registry.js

/**
 * Unfancy registry class to use for simple registry needs
 * Just a silly wrapper around Map()
 */
export default class Registry {
    constructor() {
        if (!Registry.instance) {
            this.registry = new Map();
            Registry.instance = this;
        }

        return Registry.instance;
    }

    /**
     * clear registry
     */
    clear() {
        this.registry.clear();
    }

    /**
     * get registry
     * @returns object - Map object
     */
    get() {
        return this.registry;
    }

    /**
     * 
     * @param {*} key 
     * @returns 
     */
    getValue(key) {
        return this.registry.get(key);
    }

    /**
     * Chainable setter, hence the return
     * 
     * @param {*} string - registry key to add or set
     * @param {*} any - values to register
     * @returns object - Map object 
     */
    setValue(key, val) {
        this.registry.set(key, val);
        return this;
    }

    /**
     * 
     * @param {*} key 
     */
    deleteValue(key) {
        this.registry.delete(key);
    }

    /**
     * 
     * @returns 
     */
    getEntriesIterator() {
        return this.registry.entries();
    }

    /**
     * 
     * @returns 
     */
    getValuesIterator() {
        return this.registry.values();
    }

    /**
     * @returns Iterator - all registry key in insertion order 
     */
    getKeys() {
        return this.registry.keys();
    }

    /**
     * 
     * @param {*} key 
     * @returns 
     */
    hasValue(key) {
        return this.registry.has(key);
    }
}