Get or set configuration options that control ALA4R behaviour

ala_config(...)

ala_reasons()

Arguments

...

...	Options can be defined using name = value. Valid options are: reset: `ala_config("reset")` will reset the options to their default values caching string: caching can be "on" (results will be cached, and any cached results will be re-used), "refresh" (cached results will be refreshed and the new results stored in the cache), or "off" (no caching, default). cache_directory string: the directory to use for the cache. By default this is a temporary directory, which means that results will only be cached within an R session and cleared automatically when the user exits R. The user may wish to set this to a non-temporary directory for caching across sessions. The directory must exist on the file system. verbose logical: should ALA4R give verbose output to assist debugging? (default = FALSE) warn_on_empty logical: should a warning be issued if a request returns an empty result set? (default = FALSE) user_agent string: the user-agent string used with all web requests to the ALA servers. Default = "ALA4R" with version number text_encoding string: text encoding assumed when reading cached files from local disk (default = "UTF-8") download_reason_id numeric or string: the "download reason" required by some ALA services, either as a numeric ID (currently 0--11) or a string (see `ala_reasons()` for a list of valid ID codes and names). By default this is NA. Some ALA services require a valid download_reason_id code, either specified here or directly to the associated R function.

Options can be defined using name = value. Valid options are:

reset: ala_config("reset") will reset the options to their default values
caching string: caching can be "on" (results will be cached, and any cached results will be re-used), "refresh" (cached results will be refreshed and the new results stored in the cache), or "off" (no caching, default).
cache_directory string: the directory to use for the cache. By default this is a temporary directory, which means that results will only be cached within an R session and cleared automatically when the user exits R. The user may wish to set this to a non-temporary directory for caching across sessions. The directory must exist on the file system.
verbose logical: should ALA4R give verbose output to assist debugging? (default = FALSE)
warn_on_empty logical: should a warning be issued if a request returns an empty result set? (default = FALSE)
user_agent string: the user-agent string used with all web requests to the ALA servers. Default = "ALA4R" with version number
text_encoding string: text encoding assumed when reading cached files from local disk (default = "UTF-8")
download_reason_id numeric or string: the "download reason" required by some ALA services, either as a numeric ID (currently 0--11) or a string (see ala_reasons() for a list of valid ID codes and names). By default this is NA. Some ALA services require a valid download_reason_id code, either specified here or directly to the associated R function.

Value

For ala_config(), a list of all options. When ala_config(...) is called with arguments, nothing is returned but the configuration is set.

References

https://api.ala.org.au/

https://spatial.ala.org.au/layers-service/ this will eventually move to the api link

Invoking ala_config() with no arguments returns a list with the current values of the options.

ala_reasons() returns a data frame with information describing the valid options for download_reason_id

Examples

if (FALSE) {
 ala_config()
 ala_config(caching = "off")
 ala_reasons()
 ala_config(download_reason_id = 0,verbose = TRUE)
 ala_config("reset")
}