Added missing file

lib/s_data.rb

@@ -0,0 +1,88 @@
+require 'active_support'
+require 'action_controller'
+require 'atom' # TODO: add ratom _dependency_
+
+module SData
+  class << self
+    def sdata_name(klass)
+      case klass
+      when SData::VirtualBase
+        klass.sdata_name
+      when Class
+        klass.respond_to?(:sdata_name) ? klass.sdata_name : nil
+      when String
+        klass.demodulize
+      end
+    end
+
+    def sdata_url_component(klass)
+      SData.sdata_name(klass).camelize(:lower)
+    end
+
+    def sdata_collection_url_component(klass)
+      SData.sdata_url_component(klass).pluralize
+    end
+
+    def config
+      unless @config
+        @config = YAML.load_file(File.join(File.dirname(__FILE__), '..', 'config','sdata.yml'))
+        app_config_file = ENV['SDATA_CONFIG_FILE']
+        app_config_file ||= File.join(RAILS_ROOT, 'config','sdata.yml') if defined?(RAILS_ROOT)
+        @config = @config.deep_merge(YAML.load_file(app_config_file)) unless app_config_file.nil?
+        @config = @config.with_indifferent_access
+        @config[:contracts] ||= []
+        @config[:defaultContract] ||= @config[:contracts].first
+        @config[:defaultContract] ||= "crmErp"
+        @config[:contract_namespace] ||= "SData::Contracts"        
+      end
+      @config
+    end
+
+    def config=(conf)
+      @config = conf.with_indifferent_access
+    end
+
+    def sdata_contract_name(klassname)
+      if (klassname =~ /#{@config[:contract_namespace]}::([^:]*)::/)
+        $~[1].camelize(:lower)
+      else
+        raise "Cannot determine sdata_contract_name for #{klassname}"
+      end
+    end
+
+
+    def contract_namespaces
+      config[:contracts].map{|contract| "#{config[:contract_namespace]}::#{contract.camelize}"}
+    end
+
+    # this is pby expensive and will have to be optimized by using const_get directly
+    # RADAR: this assumes resource names are unique across contracts. To change that must refactor sd_uuid to either
+    # have a contract attr or pby better just store fully qualified name in sd_class
+    def resource_class(klassname)
+      contract_namespaces.each do |ns|
+        begin
+          return "#{ns}::#{klassname}".constantize
+        rescue;end
+      end
+    end
+
+    def store_path
+      #TODO: remove dataset=nil and modify calls accordingly. dataset should not be implied at this level
+      ['sdata', config[:application], config[:defaultContract]].compact.join('/')
+    end
+
+    def base_url
+      config[:base_url].chomp('/')
+    end
+
+    def endpoint
+      [base_url, store_path].join('/')
+    end
+
+    def reset!
+      @config = nil
+    end
+
+
+  end
+end