Allow sending custom parameters in a token refresh

Add a new Stage to pass to the parameter modification call-back so
that the client code can recognize and adapt when preparing to
refresh an access token.

[ChangeLog][QAbstractAuth] Adds a token refresh stage
allowing parameters modification.

Task-number: QTBUG-59104
Change-Id: If6cd1349df163edd27ee083e82e6f537422574ca
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

3 files changed, 7 insertions, 1 deletions

diff --git a/src/oauth/qabstractoauth.cpp b/src/oauth/qabstractoauth.cpp
index 57a715d..9d88500 100644
--- a/src/oauth/qabstractoauth.cpp
+++ b/src/oauth/qabstractoauth.cpp
@@ -103,6 +103,9 @@ QT_BEGIN_NAMESPACE
 
     \value RequestingAccessToken            Preparing the token
     request.
+
+    \value RefreshingAccessToken            Preparing the access
+    token refresh.
 */
 
 /*!
diff --git a/src/oauth/qabstractoauth.h b/src/oauth/qabstractoauth.h
index a469e3b..c574875 100644
--- a/src/oauth/qabstractoauth.h
+++ b/src/oauth/qabstractoauth.h
@@ -80,7 +80,8 @@ public:
     enum class Stage {
         RequestingTemporaryCredentials,
         RequestingAuthorization,
-        RequestingAccessToken
+        RequestingAccessToken,
+        RefreshingAccessToken
     };
 
     enum class Error {
diff --git a/src/oauth/qoauth2authorizationcodeflow.cpp b/src/oauth/qoauth2authorizationcodeflow.cpp
index f171941..86d6707 100644
--- a/src/oauth/qoauth2authorizationcodeflow.cpp
+++ b/src/oauth/qoauth2authorizationcodeflow.cpp
@@ -328,6 +328,8 @@ void QOAuth2AuthorizationCodeFlow::refreshAccessToken()
     parameters.insert(Key::grantType, QStringLiteral("refresh_token"));
     parameters.insert(Key::refreshToken, d->refreshToken);
     parameters.insert(Key::redirectUri, QUrl::toPercentEncoding(callback()));
+    if (d->modifyParametersFunction)
+        d->modifyParametersFunction(Stage::RefreshingAccessToken, &parameters);
     query = QAbstractOAuthPrivate::createQuery(parameters);
     request.setHeader(QNetworkRequest::ContentTypeHeader,
                       QStringLiteral("application/x-www-form-urlencoded"));