Class: FlickrFolder

Inherits:
Object
  • Object
show all
Defined in:
lib/flickr-folder.rb

Constant Summary collapse

DB_FILE_NAME = 
'.flickr-folder.db'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(config) ⇒ FlickrFolder

Returns a new instance of FlickrFolder.



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# File 'lib/flickr-folder.rb', line 14

def initialize(config)
  if !config or
    [:search, :folder, :config].any? {|either| config[either].nil?}
    raise ArgumentError, 'Configuration hash required with :search, :folder and :config parameters.'
  end
  @config = config
  @flickr = Flickr.new(@config[:config])
end

Instance Attribute Details

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/flickr-folder.rb', line 11

def config
  @config
end

#flickr ⇒ Object

Returns the value of attribute flickr.



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# File 'lib/flickr-folder.rb', line 12

def flickr
  @flickr
end

Instance Method Details

#photo_count ⇒ Object 



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# File 'lib/flickr-folder.rb', line 87

def photo_count
  photo_files.size
end

#photo_files ⇒ Object 



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# File 'lib/flickr-folder.rb', line 81

def photo_files
  Dir.new(@config[:folder][:path]).entries.reject do |file|
    file.eql? '.' or file.eql? '..' or file.eql? DB_FILE_NAME
  end
end

#purge_photos(count) ⇒ Object 



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# File 'lib/flickr-folder.rb', line 91

def purge_photos(count)
  photo_files.sort {|x,y|
      File.new(photo_path(x)).mtime <=>
      File.new(photo_path(y)).mtime
    }.slice(0, count).each do |file|
    FileUtils.rm(photo_path(file))
  end
end

#update ⇒ Object 



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# File 'lib/flickr-folder.rb', line 23

def update
  data_setup
  photos = []

  # Count existing photo files to figure out how many new ones are needed.
  return photos.size unless (files_needed_count = @config[:folder][:number] - photo_count) > 0

  page = 1
  while true do

    # Get a list of matching images from Flikr.
    (unfiltered_photos = (@flickr.photos.search @config[:search].merge({:page => page}))).each do |photo|
    
      # Filter results.
      next unless @config[:filter].nil? or @config[:filter].call(photo)
    
      # Skip known photos.
      cached_photos = @data[:photos]
      next if cached_photos.filter(:id => photo.id).count > 0
    
      puts "New photo: #{photo.id}, \"#{photo.title}\", max #{photo.sizes.last.width.to_s}px wide" if @config[:verbose]

      # Pick the first photo that's above the minimum size, if specified.  Otherwise grab the largest size.
      selected_size = photo.sizes.last
      minimum = @config[:folder][:minimum_resolution]
      next if minimum and
        photo.sizes.last.width.to_i < minimum and photo.sizes.last.height.to_i < minimum
      photo.sizes.each do |size|
        if size.width.to_i > minimum or size.height.to_i > minimum
          selected_size = size
          break
        end
      end if minimum

      puts "Downloading size: #{selected_size.width} x #{selected_size.height}" if @config[:verbose]
      url = URI.parse(selected_size.source)
      request = Net::HTTP::Get.new(url.path)
      response = Net::HTTP.start(url.host, url.port) do |http|
        http.request(request)
      end
      format = photo.original_format || (photo.sizes.first.source =~ /\.(\w+)$/; $1)
      open(File.join(@config[:folder][:path], "#{photo.id}.#{format}"), "wb") do |file|
          file.write(response.body)
      end

      photos << photo
      cached_photos.insert(:id => photo.id)      

      return photos.size if photos.size >= files_needed_count
      
    end

    page += 1
          
  end

end