Class: Tina4::McpServer

Inherits:
Object
  • Object
show all
Defined in:
lib/tina4/mcp.rb

Overview

── McpServer ─────────────────────────────────────────────────────

Class Attribute Summary collapse

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(path, name: "Tina4 MCP", version: "1.0.0") ⇒ McpServer

Returns a new instance of McpServer.



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# File 'lib/tina4/mcp.rb', line 194

def initialize(path, name: "Tina4 MCP", version: "1.0.0")
  @path        = path.chomp("/")
  @name        = name
  @version     = version
  @tools       = {}
  @resources   = {}
  @initialized = false
  self.class.instances << self
end

Class Attribute Details

.instances ⇒ Object (readonly)

Returns the value of attribute instances.



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# File 'lib/tina4/mcp.rb', line 191

def instances
  @instances
end

Instance Attribute Details

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/tina4/mcp.rb', line 186

def name
  @name
end

#path ⇒ Object (readonly)

Returns the value of attribute path.



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# File 'lib/tina4/mcp.rb', line 186

def path
  @path
end

#version ⇒ Object (readonly)

Returns the value of attribute version.



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# File 'lib/tina4/mcp.rb', line 186

def version
  @version
end

Instance Method Details

#handle_message(raw_data) ⇒ Object

Process an incoming JSON-RPC message and return the response string.



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# File 'lib/tina4/mcp.rb', line 232

def handle_message(raw_data)
  begin
    method, params, request_id = McpProtocol.decode_request(raw_data)
  rescue ArgumentError => e
    return McpProtocol.encode_error(nil, McpProtocol::PARSE_ERROR, e.message)
  end

  handler_method = {
    "initialize"                 => :_handle_initialize,
    "notifications/initialized"  => :_handle_initialized,
    "tools/list"                 => :_handle_tools_list,
    "tools/call"                 => :_handle_tools_call,
    "resources/list"             => :_handle_resources_list,
    "resources/read"             => :_handle_resources_read,
    "ping"                       => :_handle_ping
  }[method]

  if handler_method.nil?
    return McpProtocol.encode_error(request_id, McpProtocol::METHOD_NOT_FOUND, "Method not found: #{method}")
  end

  begin
    result = send(handler_method, params)
    return "" if request_id.nil? # Notification -- no response
    McpProtocol.encode_response(request_id, result)
  rescue => e
    McpProtocol.encode_error(request_id, McpProtocol::INTERNAL_ERROR, e.message)
  end
end

#register_resource(uri, handler, description = "", mime_type = "application/json") ⇒ Object

Register a resource URI.



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# File 'lib/tina4/mcp.rb', line 221

def register_resource(uri, handler, description = "", mime_type = "application/json")
  @resources[uri] = {
    "uri"         => uri,
    "name"        => description.empty? ? uri : description,
    "description" => description.empty? ? uri : description,
    "mimeType"    => mime_type,
    "handler"     => handler
  }
end

#register_routes(router = nil) ⇒ Object

Register HTTP routes for this MCP server on the Tina4 router.



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# File 'lib/tina4/mcp.rb', line 263

def register_routes(router = nil)
  server   = self
  msg_path = "#{@path}/message"
  sse_path = "#{@path}/sse"

  Tina4::Router.post(msg_path) do |request, response|
    body = request.body
    raw  = body.is_a?(Hash) ? body : (body.is_a?(String) ? body : body.to_s)
    result = server.handle_message(raw)
    if result.nil? || result.empty?
      response.call("", 204)
    else
      response.call(JSON.parse(result))
    end
  end

  Tina4::Router.get(sse_path) do |request, response|
    endpoint_url = "#{request.url.sub(%r{/sse\z}, "")}/message"
    sse_data = "event: endpoint\ndata: #{endpoint_url}\n\n"
    response.call(sse_data, 200, "text/event-stream")
  end
end

#register_tool(name, handler, description = "", schema = nil) ⇒ Object

Register a tool callable.

Parameters:

  • name (String)
  • handler (Method, Proc, #call) —

    the callable

  • description (String) (defaults to: "")
  • schema (Hash, nil) (defaults to: nil) —

    override auto-detected schema



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# File 'lib/tina4/mcp.rb', line 210

def register_tool(name, handler, description = "", schema = nil)
  schema ||= Tina4.schema_from_method(handler)
  @tools[name] = {
    "name"        => name,
    "description" => description.empty? ? name : description,
    "inputSchema" => schema,
    "handler"     => handler
  }
end

#resources ⇒ Object

Access registered resources (for testing)



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# File 'lib/tina4/mcp.rb', line 316

def resources
  @resources
end

#tools ⇒ Object

Access registered tools (for testing)



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# File 'lib/tina4/mcp.rb', line 311

def tools
  @tools
end

#write_claude_config(port = 7145) ⇒ Object

Write/update .claude/settings.json with this MCP server config.



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# File 'lib/tina4/mcp.rb', line 287

def write_claude_config(port = 7145)
  config_dir = File.join(Dir.pwd, ".claude")
  FileUtils.mkdir_p(config_dir)
  config_file = File.join(config_dir, "settings.json")

  config = {}
  if File.exist?(config_file)
    begin
      config = JSON.parse(File.read(config_file))
    rescue JSON::ParserError, IOError
      # ignore corrupt file
    end
  end

  config["mcpServers"] ||= {}
  server_key = @name.downcase.gsub(" ", "-")
  config["mcpServers"][server_key] = {
    "url" => "http://localhost:#{port}#{@path}/sse"
  }

  File.write(config_file, JSON.pretty_generate(config) + "\n")
end