# All files in the 'lib' directory will be loaded
# before nanoc starts compiling.

# module Tags
    def tags
        if @item[:tags].nil?
            return ''
        end
        @item[:tags].join(', ')
    end
   
    def alltags
        language=@item.path
        language =~ %r{/Scratch/([^/]*)/}
        language = $1
        @items.select {|p| p.path =~ %r{/Scratch/#{language}/}}
    end

    def tagNumber
        tags={}
        alltags.each do |p|
            if p[:tags].nil?
                next
            end
            p[:tags].each do |t|
                if tags[t]
                    tags[t]+=1
                else
                    tags[t]=1
                end
            end
        end
        return tags
    end
    
    def tagRefs
        tagLinks={}
        alltags.each do |p|
            if p[:tags].nil?
                next
            end
            p[:tags].each do |t|
                if tagLinks[t].nil?
                    tagLinks[t]=[ p ]
                else
                    tagLinks[t] <<= p
                end
            end
        end
        return tagLinks
    end
    
    def tagCloud
        tags=tagNumber
        tagLinks=tagRefs
        max=tags.values.max
        min=tags.values.min
        minSize=1.0
        maxSize=2.5
        tagSize={}
        tags.each do |t,n|
            # valeur normalisée entre 0 et 1
            if ( max == min )
                tagSize[t]=minSize
            else
                tagSize[t]=[ ( n - min + 0.0 ) / ( max - min ) , (n - min) / 10.0 ].min
                # valeur adaptée entre minSize et maxSize
                tagSize[t]=( tagSize[t] ) * (maxSize - minSize) + minSize
            end
        end
        tagCloud=%{<script type="text/javascript">
            $(document).ready( function(){$('.list').hide();} );
            function tagSelected(id) {
                $('.list').hide();
                $('#'+id).fadeIn();
                $('.tag.selected').removeClass('selected');
                $('#tag_'+id).addClass('selected');
            }
        </script><div id="tagcloud">}
        tagSize.sort{|a,b| a[0].downcase <=> b[0].downcase}.each do |t,s|
            protected=t.gsub(/\W/,'_')
            grouped=t.gsub(/&/,'&amp;').gsub(/ /,'&nbsp;').gsub(/</,'&lt;').gsub(/>/,'&gt;')
            tagCloud <<= %{<span style="font-size: #{s}em;" class="tag" onclick="tagSelected('#{protected}')" id="tag_#{protected}">#{grouped}</span> }
        end
        tagCloud <<= %{</div><div id="hiddenDivs" >}
        tagLinks.sort{|a,b| a[0].downcase <=> b[0].downcase}.each do |t,l|
            protected=t.gsub(/\W/,'_')
            tagCloud <<= %{<div id="#{protected}" class="list"><h4>#{t}</h4><ul>}
            l.each do |p|
                tagCloud <<= %{<li><a href="#{p.path}">#{p[:title]}</a></li>}
            end
            tagCloud <<= %{</ul></div>}
        end
        tagCloud <<= %{</div>}
        return tagCloud
    end
# end