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PrivaPub/Extensions/StringExtensions.cs

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+using PrivaPub.ClientModels;
+
+using System.Security.Claims;
+
+namespace PrivaPub.Extensions
+{
+	public static class StringExtensions
+	{
+		public static string GetUserId(this ClaimsPrincipal claimsPrincipal)
+		{
+			return claimsPrincipal?.Claims?.FirstOrDefault(c => c.Type == ClaimTypes.UserData)?.Value;
+		}
+
+		public static string GetUserName(this ClaimsPrincipal claimsPrincipal)
+		{
+			var userId = claimsPrincipal.Claims.FirstOrDefault(c => c.Type == ClaimTypes.Name)?.Value;
+			return string.IsNullOrEmpty(userId) ? default : userId;
+		}
+
+		public static List<string> GetUserPolicies(this ClaimsPrincipal claimsPrincipal)
+		{
+			var policies = new List<string>();
+
+			if (claimsPrincipal.Claims.Any(c => c.Type == Policies.IsAdmin && bool.Parse(c.Value)))
+				policies.Add(Policies.IsAdmin);
+
+			if (claimsPrincipal.Claims.Any(c => c.Type == Policies.IsUser && bool.Parse(c.Value)))
+				policies.Add(Policies.IsUser);
+
+			if (claimsPrincipal.Claims.Any(c => c.Type == Policies.IsModerator && bool.Parse(c.Value)))
+				policies.Add(Policies.IsModerator);
+
+			return policies;
+		}
+	}
+}