Class: Desiru::API::SinatraIntegration

Inherits:
Object
  • Object
show all
Includes:
PersistenceExtension
Defined in:
lib/desiru/api/sinatra_integration.rb

Overview

Sinatra integration for Desiru - lightweight REST API generation

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from PersistenceExtension

#with_persistence

Constructor Details

#initialize(async_enabled: true, stream_enabled: false) ⇒ SinatraIntegration

Returns a new instance of SinatraIntegration.



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# File 'lib/desiru/api/sinatra_integration.rb', line 14

def initialize(async_enabled: true, stream_enabled: false)
  @modules = {}
  @async_enabled = async_enabled
  @stream_enabled = stream_enabled
end

Instance Attribute Details

#async_enabled ⇒ Object (readonly)

Returns the value of attribute async_enabled.



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# File 'lib/desiru/api/sinatra_integration.rb', line 12

def async_enabled
  @async_enabled
end

#modules ⇒ Object (readonly)

Returns the value of attribute modules.



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# File 'lib/desiru/api/sinatra_integration.rb', line 12

def modules
  @modules
end

#stream_enabled ⇒ Object (readonly)

Returns the value of attribute stream_enabled.



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# File 'lib/desiru/api/sinatra_integration.rb', line 12

def stream_enabled
  @stream_enabled
end

Instance Method Details

#generate_api ⇒ Object

Generate a Sinatra application with all registered modules



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# File 'lib/desiru/api/sinatra_integration.rb', line 29

def generate_api
  modules_config = @modules
  async = @async_enabled
  stream = @stream_enabled

  Class.new(Sinatra::Base) do
    set :show_exceptions, false
    set :raise_errors, true

    # Helpers for parameter validation and response formatting
    helpers do
      def validate_type(value, type_string)
        case type_string.to_s.downcase
        when 'string', 'str'
          value.is_a?(String)
        when 'integer', 'int'
          value.is_a?(Integer) || (value.is_a?(String) && value.match?(/\A-?\d+\z/))
        when 'float'
          value.is_a?(Numeric)
        when 'boolean', 'bool'
          [true, false, 'true', 'false'].include?(value)
        when /^list/
          value.is_a?(Array)
        else
          true # Unknown types and literals pass validation
        end
      end

      def coerce_value(value, type_string)
        case type_string.to_s.downcase
        when 'integer', 'int'
          value.to_i
        when 'float'
          value.to_f
        when 'boolean', 'bool'
          ['true', true].include?(value)
        else
          value
        end
      end

      def format_response(result)
        if result.is_a?(Desiru::ModuleResult)
          result.data
        elsif result.is_a?(Hash)
          result
        else
          { result: result }
        end
      end

      def handle_async_request(desiru_module, inputs)
        result = desiru_module.call_async(inputs)

        {
          job_id: result.job_id,
          status: result.status,
          progress: result.progress,
          status_url: "/api/v1/jobs/#{result.job_id}"
        }
      end

      def parse_json_body
        request.body.rewind
        JSON.parse(request.body.read)
      rescue JSON::ParserError
        halt 400, json(error: 'Invalid JSON')
      end
    end

    # Content type handling
    before do
      content_type :json
    end

    # Health check endpoint
    get '/api/v1/health' do
      json status: 'ok', timestamp: Time.now.iso8601
    end

    # Generate endpoints for each registered module
    modules_config.each do |path, config|
      desiru_module = config[:module]

      # Main module endpoint
      post "/api/v1#{path}" do
        params = parse_json_body

        # Convert string keys to symbols for module call
        symbolized_params = {}
        params.each { |k, v| symbolized_params[k.to_sym] = v }

        begin
          result = desiru_module.call(symbolized_params)
          json format_response(result)
        rescue Desiru::ModuleError => e
          halt 400, json(error: e.message)
        rescue StandardError => e
          halt 500, json(error: e.message)
        end
      end

      # Async endpoint
      if async && desiru_module.respond_to?(:call_async)
        post "/api/v1/async#{path}" do
          params = parse_json_body

          begin
            result = handle_async_request(desiru_module, params)
            status 202
            json result
          rescue StandardError => e
            halt 500, json(error: e.message)
          end
        end
      end

      # Streaming endpoint (Server-Sent Events)
      next unless stream && desiru_module.respond_to?(:call_stream)

      post "/api/v1/stream#{path}" do
        content_type 'text/event-stream'
        stream do |out|
          params = parse_json_body

          begin
            desiru_module.call_stream(params) do |chunk|
              out << "event: chunk\n"
              out << "data: #{JSON.generate(chunk)}\n\n"
            end

            # Send final result
            result = desiru_module.call(params)
            out << "event: result\n"
            out << "data: #{JSON.generate(format_response(result))}\n\n"
            out << "event: done\n"
            out << "data: #{JSON.generate({ status: 'complete' })}\n\n"
          rescue StandardError => e
            out << "event: error\n"
            out << "data: #{JSON.generate(error: e.message)}\n\n"
          ensure
            out.close
          end
        end
      end
    end

    # Job status endpoint for async requests
    if async
      get '/api/v1/jobs/:job_id' do
        job_id = params[:job_id]

        if Desiru.respond_to?(:check_job_status)
          status = Desiru.check_job_status(job_id)

          if status
            json status
          else
            halt 404, json(error: 'Job not found')
          end
        else
          halt 501, json(error: 'Async job tracking not implemented')
        end
      end
    end
  end
end

#register_module(path, desiru_module, description: nil) ⇒ Object

Register a Desiru module with an endpoint path



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# File 'lib/desiru/api/sinatra_integration.rb', line 21

def register_module(path, desiru_module, description: nil)
  @modules[path] = {
    module: desiru_module,
    description: description || "Endpoint for #{desiru_module.class.name}"
  }
end

#to_rack_app ⇒ Object

Mount the API in a Rack application with CORS



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# File 'lib/desiru/api/sinatra_integration.rb', line 198

def to_rack_app
  api = generate_api

  Rack::Builder.new do
    use Rack::Cors do
      allow do
        origins '*'
        resource '*',
                 headers: :any,
                 methods: %i[get post put patch delete options head],
                 expose: ['Access-Control-Allow-Origin']
      end
    end

    run api
  end
end