conversationmodel: add interaction cache clear function

jami-client-qt#550

Change-Id: Ib4366178408171ab54a57508ad4fe2311b18fd95

src/api/conversationmodel.h

@@ -258,6 +258,11 @@ public:
      * @param interactionId
      */
     void clearInteractionFromConversation(const QString& convId, const QString& interactionId);
+    /**
+     * Clear the cache for interactions in the conversation
+     * @param convId
+     */
+    void clearInteractionsCache(const QString& convId);
     /**
      * Retry to send a message. In fact, will delete the previous interaction and resend a new one.
      * @param convId

src/conversationmodel.cpp

@@ -1324,6 +1324,27 @@ ConversationModel::clearInteractionFromConversation(const QString& convId,
     }
 }
 
+void
+ConversationModel::clearInteractionsCache(const QString& convId)
+{
+    auto conversationIdx = pimpl_->indexOf(convId);
+    if (conversationIdx == -1)
+        return;
+
+    try {
+        auto& conversation = pimpl_->conversations.at(conversationIdx);
+        {
+            std::lock_guard<std::mutex> lk(pimpl_->interactionsLocks[convId]);
+            conversation.interactions->clear(1);
+        }
+        conversation.allMessagesLoaded = false;
+        conversation.lastMessageUid = conversation.interactions->last().first;
+    } catch (const std::out_of_range& e) {
+        qDebug() << "can't find interaction from conversation: " << e.what();
+        return;
+    }
+}
+
 void
 ConversationModel::retryInteraction(const QString& convId, const QString& interactionId)
 {

src/messagelistmodel.cpp

@@ -157,9 +157,9 @@ MessageListModel::size() const
 }
 
 void
-MessageListModel::clear()
+MessageListModel::clear(int leaveN)
 {
-    interactions_.clear();
+    interactions_.erase(interactions_.begin(), std::prev(interactions_.end(), leaveN));
 }
 
 bool

src/messagelistmodel.h

@@ -87,7 +87,7 @@ public:
     constIterator begin() const;
     reverseIterator rbegin();
     int size() const;
-    void clear();
+    void clear(int leaveN = 0);
     bool empty() const;
     interaction::Info at(const QString& intId) const;
     QPair<QString, interaction::Info> front() const;