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Code Issues 2 Packages Projects Releases 10 Wiki Activity

feat: enhance profile editing with avatar support and UI adjustments

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- Added AvatarPath to ProfileEditResult for user profile updates.
- Updated ProfileEditDialog to include avatar selection with a browse button.
- Increased dialog height to accommodate new avatar input fields.
- Implemented avatar file path handling in the profile edit dialog.

feat: introduce moderation features and user roles

- Added ServerRole enum to define user roles (Member, Mod, Admin, Owner).
- Extended User model to include role, mute, and ban status.
- Created ModerationController for user role assignment, kicking, banning, and muting.
- Implemented methods in IChatBroadcaster and SignalRBroadcaster for user moderation actions.
- Updated database schema with new columns for user roles and moderation states.

fix: ensure muted users cannot send messages

- Added mute status checks in ChatService to prevent message sending for muted users.
- Updated user presence and status handling to reflect role changes and moderation actions.

chore: update constants for ASCII art rendering

- Introduced AsciiArtHeightHalfBlock constant for improved ASCII art rendering.
This commit is contained in:
HueByte
2026-02-19 17:47:10 +01:00
parent 257ac34224
commit b4c3ebd254
28 changed files with 1457 additions and 73 deletions
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src/EchoHub.Server/Services/ImageToAsciiService.cs
+45 -20
View File
@@ -8,47 +8,72 @@ namespace EchoHub.Server.Services;
public class ImageToAsciiService
{
private static readonly char[] AsciiChars = " .:-=+*#%@".ToCharArray();
public string ConvertToAscii(Stream imageStream, int width = HubConstants.AsciiArtWidth, int height = HubConstants.AsciiArtHeight)
/// <summary>
/// Converts an image to ASCII art using half-block characters (▀▄█) with
/// 24-bit ANSI foreground and background colors for 2x vertical resolution.
/// Each character cell represents two vertical pixels.
/// </summary>
public string ConvertToAscii(Stream imageStream, int width = HubConstants.AsciiArtWidth, int height = HubConstants.AsciiArtHeightHalfBlock)
{
using var image = Image.Load<Rgba32>(imageStream);
// Ensure height is even for pair processing
if (height % 2 != 0) height++;
image.Mutate(x => x.Resize(width, height));
var sb = new StringBuilder();
byte lastR = 0, lastG = 0, lastB = 0;
bool hasLastColor = false;
for (int y = 0; y < image.Height; y++)
for (int y = 0; y < image.Height; y += 2)
{
byte lastFgR = 0, lastFgG = 0, lastFgB = 0;
byte lastBgR = 0, lastBgG = 0, lastBgB = 0;
bool hasLastColor = false;
for (int x = 0; x < image.Width; x++)
{
var pixel = image[x, y];
var brightness = 0.299 * pixel.R + 0.587 * pixel.G + 0.114 * pixel.B;
var topPixel = image[x, y];
var bottomPixel = (y + 1 < image.Height) ? image[x, y + 1] : topPixel;
// Map brightness (0-255) to ASCII char index
var index = (int)((brightness / 255.0) * (AsciiChars.Length - 1));
byte fgR, fgG, fgB, bgR, bgG, bgB;
char blockChar;
// Emit ANSI 24-bit color only when it changes
if (!hasLastColor || pixel.R != lastR || pixel.G != lastG || pixel.B != lastB)
if (topPixel.R == bottomPixel.R && topPixel.G == bottomPixel.G && topPixel.B == bottomPixel.B)
{
sb.Append($"\x1b[38;2;{pixel.R};{pixel.G};{pixel.B}m");
lastR = pixel.R;
lastG = pixel.G;
lastB = pixel.B;
hasLastColor = true;
// Both pixels same color — full block
fgR = topPixel.R; fgG = topPixel.G; fgB = topPixel.B;
bgR = topPixel.R; bgG = topPixel.G; bgB = topPixel.B;
blockChar = '\u2588'; // █
}
else
{
// Top pixel = foreground, bottom pixel = background, upper half block
fgR = topPixel.R; fgG = topPixel.G; fgB = topPixel.B;
bgR = bottomPixel.R; bgG = bottomPixel.G; bgB = bottomPixel.B;
blockChar = '\u2580'; // ▀
}
sb.Append(AsciiChars[index]);
// Emit color codes only when they change
bool fgChanged = !hasLastColor || fgR != lastFgR || fgG != lastFgG || fgB != lastFgB;
bool bgChanged = !hasLastColor || bgR != lastBgR || bgG != lastBgG || bgB != lastBgB;
if (fgChanged)
sb.Append($"\x1b[38;2;{fgR};{fgG};{fgB}m");
if (bgChanged)
sb.Append($"\x1b[48;2;{bgR};{bgG};{bgB}m");
sb.Append(blockChar);
lastFgR = fgR; lastFgG = fgG; lastFgB = fgB;
lastBgR = bgR; lastBgG = bgG; lastBgB = bgB;
hasLastColor = true;
}
// Reset color at end of line
sb.Append("\x1b[0m");
hasLastColor = false;
if (y < image.Height - 1)
if (y + 2 < image.Height)
{
sb.AppendLine();
}