Node.JS Basic Queue System

queue.js

class queue {
	// Local stuff to make our life more easy.
	_UIDGen(length) {
			var charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
			var retVal = "";
			for (var i = 0, n = charset.length; i < length; ++i) {
				retVal += charset.charAt(Math.floor(Math.random() * n));
			}
			return retVal;
	}
	_log(content) {
		if (this.storage.logging) {
			console.debug(`[${this.storage.UID}] ${content}`)
		}
	}
	_message(messageGiven) {
		var shitToPush = {timestamp:Date.now(),message:messageGiven}
		this.storage.messages.push(shitToPush);
		this.storage.currentMessage = shitToPush;
	}

	// Actual code starts here
	constructor(config) {
		if (config == undefined) {
			var config = {};
		}
		this.storage = {
			UID: this._UIDGen(8),
			threads: config.threads || 1,
			logging: config.log || false,
			items: [],
			messages: [],
			currentMessage: 'IDLE'
		}
		// Custom Settings for SeedBot
		if (SB != undefined && SB.parameters.debugMode) {
			this.storage.logging = true;
		}
		this._message(`QUEUE_NEW-${this.storage.UID}`);
	}
	add (callBack) {
		// Add this callback to the queue
		this.storage.items.push(callBack);
		this._message(`QUEUE_APPEND`);
	}
	clear (callBack) {
		this.storage.items = [];
		this._log(`[cacheQueue] Cleared queue.`);
		this._message(`QUEUE_CLEAR`);
		callBack(this.storage);
	}
	async start(callBack) {
		// start the queue.
		if (this.storage.items.length < 1) {
			// Nothing was given ;w;
			throw "No items were queued";
		}
		this.storage.queueStart = Date.now()
		this._message(`QUEUE_RUN-START`)
		for (const obj of this.storage.items) {
			await obj();
			this._message(`QUEUE_RUN-OBJDONE`);
		}
		this._message(`QUEUE_RUN-END`);
		this._message(`IDLE`);
		this.storage.queueEnd = Date.now()
		this.storage.queueDuration = this.storage.queueEnd - this.storage.queueStart;
		this._log(`[cacheQueue] Completed '${this.storage.items.length}' tasks in ${(this.storage.queueDuration/1000).toFixed(2)}s`);
		if (callBack != undefined) {
			callBack(this)
		} else {
			return this;
		}
	}
}

module.exports = queue;