As a game developer, I want to map key presses to custom game actions or states so that I can drive game logic using high-level events

[modeswitch]

Conversation:

• An action is a notification that a high-level game event has been triggered
• Actions do not contain any state beyond the fact that they have happened
• A state is a notification plus a boolean state that a high-level game event has been triggered
• Both actions and states have associated event types
• Game actions can be generated in other ways than key presses; they may be generated by anything that can happen in the input phase. For example by AI or another player over the network.
• A set of individual hardware inputs are described as strings that are browser-independent, rather than key codes that are not
• Game developer calls resource loader to load event map
• Game developer constructs new input controller using event map resource
• Game developer adds input controller to entity, and it then generates game events based on the map
• An example of a map:

{
  "States": {
    "RunModifier": "SHIFT"
    "WalkForward": "W"
  },
  "Actions": {
    "FirePrimary": "SHIFT"
  }
}

• This is an extension that offers a dispatcher service, a controller component, and a map resource
• The service should register handlers for browser keyboard events
• Key presses are buffered by the service and dispatched during its run cycle each frame
• The controller is responsible for storing and making queryable values for mapped states