Plugin System about openmu

[sven-n]

I have an idea for an additional use case for plugins, as a replacement for IPlayerView etc. which defines dozens of methods and “sub-views”. All these methods could be extracted into single plugin interfaces, instead. This way, network messages for different client versions could be implemented by different plugins.
The server could hold all active plugins for each connected player. When a player connects, the server could select/create the right plugins for the specific client version. So it should even be possible that different players can connect with different client versions to the same server.

I already have a rough idea about how to implement this :)

[sven-n]

Merged #91. See Readme of the added MUnique.OpenMU.PlugIns project for the documentation.

Next steps:

• Creating Plugin interfaces/points for game logic
• Creating a way to write and integrate view-plugins, packet handler plugins and network-related plugins (encryption)
• A way to configure plugins on the AdminPanel

Nice to have:

• A user interface on the AdminPanel to create new custom plugins
  • User selects plugin type
  • A template is generated and shown in an editor (e.g. CodeMirror)
  • When the user saves, it’s compiled (Roslyn) and added to the plugin configuration

[sven-n]

Refactored packet handlers into plugins with #105

[sven-n]

I’m currently close in getting multi client support. That means players with different client versions and therefore different network protocols will be able to join the same server instance and interact with each other.
However, to support other clients than season 6, it’s required to review all existing packet handler and view plugins and add new ones for those which need different packet structures.
I think I’ll start adding support for some lower versions first. I had version 0.75 (nostalgic 😉) and 0.97d in mind.
Higher seasons are a bit problematic as it will require to add actual features which might require additional player state (transient and persistent), too.
Season 3, 4 and probably 5 are difficult as well, because of a different master skill tree structure.

[sven-n]

Basically solved by #108.

A code editor in the admin panel would be nice to have, but I think it's too early for now. So, I'll close this issue.