fvtt-cthulhu-eternal/module/applications/hud/system-manager.js

// System Module Imports
import { ActionHandler } from './action-handler.js'
import { RollHandler as Core } from './roll-handler.js'
import { SYSTEM } from './constants.js'
import { DEFAULTS } from './defaults.js'

export let SystemManager = null

Hooks.once('tokenActionHudCoreApiReady', async (coreModule) => {
    /**
     * Extends Token Action HUD Core's SystemManager class
     */
    SystemManager = class SystemManager extends coreModule.api.SystemManager {
        /**
         * Returns an instance of the ActionHandler to Token Action HUD Core
         * Called by Token Action HUD Core
         * @override
         * @returns {class} The ActionHandler instance
         */
        getActionHandler () {
            return new ActionHandler()
        }

        /**
         * Returns a list of roll handlers to Token Action HUD Core
         * Used to populate the Roll Handler module setting choices
         * Called by Token Action HUD Core
         * @override
         * @returns {object} The available roll handlers
         */
        getAvailableRollHandlers () {
            const coreTitle = 'Core Template'
            const choices = { core: coreTitle }
            return choices
        }

        /**
         * Returns an instance of the RollHandler to Token Action HUD Core
         * Called by Token Action HUD Core
         * @override
         * @param {string} rollHandlerId The roll handler ID
         * @returns {class}              The RollHandler instance
         */
        getRollHandler (rollHandlerId) {
            let rollHandler
            switch (rollHandlerId) {
            case 'core':
            default:
                rollHandler = new Core()
                break
            }
            return rollHandler
        }

        /**
         * Returns the default layout and groups to Token Action HUD Core
         * Called by Token Action HUD Core
         * @returns {object} The default layout and groups
         */
        async registerDefaults () {
            return DEFAULTS
        }

        /**
         * Register Token Action HUD system module settings
         * Called by Token Action HUD Core
         * @override
         * @param {function} coreUpdate The Token Action HUD Core update function
         */
        registerSettings (coreUpdate) {
            /*systemSettings.register(coreUpdate)*/
        }

        /**
         * Returns styles to Token Action HUD Core
         * Called by Token Action HUD Core
         * @override
         * @returns {object} The TAH system styles
         */
        registerStyles () {
            return {
                template: {
                    class: 'tah-style-template-style', // The class to add to first DIV element
                    file: 'tah-template-style', // The file without the css extension
                    moduleId: SYSTEM.ID, // The module ID
                    name: 'Template Style' // The name to display in the Token Action HUD Core 'Style' module setting
                }
            }
        }
    }
})