Class: Clacky::Server::WebUIController

Inherits:
Object
  • Object
show all
Includes:
UIInterface
Defined in:
lib/clacky/server/web_ui_controller.rb

Overview

WebUIController implements UIInterface for the web server mode. Instead of writing to stdout, it broadcasts JSON events over WebSocket connections. Multiple browser tabs can subscribe to the same session_id.

request_confirmation blocks the calling thread until the browser sends a response, mirroring the behaviour of JsonUIController (which reads from stdin).

Constant Summary collapse

CONFIRMATION_TIMEOUT =

Blocking interaction ===

Emits a request_confirmation event and blocks until the browser responds. Timeout after 5 minutes to avoid hanging threads forever.

300

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from UIInterface

#start_progress, #stream_thinking_progress, #with_phase, #with_progress

Constructor Details

#initialize(session_id, broadcaster) ⇒ WebUIController

Returns a new instance of WebUIController.



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# File 'lib/clacky/server/web_ui_controller.rb', line 20

def initialize(session_id, broadcaster)
  @session_id  = session_id
  @broadcaster = broadcaster   # callable: broadcaster.call(session_id, event_hash)
  @mutex       = Mutex.new

  # Pending confirmation state: { id => ConditionVariable, result => value }
  @pending_confirmations = {}

  # Channel subscribers: array of objects implementing UIInterface.
  # All emitted events are forwarded to each subscriber after WebSocket broadcast.
  @channel_subscribers = []
  @subscribers_mutex   = Mutex.new
end

Instance Attribute Details

#session_id ⇒ Object (readonly)

Returns the value of attribute session_id.



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# File 'lib/clacky/server/web_ui_controller.rb', line 18

def session_id
  @session_id
end

Instance Method Details

#append_output(content) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 195

def append_output(content)
  emit("output", content: content)
  forward_to_subscribers { |sub| sub.append_output(content) }
end

#channel_subscribed? ⇒ Boolean

Returns true if any channel subscribers are registered.

Returns:

  • (Boolean) —

    true if any channel subscribers are registered



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# File 'lib/clacky/server/web_ui_controller.rb', line 50

def channel_subscribed?
  @subscribers_mutex.synchronize { !@channel_subscribers.empty? }
end

#clear_input ⇒ Object

Input control (no-ops in web mode) ===



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# File 'lib/clacky/server/web_ui_controller.rb', line 412

def clear_input; end

#deliver_confirmation(conf_id, result) ⇒ Object

Deliver a confirmation answer received from the browser. Called by the HTTP server when a confirmation message arrives over WebSocket.



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# File 'lib/clacky/server/web_ui_controller.rb', line 56

def deliver_confirmation(conf_id, result)
  @mutex.synchronize do
    pending = @pending_confirmations[conf_id]
    return unless pending

    pending[:result] = result
    pending[:cond].signal
  end
end

#emit(type, **data) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 435

def emit(type, **data)
  event = { type: type, session_id: @session_id }.merge(data)
  if (pid = Thread.current[:clacky_phase_id]) && !data.key?(:phase_id)
    event[:phase_id] = pid
  end
  @broadcaster.call(@session_id, event)
end

#forward_to_subscribers(&block) ⇒ Object

Forward a UIInterface call to all registered channel subscribers. Each subscriber is called in the same thread as the caller (Agent thread). Errors in individual subscribers are rescued and logged so they never interrupt the main agent execution.



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# File 'lib/clacky/server/web_ui_controller.rb', line 447

def forward_to_subscribers(&block)
  subscribers = @subscribers_mutex.synchronize { @channel_subscribers.dup }
  return if subscribers.empty?

  subscribers.each do |sub|
    block.call(sub)
  rescue StandardError => e
    Clacky::Logger.error("[WebUIController] channel subscriber error", error: e)
  end
end

#log(message, level: :info) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 246

def log(message, level: :info)
  emit("log", level: level.to_s, message: message)
  # Log forwarding intentionally skipped — too noisy for IM
end

#phase_end(phase_id, summary: nil) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 224

def phase_end(phase_id, summary: nil)
  # Clear thread-local before emitting end so the end event itself
  # doesn't get tagged with the phase_id it's closing.
  Thread.current[:clacky_phase_id] = nil if Thread.current[:clacky_phase_id] == phase_id
  event = { type: "phase_end", session_id: @session_id, phase_id: phase_id }
  event[:summary] = summary if summary
  @broadcaster.call(@session_id, event)
end

#phase_start(kind:, label: nil) ⇒ Object

Phase grouping ===



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# File 'lib/clacky/server/web_ui_controller.rb', line 214

def phase_start(kind:, label: nil)
  pid = SecureRandom.uuid
  Thread.current[:clacky_phase_id] = pid
  # Emit without auto-injection (the start event itself defines the phase)
  event = { type: "phase_start", session_id: @session_id, phase_id: pid, kind: kind.to_s }
  event[:label] = label if label
  @broadcaster.call(@session_id, event)
  pid
end

#replay_live_state ⇒ Object

Replay in-progress command state to a newly (re-)subscribing browser tab. all tool_stdout lines that fired while the user was away are lost. Replay live state when a client re-subscribes (e.g. after switching sessions).

Plan C: we do NOT re-emit tool_call here. The tool-item is already rendered in the DOM via the normal flow. We only replay:

1. progress(start) — restores the spinner / progress bar
2. tool_stdout     — fills in all stdout received so far

The frontend’s appendToolStdout will attach to the last visible .tool-item even when _liveLastToolItem is null (after the tab re-loaded).



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# File 'lib/clacky/server/web_ui_controller.rb', line 318

def replay_live_state
  return unless @live_progress_state

  # Replay complete progress state (not just message).
  # Include started_at (ms since epoch) so the frontend can resume the
  # elapsed-time counter from the correct origin instead of resetting to 0.
  state = @live_progress_state
  started_at_ms = @progress_start_time ? (@progress_start_time.to_f * 1000).round : nil

  emit("progress",
    message: state[:message],
    progress_type: state[:progress_type],
    phase: "active",
    status: "start",
    metadata: state[:metadata] || {},
    started_at: started_at_ms
  )

  buf = @live_stdout_buffer
  emit("tool_stdout", lines: buf) if buf && !buf.empty?
end

#request_confirmation(message, default: true) ⇒ Object

seconds



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# File 'lib/clacky/server/web_ui_controller.rb', line 379

def request_confirmation(message, default: true)
  conf_id = "conf_#{SecureRandom.hex(4)}"

  cond    = ConditionVariable.new
  pending = { cond: cond, result: nil }

  @mutex.synchronize { @pending_confirmations[conf_id] = pending }

  emit("request_confirmation", id: conf_id, message: message, default: default)

  # Notify channel subscribers that confirmation is pending — non-blocking.
  # They display a notice; the actual decision comes from the Web UI user.
  forward_to_subscribers { |sub| sub.show_warning("⏳ Confirmation requested: #{message}") }

  # Block until browser replies or timeout
  @mutex.synchronize do
    cond.wait(@mutex, CONFIRMATION_TIMEOUT)
    @pending_confirmations.delete(conf_id)
    result = pending[:result]

    # Timed out — use default
    return default if result.nil?

    case result.to_s.downcase
    when "yes", "y" then true
    when "no",  "n" then false
    else result.to_s
    end
  end
end

#set_idle_status ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 363

def set_idle_status
  # Clear any in-progress state when transitioning to idle
  if @live_progress_state
    emit("progress", phase: "done", status: "stop")
    @live_progress_state = nil
    @progress_start_time = nil
  end
  emit("session_update", status: "idle")
  forward_to_subscribers { |sub| sub.set_idle_status }
end

#set_input_tips(message, type: :info) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 413

def set_input_tips(message, type: :info); end

#set_working_status ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 358

def set_working_status
  emit("session_update", status: "working")
  forward_to_subscribers { |sub| sub.set_working_status }
end

#show_assistant_message(content, files:) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 87

def show_assistant_message(content, files:)
  return if (content.nil? || content.to_s.strip.empty?) && files.empty?

  # Rewrite local image paths (file:// and bare absolute) to /api/local-image
  # proxy URLs only for the browser, which runs on http://localhost and is
  # blocked by browser security policy from loading file:// directly.
  # Channel subscribers receive the original content so they can deliver
  # local images as native attachments via send_file().
  web_content = Clacky::Utils::FileProcessor.rewrite_local_image_urls(content.to_s)
  emit("assistant_message", content: web_content, files: files)
  forward_to_subscribers { |sub| sub.show_assistant_message(content, files: files) }
end

#show_complete(iterations:, cost:, duration: nil, cache_stats: nil, awaiting_user_feedback: false, cost_source: nil) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 181

def show_complete(iterations:, cost:, duration: nil, cache_stats: nil, awaiting_user_feedback: false, cost_source: nil)
  data = { iterations: iterations, cost: cost }
  data[:duration]               = duration            if duration
  data[:cache_stats]            = cache_stats         if cache_stats
  data[:awaiting_user_feedback] = awaiting_user_feedback if awaiting_user_feedback
  data[:cost_source]            = cost_source.to_s   if cost_source
  emit("complete", **data)
  forward_to_subscribers do |sub|
    sub.show_complete(iterations: iterations, cost: cost, duration: duration,
                      cache_stats: cache_stats, awaiting_user_feedback: awaiting_user_feedback,
                      cost_source: cost_source)
  end
end

#show_diff(old_content, new_content, max_lines: 50) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 172

def show_diff(old_content, new_content, max_lines: 50)
  emit("diff", old_size: old_content.bytesize, new_size: new_content.bytesize)
end

#show_error(message, code: nil, top_up_url: nil) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 233

def show_error(message, code: nil, top_up_url: nil)
  payload = { message: message }
  payload[:code] = code if code
  payload[:top_up_url] = top_up_url if top_up_url
  emit("error", **payload)
  forward_to_subscribers { |sub| sub.show_error(message, code: code, top_up_url: top_up_url) }
end

#show_feedback_request(question, context, options) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 100

def show_feedback_request(question, context, options)
  emit("request_feedback", question: question, context: context, options: options)
end

#show_file_edit_preview(path) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 157

def show_file_edit_preview(path)
  emit("file_preview", path: path, operation: "edit")
  forward_to_subscribers { |sub| sub.show_file_edit_preview(path) }
end

#show_file_error(error_message) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 162

def show_file_error(error_message)
  emit("file_error", error: error_message)
  forward_to_subscribers { |sub| sub.show_file_error(error_message) }
end

#show_file_write_preview(path, is_new_file:) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 152

def show_file_write_preview(path, is_new_file:)
  emit("file_preview", path: path, operation: "write", is_new_file: is_new_file)
  forward_to_subscribers { |sub| sub.show_file_write_preview(path, is_new_file: is_new_file) }
end

#show_info(message, prefix_newline: true) ⇒ Object

Status messages ===



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# File 'lib/clacky/server/web_ui_controller.rb', line 202

def show_info(message, prefix_newline: true)
  emit("info", message: message)
  forward_to_subscribers { |sub| sub.show_info(message) }
end

#show_progress(message = nil, prefix_newline: true, progress_type: "thinking", phase: "active", metadata: {}) ⇒ Object

Progress ===



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# File 'lib/clacky/server/web_ui_controller.rb', line 253

def show_progress(message = nil, prefix_newline: true, progress_type: "thinking", phase: "active", metadata: {})
  if phase == "active"
    # Only set start time when transitioning into a fresh progress phase.
    # Streaming LLM calls fire show_progress every chunk for token updates;
    # resetting the timer each time would make the elapsed counter jitter
    # back to 0 in the UI and force the frontend to rebuild its interval.
    if @live_progress_state.nil? || @live_progress_state[:progress_type] != progress_type
      @progress_start_time = Time.now
      @live_stdout_buffer = []
    end
    @live_progress_state = {
      message: message,
      progress_type: progress_type,
      metadata: metadata
    }
  elsif phase == "done"
    @live_tool_call = nil   # command finished — nothing left to replay
    # Keep @live_stdout_buffer intact — it will be reset on the next show_progress call.
    # This allows a brief replay window even after the command finishes.
    @live_progress_state = nil
    @progress_start_time = nil
  end
  
  data = {
    message: message,
    progress_type: progress_type,
    phase: phase,
    status: phase == "active" ? "start" : "stop"  # backward compat
  }
  data[:metadata] = metadata unless metadata.empty?
  # Always include started_at for "active" phase so the frontend can set the
  # correct timer origin even on the very first event (not just replay).
  if phase == "active" && @progress_start_time
    data[:started_at] = (@progress_start_time.to_f * 1000).round
  end
  data[:elapsed] = (Time.now - @progress_start_time).round(1) if phase == "done" && @progress_start_time
  
  emit("progress", **data)
  forward_to_subscribers { |sub| sub.show_progress(message) }
end

#show_shell_preview(command) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 167

def show_shell_preview(command)
  emit("shell_preview", command: command)
  forward_to_subscribers { |sub| sub.show_shell_preview(command) }
end

#show_success(message) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 241

def show_success(message)
  emit("success", message: message)
  forward_to_subscribers { |sub| sub.show_success(message) }
end

#show_token_usage(token_data) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 176

def show_token_usage(token_data)
  emit("token_usage", **token_data)
  # Token usage is internal detail — intentionally not forwarded
end

#show_tool_args(formatted_args) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 147

def show_tool_args(formatted_args)
  emit("tool_args", args: formatted_args)
  forward_to_subscribers { |sub| sub.show_tool_args(formatted_args) }
end

#show_tool_call(name, args) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 104

def show_tool_call(name, args)
  args_data = args.is_a?(String) ? (JSON.parse(args) rescue args) : args

  # Special handling for request_user_feedback — emit a dedicated UI event
  if name.to_s == "request_user_feedback"
    question = args_data.is_a?(Hash) ? (args_data[:question] || args_data["question"]).to_s : ""
    context  = args_data.is_a?(Hash) ? (args_data[:context]  || args_data["context"]).to_s  : ""
    options  = args_data.is_a?(Hash) ? (args_data[:options]  || args_data["options"])        : nil

    # Normalize options to array (guard against malformed data)
    options = Array(options) if options && !options.is_a?(Array)

    emit("request_feedback",
         question: question,
         context: context,
         options: options || [])
    # Don't forward to IM subscribers — they get the formatted text version already
    return
  end

  # Generate a human-readable summary using the tool's format_call method
  summary = tool_call_summary(name, args_data)

  # Remember the current in-flight tool call so replay_live_state can re-emit it
  # when a browser tab re-subscribes after switching sessions.
  @live_tool_call = { name: name, args: args_data, summary: summary }

  emit("tool_call", name: name, args: args_data, summary: summary)
  forward_to_subscribers { |sub| sub.show_tool_call(name, args_data) }
end

#show_tool_error(error) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 141

def show_tool_error(error)
  error_msg = error.is_a?(Exception) ? error.message : error.to_s
  emit("tool_error", error: error_msg)
  forward_to_subscribers { |sub| sub.show_tool_error(error) }
end

#show_tool_result(result) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 135

def show_tool_result(result)
  @live_tool_call = nil   # tool finished — no longer in-flight
  emit("tool_result", result: result)
  forward_to_subscribers { |sub| sub.show_tool_result(result) }
end

#show_tool_stdout(lines) ⇒ Object

Stream shell stdout/stderr lines to the browser while a command is running. Called immediately via on_output callback from shell.rb — no polling delay. Lines are also buffered in @live_stdout_buffer so late-joining subscribers (e.g. user switches away and back) can receive a replay of what they missed.



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# File 'lib/clacky/server/web_ui_controller.rb', line 298

def show_tool_stdout(lines)
  return if lines.nil? || lines.empty?
  @live_stdout_buffer ||= []
  @live_stdout_buffer.concat(lines)
  emit("tool_stdout", lines: lines)
  # Not forwarded to IM subscribers — too noisy
end

#show_user_message(content, created_at: nil, files: [], source: :web) ⇒ Object

Output display ===



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# File 'lib/clacky/server/web_ui_controller.rb', line 68

def show_user_message(content, created_at: nil, files: [], source: :web)
  data = { content: content }
  data[:created_at] = created_at if created_at
  # Build ev.images for the frontend renderer (history_user_message):
  #   - Images with data_url → pass the data_url directly (<img> thumbnail)
  #   - Disk files (PDF, doc, etc., no data_url) → "pdf:name" sentinel (renders a badge)
  rendered = Array(files).filter_map do |f|
    url  = f[:data_url] || f["data_url"]
    name = f[:name]     || f["name"]
    url || (name ? "pdf:#{name}" : nil)
  end
  data[:images] = rendered unless rendered.empty?
  emit("history_user_message", **data)
  # Only forward to channel subscribers when the message originated from the WebUI,
  # to avoid echoing channel messages back to the same channel.
  return unless source == :web
  forward_to_subscribers { |sub| sub.show_user_message(content) if sub.respond_to?(:show_user_message) }
end

#show_warning(message) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 207

def show_warning(message)
  emit("warning", message: message)
  forward_to_subscribers { |sub| sub.show_warning(message) }
end

#stop ⇒ Object

Lifecycle ===



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# File 'lib/clacky/server/web_ui_controller.rb', line 417

def stop
  emit("server_stop")
end

#subscribe_channel(subscriber) ⇒ void

This method returns an undefined value.

Register a channel subscriber (e.g. ChannelUIController). The subscriber will receive every UIInterface call that this controller handles.

Parameters:



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# File 'lib/clacky/server/web_ui_controller.rb', line 38

def subscribe_channel(subscriber)
  @subscribers_mutex.synchronize { @channel_subscribers << subscriber }
end

#tool_call_summary(name, args) ⇒ Object

Generate a short human-readable summary for a tool call display. Delegates to each tool’s own format_call method when available.



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# File 'lib/clacky/server/web_ui_controller.rb', line 424

def tool_call_summary(name, args)
  class_name = name.to_s.split("_").map(&:capitalize).join
  return nil unless Clacky::Tools.const_defined?(class_name)

  tool = Clacky::Tools.const_get(class_name).new
  args_sym = args.is_a?(Hash) ? args.transform_keys(&:to_sym) : {}
  tool.format_call(args_sym)
rescue StandardError
  nil
end

#unsubscribe_channel(subscriber) ⇒ void

This method returns an undefined value.

Remove a previously registered channel subscriber.

Parameters:

  • subscriber (Object) 


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# File 'lib/clacky/server/web_ui_controller.rb', line 45

def unsubscribe_channel(subscriber)
  @subscribers_mutex.synchronize { @channel_subscribers.delete(subscriber) }
end

#update_sessionbar(tasks: nil, cost: nil, cost_source: nil, status: nil, latency: nil) ⇒ Object

State updates ===



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# File 'lib/clacky/server/web_ui_controller.rb', line 342

def update_sessionbar(tasks: nil, cost: nil, cost_source: nil, status: nil, latency: nil)
  data = {}
  data[:tasks]       = tasks       if tasks
  data[:cost]        = cost        if cost
  data[:cost_source] = cost_source if cost_source
  data[:status]      = status      if status
  data[:latency]     = latency     if latency
  emit("session_update", **data) unless data.empty?
  forward_to_subscribers { |sub| sub.update_sessionbar(tasks: tasks, cost: cost, cost_source: cost_source, status: status, latency: latency) }
end

#update_todos(todos) ⇒ Object 



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# File 'lib/clacky/server/web_ui_controller.rb', line 353

def update_todos(todos)
  emit("todo_update", todos: todos)
  forward_to_subscribers { |sub| sub.update_todos(todos) }
end