lib/anyway/config.rb in anyway_config-2.1.0 vs lib/anyway/config.rb in anyway_config-2.2.0

@@ -42,10 +42,11 @@
       resolve_config_path
       tap
       to_h
       to_source_trace
       write_config_attr
+      __type_caster__
     ].freeze
 
     class Error < StandardError; end
 
     class ValidationError < Error; end
@@ -194,10 +195,51 @@
         end
       end
 
       def new_empty_config() = {}
 
+      def coerce_types(mapping)
+        coercion_mapping.deep_merge!(mapping)
+      end
+
+      def coercion_mapping
+        return @coercion_mapping if instance_variable_defined?(:@coercion_mapping)
+
+        @coercion_mapping = if superclass < Anyway::Config
+          superclass.coercion_mapping.deep_dup
+        else
+          {}
+        end
+      end
+
+      def type_caster(val = nil)
+        return @type_caster unless val.nil?
+
+        @type_caster ||=
+          if coercion_mapping.empty?
+            fallback_type_caster
+          else
+            ::Anyway::TypeCaster.new(coercion_mapping, fallback: fallback_type_caster)
+          end
+      end
+
+      def fallback_type_caster(val = nil)
+        return (@fallback_type_caster = val) unless val.nil?
+
+        return @fallback_type_caster if instance_variable_defined?(:@fallback_type_caster)
+
+        @fallback_type_caster = if superclass < Anyway::Config
+          superclass.fallback_type_caster.deep_dup
+        else
+          ::Anyway::AutoCast
+        end
+      end
+
+      def disable_auto_cast!
+        @fallback_type_caster = ::Anyway::NoCast
+      end
+
       private
 
       def define_config_accessor(*names)
         names.each do |name|
           accessors_module.module_eval <<~RUBY, __FILE__, __LINE__ + 1
@@ -371,21 +413,26 @@
     def validate_required_attributes!
       self.class.required_attributes.select do |name|
         values[name].nil? || (values[name].is_a?(String) && values[name].empty?)
       end.then do |missing|
         next if missing.empty?
-        raise_validation_error "The following config parameters are missing or empty: #{missing.join(", ")}"
+        raise_validation_error "The following config parameters for `#{self.class.name}(config_name: #{self.class.config_name})` are missing or empty: #{missing.join(", ")}"
       end
     end
 
     def write_config_attr(key, val)
       key = key.to_sym
       return unless self.class.config_attributes.include?(key)
 
+      val = __type_caster__.coerce(key, val)
       public_send(:"#{key}=", val)
     end
 
     def raise_validation_error(msg)
       raise ValidationError, msg
+    end
+
+    def __type_caster__
+      self.class.type_caster
     end
   end
 end