bootstrap-italia/src/js/plugins/upload-dragdrop.js

Bootstrap Italia è un tema Bootstrap 5 per la creazione di applicazioni web nel pieno rispetto delle linee guida di design per i siti internet e i servizi digitali della PA

/**
 * --------------------------------------------------------------------------
 * Bootstrap Italia (https://italia.github.io/bootstrap-italia/)
 * Authors: https://github.com/italia/bootstrap-italia/blob/main/AUTHORS
 * Licensed under BSD-3-Clause license (https://github.com/italia/bootstrap-italia/blob/main/LICENSE)
 * --------------------------------------------------------------------------
 */

import BaseComponent from './base-component.js'

import EventHandler from './dom/event-handler'
import SelectorEngine from './dom/selector-engine'

import ProgressDonut from './progress-donut'

const NAME = 'upload'
const DATA_KEY = 'bs.upload'
const EVENT_KEY = `.${DATA_KEY}`
const DATA_API_KEY = '.data-api'

const EVENT_CLICK_DATA_API = `click${EVENT_KEY}${DATA_API_KEY}`

const EVENT_DRAG = `drag`
const EVENT_DRAG_START = `dragstart`
const EVENT_DRAG_END = `dragend`
const EVENT_DRAG_OVER = `dragover`
const EVENT_DRAG_ENTER = `dragenter`
const EVENT_DRAG_LEAVE = `dragleave`
const EVENT_DROP = `drop`

const CLASS_NAME_SUCCESS = 'success'
const CLASS_NAME_DRAGOVER = 'dragover'
const CLASS_NAME_LOADING = 'loading'

const SELECTOR_FORM = '[data-bs-upload-dragdrop]'
const SELECTOR_DONUT = '[data-bs-progress-donut]'

class UploadDragDrop extends BaseComponent {
  constructor(element) {
    super(element)

    const donutElement = SelectorEngine.findOne(SELECTOR_DONUT, this._element)
    if (donutElement) {
      this._donut = ProgressDonut.getOrCreateInstance(donutElement)
    }

    this._bindEvents()
  }

  // Getters

  static get NAME() {
    return NAME
  }

  // Public
  progress(value) {
    this._donut.set(value)
  }

  start() {
    this.reset()
    this._element.classList.add(CLASS_NAME_LOADING)
  }

  success() {
    this._element.classList.remove(CLASS_NAME_LOADING)
    this._element.classList.add(CLASS_NAME_SUCCESS)
  }

  reset() {
    this._element.classList.remove(CLASS_NAME_LOADING)
    this._element.classList.remove(CLASS_NAME_SUCCESS)
    this._donut.set(0)
  }

  dispose() {
    this._donut.dispose()

    super.dispose()
  }

  // Private
  _bindEvents() {
    EventHandler.on(this._element, EVENT_DRAG, (evt) => this._preventEvent(evt))
    EventHandler.on(this._element, EVENT_DRAG_START, (evt) => this._preventEvent(evt))
    EventHandler.on(this._element, EVENT_DRAG_END, (evt) => this._preventEvent(evt))
    EventHandler.on(this._element, EVENT_DRAG_OVER, (evt) => this._preventEvent(evt))
    EventHandler.on(this._element, EVENT_DRAG_ENTER, (evt) => this._preventEvent(evt))
    EventHandler.on(this._element, EVENT_DRAG_LEAVE, (evt) => this._preventEvent(evt))
    EventHandler.on(this._element, EVENT_DROP, (evt) => this._preventEvent(evt))

    EventHandler.on(this._element, EVENT_DRAG_OVER, () => this._dropIn())
    EventHandler.on(this._element, EVENT_DRAG_ENTER, () => this._dropIn())
    EventHandler.on(this._element, EVENT_DRAG_LEAVE, () => this._dropOut())
    EventHandler.on(this._element, EVENT_DRAG_END, () => this._dropOut())
    EventHandler.on(this._element, EVENT_DROP, () => this._dropOut())

    EventHandler.on(this._element, EVENT_DROP, () => this._drop())
  }
  _preventEvent(evt) {
    evt.preventDefault()
    evt.stopPropagation()
  }

  _dropIn() {
    if (!this._isSuccess()) {
      this._element.classList.add(CLASS_NAME_DRAGOVER)
    }
  }
  _dropOut() {
    if (!this._isSuccess()) {
      this._element.classList.remove(CLASS_NAME_DRAGOVER)
    }
  }
  _drop() {
    if (!this._isSuccess()) {
      this.start()
    }
  }

  _isSuccess() {
    return this._element.classList.contains(CLASS_NAME_SUCCESS)
  }
}

/**
 * ------------------------------------------------------------------------
 * Data Api implementation
 * ------------------------------------------------------------------------
 */

/*SelectorEngine.find(SELECTOR_FORM).forEach((form) => {
  UploadDragDrop.getOrCreateInstance(form)
})*/

const createInput = (element) => {
  let found = element.matches && element.matches(SELECTOR_FORM) ? element : element.closest ? element.closest(SELECTOR_FORM) : null
  if (found) {
    UploadDragDrop.getOrCreateInstance(found)
  }
  return null
}

if (typeof window !== 'undefined' && typeof document !== 'undefined') {
  document.addEventListener('dragenter', function (evt) {
    createInput(evt.target)
  })
  EventHandler.on(document, EVENT_CLICK_DATA_API, SELECTOR_FORM + ' label', function () {
    createInput(this)
  })
}

export default UploadDragDrop