Class: KMLAuthor

Inherits:
Object
  • Object
show all
Defined in:
lib/kml/kml_writer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filename) ⇒ KMLAuthor

Returns a new instance of KMLAuthor.



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# File 'lib/kml/kml_writer.rb', line 15

def initialize(filename)
  @filename = filename.dup #Getting weird frozen error...
  unless @filename =~ /\.kml$/
    @filename << '.kml'
  end
  @openfile = File.open(@filename, 'w')
end

Instance Attribute Details

#filename ⇒ Object (readonly)

Returns the value of attribute filename.



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# File 'lib/kml/kml_writer.rb', line 13

def filename
  @filename
end

#openfile ⇒ Object (readonly)

Returns the value of attribute openfile.



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# File 'lib/kml/kml_writer.rb', line 13

def openfile
  @openfile
end

Instance Method Details

#write_folder(folder) ⇒ Object

The main workhorse – a beautiful recursive function (if I may say so) to write folders to the document



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# File 'lib/kml/kml_writer.rb', line 31

def write_folder(folder)
  @openfile.write "<Folder>\n<name>#{folder[:name]}</name>\n"

  unless folder[:folders].nil?
    folder[:folders].each do |inner_folder|
      write_folder(inner_folder)
    end
  else
    unless folder[:features].empty?
      folder[:features].each do |feature|
        write_placemark(feature)
      end
    end
  end
  @openfile.write "</Folder>\n\n"
end

#write_footer ⇒ Object

Properly close the kml file



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# File 'lib/kml/kml_writer.rb', line 93

def write_footer
  @openfile.write("\n</Document>\n</kml>")
end

#write_header(title) ⇒ Object

Write the KML header information and give the the file a name



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# File 'lib/kml/kml_writer.rb', line 24

def write_header(title)
  @openfile.write "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
  @openfile.write "<kml xmlns=\"http://earth.google.com/kml/2.1\">\n"
  @openfile.write "<Document>\n<name>#{title}</name>\n\n"
end

#write_placemark(feature) ⇒ Object

Each placemark can be thought of as a feature in a geojson collection, there are many options, certainly not



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# File 'lib/kml/kml_writer.rb', line 49

def write_placemark(feature)
  @openfile.write "<Placemark>\n"
  unless feature[:name].nil?
    @openfile.write "\t<name>#{feature[:name]}</name>\n"
  end
  if feature.has_key? :style
    @openfile.write "\t<styleUrl>#{feature[:style]}</styleUrl>\n"
  end
  if feature.has_key? :extended
    @openfile.write "\t<ExtendedData>\n"
    feature[:extended].each do |k,v|
      @openfile.write "\t\t<Data name=\"#{k}\">#{v}</Data>\n"
    end
    @openfile.write "\t</ExtendedData>\n"
  end
  if feature.has_key? :desc
    if feature.has_key? :link
      @openfile.write "\t<description>\n\t\t#{feature[:desc]}\n<![CDATA[<img src=\"#{feature[:link]}\">]]></description>\n"
    else
    @openfile.write "\t<description>\n\t\t#{feature[:desc]}\n\t</description>\n"
    end
  end
  if feature.has_key? :time
    @openfile.write "\t<TimeStamp>\n"
    @openfile.write "\t\t<when>#{feature[:time].iso8601}</when>\n"
    @openfile.write "\t</TimeStamp>"
  end
  if feature.has_key? :gxTrack
    @openfile.write %Q{\t<gx:Track>
    \t\t<altitudeMode>absolute</altitudeMode>
    \t\t<when>#{feature[:gxTrack][:start][:time].iso8601}</when>
    \t\t<when>#{feature[:gxTrack][:end][:time].iso8601}</when>
    \t\t<gx:coord>#{feature[:gxTrack][:start][:pos]}</gx:coord>
    \t\t<gx:coord>#{feature[:gxTrack][:end][:pos]}</gx:coord>
    \t</gx:Track>}
  end

  unless feature[:geometry].nil?
    @openfile.write "\t"+feature[:geometry].as_kml #What type of geometry do we need here?
  end
  @openfile.write "</Placemark>\n\n"
end