content access denied error during discovery: verify server access

will trigger a check of the server connectivity in case of content
access denied reporting when listing folders during discovery

should allow discovering early that terms of service need to be signed

Signed-off-by: Matthieu Gallien <matthieu.gallien@nextcloud.com>

src/gui/accountstate.h

@@ -229,6 +229,7 @@ private:
     bool _waitingForNewCredentials = false;
     QDateTime _timeOfLastETagCheck;
     QPointer<ConnectionValidator> _connectionValidator;
+    TermsOfServiceChecker _termsOfServiceChecker;
     QByteArray _notificationsEtagResponseHeader;
     QByteArray _navigationAppsEtagResponseHeader;
 

src/gui/connectionvalidator.cpp

@@ -42,7 +42,10 @@ ConnectionValidator::ConnectionValidator(AccountStatePtr accountState, const QSt
     , _previousErrors(previousErrors)
     , _accountState(accountState)
     , _account(accountState->account())
+    , _termsOfServiceChecker(_account)
 {
+    connect(&_termsOfServiceChecker, &TermsOfServiceChecker::done,
+            this, &ConnectionValidator::termsOfServiceCheckDone);
 }
 
 void ConnectionValidator::checkServerAndAuth()
@@ -306,6 +309,11 @@ bool ConnectionValidator::setAndCheckServerVersion(const QString &version)
     return true;
 }
 
+void ConnectionValidator::checkServerTermsOfService()
+{
+    _termsOfServiceChecker.start();
+}
+
 void ConnectionValidator::slotUserFetched(UserInfo *userInfo)
 {
     if(userInfo) {

src/gui/connectionvalidator.h

@@ -75,6 +75,37 @@ namespace OCC {
 
 class UserInfo;
 
+class TermsOfServiceChecker : public QObject
+{
+    Q_OBJECT
+
+    Q_PROPERTY(bool needToSign READ needToSign NOTIFY needToSignChanged FINAL)
+public:
+    explicit TermsOfServiceChecker(AccountPtr account,
+                                   QObject *parent = nullptr);
+
+    explicit TermsOfServiceChecker(QObject *parent = nullptr);
+
+    [[nodiscard]] bool needToSign() const;
+
+public slots:
+    void start();
+
+signals:
+    void needToSignChanged();
+
+    void done();
+
+private slots:
+    void slotServerTermsOfServiceRecieved(const QJsonDocument &reply);
+
+private:
+    void checkServerTermsOfService();
+
+    AccountPtr _account;
+    bool _needToSign = false;
+};
+
 class ConnectionValidator : public QObject
 {
     Q_OBJECT
@@ -144,10 +175,13 @@ private:
      */
     bool setAndCheckServerVersion(const QString &version);
 
+    void checkServerTermsOfService();
+
     const QStringList _previousErrors;
     QStringList _errors;
     AccountStatePtr _accountState;
     AccountPtr _account;
+    TermsOfServiceChecker _termsOfServiceChecker;
     bool _isCheckingServerAndAuth = false;
 
     void showSystrayErrorMessage();