public with sharing class AttachmentPreviewController {
    /*目前仅供签收单使用 开发简档给119、  2S6 、2S7 、系统管理员*/

    //附件的parentId
	public String parentId { get; private set; }
    //所有附件
	public list<Attachment> attachMentList { get; private set; }
    //构造bean类 用于判断是否显示 电子签收单的附件类型
    public AttachmentInfo attachmentInfo  {get;set;}
    //判断标识 用于判断是否显示 电子签收单的附件类型 电子签收单默认true
    public Boolean isShow {get;set;}
   
    //初始化方法
	 public void init() {
        //获取页面参数
	 	 this.parentId = ApexPages.currentPage().getParameters().get('parentId');
	 	try {
            //判断url是否有id
            if (String.isNotBlank(this.parentId)) {
            	//初始化的状态默认就是true
            	this.isShow=true;
             this.attachMentList = [SELECT id,parentId,Name,ContentType 
	 	   											from Attachment where parentId = :parentId 
	 	   											order by createddate desc];
            //如果有非电子签收命名规则的附件 则isShow置成false 页面不显示该列
	 	   	for(Attachment attachment:attachMentList){
	 	   		//attachment.Name.substring(0,1);
	 	   		if(attachment.Name.substring(0,1)=='A'){
	 	   			attachment.ContentType='经销商';

	 	   		}
				else if(attachment.Name.substring(0,1)=='H'){
					attachment.ContentType='医院';
				}
				else if(attachment.Name.substring(0,2)!='H-' && attachment.Name.substring(0,2)!='A-'){
					this.isShow=false;
				}
	 	   	}
            //构造方法
            attachmentInfo = new AttachmentInfo(attachMentList, isShow); 
        }
           System.debug('attachmentInfo:'+attachmentInfo);
           System.debug('attachMentList:'+attachMentList);
        } catch (Exception ex) {
            ApexPages.addMessages(ex);
        }
}
   
    public class AttachmentInfo {
        public list<Attachment> attachMentList { get;set; }
        public Boolean isShow      {get; set;}

        public AttachmentInfo(list<Attachment> attachMentList, Boolean isShow  ) {
            this.attachMentList = attachMentList;
            this.isShow = isShow;
        }
        
        
    }
 //    public AttachmentPreviewController() {

	// }
}