Support Only Office template files

[AlexAndBear]

Description

Subset of owncloud/ocis#9785

Context
owncloud/ocis#10276

User Stories

As a user I want to create editable office files via templates

Value

Creating multiple files with the same template

Acceptance Criteria

• Web Client reads the target_ext field from the app/list response.
• Files with that flag will trigger a new default action, which is "Create file from template"
  • New extension within the external app
  • Needs to be registered for the default (left click) and context (right click) extension points
  • Left click should take priority over viewing/editing the template file
  • if the authenticated user has no personal space, the action is not available
  • flow when action is triggered:
    • Show input modal for new file name (use the target_ext field for the file extension)
    • File is to be placed in the root of the personal space, file name collisions need to be handled client side (propfind to personal space needed)
    • Create new file by calling the app/new endpoint (same as if the + New menu had been used)
    • Open the newly created file (app/open endpoint), but add the fileId of the template as template_id to the app/open request
    • Use the loadingService to visualize that there are things happening in the background (until the new document gets opened)
• The existing file action "Open this File in ..." will stay and can be used via right click.

Definition of ready

• Everybody needs to understand the value written in the user story
• Acceptance criteria have to be defined
• All dependencies of the user story need to be identified
• Feature should be seen from an end user perspective
• Story has to be estimated
• Story points need to be less than 20

Definition of done

• Functional requirements
  • Functionality described in the user story works
  • Acceptance criteria are fulfilled
• Quality
  • Code review happened
  • CI is green (that includes new and existing automated tests)
  • Critical code received unit tests by the developer
  • e2e test for the happy path of this feature, with a dotx to docx conversion
• Non-functional requirements
  • No sonar cloud issues

[tbsbdr]

template testing files (word, excel, powerpoint) for a start:
Archive.zip

[micbar]

Backend has been merged.