ioquatix/utopia-gallery

# Copyright, 2012, by Samuel G. D. Williams. <http://www.codeotaku.com>
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

require_relative 'media'

require 'yaml'

module Utopia
    module Gallery
        class Container
            include Enumerable
            
            def initialize(root, path, filter: /(jpe?g|png)$/i)
                @root = root
                @path = path
                @filter = filter
            end
            
            attr :root
            attr :path
            attr :filter
            
            def each
                return to_enum unless block_given?
                
                gallery_metadata = load_metadata
                
                entries.each do |name|
                    path = File.join(@path, name)
                    media_metadata = gallery_metadata.delete(name)
                    
                    yield Media.new(path, media_metadata || {})
                end
            end
            
            private
            
            def full_path
                File.join(@root, @path)
            end
            
            def entries
                Dir.entries(full_path).select{|name| name =~ @filter}
            end
            
            def load_metadata
                metadata_path = File.join(full_path, 'gallery.yaml')
                
                if File.exist? metadata_path
                    return YAML::load(File.read(metadata_path))
                else
                    return {}
                end
            end
        end
    end
end