grokify / ringcentral-sdk-ruby

require 'faraday'

require 'faraday_middleware'

require 'faraday_middleware/oauth2_refresh'

require 'oauth2'

module RingCentralSdk::REST

  class Client

    ACCESS_TOKEN_TTL  = 600             # 10 minutes

    REFRESH_TOKEN_TTL = 36000           # 10 hours

    REFRESH_TOKEN_TTL_REMEMBER = 604800 # 1 week

    ACCOUNT_PREFIX    = '/account/'

    ACCOUNT_ID        = '~'

    AUTHZ_ENDPOINT    = '/restapi/oauth/authorize'

    TOKEN_ENDPOINT    = '/restapi/oauth/token'

    REVOKE_ENDPOINT   = '/restapi/oauth/revoke'

    API_VERSION       = 'v1.0'

    URL_PREFIX        = '/restapi'

    DEFAULT_LANGUAGE  = 'en-us'

    attr_reader :app_config

    attr_reader :http

    attr_reader :oauth2client

    attr_reader :token

    attr_reader :user_agent

    attr_reader :messages

    attr_reader :instance_headers

    def initialize(app_key='', app_secret='', server_url=RingCentralSdk::RC_SERVER_SANDBOX, opts={})

      init_attributes()

      app_config = RingCentralSdk::REST::ConfigApp.new(app_key, app_secret, server_url, opts)

      app_config(app_config)

      if opts.key?(:username) && opts.key?(:password)

        extension = opts.key?(:extension) ? opts[:extension] : ''

        authorize_password(opts[:username], extension, opts[:password])

      end

      @instance_headers = opts[:headers] || {}

      @messages = RingCentralSdk::REST::Messages.new(self)

    end

    def app_config(app_config)

      @app_config = app_config

      @oauth2client = new_oauth2_client()

    end

    def init_attributes()

      @token = nil

      @http = nil

      @user_agent = get_user_agent()

    end

    def api_version_url()

      return @app_config.server_url + URL_PREFIX + '/' + API_VERSION 

    end

    def create_url(url, add_server=false, add_method=nil, add_token=false)

      built_url = ''

      has_http = !url.index('http://').nil? && !url.index('https://').nil?

      if add_server && ! has_http

        built_url += @app_config.server_url

      end

      if url.index(URL_PREFIX).nil? && ! has_http

        built_url += URL_PREFIX + '/' + API_VERSION + '/'

      end

      if url.index('/') == 0

        if built_url =~ /\/$/

          built_url += url.gsub(/^\//, '')

        else

          built_url += url

        end

      else # no /

        if built_url =~ /\/$/

          built_url += url

        else

          built_url += '/' + url

        end

      end

      return built_url

    end

    def create_urls(urls, add_server=false, add_method=nil, add_token=false)

      unless urls.is_a?(Array)

        raise "URLs is not an array"

      end

      built_urls = []

      urls.each do |url|

        built_urls.push(create_url(url, add_server, add_method, add_token))

      end

      return built_urls

    end

    def authorize_url(opts={})

      @oauth2client.auth_code.authorize_url(_add_redirect_uri(opts))

    end

    def authorize_code(code, opts={})

      token = @oauth2client.auth_code.get_token(code, _add_redirect_uri(opts))

      set_token(token)

      return token

    end

    def _add_redirect_uri(opts={})

      if !opts.key?(:redirect_uri) && @app_config.redirect_url.to_s.length > 0

        opts[:redirect_uri] = @app_config.redirect_url.to_s

      end

      return opts

    end

    def authorize_password(username, extension='', password='', remember=false)

      token = @oauth2client.password.get_token(username, password, {

        extension: extension,

        headers: { 'Authorization' => 'Basic ' + get_api_key() } })

      set_token(token)

      return token

    end

    def authorize_user(user, remember=false)

      authorize_password(user.username, user.extension, user.password)

    end

    def set_token(token)

      if token.is_a?(Hash)

        token = OAuth2::AccessToken::from_hash(@oauth2client, token)

      end

      unless token.is_a?(OAuth2::AccessToken)

        raise "Token is not a OAuth2::AccessToken"

      end

      @token = token

      @http = Faraday.new(url: api_version_url()) do |conn|

        conn.request :oauth2_refresh, @token

        conn.request :json

        conn.request :url_encoded

        conn.headers['User-Agent'] = @user_agent

        if @instance_headers.is_a? Hash 

          @instance_headers.each do |k,v|

            conn.headers[k] = v

          end

        end

        conn.headers['RC-User-Agent'] = @user_agent

        conn.headers['SDK-User-Agent'] = @user_agent

        conn.response :json, :content_type => /\bjson$/

        conn.adapter Faraday.default_adapter

      end

    end

    def new_oauth2_client()

      return OAuth2::Client.new(@app_config.key, @app_config.secret,

        site: @app_config.server_url,

        authorize_url: AUTHZ_ENDPOINT,

        token_url: TOKEN_ENDPOINT)

    end

    def set_oauth2_client(client=nil)

      if client.nil?

        @oauth2client = new_oauth2_client()

      elsif client.is_a?(OAuth2::Client)

        @oauth2client = client

      else

        fail "client is not an OAuth2::Client"

      end

    end

    def get_api_key()

      api_key = (@app_config.key.is_a?(String) && @app_config.secret.is_a?(String)) \

        ? Base64.encode64("#{@app_config.key}:#{@app_config.secret}").gsub(/[\s\t\r\n]/,'') : ''

      return api_key

    end

    def inflate_request(req_faraday, req_sdk)

      req_faraday.url req_sdk.url

      req_faraday.body = req_sdk.body if req_sdk.body

      if req_sdk.params.is_a? Hash 

        req_sdk.params.each { |k,v| req_faraday.params[k] = v }

      end

      if req_sdk.headers.is_a? Hash 

        req_sdk.headers.each { |k,v| req_faraday.headers[k] = v }

      end

      ct = req_sdk.content_type

      if !ct.nil? && ct.to_s.length > 0

        req_faraday.headers['Content-Type'] = ct.to_s

      end

      return req_faraday

    end

    def get_user_agent()

      ua = "ringcentral-sdk-ruby/#{RingCentralSdk::VERSION} %s/%s %s" % [

        (RUBY_ENGINE rescue nil or "ruby"),

        RUBY_VERSION,

        RUBY_PLATFORM

      ]

      return ua.strip

    end

    def create_subscription()

      return RingCentralSdk::REST::Subscription.new(self)

    end

    alias_method :authorize, :authorize_password

    alias_method :login, :authorize_password

    private :api_version_url

  end

end