uppy/src/plugins/StatusBar/index.js

const Plugin = require('../../core/Plugin')
const Translator = require('../../core/Translator')
const StatusBarUI = require('./StatusBar')
const statusBarStates = require('./StatusBarStates')
const { getSpeed } = require('../../core/Utils')
const { getBytesRemaining } = require('../../core/Utils')
const { prettyETA } = require('../../core/Utils')
const prettyBytes = require('prettier-bytes')

/**
 * StatusBar: renders a status bar with upload/pause/resume/cancel/retry buttons,
 * progress percentage and time remaining.
 */
module.exports = class StatusBar extends Plugin {
  constructor (uppy, opts) {
    super(uppy, opts)
    this.id = this.opts.id || 'StatusBar'
    this.title = 'StatusBar'
    this.type = 'progressindicator'

    const defaultLocale = {
      strings: {
        uploading: 'Uploading',
        complete: 'Complete',
        uploadFailed: 'Upload failed',
        pleasePressRetry: 'Please press Retry to upload again',
        paused: 'Paused',
        error: 'Error',
        retry: 'Retry',
        cancel: 'Cancel',
        pressToRetry: 'Press to retry',
        retryUpload: 'Retry upload',
        resumeUpload: 'Resume upload',
        cancelUpload: 'Cancel upload',
        pauseUpload: 'Pause upload',
        filesUploadedOfTotal: {
          0: '%{complete} of %{smart_count} file uploaded',
          1: '%{complete} of %{smart_count} files uploaded'
        },
        dataUploadedOfTotal: '%{complete} of %{total}',
        xTimeLeft: '%{time} left',
        uploadXFiles: {
          0: 'Upload %{smart_count} file',
          1: 'Upload %{smart_count} files'
        },
        uploadXNewFiles: {
          0: 'Upload +%{smart_count} file',
          1: 'Upload +%{smart_count} files'
        }
      }
    }

    // set default options
    const defaultOptions = {
      target: 'body',
      hideUploadButton: false,
      showProgressDetails: false,
      locale: defaultLocale,
      hideAfterFinish: true
    }

    // merge default options with the ones set by user
    this.opts = Object.assign({}, defaultOptions, opts)

    this.locale = Object.assign({}, defaultLocale, this.opts.locale)
    this.locale.strings = Object.assign({}, defaultLocale.strings, this.opts.locale.strings)

    this.translator = new Translator({locale: this.locale})
    this.i18n = this.translator.translate.bind(this.translator)

    this.startUpload = this.startUpload.bind(this)
    this.render = this.render.bind(this)
    this.install = this.install.bind(this)
  }

  getTotalSpeed (files) {
    let totalSpeed = 0
    files.forEach((file) => {
      totalSpeed = totalSpeed + getSpeed(file.progress)
    })
    return totalSpeed
  }

  getTotalETA (files) {
    const totalSpeed = this.getTotalSpeed(files)
    if (totalSpeed === 0) {
      return 0
    }

    const totalBytesRemaining = files.reduce((total, file) => {
      return total + getBytesRemaining(file.progress)
    }, 0)

    return Math.round(totalBytesRemaining / totalSpeed * 10) / 10
  }

  startUpload () {
    return this.uppy.upload().catch((err) => {
      this.uppy.log(err.stack || err.message || err)
      // Ignore
    })
  }

  getUploadingState (isAllErrored, isAllComplete, files) {
    if (isAllErrored) {
      return statusBarStates.STATE_ERROR
    }

    if (isAllComplete) {
      return statusBarStates.STATE_COMPLETE
    }

    let state = statusBarStates.STATE_WAITING
    const fileIDs = Object.keys(files)
    for (let i = 0; i < fileIDs.length; i++) {
      const progress = files[fileIDs[i]].progress
      // If ANY files are being uploaded right now, show the uploading state.
      if (progress.uploadStarted && !progress.uploadComplete) {
        return statusBarStates.STATE_UPLOADING
      }
      // If files are being preprocessed AND postprocessed at this time, we show the
      // preprocess state. If any files are being uploaded we show uploading.
      if (progress.preprocess && state !== statusBarStates.STATE_UPLOADING) {
        state = statusBarStates.STATE_PREPROCESSING
      }
      // If NO files are being preprocessed or uploaded right now, but some files are
      // being postprocessed, show the postprocess state.
      if (progress.postprocess && state !== statusBarStates.STATE_UPLOADING && state !== statusBarStates.STATE_PREPROCESSING) {
        state = statusBarStates.STATE_POSTPROCESSING
      }
    }
    return state
  }

  render (state) {
    const files = state.files

    const uploadStartedFiles = Object.keys(files).filter((file) => {
      return files[file].progress.uploadStarted
    })
    const newFiles = Object.keys(files).filter((file) => {
      return !files[file].progress.uploadStarted &&
        !files[file].progress.preprocess &&
        !files[file].progress.postprocess
    })
    const completeFiles = Object.keys(files).filter((file) => {
      return files[file].progress.uploadComplete
    })
    const erroredFiles = Object.keys(files).filter((file) => {
      return files[file].error
    })
    const inProgressFiles = Object.keys(files).filter((file) => {
      return !files[file].progress.uploadComplete &&
             files[file].progress.uploadStarted &&
             !files[file].isPaused
    })
    const processingFiles = Object.keys(files).filter((file) => {
      return files[file].progress.preprocess || files[file].progress.postprocess
    })

    let inProgressFilesArray = inProgressFiles.map((file) => {
      return files[file]
    })

    const totalSpeed = prettyBytes(this.getTotalSpeed(inProgressFilesArray))
    const totalETA = prettyETA(this.getTotalETA(inProgressFilesArray))

    // total size and uploaded size
    let totalSize = 0
    let totalUploadedSize = 0
    inProgressFilesArray.forEach((file) => {
      totalSize = totalSize + (file.progress.bytesTotal || 0)
      totalUploadedSize = totalUploadedSize + (file.progress.bytesUploaded || 0)
    })
    totalSize = prettyBytes(totalSize)
    totalUploadedSize = prettyBytes(totalUploadedSize)

    const isUploadStarted = uploadStartedFiles.length > 0

    const isAllComplete = state.totalProgress === 100 &&
      completeFiles.length === Object.keys(files).length &&
      processingFiles.length === 0

    const isAllErrored = isUploadStarted &&
      erroredFiles.length === uploadStartedFiles.length

    const isAllPaused = inProgressFiles.length === 0 &&
      !isAllComplete &&
      !isAllErrored &&
      uploadStartedFiles.length > 0

    const resumableUploads = state.capabilities.resumableUploads || false

    return StatusBarUI({
      error: state.error,
      uploadState: this.getUploadingState(isAllErrored, isAllComplete, state.files || {}),
      totalProgress: state.totalProgress,
      totalSize: totalSize,
      totalUploadedSize: totalUploadedSize,
      uploadStarted: uploadStartedFiles.length,
      isAllComplete: isAllComplete,
      isAllPaused: isAllPaused,
      isAllErrored: isAllErrored,
      isUploadStarted: isUploadStarted,
      complete: completeFiles.length,
      newFiles: newFiles.length,
      inProgress: inProgressFiles.length,
      totalSpeed: totalSpeed,
      totalETA: totalETA,
      files: state.files,
      i18n: this.i18n,
      pauseAll: this.uppy.pauseAll,
      resumeAll: this.uppy.resumeAll,
      retryAll: this.uppy.retryAll,
      cancelAll: this.uppy.cancelAll,
      startUpload: this.startUpload,
      resumableUploads: resumableUploads,
      showProgressDetails: this.opts.showProgressDetails,
      hideUploadButton: this.opts.hideUploadButton,
      hideAfterFinish: this.opts.hideAfterFinish
    })
  }

  install () {
    const target = this.opts.target
    if (target) {
      this.mount(target, this)
    }
  }

  uninstall () {
    this.unmount()
  }
}