var ctxPath = getContextPath();

function getContextPath() {
    var pathName = document.location.pathname;
    var index = pathName.substr(1).indexOf("/");
    var result = pathName.substr(0, index + 1);
    return result;
}

var lookFile = "http://192.168.0.14:18088/yncw/statics";  //文件路径

var filePreviewPathAll = "http://192.168.0.14:8012/onlinePreview?url=";
function isNull(str) {
    if(str ==null || str =="null" || str == undefined || str =="undefined" || str ==""){
        return true;
    }else{
        return false ;
    }
}

function isIntNum(val){
    var r = /^\+?[1-9][0-9]*$/;
    if(r.test(val)){
        return true;
    }else{
        return false;
    }
}

function onDownFile(url, filename) {
    this.getBlob(url, (blob) => {
        this.saveAs(blob, filename)
    })
}

function getBlob(url, cb) {
    var xhr = new XMLHttpRequest()
    xhr.open('GET', url, true)
    xhr.responseType = 'blob'
    xhr.onload = function() {
        if (xhr.status === 200) {
            cb(xhr.response)
        }
    }
    xhr.send()
}

function saveAs(blob, filename) {
    if (window.navigator.msSaveOrOpenBlob) {
        navigator.msSaveBlob(blob, filename)
    }
    else {
        var link = document.createElement('a')
        var body = document.querySelector('body')

        link.href = window.URL.createObjectURL(blob)
        link.download = filename

        link.style.display = 'none'
        body.appendChild(link)

        link.click()
        body.removeChild(link)
        window.URL.revokeObjectURL(link.href)
    }
}

/**
 * 数据格式化
 * @param accountNumber 账号
 * @returns {*|string} 格式化后的账号
 */
function maskAccountNumber(accountNumber) {
    if (!accountNumber) return '';
    const startLength = 3; // 显示前几位
    const endLength = 3; // 显示后几位
    const maskLength = accountNumber.length - startLength - endLength;
    if (maskLength <= 0) return accountNumber; // 如果需要隐藏的部分小于等于0，则直接返回原账号
    const maskedPart = '*'.repeat(maskLength);
    return accountNumber.substring(0, startLength) + maskedPart + accountNumber.substring(accountNumber.length - endLength);
}