module CreateCustomFieldJoin

	def self.create(supporter, profile_id, params)
		custom_field = supporter.custom_field_joins.create(params)
		return custom_field
	end

	# In the future, this should create an activity feed entry

	# @param [Array<Hash>] custom_fields Hash with following keys:
  #								* custom_field_master_id [Integer] for the key corresponding to custom_field_master_id
	#								* value [Object] the expected value of the field. If this key is an empty string, we remove the custom_field

	def self.modify(np, user, supporter_ids, custom_fields)
		return if supporter_ids.nil? || supporter_ids.empty?
		return if custom_fields.nil? || custom_fields.empty?
		supporter_ids.each do |sid|
			supporter = np.supporters.find(sid)
			custom_fields.each do |custom_field|
					existing = supporter.custom_field_joins.find_by_custom_field_master_id(custom_field[:custom_field_master_id])
					if existing
						existing.update_attributes({
							custom_field_master_id: custom_field[:custom_field_master_id],
							value: custom_field[:value]
						})
					else 
						self.create(supporter, user.profile.id, {
							custom_field_master_id: custom_field[:custom_field_master_id],
							value: custom_field[:value]
						})
					end
				end
			end
		return np
	end

end