added redirect_uri fetching from query param

handlers/google_auth.go

@@ -151,6 +151,7 @@ func checkUserAuthorization(userID, accessToken string) (bool, error) {
 }
 
 func GoogleLogin(w http.ResponseWriter, r *http.Request) {
+
 	helper.LogInfo(fmt.Sprintf("Generated oauth_state: %s", oauthStateString))
 
 	isSecure := strings.HasPrefix(os.Getenv("BACKEND_URL"), HTTPS)
@@ -314,10 +315,27 @@ func GoogleCallback(w http.ResponseWriter, r *http.Request) {
 	}
 
 	helper.LogInfo("Copy this access token: " + accessToken)
-	helper.RespondWithJSON(w, http.StatusOK, map[string]string{
-		"message":      "Authentication successful",
-		"access_token": accessToken,
-	})
+	// helper.RespondWithJSON(w, http.StatusOK, map[string]string{
+	// 	"message":      "Authentication successful",
+	// 	"access_token": accessToken,
+	// })
+
+	// RedirectBaseURL := "com.ph.gov.psa.uess.dev:/"
+	RedirectBaseURL := r.URL.Query().Get("redirect_uri")
+
+	if RedirectBaseURL == "" {
+		helper.LogError(errors.New("missing redirect_uri"), "redirect_uri is missing in request")
+		http.Error(w, "Missing redirect_uri", http.StatusBadRequest)
+		return
+	}
+
+	if !IsAllowedRedirectURI(RedirectBaseURL) {
+		http.Error(w, "Invalid redirect_uri", http.StatusBadRequest)
+		return
+	}
+
+	RedirectURL := fmt.Sprintf("%s/callback?token=%s&user_id=%s", RedirectBaseURL, accessToken, userID)
+	http.Redirect(w, r, RedirectURL, http.StatusSeeOther)
 }
 
 func validateState(w http.ResponseWriter, r *http.Request) bool {