activestorage/app/javascript/activestorage/direct_uploads_controller.js
import { DirectUploadController } from "./direct_upload_controller"
import { findElements, dispatchEvent, toArray } from "./helpers"
const inputSelector = "input[type=file][data-direct-upload-url]:not([disabled])"
export class DirectUploadsController {
constructor(form) {
this.form = form
this.inputs = findElements(form, inputSelector).filter(input => input.files.length)
}
start(callback) {
const controllers = this.createDirectUploadControllers()
const startNextController = () => {
const controller = controllers.shift()
if (controller) {
controller.start(error => {
if (error) {
callback(error)
this.dispatch("end")
} else {
startNextController()
}
})
} else {
callback()
this.dispatch("end")
}
}
this.dispatch("start")
startNextController()
}
createDirectUploadControllers() {
const controllers = []
this.inputs.forEach(input => {
toArray(input.files).forEach(file => {
const controller = new DirectUploadController(input, file)
controllers.push(controller)
})
})
return controllers
}
dispatch(name, detail = {}) {
return dispatchEvent(this.form, `direct-uploads:${name}`, { detail })
}
}