107 lines
No EOL
4.4 KiB
C#
107 lines
No EOL
4.4 KiB
C#
using System.Collections.Generic;
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using System.Text.RegularExpressions;
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using BirdsiteLive.ActivityPub.Models;
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using BirdsiteLive.Common.Settings;
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namespace BirdsiteLive.Domain.Tools
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{
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public interface IStatusExtractor
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{
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(string content, Tag[] tags) ExtractTags(string messageContent);
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}
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public class StatusExtractor : IStatusExtractor
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{
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private readonly Regex _hastagRegex = new Regex(@"\W(\#[a-zA-Z0-9_ー]+\b)(?!;)");
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//private readonly Regex _hastagRegex = new Regex(@"(?<=[\s>]|^)#(\w*[a-zA-Z0-9_ー]+\w*)\b(?!;)");
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//private readonly Regex _hastagRegex = new Regex(@"(?<=[\s>]|^)#(\w*[a-zA-Z0-9_ー]+)\b(?!;)");
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private readonly Regex _mentionRegex = new Regex(@"\W(\@[a-zA-Z0-9_ー]+\b)(?!;)");
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//private readonly Regex _mentionRegex = new Regex(@"(?<=[\s>]|^)@(\w*[a-zA-Z0-9_ー]+\w*)\b(?!;)");
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//private readonly Regex _mentionRegex = new Regex(@"(?<=[\s>]|^)@(\w*[a-zA-Z0-9_ー]+)\b(?!;)");
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private readonly Regex _urlRegex = new Regex(@"((http|ftp|https):\/\/[\w\-_]+(\.[\w\-_]+)+([\w\-\.,@?^=%&:/~\+#]*[\w\-\@?^=%&/~\+#])?)");
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private readonly InstanceSettings _instanceSettings;
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#region Ctor
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public StatusExtractor(InstanceSettings instanceSettings)
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{
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_instanceSettings = instanceSettings;
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}
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#endregion
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public (string content, Tag[] tags) ExtractTags(string messageContent)
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{
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var tags = new List<Tag>();
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messageContent = $" {messageContent} ";
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// Extract Urls
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var urlMatch = _urlRegex.Matches(messageContent);
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foreach (var m in urlMatch)
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{
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var url = m.ToString().Replace("\n", string.Empty).Trim();
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var protocol = "https://";
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if (url.StartsWith("http://")) protocol = "http://";
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else if (url.StartsWith("ftp://")) protocol = "ftp://";
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var truncatedUrl = url.Replace(protocol, string.Empty);
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if (truncatedUrl.StartsWith("www."))
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{
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protocol += "www.";
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truncatedUrl = truncatedUrl.Replace("www.", string.Empty);
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}
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var firstPart = truncatedUrl;
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var secondPart = string.Empty;
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if (truncatedUrl.Length > 30)
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{
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firstPart = truncatedUrl.Substring(0, 30);
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secondPart = truncatedUrl.Substring(30);
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}
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messageContent = Regex.Replace(messageContent, m.ToString(),
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$@" <a href=""{url}"" rel=""nofollow noopener noreferrer"" target=""_blank""><span class=""invisible"">{protocol}</span><span class=""ellipsis"">{firstPart}</span><span class=""invisible"">{secondPart}</span></a>");
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}
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// Extract Hashtags
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var hashtagMatch = _hastagRegex.Matches(messageContent);
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foreach (var m in hashtagMatch)
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{
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var tag = m.ToString().Replace("#", string.Empty).Replace("\n", string.Empty).Trim();
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var url = $"https://{_instanceSettings.Domain}/tags/{tag}";
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tags.Add(new Tag
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{
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name = $"#{tag}",
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href = url,
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type = "Hashtag"
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});
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messageContent = Regex.Replace(messageContent, m.ToString(),
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$@" <a href=""{url}"" class=""mention hashtag"" rel=""tag"">#<span>{tag}</span></a>");
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}
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// Extract Mentions
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var mentionMatch = _mentionRegex.Matches(messageContent);
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foreach (var m in mentionMatch)
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{
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var mention = m.ToString().Replace("@", string.Empty).Replace("\n", string.Empty).Trim();
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var url = $"https://{_instanceSettings.Domain}/users/{mention}";
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var name = $"@{mention}@{_instanceSettings.Domain}";
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tags.Add(new Tag
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{
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name = name,
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href = url,
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type = "Mention"
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});
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messageContent = Regex.Replace(messageContent, m.ToString(),
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$@" <span class=""h-card""><a href=""https://{_instanceSettings.Domain}/@{mention}"" class=""u-url mention"">@<span>{mention}</span></a></span>");
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}
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return (messageContent.Trim(), tags.ToArray());
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}
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}
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} |