Class: NvimMcpServer::UpdateBufferTool

Inherits:
BaseTool
  • Object
show all
Defined in:
lib/nvim-mcp-server/tools/update_buffer_tool.rb

Instance Method Summary collapse

Instance Method Details

#call(project_name:, file_path:, content:) ⇒ Object 



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# File 'lib/nvim-mcp-server/tools/update_buffer_tool.rb', line 13

def call(project_name:, file_path:, content:)
  socket_path = "/tmp/nvim-#{project_name}.sock"
  log(:info, "Updating buffer #{file_path} for project #{project_name} using socket #{socket_path}")

  result = {
    status: "success",
    project_name: project_name,
    socket_path: socket_path,
    file_path: file_path,
    updated: false,
    saved: false,
    reloaded: false
  }

  begin
    # Check if socket exists
    unless File.exist?(socket_path)
      result[:status] = "error"
      result[:message] = "Neovim socket not found: #{socket_path}"
      return result
    end

    # Connect to Neovim
    client = Neovim.attach_unix(socket_path)

    # Get all buffers to find the one with the specified file
    all_buffers = client.list_bufs
    target_buffer = nil

    all_buffers.each do |buffer|
      buffer_name = buffer.name

      # Skip unnamed buffers
      next if buffer_name.nil? || buffer_name.empty?

      # Check if this buffer matches the file path (exact match or ends with the path)
      if buffer_name == file_path || buffer_name.end_with?(file_path)
        target_buffer = buffer
        result[:actual_path] = buffer_name
        break
      end
    end

    if target_buffer.nil?
      result[:status] = "error"
      result[:message] = "Buffer not found for file: #{file_path}"
      return result
    end

    # Store original content info
    original_line_count = target_buffer.line_count
    result[:original_line_count] = original_line_count

    # Find a window displaying this buffer or use the current window
    windows = client.list_wins
    target_window = windows.find { |win| win.buffer.number == target_buffer.number }

    if target_window
      # If we found a window with this buffer, switch to it
      client.set_current_win(target_window)
    else
      # Otherwise, load the buffer in the current window
      client.command("buffer #{target_buffer.number}")
    end

    # Split content into lines
    new_lines = content.split("\n")
    result[:new_line_count] = new_lines.length

    # Replace the entire buffer content
    # First, delete all existing lines
    target_buffer.lines = new_lines
    result[:updated] = true

    # Save the buffer to disk
    client.command("write")
    result[:saved] = true
    log(:info, "Saved updated buffer: #{result[:actual_path]}")

    # Reload the buffer to ensure it's in sync
    client.command("edit")
    result[:reloaded] = true

    result[:message] = "Successfully updated, saved, and reloaded buffer"

    # Close the connection
    client.shutdown
  rescue => e
    log(:error, "Error updating buffer in Neovim using socket #{socket_path}: #{e.message}")

    # Handle connection and other errors gracefully
    result[:status] = "error"
    result[:message] = e.message
    result[:updated] = false
    result[:saved] = false
    result[:reloaded] = false
  end

  result
end