shapez.io/src/js/game/base_item.js

import { DrawParameters } from "../core/draw_parameters";
import { BasicSerializableObject } from "../savegame/serialization";

/** @enum {string} */
export const enumItemType = {
    shape: "shape",
    color: "color",
    boolean: "boolean",
};

/**
 * Class for items on belts etc. Not an entity for performance reasons
 */
export class BaseItem extends BasicSerializableObject {
    constructor() {
        super();
    }

    static getId() {
        return "base_item";
    }

    /** @returns {object} */
    static getSchema() {
        return {};
    }

    /** @returns {enumItemType} */
    getItemType() {
        abstract;
        return "";
    }

    /**
     * Returns if the item equals the other itme
     * @param {BaseItem} other
     * @returns {boolean}
     */
    equals(other) {
        if (this.getItemType() !== other.getItemType()) {
            return false;
        }
        return this.equalsImpl(other);
    }

    /**
     * Override for custom comparison
     * @abstract
     * @param {BaseItem} other
     * @returns {boolean}
     */
    equalsImpl(other) {
        abstract;
        return false;
    }

    /**
     * Draws the item at the given position
     * @param {number} x
     * @param {number} y
     * @param {DrawParameters} parameters
     * @param {number=} diameter
     */
    drawCentered(x, y, parameters, diameter) {}

    getBackgroundColorAsResource() {
        abstract;
        return "";
    }
}