smartlist: improve cache cleaning and avoid glitches

Interaction's cache is cleaned to avoid to store too much informations
and to refresh preferences for the chatview when necessary.
However, this was called too much times. We only need to clear cache
when the settings are changing or if we need to remove a lot of
conversations. This patch uses the SmartListItem to determine
what conversation needs to be cleaned.

Change-Id: I731bb9e7d41b140bbc2607800c1a8e0a1eff3244

src/lrcinstance.cpp

@@ -433,11 +433,7 @@ void
 LRCInstance::set_selectedConvUid(QString selectedConvUid)
 {
     if (selectedConvUid_ != selectedConvUid) {
-        auto& accInfo = accountModel().getAccountInfo(get_currentAccountId());
-        auto& convModel = accInfo.conversationModel;
-        convModel->clearInteractionsCache(selectedConvUid_);
-
         selectedConvUid_ = selectedConvUid;
         Q_EMIT selectedConvUidChanged();
     }
-}
+}

src/mainview/components/SmartListItemDelegate.qml

@@ -33,8 +33,23 @@ ItemDelegate {
     width: ListView.view.width
     height: JamiTheme.smartListItemHeight
 
-    function convUid() {
-        return UID
+    property string accountId: ""
+    property string convId: ""
+
+    onVisibleChanged: {
+        if (visible)
+            return
+        UtilsAdapter.clearInteractionsCache(root.accountId, root.convId)
+    }
+
+    Component.onCompleted: {
+        // Store to avoid undefined at the end
+        root.accountId = CurrentAccount.id
+        root.convId = UID
+    }
+
+    Component.onDestruction: {
+        UtilsAdapter.clearInteractionsCache(root.accountId, root.convId)
     }
 
     RowLayout {

src/utilsadapter.cpp

@@ -399,4 +399,16 @@ UtilsAdapter::monitor(const bool& continuous)
                                    Q_EMIT debugMessageReceived(data);
                                });
     lrcInstance_->monitor(continuous);
+}
+
+void
+UtilsAdapter::clearInteractionsCache(const QString& accountId, const QString& convId)
+{
+    if (lrcInstance_->get_selectedConvUid() != convId) {
+        try {
+            auto& accInfo = lrcInstance_->accountModel().getAccountInfo(accountId);
+            auto& convModel = accInfo.conversationModel;
+            convModel->clearInteractionsCache(convId);
+        } catch (...) {}
+    }
 }

src/utilsadapter.h

@@ -89,6 +89,7 @@ public:
     Q_INVOKABLE void setRunOnStartUp(bool state);
     Q_INVOKABLE void setDownloadPath(QString dir);
     Q_INVOKABLE void monitor(const bool& continuous);
+    Q_INVOKABLE void clearInteractionsCache(const QString& accountId, const QString& convUid);
 
 Q_SIGNALS:
     void debugMessageReceived(const QString& message);