126 lines
5.3 KiB
C#
126 lines
5.3 KiB
C#
// (c) Copyright Ascensio System SIA 2010-2022
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//
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// This program is a free software product.
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// You can redistribute it and/or modify it under the terms
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// of the GNU Affero General Public License (AGPL) version 3 as published by the Free Software
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// Foundation. In accordance with Section 7(a) of the GNU AGPL its Section 15 shall be amended
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// to the effect that Ascensio System SIA expressly excludes the warranty of non-infringement of
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// any third-party rights.
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//
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// This program is distributed WITHOUT ANY WARRANTY, without even the implied warranty
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// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For details, see
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// the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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//
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// You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia, EU, LV-1021.
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//
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// The interactive user interfaces in modified source and object code versions of the Program must
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// display Appropriate Legal Notices, as required under Section 5 of the GNU AGPL version 3.
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//
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// Pursuant to Section 7(b) of the License you must retain the original Product logo when
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// distributing the program. Pursuant to Section 7(e) we decline to grant you any rights under
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// trademark law for use of our trademarks.
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//
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// All the Product's GUI elements, including illustrations and icon sets, as well as technical writing
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// content are licensed under the terms of the Creative Commons Attribution-ShareAlike 4.0
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// International. See the License terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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namespace ASC.Notify.Textile;
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[Scope]
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public class JabberStyler : IPatternStyler
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{
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private static readonly Regex _velocityArguments
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= new Regex(NVelocityPatternFormatter.NoStylePreffix + "(?<arg>.*?)" + NVelocityPatternFormatter.NoStyleSuffix,
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RegexOptions.IgnoreCase | RegexOptions.Singleline | RegexOptions.Compiled);
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private static readonly Regex _linkReplacer
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= new Regex(@"""(?<text>[\w\W]+?)"":""(?<link>[^""]+)""",
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RegexOptions.Singleline | RegexOptions.Compiled);
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private static readonly Regex _textileReplacer
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= new Regex(@"(h1\.|h2\.|\*|h3\.|\^)",
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RegexOptions.Singleline | RegexOptions.Compiled);
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private static readonly Regex _brReplacer
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= new Regex(@"<br\s*\/*>",
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RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.IgnorePatternWhitespace
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| RegexOptions.Compiled | RegexOptions.Singleline);
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private static readonly Regex _closedTagsReplacer
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= new Regex(@"</(p|div)>",
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RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.IgnorePatternWhitespace
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| RegexOptions.Compiled | RegexOptions.Singleline);
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private static readonly Regex _tagReplacer
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= new Regex(@"<(.|\n)*?>",
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RegexOptions.IgnoreCase | RegexOptions.CultureInvariant | RegexOptions.IgnorePatternWhitespace
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| RegexOptions.Compiled | RegexOptions.Singleline);
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private static readonly Regex _multiLineBreaksReplacer
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= new Regex(@"(?:\r\n|\r(?!\n)|(?!<\r)\n){3,}",
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RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
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public void ApplyFormating(NoticeMessage message)
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{
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var sb = new StringBuilder();
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if (!string.IsNullOrEmpty(message.Subject))
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{
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sb.AppendLine(_velocityArguments.Replace(message.Subject, ArgMatchReplace));
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message.Subject = string.Empty;
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}
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if (string.IsNullOrEmpty(message.Body))
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{
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return;
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}
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var lines = message.Body.Split(new[] { Environment.NewLine, "\n" }, StringSplitOptions.None);
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for (var i = 0; i < lines.Length - 1; i++)
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{
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ref var line = ref lines[i];
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if (string.IsNullOrEmpty(line))
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{
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sb.AppendLine();
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continue;
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}
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line = _velocityArguments.Replace(line, ArgMatchReplace);
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sb.AppendLine(_linkReplacer.Replace(line, EvalLink));
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}
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ref var lastLine = ref lines[^1];
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lastLine = _velocityArguments.Replace(lastLine, ArgMatchReplace);
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sb.Append(_linkReplacer.Replace(lastLine, EvalLink));
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var body = sb.ToString();
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body = _textileReplacer.Replace(HttpUtility.HtmlDecode(body), ""); //Kill textile markup
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body = _brReplacer.Replace(body, Environment.NewLine);
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body = _closedTagsReplacer.Replace(body, Environment.NewLine);
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body = _tagReplacer.Replace(body, "");
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body = _multiLineBreaksReplacer.Replace(body, Environment.NewLine);
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message.Body = body;
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}
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private string EvalLink(Match match)
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{
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if (match.Success)
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{
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if (match.Groups["text"].Success && match.Groups["link"].Success)
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{
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if (match.Groups["text"].Value.Equals(match.Groups["link"].Value, StringComparison.OrdinalIgnoreCase))
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{
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return " " + match.Groups["text"].Value + " ";
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}
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return match.Groups["text"].Value + $" ( {match.Groups["link"].Value} )";
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}
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}
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return match.Value;
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}
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private string ArgMatchReplace(Match match)
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{
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return match.Result("${arg}");
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}
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}
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