Implement chat rendering and message handling with colored segments

src/EchoHub.Server/Controllers/UsersController.cs

@@ -0,0 +1,98 @@
+using System.Security.Claims;
+using EchoHub.Core.Constants;
+using EchoHub.Core.DTOs;
+using EchoHub.Server.Data;
+using EchoHub.Server.Services;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+
+namespace EchoHub.Server.Controllers;
+
+[ApiController]
+[Route("api/users")]
+public class UsersController(EchoHubDbContext db, ImageToAsciiService asciiService) : ControllerBase
+{
+    [HttpGet("{username}/profile")]
+    public async Task<IActionResult> GetProfile(string username)
+    {
+        var normalizedUsername = username.ToLowerInvariant().Trim();
+        var user = await db.Users.FirstOrDefaultAsync(u => u.Username == normalizedUsername);
+
+        if (user is null)
+            return NotFound(new { Error = "User not found." });
+
+        return Ok(ToProfileDto(user));
+    }
+
+    [HttpPut("profile")]
+    [Authorize]
+    public async Task<IActionResult> UpdateProfile([FromBody] UpdateProfileRequest request)
+    {
+        var userIdClaim = User.FindFirstValue(ClaimTypes.NameIdentifier);
+        if (userIdClaim is null)
+            return Unauthorized();
+
+        var userId = Guid.Parse(userIdClaim);
+        var user = await db.Users.FindAsync(userId);
+
+        if (user is null)
+            return NotFound(new { Error = "User not found." });
+
+        if (request.DisplayName is not null)
+            user.DisplayName = request.DisplayName.Trim();
+
+        if (request.Bio is not null)
+            user.Bio = request.Bio.Trim();
+
+        if (request.NicknameColor is not null)
+            user.NicknameColor = request.NicknameColor.Trim();
+
+        await db.SaveChangesAsync();
+
+        return Ok(ToProfileDto(user));
+    }
+
+    [HttpPost("avatar")]
+    [Authorize]
+    public async Task<IActionResult> UploadAvatar()
+    {
+        var userIdClaim = User.FindFirstValue(ClaimTypes.NameIdentifier);
+        if (userIdClaim is null)
+            return Unauthorized();
+
+        var userId = Guid.Parse(userIdClaim);
+        var user = await db.Users.FindAsync(userId);
+
+        if (user is null)
+            return NotFound(new { Error = "User not found." });
+
+        if (!Request.HasFormContentType || Request.Form.Files.Count == 0)
+            return BadRequest(new { Error = "No file uploaded." });
+
+        var file = Request.Form.Files[0];
+
+        if (file.Length > HubConstants.MaxAvatarSizeBytes)
+            return BadRequest(new { Error = $"File size exceeds maximum of {HubConstants.MaxAvatarSizeBytes / (1024 * 1024)} MB." });
+
+        using var stream = file.OpenReadStream();
+        var asciiArt = asciiService.ConvertToAscii(stream);
+
+        user.AvatarAscii = asciiArt;
+        await db.SaveChangesAsync();
+
+        return Ok(new { AvatarAscii = asciiArt });
+    }
+
+    private static UserProfileDto ToProfileDto(Core.Models.User user) => new(
+        user.Id,
+        user.Username,
+        user.DisplayName,
+        user.Bio,
+        user.NicknameColor,
+        user.AvatarAscii,
+        user.Status,
+        user.StatusMessage,
+        user.CreatedAt,
+        user.LastSeenAt);
+}