# GML Polygon
# 19115-2 writer output in XML

# History:
#   Stan Smith 2016-12-05 refactored for mdTranslator/mdJson 2.0
#   Stan Smith 2015-07-16 moved module_coordinates from mdJson reader to internal
#   Stan Smith 2015-07-14 refactored to eliminate namespace globals $WriterNS and $IsoNS
#   Stan Smith 2015-07-14 refactored to make iso19110 independent of iso19115_2 classes
#   Stan Smith 2015-06-22 replace global ($response) with passed in object (hResponseObj)
#   Stan Smith 2014-12-12 refactored to handle namespacing readers and writers
#   Stan Smith 2014-07-08 modify require statements to function in RubyGem structure
#   Stan Smith 2014-05-30 modified for version 0.5.0
# 	Stan Smith 2013-11-18 original script.

require 'adiwg/mdtranslator/internal/module_coordinates'
require_relative 'class_featureProperties'

module ADIWG
    module Mdtranslator
        module Writers
            module Iso19115_2

                class Polygon

                    def initialize(xml, hResponseObj)
                        @xml = xml
                        @hResponseObj = hResponseObj
                    end

                    def writeXML(hGeoObject, hProperties, objId)

                        # classes used
                        geoPropClass = FeatureProperties.new(@xml, @hResponseObj)

                        # polygon attributes
                        attributes = {}

                        # polygon attributes - gml:id (required)
                        if objId.nil?
                            @hResponseObj[:writerMissingIdCount] = @hResponseObj[:writerMissingIdCount].succ
                            objId = 'polygon' + @hResponseObj[:writerMissingIdCount]
                        end
                        attributes['gml:id'] = objId

                        # polygon attributes - srsDimension
                        s = AdiwgCoordinates.getDimension(hGeoObject[:coordinates])
                        if !s.nil?
                            attributes[:srsDimension] = s
                        end

                        # polygon attributes - srsName (GeoJSON is WGS84)
                        attributes[:srsName] = 'WGS84'

                        @xml.tag!('gml:Polygon', attributes) do

                            # polygon - properties for Feature
                            unless hProperties.empty?
                                geoPropClass.writeXML(hProperties)
                            end
                            if hProperties.empty? && @hResponseObj[:writerShowTags]
                                @xml.tag!('gml:description')
                                @xml.tag!('gml:identifier', {'codeSpace'=>''})
                                @xml.tag!('gml:name')
                            end

                            aPolygons = hGeoObject[:coordinates]
                            aExterior = aPolygons[0]
                            aInterior = aPolygons.drop(1)

                            # polygon - exterior ring (required)
                            unless aExterior.nil?
                                @xml.tag!('gml:exterior') do
                                    @xml.tag!('gml:LinearRing') do
                                        aExterior.each do |aCoord|
                                            s = aCoord[0].to_s + ' ' + aCoord[1].to_s
                                            @xml.tag!('gml:pos', s)
                                        end
                                    end
                                end
                            end

                            # polygon - interior rings
                            aInterior.each do |aRing|
                                @xml.tag!('gml:interior') do
                                    @xml.tag!('gml:LinearRing') do
                                        aRing.each do |aCoord|
                                            s = aCoord[0].to_s + ' ' + aCoord[1].to_s
                                            @xml.tag!('gml:pos', s)
                                        end
                                    end
                                end
                            end

                        end # gml:Polygon tag
                    end # writeXML
                end # Polygon class

            end
        end
    end
end