Added Categories

Wave/Data/ApplicationDbContext.cs

@@ -51,6 +51,25 @@ public class ApplicationDbContext(DbContextOptions<ApplicationDbContext> options
                 .HasConversion(dateTimeOffsetUtcConverter);
 
             article.HasQueryFilter(a => !a.IsDeleted);
+            article.ToTable("Articles");
+        });
+
+        builder.Entity<Category>(category => {
+            category.HasKey(c => c.Id);
+            category.Property(c => c.Name).IsRequired().HasMaxLength(128);
+            category.Property(c => c.Color).IsRequired().HasDefaultValue(CategoryColors.Default);
+
+            category.HasMany<Article>().WithMany()
+                .UsingEntity<ArticleCategory>(
+                    ac => ac.HasOne(a => a.Article).WithMany().OnDelete(DeleteBehavior.NoAction), 
+                    ac => ac.HasOne(a => a.Category).WithMany().OnDelete(DeleteBehavior.NoAction), 
+                    articleCategory => {
+                        articleCategory.HasKey(ac => ac.Id);
+                        articleCategory.ToTable("ArticleCategories");
+                        articleCategory.HasQueryFilter(ac => !ac.Article.IsDeleted);
+                    });
+            
+            category.ToTable("Categories");
         });
     }
 }

Wave/Data/Article.cs

@@ -8,7 +8,7 @@ public enum ArticleStatus {
     Published = 2
 }
 
-// TODO:: Add category / tags for MVP
+// TODO:: Add tags for MVP ?
 // TODO:: Archive System (Notice / Redirect to new content?) (Deprecation date?)
 // TODO:: Reference used files?
 

Wave/Data/ArticleCategory.cs

@@ -0,0 +1,7 @@
+namespace Wave.Data;
+
+public class ArticleCategory {
+    public int Id { get; set; }
+    public required Article Article { get; set; }
+    public required Category Category { get; set; }
+}

Wave/Data/Category.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Wave.Data;
+// We want to order categories based on their Color/Role, 
+// so more  important ones can be displayed first
+public enum CategoryColors {
+    Primary = 1, 
+    Dangerous = 5, 
+    Important = 10, 
+    Informative = 15, 
+    Secondary = 20,
+    Default = 25, 
+    Extra = 50, 
+}
+
+public class Category {
+    public Guid Id { get; set; }
+    
+    [MaxLength(128)]
+    public required string Name { get; set; }
+    public CategoryColors Color { get; set; } = CategoryColors.Default;
+}

Wave/Data/Migrations/postgres/20240126112644_Categories.Designer.cs

@@ -0,0 +1,465 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+using Wave.Data;
+
+#nullable disable
+
+namespace Wave.Data.Migrations.postgres
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20240126112644_Categories")]
+    partial class Categories
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.0")
+                .HasAnnotation("Relational:MaxIdentifierLength", 63);
+
+            NpgsqlModelBuilderExtensions.UseIdentityByDefaultColumns(modelBuilder);
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRole", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex");
+
+                    b.ToTable("AspNetRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("text");
+
+                    b.Property<string>("RoleId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<string>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("text");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("text");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("text");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<string>", b =>
+                {
+                    b.Property<string>("UserId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("RoleId")
+                        .HasColumnType("text");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<string>", b =>
+                {
+                    b.Property<string>("UserId")
+                        .HasColumnType("text");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("text");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("text");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens", (string)null);
+                });
+
+            modelBuilder.Entity("Wave.Data.ApplicationUser", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("text");
+
+                    b.Property<string>("AboutTheAuthor")
+                        .IsRequired()
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Biography")
+                        .IsRequired()
+                        .HasMaxLength(4096)
+                        .HasColumnType("character varying(4096)");
+
+                    b.Property<string>("BiographyHtml")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("FullName")
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("text");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("text");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex");
+
+                    b.ToTable("AspNetUsers", (string)null);
+                });
+
+            modelBuilder.Entity("Wave.Data.Article", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("AuthorId")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Body")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("BodyHtml")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTimeOffset>("CreationDate")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("now()");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTimeOffset>("LastModified")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("now()");
+
+                    b.Property<DateTimeOffset>("PublishDate")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("ReviewerId")
+                        .HasColumnType("text");
+
+                    b.Property<int>("Status")
+                        .HasColumnType("integer");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("AuthorId");
+
+                    b.HasIndex("ReviewerId");
+
+                    b.ToTable("Articles", (string)null);
+                });
+
+            modelBuilder.Entity("Wave.Data.ArticleCategory", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<Guid>("ArticleId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid>("CategoryId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ArticleId");
+
+                    b.HasIndex("CategoryId");
+
+                    b.ToTable("ArticleCategories", (string)null);
+                });
+
+            modelBuilder.Entity("Wave.Data.Category", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("Color")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(25);
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Categories", (string)null);
+                });
+
+            modelBuilder.Entity("Wave.Data.ProfilePicture", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ApplicationUserId")
+                        .HasColumnType("text");
+
+                    b.Property<Guid>("ImageId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ApplicationUserId")
+                        .IsUnique();
+
+                    b.ToTable("ProfilePictures", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<string>", b =>
+                {
+                    b.HasOne("Wave.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
+                {
+                    b.HasOne("Wave.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<string>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Wave.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<string>", b =>
+                {
+                    b.HasOne("Wave.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Wave.Data.Article", b =>
+                {
+                    b.HasOne("Wave.Data.ApplicationUser", "Author")
+                        .WithMany()
+                        .HasForeignKey("AuthorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("Wave.Data.ApplicationUser", "Reviewer")
+                        .WithMany()
+                        .HasForeignKey("ReviewerId")
+                        .OnDelete(DeleteBehavior.SetNull);
+
+                    b.Navigation("Author");
+
+                    b.Navigation("Reviewer");
+                });
+
+            modelBuilder.Entity("Wave.Data.ArticleCategory", b =>
+                {
+                    b.HasOne("Wave.Data.Article", "Article")
+                        .WithMany()
+                        .HasForeignKey("ArticleId")
+                        .OnDelete(DeleteBehavior.NoAction)
+                        .IsRequired();
+
+                    b.HasOne("Wave.Data.Category", "Category")
+                        .WithMany()
+                        .HasForeignKey("CategoryId")
+                        .OnDelete(DeleteBehavior.NoAction)
+                        .IsRequired();
+
+                    b.Navigation("Article");
+
+                    b.Navigation("Category");
+                });
+
+            modelBuilder.Entity("Wave.Data.ProfilePicture", b =>
+                {
+                    b.HasOne("Wave.Data.ApplicationUser", null)
+                        .WithOne("ProfilePicture")
+                        .HasForeignKey("Wave.Data.ProfilePicture", "ApplicationUserId")
+                        .OnDelete(DeleteBehavior.SetNull);
+                });
+
+            modelBuilder.Entity("Wave.Data.ApplicationUser", b =>
+                {
+                    b.Navigation("ProfilePicture");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Wave/Data/Migrations/postgres/20240126112644_Categories.cs

@@ -0,0 +1,157 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
+
+#nullable disable
+
+namespace Wave.Data.Migrations.postgres;
+
+/// <inheritdoc />
+public partial class Categories : Migration {
+    /// <inheritdoc />
+    protected override void Up(MigrationBuilder migrationBuilder) {
+        migrationBuilder.DropForeignKey(
+            name: "FK_Article_AspNetUsers_AuthorId",
+            table: "Article");
+
+        migrationBuilder.DropForeignKey(
+            name: "FK_Article_AspNetUsers_ReviewerId",
+            table: "Article");
+
+        migrationBuilder.DropPrimaryKey(
+            name: "PK_Article",
+            table: "Article");
+
+        migrationBuilder.RenameTable(
+            name: "Article",
+            newName: "Articles");
+
+        migrationBuilder.RenameIndex(
+            name: "IX_Article_ReviewerId",
+            table: "Articles",
+            newName: "IX_Articles_ReviewerId");
+
+        migrationBuilder.RenameIndex(
+            name: "IX_Article_AuthorId",
+            table: "Articles",
+            newName: "IX_Articles_AuthorId");
+
+        migrationBuilder.AddPrimaryKey(
+            name: "PK_Articles",
+            table: "Articles",
+            column: "Id");
+
+        migrationBuilder.CreateTable(
+            name: "Categories",
+            columns: table => new {
+                Id = table.Column<Guid>(type: "uuid", nullable: false),
+                Name = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false),
+                Color = table.Column<int>(type: "integer", nullable: false, defaultValue: 25)
+            },
+            constraints: table => { table.PrimaryKey("PK_Categories", x => x.Id); });
+
+        migrationBuilder.CreateTable(
+            name: "ArticleCategories",
+            columns: table => new {
+                Id = table.Column<int>(type: "integer", nullable: false)
+                    .Annotation("Npgsql:ValueGenerationStrategy",
+                        NpgsqlValueGenerationStrategy.IdentityByDefaultColumn),
+                ArticleId = table.Column<Guid>(type: "uuid", nullable: false),
+                CategoryId = table.Column<Guid>(type: "uuid", nullable: false)
+            },
+            constraints: table => {
+                table.PrimaryKey("PK_ArticleCategories", x => x.Id);
+                table.ForeignKey(
+                    name: "FK_ArticleCategories_Articles_ArticleId",
+                    column: x => x.ArticleId,
+                    principalTable: "Articles",
+                    principalColumn: "Id");
+                table.ForeignKey(
+                    name: "FK_ArticleCategories_Categories_CategoryId",
+                    column: x => x.CategoryId,
+                    principalTable: "Categories",
+                    principalColumn: "Id");
+            });
+
+        migrationBuilder.CreateIndex(
+            name: "IX_ArticleCategories_ArticleId",
+            table: "ArticleCategories",
+            column: "ArticleId");
+
+        migrationBuilder.CreateIndex(
+            name: "IX_ArticleCategories_CategoryId",
+            table: "ArticleCategories",
+            column: "CategoryId");
+
+        migrationBuilder.AddForeignKey(
+            name: "FK_Articles_AspNetUsers_AuthorId",
+            table: "Articles",
+            column: "AuthorId",
+            principalTable: "AspNetUsers",
+            principalColumn: "Id",
+            onDelete: ReferentialAction.Cascade);
+
+        migrationBuilder.AddForeignKey(
+            name: "FK_Articles_AspNetUsers_ReviewerId",
+            table: "Articles",
+            column: "ReviewerId",
+            principalTable: "AspNetUsers",
+            principalColumn: "Id",
+            onDelete: ReferentialAction.SetNull);
+    }
+
+    /// <inheritdoc />
+    protected override void Down(MigrationBuilder migrationBuilder) {
+        migrationBuilder.DropForeignKey(
+            name: "FK_Articles_AspNetUsers_AuthorId",
+            table: "Articles");
+
+        migrationBuilder.DropForeignKey(
+            name: "FK_Articles_AspNetUsers_ReviewerId",
+            table: "Articles");
+
+        migrationBuilder.DropTable(
+            name: "ArticleCategories");
+
+        migrationBuilder.DropTable(
+            name: "Categories");
+
+        migrationBuilder.DropPrimaryKey(
+            name: "PK_Articles",
+            table: "Articles");
+
+        migrationBuilder.RenameTable(
+            name: "Articles",
+            newName: "Article");
+
+        migrationBuilder.RenameIndex(
+            name: "IX_Articles_ReviewerId",
+            table: "Article",
+            newName: "IX_Article_ReviewerId");
+
+        migrationBuilder.RenameIndex(
+            name: "IX_Articles_AuthorId",
+            table: "Article",
+            newName: "IX_Article_AuthorId");
+
+        migrationBuilder.AddPrimaryKey(
+            name: "PK_Article",
+            table: "Article",
+            column: "Id");
+
+        migrationBuilder.AddForeignKey(
+            name: "FK_Article_AspNetUsers_AuthorId",
+            table: "Article",
+            column: "AuthorId",
+            principalTable: "AspNetUsers",
+            principalColumn: "Id",
+            onDelete: ReferentialAction.Cascade);
+
+        migrationBuilder.AddForeignKey(
+            name: "FK_Article_AspNetUsers_ReviewerId",
+            table: "Article",
+            column: "ReviewerId",
+            principalTable: "AspNetUsers",
+            principalColumn: "Id",
+            onDelete: ReferentialAction.SetNull);
+    }
+}

Wave/Data/Migrations/postgres/ApplicationDbContextModelSnapshot.cs

@@ -262,8 +262,7 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                     b.Property<bool>("IsDeleted")
                         .HasColumnType("boolean");
 
-                    b.Property<DateTimeOffset?>("LastModified")
+                    b.Property<DateTimeOffset>("LastModified")
-                        .IsRequired()
                         .ValueGeneratedOnAdd()
                         .HasColumnType("timestamp with time zone")
                         .HasDefaultValueSql("now()");
@@ -288,7 +287,51 @@ protected override void BuildModel(ModelBuilder modelBuilder)
 
                     b.HasIndex("ReviewerId");
 
-                    b.ToTable("Article");
+                    b.ToTable("Articles", (string)null);
+                });
+
+            modelBuilder.Entity("Wave.Data.ArticleCategory", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer");
+
+                    NpgsqlPropertyBuilderExtensions.UseIdentityByDefaultColumn(b.Property<int>("Id"));
+
+                    b.Property<Guid>("ArticleId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid>("CategoryId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ArticleId");
+
+                    b.HasIndex("CategoryId");
+
+                    b.ToTable("ArticleCategories", (string)null);
+                });
+
+            modelBuilder.Entity("Wave.Data.Category", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<int>("Color")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("integer")
+                        .HasDefaultValue(25);
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Categories", (string)null);
                 });
 
             modelBuilder.Entity("Wave.Data.ProfilePicture", b =>
@@ -382,6 +425,25 @@ protected override void BuildModel(ModelBuilder modelBuilder)
                     b.Navigation("Reviewer");
                 });
 
+            modelBuilder.Entity("Wave.Data.ArticleCategory", b =>
+                {
+                    b.HasOne("Wave.Data.Article", "Article")
+                        .WithMany()
+                        .HasForeignKey("ArticleId")
+                        .OnDelete(DeleteBehavior.NoAction)
+                        .IsRequired();
+
+                    b.HasOne("Wave.Data.Category", "Category")
+                        .WithMany()
+                        .HasForeignKey("CategoryId")
+                        .OnDelete(DeleteBehavior.NoAction)
+                        .IsRequired();
+
+                    b.Navigation("Article");
+
+                    b.Navigation("Category");
+                });
+
             modelBuilder.Entity("Wave.Data.ProfilePicture", b =>
                 {
                     b.HasOne("Wave.Data.ApplicationUser", null)

Wave/Program.cs

@@ -63,6 +63,7 @@
     .AddPolicy("ArticleEditPermissions", p => p.RequireRole("Author", "Admin"))
     .AddPolicy("ArticleReviewPermissions", p => p.RequireRole("Reviewer", "Admin"))
     .AddPolicy("ArticleDeletePermissions", p => p.RequireRole("Moderator", "Admin"))
+    .AddPolicy("CategoryManagePermissions", p => p.RequireRole("Admin"))
     .AddPolicy("RoleAssignPermissions", p => p.RequireRole("Admin"))
     
     .AddPolicy("ArticleEditOrReviewPermissions", p => p.RequireRole("Author", "Reviewer", "Admin"));