photomix/app/models/album.rb

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class Album < ActiveRecord::Base
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has_many :photos, :dependent => :destroy
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has_many :collection_albums
has_many :collections, :through => :collection_albums
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validates_uniqueness_of :path, :message => "Album already exsists on disc"
validates_presence_of :title, :message => "can't be blank"
before_validation :ensure_path, :set_title
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after_create :create_folders
after_destroy :destroy_folders
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attr_accessor :tags
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#attr_protected :path
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named_scope :untouched, :conditions => "albums.id IN ( SELECT DISTINCT photos.album_id FROM photos WHERE photos.description IS NULL AND photos.id NOT IN ( SELECT photo_id FROM photo_tags) )", :order => 'title'
named_scope :unused, :conditions => "albums.id NOT IN (SELECT album_id FROM collection_albums)"
named_scope :used, :conditions => "albums.id IN (SELECT album_id FROM collection_albums)"
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def to_param
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"#{id}-#{title.parameterize}"
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end
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def ensure_path
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self.path = self.title.parameterize unless self.path
end
def set_title
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self.title = File.basename( self.path).titleize unless self.title || !self.path
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end
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def tags
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# should maybe cache this to database?
# should maybe return array instead?
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tags = Array.new
self.photos.map{ |photo|
if photo.tags.empty?
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# photo has no tags => no unversial tags for this album
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return
else
photo.tags
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end
}.each_with_index{ |photo_tags,i|
# returns tag collection for each photo
if i == 0
tags = photo_tags
else
# combine arrays if they have identical tags.
# Will remove tags that are only tagged to one photo
#tags = tags & photo_tags
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tags = tags & photo_tags
end
}
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return tags
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end
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def tags=(tags)
tags = tags.split(" ").sort
current_tags = ( self.tags.nil? ? [] : self.tags.map{|tag|tag.title} )
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return if tags == self.tags
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# find tags that should be removed from this album - thus remove from all photos in album
# i.e. tags listed in self.tag_list but no in parameter tags
#current_tags.map {|tag|tag if !tags.include?(tag) }.compact
(current_tags - tags).each { |tag|
self.photos.each {|photo|
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photo.untag( tag )
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}
}
# add universial tags to all photos in album
(tags - current_tags).each do |tag|
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self.photos.each { |photo|
photo.tag( tag )
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}
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end
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end
def photo_tags
tags = Array.new
self.photos.each{ |photo|
tags = tags | photo.tags
}
return tags
end
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protected
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private
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def create_folders
Dir.mkdir( APP_CONFIG[:photos_path] + self.path ) unless File.exists?( APP_CONFIG[:photos_path] + self.path )
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Dir.mkdir( APP_CONFIG[:thumbs_path] + self.path ) unless File.exists?( APP_CONFIG[:thumbs_path] + self.path )
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end
def destroy_folders
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#puts "DELETE DIRECTORY " + APP_CONFIG[:photos_path] + self.path
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Dir.delete( APP_CONFIG[:photos_path] + self.path ) if File.exists?( APP_CONFIG[:photos_path] + self.path )
Dir.delete( APP_CONFIG[:thumbs_path] + self.path ) if File.exists?( APP_CONFIG[:thumbs_path] + self.path )
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end
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end