src/js/molecules/extracttag.js

import Atom from '../prototypes/atom.js'
import GlobalVariables from '../globalvariables.js'

/**
 * The cut away tag adds a tag to a part indicating that it should be cut away from the rest of the model in the next assembly. Essentially it creates a negitive version of itself.
 */
export default class ExtractTag extends Atom{
    /**
     * The constructor function.
     * @param {object} values An array of values passed in which will be assigned to the class as this.x
     */ 
    constructor(values){
        super(values)
        
        /**
         * This atom's type
         * @type {string}
         */
        this.atomType = 'Extract Tag'
        /**
         * This atom's type
         * @type {string}
         */
        this.type = 'extractTag'
        /**
         * This atom's height as drawn on the screen
         */
        this.height
        /**
         * This atom's name
         * @type {string}
         */
        this.name = 'Extract Tag'
        /** 
         * A description of this atom
         * @type {string}
         */
        this.description = "Extracts geometry containing the specified tag."
        
        this.addIO('input', 'geometry', this, 'geometry', null, false, true)
        this.addIO('input', 'tag', this, 'string', 'Tag String')
        this.addIO('output', 'geometry', this, 'geometry', null)
        
        this.setValues(values)
    }
    
    /**
     * Draw the constant which is more rectangular than the regular shape.
     */ 
    draw() {
        
        super.draw("rect")
        let pixelsX = GlobalVariables.widthToPixels(this.x)
        let pixelsY = GlobalVariables.heightToPixels(this.y)
        let pixelsRadius = GlobalVariables.widthToPixels(this.radius)
        /**
        * Relates height to radius
        * @type {number}
        */
        this.height= pixelsRadius

        GlobalVariables.c.beginPath()
        GlobalVariables.c.fillStyle = '#484848'
        GlobalVariables.c.font = `${pixelsRadius}px Work Sans Bold`
        GlobalVariables.c.fillText(String.fromCharCode(0x2191,0x0023,0x2191), pixelsX- pixelsRadius/1.2, pixelsY+this.height/3)
        GlobalVariables.c.fill()
        GlobalVariables.c.closePath()
    }
    /**
     * Adds the cutAway tag to the part
     */ 
    updateValue(){
        if(this.inputs.every(x => x.ready)){
            try{
                var inputPath = this.findIOValue('geometry')
                const tag =  this.findIOValue('tag')
                const values = {op: "extractTag", tag: tag, readPath: inputPath, writePath: this.path }
                this.basicThreadValueProcessing(values)
                this.clearAlert()
            }catch(err){this.setAlert(err)}
        }
    }
    
}