jsonlogic

Values

apply

pub fn apply(
  rule: String,
  to data: dynamic.Dynamic,
) -> Result(dynamic.Dynamic, error.EvaluationError)

Apply a JSONLogic rule to dynamic data.

This function parses the string rule via json.parse and then evaluates it using jsonlogic.apply_dynamic.

Examples

jsonlogic.apply(
  "{ \"var\" : \"a\" }",
  dynamic.properties([
    #(dynamic.string("a"), dynamic.int(1)),
    #(dynamic.string("b"), dynamic.int(2)),
  ]),
)
// -> 1

apply_dynamic

</>

pub fn apply_dynamic(
  rule: dynamic.Dynamic,
  to data: dynamic.Dynamic,
) -> Result(dynamic.Dynamic, error.EvaluationError)

Apply a dynamic JSONLogic rule to dynamic data.

This function should be used when the rule is already parsed via json.parse or other means.

Examples

let rules =
  "
  { \"and\" : [
    {\"<\" : [ { \"var\" : \"temp\" }, 110 ]},
    {\"==\" : [ { \"var\" : \"pie.filling\" }, \"apple\" ] }
  ] }
  "

let data =
  dynamic.properties([
    #(dynamic.string("temp"), dynamic.int(100)),
    #(
      dynamic.string("pie"),
      dynamic.properties([
        #(dynamic.string("filling"), dynamic.string("apple")),
      ]),
    ),
  ])

use parsed_rules <- result.map(json.parse(rules, decode.dynamic))
jsonlogic.apply_dynamic(parsed_rules, data)
// -> Ok(True)