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BBCodeHelper.cs

using System.Text.RegularExpressions;
using Nop.Core.Domain.Common;
using Nop.Services.Html.CodeFormatter;

namespace Nop.Services.Html;

/// 
/// Represents a BBCode helper
/// 
public partial class BBCodeHelper : IBBCodeHelper
{
    #region Fields

    protected readonly CommonSettings _commonSettings;

    protected static readonly Regex _regexBold = new(@"\[b\](.+?)\[/b\]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
    protected static readonly Regex _regexItalic = new(@"\[i\](.+?)\[/i\]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
    protected static readonly Regex _regexUnderLine = new(@"\[u\](.+?)\[/u\]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
    protected static readonly Regex _regexUrl1 = new(@"\[url\=(https?:.+?)\]([^\]]+)\[/url\]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
    protected static readonly Regex _regexUrl2 = new(@"\[url\](https?:.+?)\[/url\]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
    protected static readonly Regex _regexQuote = new(@"\[quote=(.+?)\](.+?)\[/quote\]", RegexOptions.Compiled | RegexOptions.IgnoreCase);
    protected static readonly Regex _regexImg = new(@"\[img\](.+?)\[/img\]", RegexOptions.Compiled | RegexOptions.IgnoreCase);

    #endregion

    #region Ctor

    public BBCodeHelper(CommonSettings commonSettings)
    {
        _commonSettings = commonSettings;
    }

    #endregion

    #region Methods

    /// 
    /// Formats the text
    /// 
    /// Text
    /// A value indicating whether to replace Bold
    /// A value indicating whether to replace Italic
    /// A value indicating whether to replace Underline
    /// A value indicating whether to replace URL
    /// A value indicating whether to replace Code
    /// A value indicating whether to replace Quote
    /// A value indicating whether to replace Img
    /// Formatted text
    public virtual string FormatText(string text, bool replaceBold, bool replaceItalic,
        bool replaceUnderline, bool replaceUrl, bool replaceCode, bool replaceQuote, bool replaceImg)
    {
        if (string.IsNullOrEmpty(text))
            return string.Empty;

        if (replaceBold)
            // format the bold tags: [b][/b] becomes: 
            text = _regexBold.Replace(text, "$1");

        if (replaceItalic)
            // format the italic tags: [i][/i] becomes: 
            text = _regexItalic.Replace(text, "$1");

        if (replaceUnderline)
            // format the underline tags: [u][/u] becomes: 
            text = _regexUnderLine.Replace(text, "$1");

        if (replaceUrl)
        {
            var newWindow = _commonSettings.BbcodeEditorOpenLinksInNewWindow;
            // format the URL tags: [url=https://www.nopCommerce.com]my site[/url]
            // becomes: my site
            text = _regexUrl1.Replace(text, $"$2");

            // format the URL tags: [url]https://www.nopCommerce.com[/url]
            // becomes: https://www.nopCommerce.com
            text = _regexUrl2.Replace(text, $"$1");
        }

        if (replaceQuote)
            while (_regexQuote.IsMatch(text))
                text = _regexQuote.Replace(text, "$1 wrote:
$2
");

        if (replaceCode)
            text = CodeFormatHelper.FormatTextSimple(text);

        if (replaceImg)
            // format the img tags: [img]https://www.nopCommerce.com/Content/Images/Image.jpg[/img]
            // becomes: 
            text = _regexImg.Replace(text, "\"\"");

        return text;
    }

    /// 
    /// Removes all quotes from string
    /// 
    /// Source string
    /// string
    public virtual string RemoveQuotes(string str)
    {
        str = Regex.Replace(str, @"\[quote=(.+?)\]", string.Empty, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        str = Regex.Replace(str, @"\[/quote\]", string.Empty, RegexOptions.Compiled | RegexOptions.IgnoreCase);
        return str;
    }

    #endregion
}