Helper to construct filter parameters for lt_fetch

This function takes R expressions like col == "value" and converts them into the format expected by the API (e.g., list(col = "eq.value")). It supports basic comparison operators (==, !=, >, <, >=, <=) and %in%. It also handles is.na(col) and !is.na(col) for null checks.

Usage

lt_filter(...)

Arguments

...

R expressions representing filter conditions (e.g., col == "value").

Value

A named list of filter conditions formatted for the API query.

Examples

# Example usage of lt_filter - Get Lake Rotoehu contours with a specific 
# lernzmp_id
filters <- lt_filter(lernzmp_id == "LID40188")