[F2V] Upload manager

[skjnldsv]

This ticket is part of the files to vue migration

Goal

Have a dedicated upload managemnt module that can be invoked in multiple areas

QA

• Independent source code
• Can be invoked without Files (standalone)
• Can be invoked externally (e.g dropping from the Files app to a folder)
• Can be invoked with external auth (e.g used for public upload)
• Support direct upload
• Support chunk upload

First step

• API: OCA.Files.Uploader
• Dedicated service running in the background
  • Can add files/folder
  • Can retrieve the current summary of background service
  • Summary shall contain the following: Files/Folder count, size, remaining time.
• Files UI shall contain the progress bar with a cancel button following this design:
  
  First line files/folder count, second line: total size + remaining time
  Location of this UI remains unchanged: after the breadcrumbs
  • How shall we handle that ?
    • Does OCA.Files.Uploader provides a way to inject the component in the page directly?
    • Does it stays a service-api only and Files implements the display of the raw summary data?
    • Do we provide both to allow other apps to interact with the service on the page?

Second step (not 24)

• Have a dedicated UI showing each files/folders opening when clicking the summary (like onedrive)
• Only show folder if uploading multiple files, show file if uploading individually
• Being able to cancel each file or folder being uploaded

Optional TBD

• ❓ Pause/resume uploads (Resume chunked uploads #673)
• ❓ Support bulk upload
• ❓ Provides upload methods so it can be invoked without UI

Design

@nimishavijay @jancborchardt