daggerheart/module/applications/sheets/feature.mjs

import DaggerheartAction from '../../data/action.mjs';
import DaggerheartActionConfig from '../config/Action.mjs';
import DaggerheartSheet from './daggerheart-sheet.mjs';

const { ItemSheetV2 } = foundry.applications.sheets;
export default class FeatureSheet extends DaggerheartSheet(ItemSheetV2) {
    constructor(options={}){
        super(options);

        this.selectedEffectType = null;
    }
    
    static DEFAULT_OPTIONS = {
        tag: 'form',
        id: "daggerheart-feature",
        classes: ["daggerheart", "sheet", "feature"],
        position: { width: 600, height: 600 },
        actions: {
            addEffect: this.addEffect,
            removeEffect: this.removeEffect,
            addAction: this.addAction,
            editAction: this.editAction,
            removeAction: this.removeAction,
        },
        form: {
            handler: this.updateForm,
            submitOnChange: true,
            closeOnSubmit: false,
        },
    };
      
    static PARTS = {
        form: {
            id: "feature",
            template: "systems/daggerheart/templates/sheets/feature.hbs"
        }
    }

    _getTabs() {
        const tabs = {
            features: { active: true, cssClass: '', group: 'primary', id: 'features', icon: null, label: 'Features' },
            effects: { active: false, cssClass: '', group: 'primary', id: 'effects', icon: null, label: 'Effects' },
            actions: { active: false, cssClass: '', group: 'primary', id: 'actions', icon: null, label: 'Actions' },
        }
        for ( const v of Object.values(tabs) ) {
            v.active = this.tabGroups[v.group] ? this.tabGroups[v.group] === v.id : v.active;
            v.cssClass = v.active ? "active" : "";
        }

        return tabs;
    }

    _attachPartListeners(partId, htmlElement, options) {
        super._attachPartListeners(partId, htmlElement, options);
        $(htmlElement).find(".effect-select").on("change", this.effectSelect.bind(this));
    }

    async _prepareContext(_options) {
        const context = await super._prepareContext(_options);
        context.document = this.document;
        context.tabs = this._getTabs(),
        context.generalConfig = SYSTEM.GENERAL;
        context.itemConfig = SYSTEM.ITEM;
        context.properties = SYSTEM.ACTOR.featureProperties;
        context.dice = SYSTEM.GENERAL.diceTypes;
        context.selectedEffectType = this.selectedEffectType;
        context.effectConfig = SYSTEM.EFFECTS;

        return context;
    }

    static async updateForm(event, _, formData) {
        await this.document.update(formData.object)
        this.render();
    }

    effectSelect(event){
        this.selectedEffectType = event.currentTarget.value;
        this.render(true);
    }

    static async addEffect(){
        if(!this.selectedEffectType) return;
        
        const { id, name, ...rest } = SYSTEM.EFFECTS.effectTypes[this.selectedEffectType];
        const update = { 
            [foundry.utils.randomID()]: {
                type: this.selectedEffectType,
                value: '',
                ...rest
            } 
        };
        await this.item.update({ "system.effects": update });
    }

    static async removeEffect(_, button){
        const path = `system.effects.-=${button.dataset.effect}`;
        await this.item.update({ [path]: null });
    }

    static async addAction(){
        const action = await new DaggerheartAction({}, {parent: this.document});
        await this.document.update({ "system.actions": [...this.document.system.actions, action] });
        await (new DaggerheartActionConfig(this.document.system.actions[this.document.system.actions.length-1])).render(true);
    }

    static async editAction(_, button){
        const action = this.document.system.actions[button.dataset.index];
        await (new DaggerheartActionConfig(action)).render(true);
    }

    static async removeAction(event, button){
        event.stopPropagation();
        await this.document.update({ "system.actions": this.document.system.actions.filter((_, index) => index !== Number.parseInt(button.dataset.index)) });
    }
}