Directly calling signals is the supported way to send signals.
Calling signal handlers worked in the past, but will be phased out in
the future (https://bugreports.qt.io/browse/QTBUG-120573).
Refactor `LinkPreviewer` to take an event and put the functions for getting the link in the class itself. This means the functions in `EventHandler` are no longer required.
This mr also sets up `LinkPreviewer` so that it is automatically updated when an event is edited. This includes changing the link if edited, and it can handle a message having a previous link removed or a one added when one didn't exist before.
Also adds test suite.
Currently we effectively create the reactions list in EventHandler then pass that data into a model. This reworks the model so that we just pass in a room and an event and it grabs it's own data. This means that:
- the functions in event handler are no longer required
- the model can update itself to add/remove reactions so no need to handle that in MessageEventModel
- MessageEventModel only needs to create new ReactionModels or remove old ones when no reactions exist anymore
A basic test suite has also been created for the ReactionModel
Refactor PollHandler to make it more reliable. This ended up with much more code than I expected as the original intent was just to stop a crash when switching rooms.
- Using a event string was flaky, changing to using an event reference is more reliable.
- Since we're only creating them from NeoChatRoom there is no need to to be able to set properties from QML so only read properties.
- Pass from the MessageEventModel rather than an invokable method.
- Create a basic test suite
- Create properties in PollHandler to remove the need to use content in PollDelegate, this means content is no longer a required role.
The fixes include:
- improving the timer to make it more reliable
- making sure a read marker is added when changin rooms, this is needed when the messages have already been loaded.
- increase the default timer to 10s to avoid the read marker disappearing and being re-added when a message arrive in quick succession.
BUG: 465300
