// 转义聊天内容中的特殊字符
function replaceContent(content, id, payment, width, height) {
    // 支持的html标签
    var html = function (end) {
        return new RegExp('\\n*\\[' + (end || '') + '(pre|div|span|p|table|thead|th|tbody|tr|td|ul|li|ol|li|dl|dt|dd|h2|h3|h4|h5)([\\s\\S]*?)\\]\\n*', 'g');
    };
    if (isNumber(content)) return content;
    content = (content || '').replace(/&(?!#?[a-zA-Z0-9]+;)/g, '&')
        .replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/'/g, '&#39;').replace(/"/g, '&quot;') // XSS
        .replace(/@(\S+)(\s+?|$)/g, '@<a href="javascript:;">$1</a>$2') // 转义@

        .replace(/face\[([^\s\[\]]+?)\]/g, function (face) {  // 转义表情
            var alt = face.replace(/^face/g, '');
            return '<img alt="' + alt + '" title="' + alt + '" src="' + faces[alt] + '">';
        })
        .replace(/img\[([^\s]+?)\]/g, function (img) {  // 转义图片
            if (payment) {
                return '<img class="layui-mylink-photos" onclick="payShowLayer(this)" id="' + id + '" payment="' + payment + '" src="' + img.replace(/(^img\[)|(\]$)/g, '') + '" width="' + width + '" height="' + height + '">';
            }
            return '<img id="' + id + '" onclick="showBigPic(this)" layer-src="' + img.replace(/(^img\[)|(\]$)/g, '') + '" src="' + img.replace(/(^img\[)|(\]$)/g, '') + '" width="' + width + '" height="' + height + '">';

        })
        .replace(/file\([\s\S]+?\)\[[\s\S]*?\]/g, function (str) { // 转义文件
            var href = (str.match(/file\(([\s\S]+?)\)\[/) || [])[1];
            var text = (str.match(/\)\[([\s\S]*?)\]/) || [])[1];
            if (!href) return str;
            return '<a class="layui-mylink-file" href="' + href + '" download target="_blank"><i class="layui-icon">&#xe61e;</i><cite>' + (text || href) + '</cite></a>';
        })
        .replace(/a\([\s\S]+?\)\[[\s\S]*?\]/g, function (str) { // 转义链接
            var href = (str.match(/a\(([\s\S]+?)\)\[/) || [])[1];
            var text = (str.match(/\)\[([\s\S]*?)\]/) || [])[1];
            if (!href) return str;
            return '<a href="' + href + '" target="_blank">' + (text || href) + '</a>';
        }).replace(html(), '\<$1 $2\>').replace(html('/'), '\</$1\>') // 转移HTML代码
        .replace(/\n/g, '<br>') // 转义换行

    return content;
};

// 表情替换
var faces = function () {
    var alt = getFacesIcon(), arr = {};
    layui.each(alt, function (index, item) {
        arr[item] = '/static/service/js/layui/images/face/' + index + '.png';
    });
    return arr;
}();

// 表情对应数组
function getFacesIcon() {
    return ["[白眼]", "[抱歉]", "[崩溃]", "[啵一个]", "[不理你了]", "[不要]", "[呲牙]", "[打呼]", "[担心]", "[得意]", "[发抖]",
        "[犯错]", "[愤怒]", "[感冒]", "[鬼脸]", "[汗]", "[吼吼]", "[焦虑]", "[惊呆]", "[囧]", "[可爱]", "[可怕]",
        "[冷汗]", "[冷漠]", "[脸红]", "[流鼻涕]", "[流口水]", "[流泪]", "[冒金星]", "[么么哒]", "[难受]", "[气死了]", "[色]", "[傻笑]", "[生气]",
        "[使眼色]", "[是吗]", "[睡]", "[思考]", "[天使]", "[调皮]", "[偷笑]", "[吐舌头]", "[微笑]", "[委屈]", "[无语]", "[嫌弃]", "[笑哭]",
        "[笑死了]"
    ]
}

function isNumber(value) {
    var patrn = /^(-)?\d+(\.\d+)?$/;
    if (patrn.exec(value) == null || value == "") {
        return false
    } else {
        return true
    }
}