Module: Picasa::Photo::ClassMethods

Defined in:
lib/picasa/photo.rb

Overview

Class methods to be added to the class that will include this module.

Instance Method Summary collapse

Instance Method Details

#belongs_to_picasa_album(params) ⇒ Object

Sets the user class configured so it can be used later.



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# File 'lib/picasa/photo.rb', line 14

def belongs_to_picasa_album params
  unless params[:class_name] and params[:class_name].class == String
    raise Exception, 'You should pass the string of the class name that includes Picasa::Album.'
  end
  
  define_dependent_class_methods :album_class, params[:class_name]
end

#picasa_find(user_id, album_id, photo_id, auth_token) ⇒ Object

Find a photo by user_id, album_id and photo_id If no album is found, then an exception is raised.



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# File 'lib/picasa/photo.rb', line 25

def picasa_find user_id, album_id, photo_id, auth_token
  resp, data = Picasa::HTTP::Photo.get_photo user_id, album_id, photo_id, auth_token
  
  if resp.code != "200" or resp.message != "OK"
    raise Exception, "Photo not found"
  end
  
  photo = new
  photo.send(:populate_attributes_from_xml, data)
  photo.album = album_class.picasa_find user_id, album_id, auth_token
  photo.file = Picasa::HTTP::Photo.download_image photo.media_content_url
  photo
end

#picasa_find_all(user_id, album_id, auth_token) ⇒ Object

Find all photos from an album using user_id, album_id If no album is found, then an exception is raised.



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# File 'lib/picasa/photo.rb', line 42

def picasa_find_all user_id, album_id, auth_token
  resp, data = Picasa::HTTP::Photo.get_photos user_id, album_id, auth_token
  
  if resp.code != "200" or resp.message != "OK"
    raise Exception, "Error while retrieving photos. Code: #{resp.code}, Message: #{resp.message}\n"+
      "#{user_id}, #{album_id}, #{auth_token}"
  end
  
  photos = []
  album = album_class.picasa_find user_id, album_id, auth_token
  doc = Nokogiri::XML(data)
  
  doc.xpath('//xmlns:entry').each do |entry|
    photo = new
    photo.send(:populate_attributes, entry)
    photo.album = album
    photos << photo
  end
  photos
end