Class: ChatsController

Inherits:
ApplicationController
  • Object
show all
Includes:
ChatManager::ChatManageable, ChatManager::CsvDownloadable, PromptNavigator::HistoryManageable
Defined in:
lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb

Defined Under Namespace

Classes: InvalidGenerationSettingsError

Instance Method Summary collapse

Instance Method Details

#create ⇒ Object 



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# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 55

def create
  jwt_token = current_user.id_token if user_signed_in?

  # Initialize chat sidebar
  initialize_chat current_user&.chats

  # Find or create chat
  @chat = Chat.find_or_switch_for_session(
    session,
    current_user
  )
  add_chat @chat
  @messages = @chat&.ordered_messages || []

  # initialize history for the chat
  initialize_history @chat&.ordered_by_descending_prompt_executions

  if params[:message].present?
    # Validate generation settings before proceeding (raises if invalid).
    # The streaming controller re-parses them from the URL.
    begin
      generation_settings_param
    rescue InvalidGenerationSettingsError => e
      @error_message = e.message
      respond_to do |format|
        format.turbo_stream
        format.html { redirect_to new_chat_path, alert: e.message }
      end
      return
    end

    # Add user message (will be rendered via turbo stream)
    @prompt_execution, @user_message = @chat.add_user_message(params[:message],
                                                              params[:api_key_uuid],
                                                              params[:model],
                                                              params[:branch_from_uuid])
    # Push to history for rendering
    push_to_history @prompt_execution
    # Set active message UUID for highlighting in UI
    set_active_message_uuid(@prompt_execution&.execution_id || params.dig(:chat, :branch_from_uuid))

    # The assistant response is streamed by ChatStreamsController (SSE).
    # The streaming bubble is rendered by create.turbo_stream.erb and opens
    # the EventSource on connect; persistence + title gen happen at stream close.
    @generation_settings_json = params[:generation_settings_json]
    @tool_ids = Array(params[:tool_ids]).reject(&:blank?)
  end

  # Return turbo stream to render both messages
  respond_to do |format|
    format.turbo_stream
    format.html { redirect_to new_chat_path }
  end
end

#edit ⇒ Object 



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# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 133

def edit
  # Initialize chat context
  initialize_chat current_user&.chats

  # Get LLM options available for users
  jwt_token = current_user.id_token if user_signed_in?
  @llm_families = LlmMetaClient::ServerResource.available_llm_families(jwt_token)

  @chat = Chat.find_or_switch_for_session(
    session,
    current_user
  )
  @messages = @chat&.ordered_messages || []
  # initialize history for the chat
  initialize_history @chat&.ordered_by_descending_prompt_executions
  # Set active message UUID for highlighting in UI
  set_active_message_uuid(params.dig(:chat, :branch_from_uuid))
rescue StandardError => e
  Rails.logger.error "Error in ChatsController#edit: #{e.class} - #{e.message}\n#{e.backtrace&.join("\n")}"
  @llm_families = []
  flash.now[:alert] = "Chat service is currently unavailable. Please try again later."
end

#new ⇒ Object 



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# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 34

def new
  initialize_chat current_user&.chats
  # Find current conversation or create it on create method if not found
  @chat = Chat.find_or_switch_for_session(
    session,
    current_user
  )
  add_chat @chat
  @messages = @chat&.ordered_messages || []
  # initialize history for the chat
  initialize_history @chat&.ordered_by_descending_prompt_executions

  # Get LLM options available for users
  jwt_token = current_user.id_token if user_signed_in?
  @llm_families = LlmMetaClient::ServerResource.available_llm_families(jwt_token)
rescue StandardError => e
  Rails.logger.error "Error in ChatsController#new: #{e.class} - #{e.message}\n#{e.backtrace&.join("\n")}"
  @llm_families = []
  flash.now[:alert] = "Chat service is currently unavailable. Please try again later."
end

#show ⇒ Object 



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# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 9

def show
  # Initialize chat context
  initialize_chat current_user&.chats

  @chat = current_user&.chats.includes(:messages).find_by!(uuid: params[:id])
  session[:chat_id] = @chat.id
  @messages = @chat.ordered_messages

  # Initialize history
  initialize_history @chat.ordered_by_descending_prompt_executions

  # Get LLM options available for users
  jwt_token = current_user.id_token if user_signed_in?
  @llm_families = LlmMetaClient::ServerResource.available_llm_families(jwt_token)

  # Set active UUID for history sidebar highlighting
  @prompt_execution = @chat.ordered_by_descending_prompt_executions.first
  set_active_message_uuid(@prompt_execution&.execution_id)

  render "chats/edit"
rescue StandardError => e
  Rails.logger.error "Error in PromptsController#show: #{e.class} - #{e.message}\n#{e.backtrace&.join("\n")}"
  redirect_to root_path, alert: "Message not found."
end

#start_new ⇒ Object 



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# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 128

def start_new
  session.delete(:chat_id)
  redirect_to root_path
end

#update ⇒ Object 



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# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 156

def update
  jwt_token = current_user.id_token if user_signed_in?

  # Use the chat identified by the URL, not the session
  @chat = current_user.chats.find(params[:id])
  session[:chat_id] = @chat.id
  @messages = @chat&.ordered_messages || []
  # initialize history for the chat
  initialize_history @chat&.ordered_by_descending_prompt_executions

  if params[:message].present?
    # Validate generation settings before proceeding (raises if invalid).
    # The streaming controller re-parses them from the URL.
    begin
      generation_settings_param
    rescue InvalidGenerationSettingsError => e
      @error_message = e.message
      respond_to do |format|
        format.turbo_stream
        format.html { redirect_to chat_path(@chat), alert: e.message }
      end
      return
    end

    # Add user message (will be rendered via turbo stream)
    @prompt_execution, @user_message = @chat.add_user_message(params[:message],
                                                             params[:api_key_uuid],
                                                             params[:model],
                                                             params[:branch_from_uuid])
    # Push to history for rendering
    push_to_history @prompt_execution
    # Set active message UUID for highlighting in UI
    set_active_message_uuid(@prompt_execution&.execution_id || params.dig(:chat, :branch_from_uuid))

    # The assistant response is streamed by ChatStreamsController (SSE).
    # See create action for details.
    @generation_settings_json = params[:generation_settings_json]
    @tool_ids = Array(params[:tool_ids]).reject(&:blank?)
  end

  # Return turbo stream to render both messages
  respond_to do |format|
    format.turbo_stream
    format.html { redirect_to new_chat_path }
  end
end

#update_title ⇒ Object 



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# File 'lib/generators/llm_meta_client/scaffold/templates/app/controllers/chats_controller.rb', line 110

def update_title
  chat = current_user.chats.find_by!(uuid: params[:id])
  title = params[:title].to_s.strip

  if title.blank?
    render json: { error: "Title cannot be blank" }, status: :unprocessable_entity
    return
  end

  title = title.truncate(255)
  chat.update!(title: title)

  render json: {
    title: title,
    truncated_title: title.truncate(30)
  }
end