Finished database management and user authentication

HopFrame.Database/Models/Entries/PermissionEntry.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace HopFrame.Database.Models.Entries;
+
+public sealed class PermissionEntry {
+    [Key, Required, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
+    public long RecordId { get; set; }
+
+    [Required, MaxLength(255)]
+    public string PermissionText { get; set; }
+
+    [Required, MinLength(36), MaxLength(36)]
+    public string UserId { get; set; }
+
+    [Required]
+    public DateTime GrantedAt { get; set; }
+}

HopFrame.Database/Models/Entries/TokenEntry.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace HopFrame.Database.Models.Entries;
+
+public class TokenEntry {
+    public const int RefreshTokenType = 0;
+    public const int AccessTokenType = 1;
+
+    /// <summary>
+    /// Defines the Type of the stored Token
+    /// 0: Refresh token
+    /// 1: Access token
+    /// </summary>
+    [Required, MinLength(1), MaxLength(1)]
+    public int Type { get; set; }
+
+    [Key, Required, MinLength(36), MaxLength(36)]
+    public string Token { get; set; }
+
+    [Required, MinLength(36), MaxLength(36)]
+    public string UserId { get; set; }
+
+    [Required]
+    public DateTime CreatedAt { get; set; }
+}

HopFrame.Database/Models/Entries/UserEntry.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace HopFrame.Database.Models.Entries;
+
+public class UserEntry {
+    [Key, Required, MinLength(36), MaxLength(36)]
+    public string Id { get; set; }
+    
+    [MaxLength(50)]
+    public string Username { get; set; }
+    
+    [Required, MaxLength(50), EmailAddress]
+    public string Email { get; set; }
+    
+    [Required, MinLength(8), MaxLength(255)]
+    public string Password { get; set; }
+
+    [Required]
+    public DateTime CreatedAt { get; set; }
+}

HopFrame.Database/Models/ModelExtensions.cs

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+using HopFrame.Database.Models.Entries;
+
+namespace HopFrame.Database.Models;
+
+public static class ModelExtensions {
+
+    public static User ToUserModel(this UserEntry entry, HopDbContextBase contextBase) {
+        var user = new User {
+            Id = Guid.Parse(entry.Id),
+            Username = entry.Username,
+            Email = entry.Email,
+            CreatedAt = entry.CreatedAt
+        };
+
+        user.Permissions = contextBase.Permissions
+            .Where(perm => perm.UserId == entry.Id)
+            .Select(perm => perm.PermissionText)
+            .ToList();
+
+        return user;
+    }
+    
+}

HopFrame.Database/Models/User.cs

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+namespace HopFrame.Database.Models;
+
+public class User {
+    public Guid Id { get; set; }
+    public string Username { get; set; }
+    public string Email { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public IList<string> Permissions { get; set; }
+}