Class: DebugMcp::Tools::InspectObject

Inherits:
MCP::Tool
  • Object
show all
Defined in:
lib/debug_mcp/tools/inspect_object.rb

Class Method Summary collapse

Class Method Details

.call(expression:, session_id: nil, server_context:) ⇒ Object 



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# File 'lib/debug_mcp/tools/inspect_object.rb', line 35

def call(expression:, session_id: nil, server_context:)
  client = server_context[:session_manager].client(session_id)
  client.auto_repause!

  parts = []

  # RT 1: Get the pretty-printed value (primary - if this fails, expression is invalid)
  value_output = client.send_command("pp #{expression}")
  parts << "Value:\n#{value_output}"

  # RT 2: Get class + instance variables (+ class variables if Module) in a single command
  begin
    meta_output = client.send_command(
      "p [(#{expression}).class.to_s, (#{expression}).instance_variables, " \
      "(#{expression}).is_a?(Module) ? (#{expression}).class_variables : nil]",
    )
    class_name, ivars, cvars = parse_meta(meta_output)
    parts << "Class: #{class_name}" if class_name
    parts << "Instance variables: #{ivars}" if ivars

    # RT 3: Get class variable values (only for Module/Class with class variables)
    if cvars && cvars != "[]"
      begin
        cvar_values = client.send_command(
          "pp Hash[(#{expression}).class_variables.map{|v|" \
          "[v,begin;(#{expression}).class_variable_get(v);rescue;'(error)';end]}]",
        )
        parts << "Class variables:\n#{cvar_values}"
      rescue DebugMcp::TimeoutError
        parts << "Class variables: #{cvars}"
      end
    elsif cvars
      parts << "Class variables: #{cvars}"
    end
  rescue DebugMcp::TimeoutError
    parts << "Class: (timed out)"
    parts << "Instance variables: (timed out)"
  end

  text = parts.join("\n\n")
  text = append_trap_context_note(client, text)
  if (http_note = PendingHttpHelper.pending_http_note(client))
    text = "#{text}\n\n#{http_note}"
  end
  MCP::Tool::Response.new([{ type: "text", text: text }])
rescue DebugMcp::Error => e
  MCP::Tool::Response.new([{ type: "text", text: "Error: #{e.message}" }])
end