daggerheart/module/applications/sheets/environment.mjs

import DaggerheartSheet from "./daggerheart-sheet.mjs";

const { DocumentSheetV2 } = foundry.applications.api;
export default class DhpEnvironment extends DaggerheartSheet(DocumentSheetV2) {

    constructor(options){
        super(options);

        this.editMode = false;
    }

    static DEFAULT_OPTIONS = {
        tag: 'form',
        classes: ["daggerheart", "sheet", "adversary", "environment"],
        position: {
          width: 600,
          height: "auto"
        },
        actions: {
            toggleSlider: this.toggleSlider,
            viewFeature: this.viewFeature,
            addFeature: this.addFeature,
            removeFeature: this.removeFeature,
            addTone: this.addTone,
            removeTone: this.removeTone,
            useFeature: this.useFeature,
        },
        form: {
          handler: this._updateForm,
          closeOnSubmit: false,
          submitOnChange: true,
        }
    };
    
    /** @override */
    static PARTS = {
        form: {
            id: "form",
            template: "systems/daggerheart/templates/sheets/environment.hbs"
        }
    }

    /* -------------------------------------------- */

    /** @inheritDoc */
    get title() {
        return `${game.i18n.localize('Environment')} - ${this.document.name}`;
    }

    async _prepareContext(_options) {
        return {
          title: `${this.document.name} - ${game.i18n.localize(SYSTEM.ACTOR.adversaryTypes[this.document.system.type].name)}`,
          user: this.document,
          source: this.document.toObject(),
          fields: this.document.schema.fields,
          data: {
            type: game.i18n.localize(SYSTEM.ACTOR.adversaryTypes[this.document.system.type].name),
            features: this.document.items.reduce((acc, x) => {
                if(x.type === 'feature'){
                    const feature = x.toObject();
                    acc.push({
                        ...feature,
                        system: {
                            ...feature.system,
                            actionType: game.i18n.localize(SYSTEM.ITEM.actionTypes[feature.system.actionType].name)
                        },
                        uuid: x.uuid
                    });
                }

                return acc;
            }, []),
          },
          editMode: this.editMode,
          config: SYSTEM,
        }
    }

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

    static toggleSlider(){
        this.editMode = !this.editMode;
        this.render();
    }

    static async viewFeature(_, button){
        const move = await fromUuid(button.dataset.feature);
        move.sheet.render(true);
    }

    static async addFeature(){
        const result = await this.document.createEmbeddedDocuments("Item", [{
            name: game.i18n.localize('DAGGERHEART.Sheets.Environment.NewFeature'),
            type: 'feature',
        }]);

        await result[0].sheet.render(true);
    }

    static async removeFeature(_, button){
        await this.document.items.find(x => x.uuid === button.dataset.feature).delete();
    }

    static async addTone(){
        await this.document.update({ "system.toneAndFeel": [...this.document.system.toneAndFeel, ''] });
    }

    static async removeTone(button){
        await this.document.update({ "system.toneAndFeel": this.document.system.toneAndFeel.filter((_, index) => index !== Number.parseInt(button.dataset.tone) )});
    }

    static async useFeature(_, button){
        const item = this.document.items.find(x => x.uuid === button.dataset.feature);

        const cls = getDocumentClass("ChatMessage");
        const msg = new cls({
            user: game.user.id,
            content: await renderTemplate("systems/daggerheart/templates/chat/ability-use.hbs", {
                title: game.i18n.format("DAGGERHEART.Chat.EnvironmentTitle", { actionType: button.dataset.actionType }),
                card: { name: item.name, img: item.img, description: item.system.description },
            }),
        });

        cls.create(msg.toObject());
    }
}