new framework

lib/ui/windows/chat_window.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+module UI
+  module Windows
+    module_function
+
+    def chat(app, services:)
+      cols = app.cols
+      rows = app.rows
+      w = cols - 8
+      h = rows - 6
+      window = BBS::Window.new(title: ' Live Chat ')
+      window.layout(5, 3, w, h)
+      window.theme = app.theme
+
+      history = BBS::Widgets::ScrollView.new(lines: services[:chat].history.map { |l| format_line(l) })
+      history.layout(window.bounds.x + 2, window.bounds.y + 1, w - 4, h - 5)
+      window.add(history)
+      history.scroll = [history.lines.size - history.bounds.height, 0].max
+
+      input = BBS::Widgets::TextInput.new(placeholder: 'Type a message and press Enter…')
+      input.layout(window.bounds.x + 2, window.bounds.y + h - 3, w - 14, 1)
+      input.on_submit = lambda do |value, _|
+        next if value.strip.empty?
+        services[:chat].broadcast(app.context[:username] || 'Anonymous', value.strip)
+        input.value = ''
+        :handled
+      end
+      window.add(input)
+
+      close = BBS::Widgets::Button.new(label: '&Close',
+                                       on_click: ->(_) { app.close_window(window) })
+      close.layout(window.bounds.x + w - 11, window.bounds.y + h - 3, 9, 1)
+      window.add(close)
+
+      # Stash a poll lambda on the window so the app tick can pull updates
+      window.instance_variable_set(:@chat_poll, lambda do
+        new_lines = services[:chat].drain(app.session_id).map { |l| format_line(l) }
+        unless new_lines.empty?
+          history.lines = (history.lines + new_lines).last(500)
+          history.scroll = [history.lines.size - history.bounds.height, 0].max
+        end
+      end)
+
+      window.reset_focus
+      window.focus_manager.focus(input)
+      app.open_window(window)
+      window
+    end
+
+    def format_line(line)
+      "  \e[2;37m#{line.timestamp}\e[0m  \e[1;33m#{line.username}\e[0m: #{line.text}"
+    end
+  end
+end