contactmodel: move profile creation on dedicated thread

This avoid a heavy I/O operation on the main pool

Change-Id: Ic5068d9d1c291b8f27ffc563933d4920af42e890
GitLab: #1450

src/libclient/contactmodel.cpp

@@ -23,6 +23,8 @@
 
 #include "api/contactmodel.h"
 
+#include <QThreadPool>
+
 // LRC
 #include "api/account.h"
 #include "api/contact.h"
@@ -121,6 +123,8 @@ public:
     QString searchStatus_ {};
     QMap<QString, QString> nonContactLookup_;
 
+    QThreadPool profileThreadPool;
+
 public Q_SLOTS:
     /**
      * Listen CallbacksHandler when a presence update occurs
@@ -690,6 +694,7 @@ ContactModelPimpl::~ContactModelPimpl()
                &ConfigurationManagerInterface::userSearchEnded,
                this,
                &ContactModelPimpl::slotUserSearchEnded);
+    profileThreadPool.waitForDone();
 }
 
 bool
@@ -1196,6 +1201,7 @@ ContactModelPimpl::slotProfileReceived(const QString& accountId,
     if (accountId != linked.owner.id)
         return;
 
+    profileThreadPool.start([=] {
         QFile vCardFile(path);
         if (!vCardFile.open(QIODevice::ReadOnly | QIODevice::Text))
             return;
@@ -1234,6 +1240,7 @@ ContactModelPimpl::slotProfileReceived(const QString& accountId,
 
         linked.owner.contactModel->addContact(contactInfo);
         contactInfo.profileInfo.avatar.clear(); // Do not store after update
+    });
 }
 
 void