photomix/app/models/photo.rb
2009-06-03 21:30:09 +02:00

142 lines
5.2 KiB
Ruby

require "image_science"
require 'mini_exiftool'
class Photo < ActiveRecord::Base
belongs_to :album
has_many :photo_tags, :dependent => :destroy
has_many :tags, :through => :photo_tags
validates_uniqueness_of :path, :message => "Photo already exsists on disc"
validates_presence_of :title
before_create :exif_read
after_create :create_thumbnails
before_update :exif_write # should only write if tags are changed as images can be large and thus ExifTool will take a while to write to the file
before_destroy :destroy_file
attr_accessor :tag_list
attr_protected :path
def self.untouched
self.find(:all, :conditions => "Photos.description IS NULL AND Photos.Id NOT IN ( SELECT Photo_ID FROM Photo_Tags)", :include => :album )
end
def path_original_public
return APP_CONFIG[:photos_path_public] + self.path
end
def path_modified_public(size)
return APP_CONFIG[:thumbs_path_public] + self.album.path + "/" + self.id.to_s + "_" + size + self.extension
end
def tag(title)
return if self.tags.collect{|tag|tag.title}.include?( title )
self.photo_tags.create(:tag => Tag.find_or_create_by_title( :title => title) )
self.reload
end
def untag(title)
return if !self.tags.collect{|tag|tag.title}.include?( title )
# perhaps not the best way but it finds the correct PhotoTag and deletes it
self.photo_tags.select{|photo_tag|
photo_tag.tag.title == title
}.each {|photo_tag|photo_tag.destroy}
self.reload
end
def tag_list
return self.tags.find(:all, :order => 'title').collect{ |t| t.title }.join(" ")
end
def tag_list=(tags)
ts = Array.new
tags.split(" ").each do |tag|
ts.push( Tag.find_or_create_by_title( :title => tag.downcase) )
end
self.tags = ts
end
def exif_info
photo = MiniExiftool.new(self.path_original)
photo.tags.sort.each do |tag|
puts tag.ljust(28) + photo[tag].to_s
end
end
# Map file extensions to mime types.
# Thanks to bug in Flash 8 the content type is always set to application/octet-stream.
# From: http://blog.airbladesoftware.com/2007/8/8/uploading-files-with-swfupload
def swf_uploaded_data=(data)
data.content_type = MIME::Types.type_for(data.original_filename)
self.title = data.original_filename
self.path = self.album.path + "/" + data.original_filename
File.open(APP_CONFIG[:photos_path] + self.path, "wb") { |f| f.write(data.read) }
end
protected
def extension
return File.extname(self.path_original)
end
def path_original
return APP_CONFIG[:photos_path] + self.path
end
def path_modified(size)
return APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_" + size + self.extension
end
private
def create_thumbnails
ImageScience.with_image(APP_CONFIG[:photos_path] + self.path) do |img|
#puts " thumbing it..thumbing it.."
ext = File.extname( APP_CONFIG[:photos_path] + self.path )
img.thumbnail(85) do |thumb|
thumb.save APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_thumb" + ext
end
img.thumbnail(150) do |thumb|
thumb.save APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_album" + ext
end
img.thumbnail(800) do |thumb|
thumb.save APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_large" + ext
end
end
end
def exif_read
photo = MiniExiftool.new(self.path_original)
self.longitude = photo.GPSLongitude if self.longitude.nil?
self.latitude = photo.GPSLatitude if self.latitude.nil?
self.title = photo.DocumentName if self.title.nil?
self.description = photo.ImageDescription if self.description.nil?
self.tag_list = (self.tags.empty? ? "" : self.album.tag_list) + " " + (photo.Keywords.map { |tag| tag.gsub(" ", "_") }.join(" ") if !photo.Keywords.nil?)
end
def exif_write
photo = MiniExiftool.new(self.path_original)
photo.GPSLongitude = self.longitude
photo.GPSLatitude = self.latitude
photo.DocumentName = self.title
photo.ImageDescription = self.description
photo.Keywords = self.tags
photo.save
end
def destroy_file
#puts "DELETE THUMBS OF " + APP_CONFIG[:photos_path] + self.path
File.delete( APP_CONFIG[:photos_path] + self.path ) if File.exists?( APP_CONFIG[:photos_path] + self.path )
File.delete( APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_thumb" + File.extname( APP_CONFIG[:photos_path] + self.path ) ) if File.exists?( APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_thumb" + File.extname( APP_CONFIG[:photos_path] + self.path ) )
File.delete( APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_album" + File.extname( APP_CONFIG[:photos_path] + self.path ) ) if File.exists?( APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_album" + File.extname( APP_CONFIG[:photos_path] + self.path ) )
File.delete( APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_large" + File.extname( APP_CONFIG[:photos_path] + self.path ) ) if File.exists?( APP_CONFIG[:thumbs_path] + self.album.path + "/" + self.id.to_s + "_large" + File.extname( APP_CONFIG[:photos_path] + self.path ) )
end
end