kantime-rule-engine/ruleEngineFunctions.js

A library for custom validation in the form based on the user defined json schema.

let _ = require("lodash");

let functions = {
    /*
        Invert the bool value  
        Input: bool
        output: bool
    */
    INVERT: {
        apply: function (input) {
            try {
                input = input == 'true' ? true : input;
                input = input == 'false' ? false : input;

                if(!_.isBoolean(input)){
                    throw "Incorrect Boolean Value - '" + input + "'";
                }

                return !input;
            } catch (error) {
                throw "INVERTFunctionException: " + error;
            }
        }
    },

    /*
        calculate Age
        Input: date
        output: int
    */
    AGE: {
        apply: function (dateString) {
            try {
                // date is valid or not
                // if(!_.isDate(dateString)){
                //     throw "Incorrect Date String - '" + dateString + "'";
                // }

                var today = new Date();
                var birthDate = new Date(dateString);
                var age = today.getFullYear() - birthDate.getFullYear();
                var m = today.getMonth() - birthDate.getMonth();
                if (m < 0 || (m === 0 && today.getDate() < birthDate.getDate())) {
                    age--;
                }
                return age;
            } catch (error) {
                throw "AGEFunctionException: " + error;
            }
        }
    },

    /*
        Find length of string
        Input: string
        output: int
    */
    LENGTH: {
        apply: function (input) {
            try {
                return input.length;
            } catch (error) {
                throw "LENGTHFunctionException: " + error;
            }
        }
    }
}

module.exports = functions;