Trool | A rule engine for NodeJS written in TypeScript | Runtime Evironment library

install $ npm install --save trool. Open Excel, LibreOffice Calc, or some other spreadsheet tool of your choice. A Fact is an instance-object or array of instance-objects, which you want to update based on conditions that may change over time. Create at least one decision-table on the spreadsheet so you can update a fact. You must follow the format closely for setting up a decision-table. Trool may throw errors if you do not set things up correctly. The guide contains all the details for setting up a decision-table. You can look at the screen-shot above if you want a quick glimpse on what decision-tables look like. Export your spreadsheet as a CSV file. The rules for formatting the csv are the same as they are for the csvtojson library. That's what Trool uses internally to convert the csv to a JSON object. Create a new NodeJS program (preferably with TypeScript) and import the trool library at the top. To use Trool you must call two methods init() and applyRules(). The first one takes in your facts array and the path to the CSV file. init() is asynchronous so make sure to use async/await with it. applyRules() returns the update facts and must be called after init(). init() has two optional params showLogs and imports. If you want access to the decision-tables for some reason after init() is called, there is the decisionTables getter on the trool instance. The facts and the imports must be wrapped in holder objects, with the key being the name of the fact/import to use in the spreadsheet and the value being the actual fact or import. The imports param is optional because you may only want to use ones specified in the spreadsheet or have no need for any.
install $ npm install --save trool
Open Excel, LibreOffice Calc, or some other spreadsheet tool of your choice.
A Fact is an instance-object or array of instance-objects, which you want to update based on conditions that may change over time. Create at least one decision-table on the spreadsheet so you can update a fact.
You must follow the format closely for setting up a decision-table. Trool may throw errors if you do not set things up correctly. The guide contains all the details for setting up a decision-table. You can look at the screen-shot above if you want a quick glimpse on what decision-tables look like.
Export your spreadsheet as a CSV file. The rules for formatting the csv are the same as they are for the csvtojson library. That's what Trool uses internally to convert the csv to a JSON object.
Create a new NodeJS program (preferably with TypeScript) and import the trool library at the top.
To use Trool you must call two methods init() and applyRules(). The first one takes in your facts array and the path to the CSV file. init() is asynchronous so make sure to use async/await with it. applyRules() returns the update facts and must be called after init().
init() has two optional params showLogs and imports. If you want access to the decision-tables for some reason after init() is called, there is the decisionTables getter on the trool instance.
The facts and the imports must be wrapped in holder objects, with the key being the name of the fact/import to use in the spreadsheet and the value being the actual fact or import. The imports param is optional because you may only want to use ones specified in the spreadsheet or have no need for any.
The updatedFacts variable in the previous snippet will contain all the same key/value pairs and arrays in the same order as the factsHolder that was passed in.