photos.amdavidson.com/_plugins/index_galleries.rb

module Jekyll
    class GalleryIndex < Page
        def initialize(site, base, dir, galleries)
            @site = site
            @base = base
            @dir = dir
            @name = 'index.html'

            self.process(@name)
            self.read_yaml(File.join(base, '_layouts'), 'gallery-index.html')
            self.data['galleries'] = galleries
        end
    end
    class GalleryPage < Page
        def initialize(site, base, dir, gallery)
            @site = site
            @base = base
            @dir = dir
            @name = 'index.html'

            self.process(@name)
            self.read_yaml(File.join(base, "_layouts"), 'gallery-page.html')
            self.data['gallery'] = gallery 
        end
    end
    class GalleryPhoto < Page
        def initialize(site, base, dir, photo)
            @site = site
            @base = base
            @dir = dir
            @name = 'index.html'

            self.process(@name)
            self.read_yaml(File.join(base, "_layouts"), 'gallery-photo.html')
            self.data['photo'] = photo
        end
    end
    class GenerateGalleryIndex < Generator
        safe true

		def generate(site)
            gallery_index = Array.new()
			@galleries = site.pages.select { |page| 
                page.path =~ /^albums\/(.*)\.yaml$/ }
            @galleries_sorted = @galleries.sort_by { |g| g['gallery-date'] }
            @galleries_sorted.reverse.each { |gallery|
                index_record = Hash.new()
                index_record['title'] = gallery['gallery-title']
                index_record['slug'] = gallery['gallery-slug']
                index_record['key'] = gallery['gallery-key']
                index_record['date'] = gallery['gallery-date'].strftime("%Y-%m-%d")
                gallery_index.push(index_record) 
                gallery_page = index_record.clone
                gallery_page['images'] = gallery['images'].sort_by{|g| g['date']}
                site.pages << GalleryPage.new(site, site.source, 
                    "#{gallery['gallery-slug']}", 
                    gallery_page)

                gallery['images'].each_with_index { |image, i|
                    gallery_photo = index_record.clone
                    gallery_photo['image'] = image
                    site.pages << GalleryPhoto.new(site, site.source, 
                        "#{gallery['gallery-slug']}/#{image['basename']}", 
                        gallery_photo) 
                }
            }
            site.pages << GalleryIndex.new(site, site.source, 
                                           '', gallery_index)
        end 
	end
end