Review helper functions

[peterdesmet]

Suggested in camtraptor July 2023 coding sprint

zzz.R contains the following helper functions. It should be reviewed if they are still necessary and/or need to be renamed.

• [x] zzz.R: rename to utils.R
• [x] ~check_package(): move to own check_package.R file, see #247~ UPDATE: function replaced by camtrapdp::check_camtrapdp().
• [ ] check_value(): needed?
• [x] collapse_transformer(): can't this be done with native glue, is a separate transformer needed?
• [ ] labelFormat_scale(): needed? Bundle plot/map related functions in in utils-plot.R?
• [ ] get_dep_no_obs(): needed? Could this be done as part of filter_observations()?
• [ ] calc_daily_effort(): needed? rename to daily_effort()?
• [ ] predict_r(): needed? rename to predict_radial_distance()?
• [ ] map_legend_title(): needed? rename? Bundle plot/map related functions in in utils-plot.R?
• [ ] get_legend_title(): needed? rename? Bundle plot/map related functions in in utils-plot.R?
• [ ] add_unit_to_legend_title(): needed? Bundle plot/map related functions in in utils-plot.R?
• [ ] mutate_when_missing(): needed?

[PietrH]

collapse_transformer() is actually copied from the glue documentation: https://glue.tidyverse.org/articles/transformers.html

[damianooldoni]

Great news. Thanks to notice it! Stijn used it long time ago for etn package. Since then, I am reusing in other packages if needed. At that time still a piece of code on StackOverflow I think. Happy to see it in glue package. Once working on this issue we can check if we can make use of the glue function.