Initial commit

lib/bootstrap_form_extensions.rb

@@ -0,0 +1,95 @@
+module BootstrapFormExtensions
+  # Extend help text to allow translations to be specified under 'helpers.help'
+  def get_help_text_by_i18n_key(name)
+    return if object.nil?
+
+    HelpText.new(object, name).to_s
+  end
+
+  def required_attribute?(obj, attribute)
+    RequiredAttribute.new(obj, attribute, options[:validation_context]).required?
+  end
+
+	private
+
+	class RequiredAttribute
+		def initialize(obj, attribute, context)
+			@obj = obj
+			@attribute = attribute
+			@context = context
+		end
+
+		def required?
+			return false unless obj and attribute
+
+			presence_validator.present? && validates_in_context?
+    end
+
+    private
+
+    attr_reader :obj, :attribute, :context
+
+    def model_validation_context
+      if presence_validator
+        presence_validator.options[:on]
+      end
+    end
+
+    def presence_validator
+      target_validators.detect { |validator| validator.class.in? [ActiveModel::Validations::PresenceValidator, ActiveRecord::Validations::PresenceValidator] }
+    end
+
+    def target
+      (obj.class == Class) ? obj : obj.class
+    end
+
+    def target_validators
+      if target.respond_to? :validators_on
+        target.validators_on(attribute)
+      else
+        []
+      end
+    end
+
+    def validates_in_context?
+      (model_validation_context.blank? || model_validation_context == context)
+    end
+  end
+
+  class HelpText
+    attr_reader :object, :name
+
+    def initialize(object, name)
+      @object = object
+      @name = name
+    end
+
+    def to_s
+      namespaces.map { |namespace| help_text_for(namespace) }.compact.first
+    end
+
+    private
+
+    def help_text_for(namespace)
+      underscored_scope = "#{namespace}.#{partial_scope.underscore}"
+      downcased_scope = "#{namespace}.#{partial_scope.downcase}"
+
+      help_text = I18n.t(name, scope: underscored_scope, default: '').presence
+      help_text ||= if text = I18n.t(name, scope: downcased_scope, default: '').presence
+                      warn "I18n key '#{downcased_scope}.#{name}' is deprecated, use '#{underscored_scope}.#{name}' instead"
+                      text
+                    end
+
+      help_text
+    end
+
+    def partial_scope
+      # ActiveModel::Naming 3.X.X does not support .name; it is supported as of 4.X.X
+      @partial_scope ||= object.class.model_name.respond_to?(:name) ? object.class.model_name.name : object.class.model_name
+    end
+
+    def namespaces
+      %w(activerecord.help helpers.help)
+    end
+  end
+end