/*!
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@Title: layui.upload 单文件上传 - 全浏览器兼容版
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@Author: 贤心
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@License：MIT
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*/
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layui.define(['layer-mobile', 'zepto'] , function(exports){
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"use strict";
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var $ = layui.zepto;
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var layer = layui['layer-mobile'];
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var device = layui.device();
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var elemDragEnter = 'layui-upload-enter';
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var elemIframe = 'layui-upload-iframe';
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var msgConf = {
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icon: 2
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,shift: 6
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}, fileType = {
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file: '文件'
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,video: '视频'
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,audio: '音频'
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};
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layer.msg = function(content){
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return layer.open({
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content: content || ''
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,skin: 'msg'
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,time: 2 //2秒后自动关闭
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});
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};
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var Upload = function(options){
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this.options = options;
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};
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//初始化渲染
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Upload.prototype.init = function(){
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var that = this, options = that.options;
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var body = $('body'), elem = $(options.elem || '.layui-upload-file');
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var iframe = $('<iframe id="'+ elemIframe +'" class="'+ elemIframe +'" name="'+ elemIframe +'"></iframe>');
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//插入iframe
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$('#'+elemIframe)[0] || body.append(iframe);
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return elem.each(function(index, item){
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item = $(item);
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var form = '<form target="'+ elemIframe +'" method="'+ (options.method||'post') +'" key="set-mine" enctype="multipart/form-data" action="'+ (options.url||'') +'"></form>';
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var type = item.attr('lay-type') || options.type; //获取文件类型
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//包裹ui元素
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if(!options.unwrap){
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form = '<div class="layui-box layui-upload-button">' + form + '<span class="layui-upload-icon"><i class="layui-icon"></i>'+ (
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item.attr('lay-title') || options.title|| ('上传'+ (fileType[type]||'图片') )
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) +'</span></div>';
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}
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form = $(form);
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//拖拽支持
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if(!options.unwrap){
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form.on('dragover', function(e){
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e.preventDefault();
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$(this).addClass(elemDragEnter);
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}).on('dragleave', function(){
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$(this).removeClass(elemDragEnter);
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}).on('drop', function(){
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$(this).removeClass(elemDragEnter);
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});
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}
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//如果已经实例化，则移除包裹元素
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if(item.parent('form').attr('target') === elemIframe){
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if(options.unwrap){
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item.unwrap();
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} else {
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item.parent().next().remove();
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item.unwrap().unwrap();
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}
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};
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//包裹元素
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item.wrap(form);
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//触发上传
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item.off('change').on('change', function(){
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that.action(this, type);
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});
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});
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};
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//提交上传
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Upload.prototype.action = function(input, type){
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var that = this, options = that.options, val = input.value;
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var item = $(input), ext = item.attr('lay-ext') || options.ext || ''; //获取支持上传的文件扩展名;
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if(!val){
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return;
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};
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//校验文件
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switch(type){
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case 'file': //一般文件
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if(ext && !RegExp('\\w\\.('+ ext +')$', 'i').test(escape(val))){
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layer.msg('不支持该文件格式', msgConf);
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return input.value = '';
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}
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break;
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case 'video': //视频文件
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if(!RegExp('\\w\\.('+ (ext||'avi|mp4|wma|rmvb|rm|flash|3gp|flv') +')$', 'i').test(escape(val))){
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layer.msg('不支持该视频格式', msgConf);
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return input.value = '';
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}
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break;
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case 'audio': //音频文件
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if(!RegExp('\\w\\.('+ (ext||'mp3|wav|mid') +')$', 'i').test(escape(val))){
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layer.msg('不支持该音频格式', msgConf);
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return input.value = '';
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}
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break;
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default: //图片文件
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if(!RegExp('\\w\\.('+ (ext||'jpg|png|gif|bmp|jpeg') +')$', 'i').test(escape(val))){
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layer.msg('不支持该图片格式', msgConf);
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return input.value = '';
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}
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break;
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}
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options.before && options.before(input);
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item.parent().submit();
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var iframe = $('#'+elemIframe), timer = setInterval(function() {
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var res;
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try {
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res = iframe.contents().find('body').text();
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} catch(e) {
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layer.msg('上传接口存在跨域', msgConf);
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clearInterval(timer);
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}
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if(res){
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clearInterval(timer);
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iframe.contents().find('body').html('');
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try {
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res = JSON.parse(res);
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} catch(e){
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res = {};
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return layer.msg('请对上传接口返回JSON字符', msgConf);
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}
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typeof options.success === 'function' && options.success(res, input);
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}
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}, 30);
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input.value = '';
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};
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//暴露接口
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exports('upload-mobile', function(options){
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var upload = new Upload(options = options || {});
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upload.init();
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});
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});
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