foundryvtt-reve-de-dragon/module/applications/sheets/common-item-sheet.mjs

const { HandlebarsApplicationMixin } = foundry.applications.api
import { SYSTEM_RDD } from "../../constants.js"
import { Misc } from "../../misc.js"
import { RdDSheetUtility } from "../../rdd-sheet-utility.js";


export default class RdDItemBaseSheet extends HandlebarsApplicationMixin(foundry.applications.sheets.ItemSheetV2) {

  static preloadHandlebars(...templatesList) {
    const handlebars = ["systems/foundryvtt-reve-de-dragon/templates/sheets/item/common/header.hbs"]
    templatesList.forEach(templates =>
      templates.forEach(t =>
        t.handlebars().forEach(h => handlebars.push(h))
      )
    )
    loadTemplates(Misc.distinct(handlebars))
  }
  
  static register(sheetClass) {
    const itemType = sheetClass.ITEM_TYPE
    Items.registerSheet(SYSTEM_RDD, sheetClass, {
      label: Misc.typeName('Item', itemType),
      types: [itemType],
      makeDefault: true
    })
  }
  
  static registerAll(...sheetClasses) {
    const handlebars = ["systems/foundryvtt-reve-de-dragon/templates/sheets/item/common/header.hbs"]
    sheetClasses.forEach(sheetClass => {
      sheetClass.TEMPLATES.forEach(t =>
        t.handlebars().forEach(h => handlebars.push(h))
      )
      const itemType = sheetClass.ITEM_TYPE
      Items.registerSheet(SYSTEM_RDD, sheetClass, {
        label: Misc.typeName('Item', itemType),
        types: [itemType],
        makeDefault: true
      })
    })
    loadTemplates(Misc.distinct(handlebars))
  }

  static get ITEM_TYPE() { return undefined }

  constructor(options = {}) {
    super(options)
  }

  static get TEMPLATES() { return [] }

  /** @override */
  static DEFAULT_OPTIONS = {
    classes: ["fvtt-rdd", "item"],
    position: {
      width: 600,
      height: "auto",
    },
    form: {
      submitOnChange: true,
    },
    window: {
      resizable: true,
    },
    actions: {
      editImage: RdDItemBaseSheet.#onEditImage,
    }
  }

  /** @override */
  async _prepareContext() {
    return {
      item: this.document,
      options: RdDSheetUtility.getOptions(this.document, this.isEditable),
      fields: this.document.schema.fields,
      systemFields: this.document.system.schema.fields,
      system: this.document.system,
      source: this.document.toObject(),
      isEditable: this.isEditable,
    }
  }

  // #region Actions

  /**
   * Handle changing a Document's image.
   *
   * @this RdDItemBaseSheet
   * @param {PointerEvent} event   The originating click event
   * @param {HTMLElement} target   The capturing HTML element which defined a [data-action]
   * @returns {Promise}
   * @private
   */
  static async #onEditImage(event, target) {
    const attr = target.dataset.edit
    const current = foundry.utils.getProperty(this.document, attr)
    const { img } = this.document.constructor.getDefaultArtwork?.(this.document.toObject()) ?? {}
    const fp = new FilePicker({
      current,
      type: "image",
      redirectToRoot: img ? [img] : [],
      callback: (path) => {
        this.document.update({ [attr]: path })
      },
      top: this.position.top + 40,
      left: this.position.left + 10,
    })
    return fp.browse()
  }
  // #endregion
}