{admiral} date-time cyclomatic complexity cleanup

[zdz2101]

We are seeking to reduce the cyclomatic complexity of the date/datetime functions in our codebase, e.g.derive_vars_dtm()

@pharmaverse/admiral please comment here if you'd like to be involved.

[bms63]

I'm in for this one. Should be really interesting!!!

[millerg23]

count me in.

[zdz2101]

Looks like we can revive the old-lab working group! I'll slack yall about meeting times for a kick off, I've created an issue to start "demo"-ing some of the tasks that can be done to start tackling this daunting task

[zdz2101]

Mural to sketch of mindmap of how to break it down:

https://app.mural.co/t/admiraldevelopmentteam6136/m/admiraldevelopmentteam6136/1708018668425/50fce14599531b503b2f568061c1f274482c47f8?sender=u2186aa07ff6a351a07a19987

[bms63]

Looks awesome! Maybe we can convert some of the test files to help us walk through each step of the process?

One thing is we should really up our unit test game before we dive too deep into re-working the functions

[StefanThoma]

Hey all, I'd be interested to join this effort as well.

[zdz2101]

Created issues pertaining to smaller bite sized chunks

• Clean up easy if() and else if() code chunks in datetime/date codebase #2342
• Separate derive_date_vars() into its two inherently separate compoents: datetime vs date and their respective parent-child subfunctions #2339
• Separate test-derive_date_vars.R into its inherent separate parts  #2340
• Clean up documentation on datetime/date flagging functions, e.g. compute_dtf()/compute_tmf() to make development/maintenance easier #2343
• Add unit tests to each function and add edge cases to ensure our functions are doing what we expect (to be parsed into maybe 7-8 issues)
• Potentially collapse some of the embedded functions/wrappers so that derive_ function does not go 4-layers deep, wonder if impute_dtc_xxx() and restricted_imputed_dtc_xxx() can be more "intuitive" (tentative)

[zdz2101]

Continue talk about the preserve argument and the exotic ways to use these functions