模拟更新下载对话框

var releaseNotes = "版本 v7.7.7\n" +
    "更新日志:\n" +
    "* 新增 若干Bug\n";
dialogs.build({
        title: "发现新版本",
        content: releaseNotes,
        positive: "立即下载",
        negative: "取消",
        neutral: "到浏览器下载"
    })
    .on("positive", download)
    .on("neutral", () => {
        app.openUrl("https://www.autojs.org");
    })
    .show();

var downloadDialog = null;
var downloadId = -1;

function download() {
    downloadDialog = dialogs.build({
            title: "下载中...",
            positive: "暂停",
            negative: "取消",
            progress: {
                max: 100,
                showMinMax: true
            },
            autoDismiss: false
        })
        .on("positive", () => {
            if (downloadDialog.getActionButton("positive") == "暂停") {
                stopDownload();
                downloadDialog.setActionButton("positive", "继续");
            } else {
                startDownload();
                downloadDialog.setActionButton("positive", "暂停");
            }
        })
        .on("negative", () => {
            stopDownload();
            downloadDialog.dismiss();
            downloadDialog = null;
        })
        .show();
    startDownload();
}

function startDownload() {
    downloadId = setInterval(() => {
        var p = downloadDialog.getProgress();
        if (p >= 100) {
            stopDownload();
            downloadDialog.dismiss();
            downloadDialog = null;
            toast("下载完成");
        } else {
            downloadDialog.setProgress(p + 1);
        }
    }, 100);
}

function stopDownload() {
    clearInterval(downloadId);
}