fhir.rb in fhir_models-1.8.3

- old
+ new

@@ -1,7 +1,8 @@
 require 'nokogiri'
 require 'logger'
+
 module FHIR
   def self.logger
     @logger || default_logger
   end
 
@@ -17,8 +18,65 @@
     doc = Nokogiri::XML(contents)
     if doc.errors.empty?
       FHIR::Xml.from_xml(contents)
     else
       FHIR::Json.from_json(contents)
+    end
+  end
+
+  # TODO: pull regexes from metadata
+  def self.primitive?(datatype:, value:)
+    # Remaining data types: handle special cases before checking type StructureDefinitions
+    case datatype.downcase
+    when 'boolean'
+      !(value.to_s =~ /\A(true|false)\Z/).nil?
+    when 'integer'
+      !(value.to_s =~ /\A(0|[-+]?[1-9][0-9]*)\Z/).nil?
+    when 'string', 'markdown'
+      value.is_a?(String)
+    when 'decimal'
+      !(value.to_s =~ /\A([-+]?([0]|([1-9][0-9]*))(\.[0-9]+)?)\Z/).nil?
+    when 'uri'
+      begin
+        !URI.parse(value).nil?
+      rescue
+        false
+      end
+    when 'base64binary'
+      # According to RFC-4648 base64binary encoding includes digits 0-9, a-z, A-Z, =, +, /, and whitespace
+      # an empty string is considered valid
+      # whitespace is not significant so we strip it out before doing the regex so that we can be sure that
+      # the number of characters is a multiple of 4.
+      # https://tools.ietf.org/html/rfc4648
+      !(value.to_s.gsub(/\s/, '') =~ %r{\A(|[0-9a-zA-Z\+=/]{4}+)\Z}).nil?
+    when 'instant'
+      formatted_value = value.respond_to?(:xmlschema) ? value.xmlschema : value.to_s
+      !(formatted_value =~ /\A([0-9]{4}(-(0[1-9]|1[0-2])(-(0[0-9]|[1-2][0-9]|3[0-1])(T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9](\.[0-9]+)?(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00))))))\Z/).nil?
+    when 'date'
+      !(value.to_s =~ /\A(-?[0-9]{4}(-(0[1-9]|1[0-2])(-(0[0-9]|[1-2][0-9]|3[0-1]))?)?)\Z/).nil?
+      # NOTE: we don't try to instantiate and verify  a Date because ruby does not natively suppport
+      # partial dates, which the FHIR standard allows.
+    when 'datetime'
+      !(value.to_s =~ /\A(-?[0-9]{4}(-(0[1-9]|1[0-2])(-(0[0-9]|[1-2][0-9]|3[0-1])(T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9](\.[0-9]+)?(Z|(\+|-)((0[0-9]|1[0-3]):[0-5][0-9]|14:00)))?)?)?)\Z/).nil?
+      # NOTE: we don't try to instantiate and verify a DateTime because ruby does not natively suppport
+      # partial dates, which the FHIR standard allows.
+    when 'time'
+      !(value.to_s =~ /\A(([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9](\.[0-9]+)?)\Z/).nil?
+    when 'code'
+      !(value.to_s =~ /\A[^\s]+([\s]?[^\s]+)*\Z/).nil?
+    when 'oid'
+      !(value.to_s =~ /\Aurn:oid:[0-2](\.[1-9]\d*)+\Z/).nil?
+    when 'id'
+      !(value.to_s =~ /\A[A-Za-z0-9\-\.]{1,64}\Z/).nil?
+    when 'xhtml'
+      fragment = Nokogiri::HTML::DocumentFragment.parse(value)
+      value.is_a?(String) && fragment.errors.size.zero?
+    when 'unsignedint'
+      !(value.to_s =~ /\A([0]|([1-9][0-9]*))\Z/).nil?
+    when 'positiveint'
+      !(value.to_s =~ /\A+?[1-9][0-9]*\Z/).nil?
+    else
+      FHIR.logger.warn "Unable to check #{value} for datatype #{datatype}"
+      false
     end
   end
 end