Add core models, DTOs, and services for EchoHub chat application

- Created User, Channel, Message, and ServerInfo models with necessary properties. - Added DTOs for user profiles, server information, and message handling. - Implemented JWT authentication service for user login and token generation. - Developed Entity Framework Core DbContext for database interactions. - Introduced SignalR ChatHub for real-time messaging and presence tracking. - Implemented file storage and image to ASCII conversion services. - Set up CORS and middleware for API endpoints. - Created launch settings and development configuration for server and web projects.
2026-09-04 23:34:10 +02:00 · 2026-02-18 13:52:19 +01:00
parent 20a341947a
commit cfa8b90d04
47 changed files with 4596 additions and 0 deletions
@@ -0,0 +1,76 @@
+using EchoHub.Core.Models;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+namespace EchoHub.Server.Data;
+
+public class EchoHubDbContext(DbContextOptions<EchoHubDbContext> options) : DbContext(options)
+{
+    public DbSet<User> Users => Set<User>();
+    public DbSet<Channel> Channels => Set<Channel>();
+    public DbSet<Message> Messages => Set<Message>();
+
+    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
+    {
+        if (!optionsBuilder.IsConfigured)
+        {
+            optionsBuilder.UseSqlite("Data Source=echohub.db");
+        }
+    }
+
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<User>(entity =>
+        {
+            entity.HasKey(u => u.Id);
+            entity.HasIndex(u => u.Username).IsUnique();
+            entity.Property(u => u.Username).IsRequired().HasMaxLength(50);
+            entity.Property(u => u.PasswordHash).IsRequired();
+            entity.Property(u => u.DisplayName).HasMaxLength(100);
+            entity.Property(u => u.Bio).HasMaxLength(500);
+            entity.Property(u => u.NicknameColor).HasMaxLength(7);
+            entity.Property(u => u.AvatarAscii).HasMaxLength(10000);
+            entity.Property(u => u.StatusMessage).HasMaxLength(100);
+        });
+
+        modelBuilder.Entity<Channel>(entity =>
+        {
+            entity.HasKey(c => c.Id);
+            entity.HasIndex(c => c.Name);
+            entity.Property(c => c.Name).IsRequired().HasMaxLength(100);
+            entity.Property(c => c.Topic).HasMaxLength(500);
+
+            entity.HasMany(c => c.Messages)
+                  .WithOne(m => m.Channel)
+                  .HasForeignKey(m => m.ChannelId)
+                  .OnDelete(DeleteBehavior.Cascade);
+        });
+
+        modelBuilder.Entity<Message>(entity =>
+        {
+            entity.HasKey(m => m.Id);
+            entity.HasIndex(m => m.SentAt);
+            entity.Property(m => m.Content).IsRequired().HasMaxLength(2000);
+            entity.Property(m => m.SenderUsername).IsRequired().HasMaxLength(50);
+            entity.Property(m => m.AttachmentUrl).HasMaxLength(500);
+            entity.Property(m => m.AttachmentFileName).HasMaxLength(255);
+        });
+
+        // SQLite does not support DateTimeOffset in ORDER BY clauses.
+        // Convert all DateTimeOffset properties to Unix milliseconds (long) for storage.
+        var dateTimeOffsetConverter = new ValueConverter<DateTimeOffset, long>(
+            v => v.ToUnixTimeMilliseconds(),
+            v => DateTimeOffset.FromUnixTimeMilliseconds(v));
+
+        foreach (var entityType in modelBuilder.Model.GetEntityTypes())
+        {
+            foreach (var property in entityType.GetProperties())
+            {
+                if (property.ClrType == typeof(DateTimeOffset) || property.ClrType == typeof(DateTimeOffset?))
+                {
+                    property.SetValueConverter(dateTimeOffsetConverter);
+                }
+            }
+        }
+    }
+}