✨ allowing to log back into a study when the tab was closed

[sanderegg]

What do these changes do?

The backend maintain a Redis-based registry where all user-allocated resources are kept (for now only socket IDs and project IDs).
These resources are linked to the user so-called "client session id" which is given by the frontend as the Broswer Tab ID when the websocket connection is created (Socket ID).

FRom the backend side it is not possible to distinguish between a network disconnection and a tab-closed. Therefore we do use a TTL (time-to-live) field in the Redis registry of 900 seconds. During that time, the same browser tab would be able to re-open the same study in case that it reconnects.

In the case of a closed tab, re-opening a new tab creates a new Tab ID. Therefore the backend treats that as "the user opened another tab and is trying to open a study that is already opened in another tab". Therefore it appears locked, and the user must wait 15 minutes until it gets closed, and after that the user may open it again.

Changes

• Listing the projects now will check if the user project is already opened by that very same user. If yes, it will check if a socket ID exists. If yes, then the behavior will remain the same. If not, then the project will not be defined as Locked and the user can re-open it.
• If the project is just in the process of closing (e.g. dynamic services are saving their state and closing). then it should not be allowed to re-enter the project until the process is completed.
• if a user is exporting a project, that project is locked until the export process is completed
• if a user is duplicating a project, that project is locked until the cloning is completed
• notification to any user that shares that project are in. @odeimaiz will probably vastlymprove the frontend part.

Bonus:

• make show_endpoints shows the endpoint to some of the services on demand
• codecov badge updated
• improve some test reliability by insuring redis database is properly cleaned
• importer now has a first draft of a migration system setup (see models.py)

Related issue/s

fixes #431
fixes #1952

How to test

Checklist

[codecov]

Codecov Report

Merging #2383 (260612c) into master (b452c71) will increase coverage by 0.0%.
The diff coverage is 87.6%.

@@           Coverage Diff           @@
##           master   #2383    +/-   ##
=======================================
  Coverage    74.7%   74.7%            
=======================================
  Files         516     517     +1     
  Lines       20038   20161   +123     
  Branches     1972    2000    +28     
=======================================
+ Hits        14984   15079    +95     
- Misses       4530    4547    +17     
- Partials      524     535    +11     

Flag	Coverage Δ
integrationtests	67.2% <56.7%> (-0.1%)	⬇️
unittests	68.2% <77.5%> (-0.1%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...imcore_service_webserver/exporter/export_import.py	95.2% <ø> (ø)
.../server/src/simcore_service_webserver/users_api.py	89.8% <0.0%> (-4.2%)	⬇️
...re_service_webserver/exporter/formatters/models.py	90.5% <72.7%> (-3.2%)	⬇️
...imcore_service_webserver/resource_manager/redis.py	81.8% <80.0%> (-0.5%)	⬇️
...simcore_service_webserver/projects/projects_api.py	86.3% <82.9%> (-2.7%)	⬇️
...ore_service_webserver/exporter/request_handlers.py	86.9% <91.3%> (+2.4%)	⬆️
...simcore_service_webserver/projects/project_lock.py	94.4% <94.4%> (ø)
...odels-library/src/models_library/projects_state.py	100.0% <100.0%> (ø)
...vice_webserver/exporter/formatters/formatter_v1.py	77.9% <100.0%> (ø)
...re_service_webserver/projects/projects_handlers.py	89.3% <100.0%> (-1.0%)	⬇️
... and 10 more

[GitHK]

Nice addition! A few comments and questions below.

[odeimaiz]

💪 Thanks for bringing the Study statuses!

[GitHK]

look OK, please check below suggestion before merging

[GitHK]

👍

[GitHK]

Suggested change

	# TODO: Once python 3.8 is in use this
	import sys
	if sys.version_info >= (3, 8):
	raise Exception("use below implementation in py3.8+")

this way you won't miss it

[pcrespov]

that is a good point ...
I enabled it in py3.8 branch