Yuebon.NetCore/Yuebon.Email.Core/MailMessage.cs

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using MimeKit;
using MimeKit.Text;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using Yuebon.Commons.Extend;
using Yuebon.Commons.Helpers;

namespace Yuebon.Email
{
    /// <summary>
    /// 邮件信息
    /// </summary>
    public static class MailMessage
    {
        /// <summary>
        /// 组装邮件文本/附件邮件信息
        /// </summary>
        /// <param name="mailBodyEntity">邮件消息实体</param>
        /// <returns></returns>
        public static MimeMessage AssemblyMailMessage(MailBodyEntity mailBodyEntity)
        {
            if (mailBodyEntity == null)
            {
                throw new ArgumentNullException(nameof(mailBodyEntity));
            }
            var message = new MimeMessage();

            //设置邮件基本信息
            SetMailBaseMessage(message, mailBodyEntity);

            var multipart = new Multipart("mixed");

            //插入文本消息
            if (!string.IsNullOrEmpty(mailBodyEntity.Body))
            {
                var alternative = new MultipartAlternative
                {
                    AssemblyMailTextMessage(mailBodyEntity.Body, mailBodyEntity.MailBodyType)
                 };
                multipart.Add(alternative);
            }
            if (mailBodyEntity.MailFiles != null)
            {
                //插入附件
                foreach (var mailFile in mailBodyEntity.MailFiles)
                {
                    if (mailFile.MailFilePath != null && File.Exists(mailFile.MailFilePath))
                    {
                        var mimePart = AssemblyMailAttachmentMessage(mailFile.MailFileType, mailFile.MailFileSubType,
                             mailFile.MailFilePath);
                        multipart.Add(mimePart);
                    }
                }
            }

            //组合邮件内容
            message.Body = multipart;