# Matey A browser-based editor meant for writing YARRRML rules. The corresponding RML rules can be exported for use outside of Matey. Additionally, the rules can be executed on a sample of the data, which allows users to inspect the generated Linked Data. ## Table of contents 1. [Requirements](#requirements) 2. [Installation](#installation) 3. [Usage](#usage) 4. [Examples](#examples) 5. [Run tests](#run-tests) 6. [License](#license) ## Requirements [Node.js](https://nodejs.org/en/download/) ## Installation ```shell npm i @rmlio/matey ``` ## Usage ### Setting up the RMLMapper Web API endpoint To generate Linked Data triples, Matey does its RML mapping through a remote server. For this, Matey requires you to provide an RMLMapper endpoint. You can either provide the URL of an existing server, or set one up yourself by following [these instructions](https://github.com/RMLio/rmlmapper-webapi-js). Make sure that you provide the correct URL for the endpoint during [configuration](#configuring-matey). ### Preparing your page Put a div element with a certain id where you want your Matey editor to be: ```html

``` Try to avoid declaring div elements with id's suffixed with `-matey`, as most div elements that will be inserted into your page have such an id. For example, elements with id's such as `btn-matey` or `editor-matey` are reserved by Matey. ### Setting up Matey by including minified script in page - Install dependencies by running `npm install`. - Create minified version by running `npm run build:browser`, which puts the scripts in the current working directory. You can also choose your own file destination by running `browserify lib/index.js --standalone Matey -t urify/transform -t brfs -t browserify-css | terser > my/file/destination.min.js`. - Start an RMLMapper Web API endpoint (sugggested: [rmlmapper-webapi-js](https://github.com/RMLio/rmlmapper-webapi-js)) - Include the script in your HTML code, and call Matey's `init` function on an instance of the `Matey` class: ```html ``` ### Setting up Matey using a bundler In your JavaScript code, import the Matey class from the package, and on an instance call the `init` function with the `id` of the `div` element for the editor. ```javascript const Matey = require("matey"); const matey = new Matey(); const config = { rmlMapperUrl: "https://rml.io/api/rmlmapper/execute" // make sure an RMLMapper endpoint with this URL is active! }; matey.init("matey-id", config); ``` You can use `browserify` from within the project's root directory to bundle up the code and its dependencies, so you can include it in your HTML code. The example in the folder `examples/with_bundler` used the following command to bundle the code up into `examples/with_with_bundler/bundle.js`: ```shell browserify examples/with_bundler/init.js -t urify/transform -t brfs -t browserify-css --minify=true | terser > examples/with_bundler/bundle.js ``` The browserify transformations used in the example are necessary for Matey to work. ### Configuring Matey To configure Matey, you can pass a JSON object as an argument to Matey's `init` method. The configuration options are: - `rmlMapperUrl`: URL of RMLMapper Web API endpoint An example of calling `init` with a configuration object would be: ```javascript let config = { rmlMapperUrl: "http://tw06v069.ugent.be/rmlmapper/process" }; matey.init("matey-id", config); ``` ### YARRRML examples The YARRRML examples come from a single configuration file located at `lib/resources/examples.json`. If you want to add a new example to the editor, that's where you want to add stuff. ## Examples Examples of usage can be found in the `examples` directory of the project. Both examples illustrate the use of Matey through a single web page which only contains Matey's editors. In these examples, Matey is configured to use an RMLMapper endpoint with URL `http://localhost:4000/execute`, so if you want these examples to run, make sure you have such an endpoint set up. ## Developing 1. Install dependencies via ```shell npm i ``` 2. Build via ```shell npm run build:browser ``` 3. Copy `matey.min.js` from `dist` to `examples/with_minified_script/matey.min.js` via ```shell cp dist/matey.min.js examples/with_minified_script/matey.min.js ``` 4. Run an HTTP server inside `examples/with_minified_script` via ```shell npx http-server examples/with_minified_script ``` 5. Open in the browser. ## Run tests The tests also assume that an RMLMapper endpoint with URL is up and running. Once you have it set up, run the following commands from inside the project directory: ```shell npm install npm test ``` ## License This code is copyrighted by [Ghent University – imec](http://knows.idlab.ugent.be/) and released under the [MIT license](http://opensource.org/licenses/MIT).