Support Version Management (without sharing modes)

[farisd16]

Description

This PR adds version management as described in #97, with two exceptions:

• Version management is disabled in sharing modes. (edit, give/see feedback, collaborate) A follow-up PR is planned after this one is merged.
• I proposed two approaches in Version Management Proposal #97 for the modification of the diagram datatype to support version management. I made a different modification in my implementation as it seemed to be easier to implement, more efficient and avoided breaking changes:

id: string;
title: string;
model: UMLModel;
lastUpdate: string;
versions: Diagram[]; (recursive)
description: string;
token: string;

This avoids breaking changes because no existing fields are removed and only new fields are added. A diagram with two versions can then for example look like this:

{
  "id": "722378dd-e549-4621-9405-fe7f884e0689",
  "title": "Addressed Feedback",
  "model": {...},
  "lastUpdate": "2024-11-16T13:31:29.135Z",
  "description": "Incorporated feedback from the group",
  "versions": [
    {
      "id": "722378dd-e549-4621-9405-fe7f884e0689",
      "title": "Initial Draft",
      "model": {...},
      "lastUpdate": "2024-11-16T13:31:52.849Z",
      "description": "Proposal for the system"
    },
    {
      "id": "722378dd-e549-4621-9405-fe7f884e0689",
      "title": "Addressed Feedback",
      "model": {...},
      "lastUpdate": "2024-11-16T13:32:22.695Z",
      "description": "Incorporated feedback from the group"
    }
  ],
  "token": "pUX0hHPj5UYJE3an7Xk5"
}

Steps for Testing

1. Model a diagram
2. Publish a version by opening the sidebar and pressing the '+' button in the top right
3. Make further changes and publish another version
4. Make sure that it is possible to delete, edit, preview, and restore versions. The button for restoring a version is visible after previewing the respective version.

[egenerse]

@farisd16 I found an edge case while testing
Steps:

• Preview a version
• Create a new diagram
• The side menu doesn't come back and diagram versions are gone so I cannot cancel preview

Screen.Recording.2024-11-07.at.22.32.30.mov

[FelixTJDietrich]

@farisd16 are you fixing the issue @egenerse found in this PR? Or are you planning to do it as a follow-up?

[farisd16]

@farisd16 are you fixing the issue @egenerse found in this PR? Or are you planning to do it as a follow-up?

Should be fixed now

[egenerse]

I reviewed the code and I tested in my local, looks good to me

[FelixTJDietrich]

Code looks good to me but after testing the functionality on https://test1.apollon.ase.in.tum.de/ I still found some minor issues.

If I delete a version and then move an element the version will reappear.

Some views need to be adjusted for dark mode, I think they need a dark background with light text:

Also, the current unpublished version never disappears. I think until there are no changes it should select the published version and not show current unpublished version.

The current unpublished version also does not have the dot to show that it is selected/active.

[FelixTJDietrich]

Code changes look good to me and the functionality is now as expected. Thank you for implementing that feature!