118 lines
4.2 KiB
C#
118 lines
4.2 KiB
C#
using System;
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using System.Globalization;
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using Microsoft.AspNetCore.Http;
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namespace FrontOffice.Main.Utilities;
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public interface IDeviceDetector
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{
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DeviceInfo Detect(string? userAgent = null);
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bool IsMobile(string? userAgent = null);
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bool IsTablet(string? userAgent = null);
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bool IsDesktop(string? userAgent = null);
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}
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public sealed class DeviceDetector : IDeviceDetector
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{
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private readonly IHttpContextAccessor _httpContextAccessor;
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public DeviceDetector(IHttpContextAccessor httpContextAccessor)
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{
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_httpContextAccessor = httpContextAccessor ?? throw new ArgumentNullException(nameof(httpContextAccessor));
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}
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public DeviceInfo Detect(string? userAgent = null)
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{
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string? headerUa = null;
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var http = _httpContextAccessor.HttpContext;
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if (http != null)
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{
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headerUa = http.Request.Headers["User-Agent"].ToString();
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}
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var ua = userAgent ?? headerUa ?? string.Empty;
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var uaLower = ua.ToLower(CultureInfo.InvariantCulture);
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// Bots
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if (ContainsAny(uaLower, "bot", "spider", "crawler", "bingpreview", "facebookexternalhit"))
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{
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return new DeviceInfo(DeviceType.Bot, DetectOs(uaLower), DetectBrowser(uaLower), ua);
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}
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var type = DetectDeviceType(uaLower);
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var os = DetectOs(uaLower);
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var browser = DetectBrowser(uaLower);
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return new DeviceInfo(type, os, browser, ua);
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}
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public bool IsMobile(string? userAgent = null) => Detect(userAgent).Type == DeviceType.Mobile;
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public bool IsTablet(string? userAgent = null) => Detect(userAgent).Type == DeviceType.Tablet;
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public bool IsDesktop(string? userAgent = null) => Detect(userAgent).Type == DeviceType.Desktop;
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private static DeviceType DetectDeviceType(string uaLower)
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{
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if (string.IsNullOrWhiteSpace(uaLower)) return DeviceType.Unknown;
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// Tablets
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if (ContainsAny(uaLower, "ipad", "tablet", "kindle", "silk", "playbook"))
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return DeviceType.Tablet;
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// Mobiles (exclude tablets when possible)
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if (ContainsAny(uaLower, "mobi", "iphone", "ipod", "android") && !uaLower.Contains("tablet"))
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return DeviceType.Mobile;
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// Smart TV
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if (ContainsAny(uaLower, "smart-tv", "smarttv", "hbbtv", "appletv"))
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return DeviceType.Desktop; // treat TVs as desktop-like
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return DeviceType.Desktop;
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}
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private static string DetectOs(string uaLower)
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{
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if (string.IsNullOrWhiteSpace(uaLower)) return "Unknown";
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if (uaLower.Contains("windows nt")) return "Windows";
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if (uaLower.Contains("android")) return "Android";
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if (uaLower.Contains("iphone") || uaLower.Contains("ipad") || uaLower.Contains("ipod") || uaLower.Contains("ios")) return "iOS";
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if (uaLower.Contains("mac os x") || uaLower.Contains("macintosh")) return "macOS";
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if (uaLower.Contains("linux")) return "Linux";
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if (uaLower.Contains("cros")) return "ChromeOS";
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return "Unknown";
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}
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private static string DetectBrowser(string uaLower)
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{
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if (string.IsNullOrWhiteSpace(uaLower)) return "Unknown";
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if (uaLower.Contains("edg/")) return "Edge"; // Chromium Edge
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if (uaLower.Contains("edge/")) return "Edge"; // Legacy Edge
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if (uaLower.Contains("opr/") || uaLower.Contains("opera")) return "Opera";
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if (uaLower.Contains("chrome/") && !uaLower.Contains("edg/") && !uaLower.Contains("opr/") && !uaLower.Contains("chromium")) return "Chrome";
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if (uaLower.Contains("safari") && !uaLower.Contains("chrome")) return "Safari";
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if (uaLower.Contains("firefox")) return "Firefox";
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if (uaLower.Contains("msie") || uaLower.Contains("trident/")) return "IE";
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if (uaLower.Contains("chromium")) return "Chromium";
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return "Unknown";
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}
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private static bool ContainsAny(string source, params string[] values)
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{
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foreach (var v in values)
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{
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if (source.Contains(v)) return true;
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}
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return false;
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}
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}
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public enum DeviceType
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{
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Unknown = 0,
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Mobile = 1,
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Tablet = 2,
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Desktop = 3,
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Bot = 4
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}
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public sealed record DeviceInfo(DeviceType Type, string Os, string Browser, string UserAgent);
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