Class: Awestruct::Extensions::Tagger

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# File 'lib/awestruct/extensions/tagger.rb', line 29

def initialize(tagged_items_property, input_path, output_path='tags', opts={})
  @tagged_items_property = tagged_items_property
  @input_path  = input_path
  @output_path = output_path
  @sanitize = opts[:sanitize] || false
  @pagination_opts = opts
end

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# File 'lib/awestruct/extensions/tagger.rb', line 37

def execute(site)
  @tags ||= {}
  all = site.send( @tagged_items_property )
  return if ( all.nil? || all.empty? ) 

  all.each do |page|
    tags = page.tags
    if ( tags && ! tags.empty? )
      tags.each do |tag|
        tag = tag.to_s
        @tags[tag] ||= TagStat.new( tag, [] )
        @tags[tag].pages << page
      end
    end
  end

  all.each do |page|
    page.tags = (page.tags||[]).collect{|t| @tags[t]}
    page.extend( TagLinker )
  end

  ordered_tags = @tags.values
  ordered_tags.sort!{|l,r| -(l.pages.size <=> r.pages.size)}
  #ordered_tags = ordered_tags[0,100]
  ordered_tags.sort!{|l,r| l.to_s <=> r.to_s}

  min = 9999
  max = 0

  ordered_tags.each do |tag|
    min = tag.pages.size if ( tag.pages.size < min )
    max = tag.pages.size if ( tag.pages.size > max )
  end

  span = max - min
  
  if span > 0
    slice = span / 6.0
    ordered_tags.each do |tag|
      adjusted_size = tag.pages.size - min
      scaled_size = adjusted_size / slice
      tag.group = (( tag.pages.size - min ) / slice).ceil
    end
  else
    ordered_tags.each do |tag|
      tag.group = 0
    end
  end

  @tags.values.each do |tag|
    ## Optionally sanitize tag URL
    output_prefix = File.join( @output_path, sanitize(tag.to_s) )
    options = { :remove_input=>false, :output_prefix=>output_prefix, :collection=>tag.pages }.merge( @pagination_opts )
    
    paginator = Awestruct::Extensions::Paginator.new( @tagged_items_property, @input_path, options )
    primary_page = paginator.execute( site )
    tag.primary_page = primary_page
  end

  site.send( "#{@tagged_items_property}_tags=", ordered_tags )
end