base_io.rb in eco-helpers-2.0.22

- old
+ new

@@ -3,10 +3,23 @@
     class UseCases
       # Basic class to manage InputOuput for usecases
       class BaseIO < BaseCase
         @types  = BaseCase.types
 
+        class MissingParameter < StandardError
+          attr_reader :type, :required, :given
+
+          def initialize(msg = nil, type: nil, required:, given:)
+            @type     = type
+            @required = required
+            @given    = given
+            msg += " of type '#{type}'" if type
+            msg += " requires an object '#{required}'. Given: #{given}."
+            super(msg)
+          end
+        end
+
         class << self
           def input_required?(type)
             !valid_type?(type) || [:import, :sync].include?(type)
           end
 
@@ -78,16 +91,16 @@
         private
 
         def validate_args(input:, people:, session:, options:)
           case
           when !session.is_a?(Eco::API::Session)
-            raise "A UseCase needs a Session object. Given: #{session}"
+            raise MissingParameter.new("UseCase", required: :session, given: session.class)
           when input_required? && !input
-            raise "UseCase of type '#{type}' requires a valid input. None given"
+            raise MissingParameter.new("UseCase", type: type, required: :input, given: input.class)
           when people_required? && !people.is_a?(Eco::API::Organization::People)
-            raise "UseCase of type '#{type}' requires a People object. Given: #{people}"
+            raise MissingParameter.new("UseCase", type: type, required: :people, given: people.class)
           when !options || (options && !options.is_a?(Hash))
-            raise "To inject dependencies via ':options' it should be a Hash object. Given: #{options}"
+            raise MissingParameter.new("Use Case options", required: :Hash, given: options.class)
           end
           true
         end
 
         def input_required?