src/blocks/scratch3_core_example.js

const BlockType = require('../extension-support/block-type');
const ArgumentType = require('../extension-support/argument-type');

/* eslint-disable-next-line max-len */
const blockIconURI = 'data:image/svg+xml,%3Csvg id="rotate-counter-clockwise" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"%3E%3Cdefs%3E%3Cstyle%3E.cls-1%7Bfill:%233d79cc;%7D.cls-2%7Bfill:%23fff;%7D%3C/style%3E%3C/defs%3E%3Ctitle%3Erotate-counter-clockwise%3C/title%3E%3Cpath class="cls-1" d="M22.68,12.2a1.6,1.6,0,0,1-1.27.63H13.72a1.59,1.59,0,0,1-1.16-2.58l1.12-1.41a4.82,4.82,0,0,0-3.14-.77,4.31,4.31,0,0,0-2,.8,4.25,4.25,0,0,0-1.34,1.73,5.06,5.06,0,0,0,.54,4.62A5.58,5.58,0,0,0,12,17.74h0a2.26,2.26,0,0,1-.16,4.52A10.25,10.25,0,0,1,3.74,18,10.14,10.14,0,0,1,2.25,8.78,9.7,9.7,0,0,1,5.08,4.64,9.92,9.92,0,0,1,9.66,2.5a10.66,10.66,0,0,1,7.72,1.68l1.08-1.35a1.57,1.57,0,0,1,1.24-.6,1.6,1.6,0,0,1,1.54,1.21l1.7,7.37A1.57,1.57,0,0,1,22.68,12.2Z"/%3E%3Cpath class="cls-2" d="M21.38,11.83H13.77a.59.59,0,0,1-.43-1l1.75-2.19a5.9,5.9,0,0,0-4.7-1.58,5.07,5.07,0,0,0-4.11,3.17A6,6,0,0,0,7,15.77a6.51,6.51,0,0,0,5,2.92,1.31,1.31,0,0,1-.08,2.62,9.3,9.3,0,0,1-7.35-3.82A9.16,9.16,0,0,1,3.17,9.12,8.51,8.51,0,0,1,5.71,5.4,8.76,8.76,0,0,1,9.82,3.48a9.71,9.71,0,0,1,7.75,2.07l1.67-2.1a.59.59,0,0,1,1,.21L22,11.08A.59.59,0,0,1,21.38,11.83Z"/%3E%3C/svg%3E';

/**
 * An example core block implemented using the extension spec.
 * This is not loaded as part of the core blocks in the VM but it is provided
 * and used as part of tests.
 */
class Scratch3CoreExample {
    constructor (runtime) {
        /**
         * The runtime instantiating this block package.
         * @type {Runtime}
         */
        this.runtime = runtime;
    }

    /**
     * @returns {object} metadata for this extension and its blocks.
     */
    getInfo () {
        return {
            id: 'coreExample',
            name: 'CoreEx', // This string does not need to be translated as this extension is only used as an example.
            blocks: [
                {
                    opcode: 'exampleOpcode',
                    blockType: BlockType.REPORTER,
                    text: 'example block'
                },
                {
                    opcode: 'exampleWithInlineImage',
                    blockType: BlockType.COMMAND,
                    text: 'block with image [CLOCKWISE] inline',
                    arguments: {
                        CLOCKWISE: {
                            type: ArgumentType.IMAGE,
                            dataURI: blockIconURI
                        }
                    }
                },
                {
                    opcode: 'exampleNodeInputs',
                    blockType: BlockType.COMMAND,
                    text: 'block with some node inputs [CLOCKWISE]',
                    arguments: {
                        CLOCKWISE: {
                            type: ArgumentType.POLYGON,
                            nodes: 3
                        }
                    }
                }
            ]
        };
    }

    /**
     * Example opcode just returns the name of the stage target.
     * @returns {string} The name of the first target in the project.
     */
    exampleOpcode () {
        const stage = this.runtime.getTargetForStage();
        return stage ? stage.getName() : 'no stage yet';
    }

    exampleWithInlineImage () {
        return;
    }

    exampleNodeInputs (args, util) {
        const nodes = args.CLOCKWISE;
        this.runtime.ext_pen._penUp(util.target);
        this.runtime.ext_pen.clear();
        util.target.setXY(nodes[0].x, nodes[0].y);
        this.runtime.ext_pen._penDown(util.target);
        nodes.forEach(node => {
            util.target.setXY(node.x, node.y);
        });
        util.target.setXY(nodes[0].x, nodes[0].y);
    }
}

module.exports = Scratch3CoreExample;