Base64-filters

npm i @288-toolkit/base64-filters

This modules provides functions that will encode and decode positive numeric filters into base64 strings. This is suitable for use in URLs, since it will use the url safe variant of base64.

The main api are the functions encodeFilters and decodeFilters. It will use 2 formats, depending on the number of filters: If all filters have one or zero value, the layout will be x 16 bits numbers, one for each filter. 0 is used to represent no value. if any filter have more than one value, the layout will be 1 8 bits number for the length, followed by each value on 2 bytes (lowest/highest).

This means that the maximum value for a filter is 65535 and the maximum number of values per filter is 255. Only positive values are supported.

You can also choose the format strategy by using either encodeSingleFilters or encodeMultiFilters, along with their respective decode functions.