Initial commit: extracted from impostor-bbs gems/bbs

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/bbs/renderer.rb

@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+
+require 'erb'
+require 'artii'
+
+module BBS
+  class Renderer
+    def self.render(name, vars = {})
+      dir  = BBS.config.screens_dir or raise "BBS.config.screens_dir is not set"
+      path = File.join(dir, "#{name}.erb")
+      ctx  = Context.new(vars)
+      ERB.new(File.read(path), trim_mode: '-').result(ctx.ctx_binding).gsub("\n", "\r\n")
+    end
+
+    class Context
+      def initialize(vars)
+        vars.each { |k, v| instance_variable_set(:"@#{k}", v) }
+      end
+
+      def ctx_binding = binding
+
+      def banner(text, padding: 2)
+        inner = "#{' ' * padding}#{text}#{' ' * padding}"
+        bar   = '═' * inner.length
+        "#{green}╔#{bar}╗#{reset}\n" \
+        "#{green}║#{inner}║#{reset}\n" \
+        "#{green}╚#{bar}╝#{reset}"
+      end
+
+      def big_banner(text, font: 'slant')
+        Artii::Base.new(font: font).asciify(text)
+          .split("\n")
+          .map { |l| "  #{green}#{l}#{reset}" }
+          .join("\n")
+      end
+
+      def clr       = "\e[2J\e[H"
+      def reset     = "\e[0m"
+      def green     = "\e[1;32m"
+      def yellow    = "\e[1;33m"
+      def cyan      = "\e[1;36m"
+      def white     = "\e[1;37m"
+      def gray      = "\e[0;37m"
+      def red       = "\e[1;31m"
+      def dim_green = "\e[0;32m"
+    end
+  end
+end