75 lines
2.2 KiB
C#
75 lines
2.2 KiB
C#
using System.Text.RegularExpressions;
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namespace Socialize.Infrastructure.YouTube;
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public static class YouTubeUrlHelper
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{
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private static readonly Regex VideoIdRegex = new(
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@"(?:youtube\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^""&?/\s]{11})",
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RegexOptions.Compiled | RegexOptions.IgnoreCase);
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private static readonly Regex ShortUrlRegex = new(
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@"^[a-zA-Z0-9_-]{11}$",
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RegexOptions.Compiled);
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/// <summary>
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/// Extracts the video ID from a YouTube URL or returns the input if it's already a video ID.
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/// </summary>
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/// <param name="input">The YouTube URL or video ID</param>
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/// <returns>The extracted video ID or null if invalid</returns>
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public static string? ExtractVideoId(string? input)
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{
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if (string.IsNullOrWhiteSpace(input))
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{
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return null;
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}
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// If it's already a valid video ID, return it
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if (IsValidVideoId(input))
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{
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return input;
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}
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// Try to extract video ID from URL
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Match match = VideoIdRegex.Match(input);
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return match.Success ? match.Groups[1].Value : null;
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}
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/// <summary>
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/// Validates if the input is a valid YouTube video ID.
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/// </summary>
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/// <param name="input">The video ID to validate</param>
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/// <returns>True if the input is a valid video ID</returns>
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public static bool IsValidVideoId(string? input)
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{
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if (string.IsNullOrWhiteSpace(input))
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{
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return false;
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}
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return ShortUrlRegex.IsMatch(input);
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}
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/// <summary>
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/// Validates if the input is a valid YouTube URL or video ID.
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/// </summary>
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/// <param name="input">The URL or video ID to validate</param>
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/// <returns>True if the input is a valid YouTube URL or video ID</returns>
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public static bool IsValidYouTubeUrlOrId(string? input)
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{
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if (string.IsNullOrWhiteSpace(input))
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{
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return false;
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}
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// Check if it's a valid video ID
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if (IsValidVideoId(input))
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{
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return true;
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}
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// Check if it's a valid YouTube URL
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return VideoIdRegex.IsMatch(input);
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}
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}
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