gtfs2gps function changing input parameter by reference

[Joaobazzo]

gtfs2gps::gtfs2gps() is changing the arrival_time and departure_time by
reference, which then changes the input file

See reprex below

gtfs_file <- system.file("extdata/poa.zip", package = "gtfs2gps")
gtfs <- gtfstools::read_gtfs(gtfs_file) 
gtfs_small <- gtfstools::filter_by_trip_id(gtfs, trip_id ="T2-1@1#520")

Check class() before

str(gtfs_small$stop_times[,c("arrival_time","departure_time")])
#> Classes 'data.table' and 'data.frame':   62 obs. of  2 variables:
#>  $ arrival_time  : chr  "05:20:00" "" "" "" ...
#>  $ departure_time: chr  "05:20:00" "" "" "" ...
#>  - attr(*, ".internal.selfref")=<externalptr>

Apply function

a <- gtfs2gps::gtfs2gps(gtfs_small)
#> Converting shapes to sf objects
#> Using 3 CPU cores
#> Processing the data
#> 9 'speed' values are NA for shape_id 'T2-1'.
#> Some 'speed' values are NA in the returned data.

Check class() after

str(gtfs_small$stop_times[,c("arrival_time","departure_time")])
#> Classes 'data.table' and 'data.frame':   62 obs. of  2 variables:
#>  $ arrival_time  : int  19200 NA NA NA NA NA NA NA NA NA ...
#>  $ departure_time: int  19200 NA NA NA NA NA NA NA NA NA ...
#>  - attr(*, ".internal.selfref")=<externalptr>

Notice that the function does note work anymore
when the gtfs_small is applied again

a <- gtfs2gps::gtfs2gps(gtfs_small)
#> Error in string_to_seconds(departure_time): Assertion on 'string' failed: Must be of type 'character', not 'integer'.

^{Created on 2022-07-01 by the reprex package (v2.0.1)}

[rafapereirabr]

Fixed with a37b34d