Initial implementation for local echo

Each HistoryView maintains a list of pending events. Each pending
message is validated from the homeserver with either the returned
EventId or the body of the message.

Currently there is no support to remove invalid messages.

Also some small refactoring:
    - ChatPage doesn't know about the message being sent. The message
      delivery is solely handled by HistoryViewManager.
    - Nick coloring function moved to HistoryViewManager.

1 files changed, 81 insertions, 7 deletions

diff --git a/src/HistoryView.cc b/src/HistoryView.cc

index ce2e2f6c..f1e19aec 100644
--- a/src/HistoryView.cc
+++ b/src/HistoryView.cc
@@ -17,6 +17,7 @@
 
 #include <QDebug>
 #include <QScrollBar>
+#include <QSettings>
 #include <QtWidgets/QLabel>
 #include <QtWidgets/QSpacerItem>
 
@@ -51,18 +52,21 @@ void HistoryView::sliderRangeChanged(int min, int max)
 
 void HistoryView::addEvents(const QList<Event> &events)
 {
+	QSettings settings;
+	auto local_user = settings.value("auth/user_id").toString();
+
 	for (const auto &event : events) {
 		if (event.type() == "m.room.message") {
 			auto msg_type = event.content().value("msgtype").toString();
 
+			if (isPendingMessage(event, local_user)) {
+				removePendingMessage(event);
+				continue;
+			}
+
 			if (msg_type == "m.text" || msg_type == "m.notice") {
 				auto with_sender = last_sender_ != event.sender();
-				auto color = HistoryViewManager::NICK_COLORS.value(event.sender());
-
-				if (color.isEmpty()) {
-					color = HistoryViewManager::chooseRandomColor();
-					HistoryViewManager::NICK_COLORS.insert(event.sender(), color);
-				}
+				auto color = HistoryViewManager::getUserColor(event.sender());
 
 				addHistoryItem(event, color, with_sender);
 				last_sender_ = event.sender();
@@ -103,11 +107,81 @@ void HistoryView::init()
 
 void HistoryView::addHistoryItem(const Event &event, const QString &color, bool with_sender)
 {
-	// TODO: Probably create another function instead of passing the flag.
 	HistoryViewItem *item = new HistoryViewItem(event, with_sender, color, scroll_widget_);
 	scroll_layout_->addWidget(item);
 }
 
+void HistoryView::updatePendingMessage(int txn_id, QString event_id)
+{
+	for (auto &msg : pending_msgs_) {
+		if (msg.txn_id == txn_id) {
+			msg.event_id = event_id;
+			break;
+		}
+	}
+}
+
+bool HistoryView::isPendingMessage(const Event &event, const QString &userid)
+{
+	if (event.sender() != userid || event.type() != "m.room.message")
+		return false;
+
+	auto msgtype = event.content().value("msgtype").toString();
+	auto body = event.content().value("body").toString();
+
+	// FIXME: should contain more checks later on for other types of messages.
+	if (msgtype != "m.text")
+		return false;
+
+	for (const auto &msg : pending_msgs_) {
+		if (msg.event_id == event.eventId() || msg.body == body)
+			return true;
+	}
+
+	return false;
+}
+
+void HistoryView::removePendingMessage(const Event &event)
+{
+	auto body = event.content().value("body").toString();
+
+	for (auto it = pending_msgs_.begin(); it != pending_msgs_.end(); it++) {
+		int index = std::distance(pending_msgs_.begin(), it);
+
+		if (it->event_id == event.eventId() || it->body == body) {
+			pending_msgs_.removeAt(index);
+			break;
+		}
+	}
+}
+
+void HistoryView::addUserTextMessage(const QString &body, int txn_id)
+{
+	QSettings settings;
+	auto user_id = settings.value("auth/user_id").toString();
+
+	auto with_sender = last_sender_ != user_id;
+	auto color = HistoryViewManager::getUserColor(user_id);
+
+	HistoryViewItem *view_item;
+
+	if (with_sender)
+		view_item = new HistoryViewItem(user_id, color, body, scroll_widget_);
+	else
+		view_item = new HistoryViewItem(body, scroll_widget_);
+
+	scroll_layout_->addWidget(view_item);
+
+	last_sender_ = user_id;
+
+	PendingMessage message = {};
+	message.txn_id = txn_id;
+	message.body = body;
+	message.widget = view_item;
+
+	pending_msgs_.push_back(message);
+}
+
 HistoryView::~HistoryView()
 {
 }