation) onboardUser(id string) (*user.Profile, error) {
 	return userProfile, nil
 }
 
-// TODO redirect to the UI: https://github.com/trustbloc/hub-auth/issues/39
-func handleAuthResult(w http.ResponseWriter, r *http.Request, _ *user.Profile) {
-	http.Redirect(w, r, "", http.StatusFound)
+func (c *Operation) handleAuthResult(w http.ResponseWriter, r *http.Request, profileBytes []byte) {
+	handle := url.QueryEscape(uuid.New().String())
+
+	err := c.transientStore.Put(handle, profileBytes)
+	if err != nil {
+		c.writeErrorResponse(w,
+			http.StatusInternalServerError, fmt.Sprintf("failed to write handle to transient store : %s", err))
+
+		return
+	}
+
+	redirectURL := fmt.Sprintf("%s?up=%s", c.uiEndpoint, handle)
+
+	http.Redirect(w, r, redirectURL, http.StatusFound)
+	logger.Debugf("redirected to: %s", redirectURL)
 }
 
 func handleAuthError(w http.ResponseWriter, status int, msg string) {