SOURCE

function runNextTime(key, ms, func) {
    let saveTime = Number(GM_getValue(key)) || 0
    let nowTime = Date.now()
    let dif = nowTime - saveTime
    let res = ms - dif < 0
    res && func(key)
    return res
}

function GM_getValue(key) {
    return JSON.parse(localStorage.getItem(key))
}

function GM_setValue(key, value) {
    localStorage.setItem(key, JSON.stringify(value))
}


class LocalQueue {
    constructor(key) {
        this.key = key
        this.queue = GM_getValue(key) || []
    }

    getQueue() {
        return GM_getValue(this.key)
    }

    setQueue(array) {
        this.queue = array
        GM_setValue(this.key, array)
    }

    push(value) {
        this.queue.push(value)
        GM_setValue(this.key, this.queue)
    }

    pop(asyncCallback) {
        let v = this.queue.pop()
        GM_setValue(this.key, this.queue)
        // let save = _ => GM_setValue(this.key, this.queue)
        // asyncCallback(save)
        return v
    }

    err(value) {
        GM_setValue(this.key+'_err', value)
    }
}

function sleep(ms) {
    return new Promise((resolv, reject) => {
        setTimeout(_ => {
            resolv()
        }, ms)
    })
}

function localQueue(key) {
    let q = GM_getValue(key) || []
}


// runNextTime('aaa', 5000, function(key) {
//     localStorage.setItem(key, Date.now())
// })