[Feature] Support from_time for the /tracking/<user_ids> endpoint

[vicb]

This feature request is similar to how /tracking/<user_id>/json supports a last_update parameter to only fetch the latest points... but a bit different.

The idea is to be able to request the updates for a group of pilots from a given time so last_update should be a timestamp (number of seconds since January 1, 1970 12:00:00 AM).

The way last_update is implemented in /tracking/<user_id>/json would not work.
That's because in this case last_update is the number of seconds since prior midnight UTC of the first track point.

Let's say pilotA starts flying at 23:30 UTC and pilotB starts flying at 00:30 UTC then their reference day would be different and there is no one last_update value that is common to both. Making last_update a timestamp for the /tracking/<user_ids> endpoint would solve this.

Context: I am revamping the SkyLines tracker support into flyxc.app.

Thanks !

[vicb]

Hey @Turbo87 do you think this is a good idea ?

Would you merge this if I create a PR ?

The query parameter could be called from_time and take a UNIX timestamp.
It could be added to the endpoints:

• /tracking/latest.json
• /live/<user_ids>
• /live/<user_id>/json in complement of the already existing last_update.

The advantage would be that I don't have to pull 12h of track every time I retrieve positions from Skylines. It would save bandwidth and CPU.

What do you think ?

[Turbo87]

seems like a reasonable request. I'm a little worried about breaking the existing code though, so it would be great if you could ensure that we have decent test coverage for these endpoints before modifying them. 🙏

[vicb]

Thanks @Turbo87 I'll give it a try.

I am having troubles installing the Vagrant env.

On the first vagrant up I get the error default: Failed to fetch http://ppa.launchpad.net/jonathonf/python-2.7/ubuntu/dists/trusty/main/binary-amd64/Packages 403 Forbidden [IP: 91.189.95.83 80]. A second vagrant up goes through but I suspect I have missing dependencies.

Do you have updated instructions on how to setup the development environment and run the tests ?

Thanks,
Vic

[Turbo87]

I haven't run if for a while. It's possible that some dependency update broke it... 😞

welcome to the rabbit hole 🎉

[vicb]

I can try to investigate this.

How do you debug the server ?

What are the steps to install the python deps an run the tests ?

I guess
pipenv install --dev and then ?

[Turbo87]

How do you debug the server ?

depends on what exactly you mean by that

What are the steps to install the python deps an run the tests ?

skylines/.github/workflows/ci.yml

Lines 114 to 119 in 2a6c948

	# Install Python dependencies
	- run: pip install pipenv==v2020.4.1b2
	- run: pipenv install --dev
	# Run the test suite
	- run: pipenv run py.test -vv --color=yes --cov=skylines --cov-report term-missing:skip-covered

should give a few hints.

[vicb]

I have hacked a working config using https://github.com/nektos/act

Using the comand:

$ act -P ubuntu-latest=nektos/act-environments-ubuntu:18.04 -j backend

I should be able to make some progress with that.

Thanks for your help.