564 add meta editing to the editor

[vin-ni]

Most of the frontendimplementation is done.

Missing steps:

• Update Graphql to offer Streamassignment options
• Update Graphql on backend side to offer AboutText, etc
• Add StreamingAssignment in Graphql request
• Subscription for Meta Mutation
• Validation? (maybe skipable for now, since we don't change the slug)
• Submit to DB

Could you help me with that @capital-G ?

The idea:
On Meta tab we load all the meta data of the graph. Once we made updates, we can submit those in a summarized mutation. There is no subscription to keep it simple.

Question:
I needed to add the AboutText, Displayname, ... to the GraphDocument Request. Do you think it's ok to extend it, or should we keep it clean and add a second request just for the Metadata?

I'm wondering, because in theory one could add a lot of images to one of these texts, which would in bloat the size of the GraphDocument request a lot. This could possibly lead to a bottleneck increasing the time of loading the editor. Since the data is only necessary if Metadata needs to be exchanged.

On the other hand, uploading incredibly big images to the AboutText would also put that load to the users. So maybe it's then just fair? :P

[github-actions]

File	Coverage
All files	82%	✅
gencaster/db_logging.py	96%	✅
gencaster/distributor.py	68%	✅
gencaster/schema.py	58%	✅
gencaster/urls.py	76%	✅
osc_server/models.py	91%	✅
osc_server/server.py	55%	✅
story_graph/engine.py	91%	✅
story_graph/markdown_parser.py	91%	✅
story_graph/models.py	96%	✅
story_graph/types.py	93%	✅
stream/frontend_types.py	94%	✅
stream/models.py	92%	✅
stream/types.py	99%	✅

Minimum allowed coverage is 50%

Generated by 🐒 cobertura-action against 1485003

[capital-G]

If you think this is good as it is right now we can merge it :)

[vin-ni]

If you think this is good as it is right now we can merge it :)

I added two more things:

• Black loading spinner
• Deactivated buttons if there are no changes