queue.ts

export default class Queue {
    private static queue: {
        promise: () => Promise<unknown>;
        resolve: (value: unknown) => void;
        reject: (err: unknown) => void;
    }[] = [];
    private static isWorkingOnItemInQueue = false;

    static enqueue<T>(promise: () => Promise<T>) {
        return new Promise((resolve, reject) => {
            this.queue.push({
                promise,
                resolve,
                reject,
            });
            this.dequeue();
        });
    }

    static dequeue() {
        if (this.isWorkingOnItemInQueue) {
            return false;
        }
        const item = this.queue.shift();
        if (!item) {
            return false;
        }
        try {
            this.isWorkingOnItemInQueue = true;
            item.promise()
                .then((value) => {
                    this.isWorkingOnItemInQueue = false;
                    item.resolve(value);
                    this.dequeue();
                })
                .catch((err) => {
                    this.isWorkingOnItemInQueue = false;
                    item.reject(err);
                    this.dequeue();
                });
        } catch (err) {
            this.isWorkingOnItemInQueue = false;
            item.reject(err);
            this.dequeue();
        }
        return true;
    }
}