391 lines
10 KiB
Ruby
391 lines
10 KiB
Ruby
class Post < ActiveRecord::Base
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class Deletion < ActiveRecord::Base
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set_table_name "deleted_posts"
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end
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class Pending < ActiveRecord::Base
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set_table_name "pending_posts"
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def process!
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update_attribute(:status, "processing")
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move_file
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calculate_hash
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calculate_dimensions
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generate_resizes
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convert_to_post
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update_attribute(:status, "finished")
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end
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def move_file
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# Download the file
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# Move the tempfile into the data store
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# Distribute to other servers
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end
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def calculate_hash
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# Calculate the MD5 hash of the file
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end
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def calculate_dimensions
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# Calculate the dimensions of the image
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end
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def generate_resizes
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# Generate width=150
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# Generate width=1000
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#
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end
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def convert_to_post
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end
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private
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def download_from_source
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self.source = "" if source.nil?
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return if source !~ /^http:\/\// || !file_ext.blank?
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begin
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Danbooru.http_get_streaming(source) do |response|
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File.open(tempfile_path, "wb") do |out|
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response.read_body do |block|
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out.write(block)
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end
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end
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end
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if source.to_s =~ /\/src\/\d{12,}|urnc\.yi\.org|yui\.cynthia\.bne\.jp/
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self.source = "Image board"
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end
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return true
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rescue SocketError, URI::Error, SystemCallError => x
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delete_tempfile
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errors.add "source", "couldn't be opened: #{x}"
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return false
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end
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end
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def move_tempfile
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end
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def distribute_file
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end
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def generate_resize_for(width)
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end
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end
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class Version < ActiveRecord::Base
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set_table_name "post_versions"
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end
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module FileMethods
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def self.included(m)
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m.before_validation_on_create :download_source
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m.before_validation_on_create :validate_tempfile_exists
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m.before_validation_on_create :determine_content_type
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m.before_validation_on_create :validate_content_type
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m.before_validation_on_create :generate_hash
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m.before_validation_on_create :set_image_dimensions
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m.before_validation_on_create :generate_sample
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m.before_validation_on_create :generate_preview
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m.before_validation_on_create :move_file
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end
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def validate_tempfile_exists
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unless File.exists?(tempfile_path)
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errors.add :file, "not found, try uploading again"
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return false
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end
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end
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def validate_content_type
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unless %w(jpg png gif swf).include?(file_ext.downcase)
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errors.add(:file, "is an invalid content type: " + file_ext.downcase)
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return false
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end
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end
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def file_name
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md5 + "." + file_ext
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end
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def delete_tempfile
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FileUtils.rm_f(tempfile_path)
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FileUtils.rm_f(tempfile_preview_path)
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FileUtils.rm_f(tempfile_sample_path)
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end
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def tempfile_path
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"#{RAILS_ROOT}/public/data/#{$PROCESS_ID}.upload"
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end
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def tempfile_preview_path
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"#{RAILS_ROOT}/public/data/#{$PROCESS_ID}-preview.jpg"
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end
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# def file_size
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# File.size(file_path) rescue 0
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# end
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# Generate an MD5 hash for the file.
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def generate_hash
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unless File.exists?(tempfile_path)
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errors.add(:file, "not found")
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return false
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end
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self.md5 = File.open(tempfile_path, 'rb') {|fp| Digest::MD5.hexdigest(fp.read)}
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self.file_size = File.size(tempfile_path)
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if Post.exists?(["md5 = ?", md5])
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delete_tempfile
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errors.add "md5", "already exists"
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return false
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else
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return true
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end
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end
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def generate_preview
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return true unless image? && width && height
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unless File.exists?(tempfile_path)
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errors.add(:file, "not found")
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return false
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end
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size = Danbooru.reduce_to({:width=>width, :height=>height}, {:width=>150, :height=>150})
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# Generate the preview from the new sample if we have one to save CPU, otherwise from the image.
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if File.exists?(tempfile_sample_path)
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path, ext = tempfile_sample_path, "jpg"
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else
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path, ext = tempfile_path, file_ext
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end
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begin
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Danbooru.resize(ext, path, tempfile_preview_path, size, 95)
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rescue Exception => x
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errors.add "preview", "couldn't be generated (#{x})"
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return false
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end
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return true
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end
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# Automatically download from the source if it's a URL.
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def download_source
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self.source = "" if source.nil?
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return if source !~ /^http:\/\// || !file_ext.blank?
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begin
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Danbooru.http_get_streaming(source) do |response|
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File.open(tempfile_path, "wb") do |out|
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response.read_body do |block|
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out.write(block)
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end
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end
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end
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if source.to_s =~ /\/src\/\d{12,}|urnc\.yi\.org|yui\.cynthia\.bne\.jp/
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self.source = "Image board"
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end
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return true
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rescue SocketError, URI::Error, SystemCallError => x
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delete_tempfile
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errors.add "source", "couldn't be opened: #{x}"
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return false
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end
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end
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def determine_content_type
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imgsize = ImageSize.new(File.open(tempfile_path, "rb"))
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unless imgsize.get_width.nil?
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self.file_ext = imgsize.get_type.gsub(/JPEG/, "JPG").downcase
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end
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end
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# Assigns a CGI file to the post. This writes the file to disk and generates a unique file name.
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def file=(f)
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return if f.nil? || f.size == 0
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self.file_ext = content_type_to_file_ext(f.content_type) || find_ext(f.original_filename)
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if f.local_path
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# Large files are stored in the temp directory, so instead of
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# reading/rewriting through Ruby, just rely on system calls to
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# copy the file to danbooru's directory.
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FileUtils.cp(f.local_path, tempfile_path)
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else
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File.open(tempfile_path, 'wb') {|nf| nf.write(f.read)}
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end
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end
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def set_image_dimensions
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if image? or flash?
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imgsize = ImageSize.new(File.open(tempfile_path, "rb"))
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self.width = imgsize.get_width
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self.height = imgsize.get_height
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end
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end
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# Returns true if the post is an image format that GD can handle.
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def image?
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%w(jpg jpeg gif png).include?(file_ext.downcase)
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end
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# Returns true if the post is a Flash movie.
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def flash?
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file_ext == "swf"
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end
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def find_ext(file_path)
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ext = File.extname(file_path)
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if ext.blank?
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return "txt"
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else
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ext = ext[1..-1].downcase
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ext = "jpg" if ext == "jpeg"
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return ext
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end
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end
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def content_type_to_file_ext(content_type)
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case content_type.chomp
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when "image/jpeg"
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return "jpg"
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when "image/gif"
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return "gif"
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when "image/png"
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return "png"
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when "application/x-shockwave-flash"
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return "swf"
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else
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nil
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end
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end
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def preview_dimensions
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if image?
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dim = Danbooru.reduce_to({:width => width, :height => height}, {:width => 150, :height => 150})
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return [dim[:width], dim[:height]]
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else
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return [150, 150]
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end
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end
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def tempfile_sample_path
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"#{RAILS_ROOT}/public/data/#{$PROCESS_ID}-sample.jpg"
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end
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def regenerate_sample
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return false unless image?
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if generate_sample && File.exists?(tempfile_sample_path)
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FileUtils.mkdir_p(File.dirname(sample_path), :mode => 0775)
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FileUtils.mv(tempfile_sample_path, sample_path)
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FileUtils.chmod(0775, sample_path)
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puts "Fixed sample for #{id}"
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return true
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else
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puts "Error generating sample for #{id}"
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return false
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end
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end
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def generate_sample
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return true unless image?
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return true unless CONFIG["image_samples"]
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return true unless (width && height)
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return true if (file_ext.downcase == "gif")
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size = Danbooru.reduce_to({:width => width, :height => height}, {:width => CONFIG["sample_width"], :height => CONFIG["sample_height"]}, CONFIG["sample_ratio"])
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# We can generate the sample image during upload or offline. Use tempfile_path
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# if it exists, otherwise use file_path.
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path = tempfile_path
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path = file_path unless File.exists?(path)
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unless File.exists?(path)
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errors.add(:file, "not found")
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return false
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end
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# If we're not reducing the resolution for the sample image, only reencode if the
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# source image is above the reencode threshold. Anything smaller won't be reduced
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# enough by the reencode to bother, so don't reencode it and save disk space.
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if size[:width] == width && size[:height] == height && File.size?(path) < CONFIG["sample_always_generate_size"]
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return true
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end
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# If we already have a sample image, and the parameters havn't changed,
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# don't regenerate it.
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if size[:width] == sample_width && size[:height] == sample_height
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return true
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end
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size = Danbooru.reduce_to({:width => width, :height => height}, {:width => CONFIG["sample_width"], :height => CONFIG["sample_height"]})
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begin
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Danbooru.resize(file_ext, path, tempfile_sample_path, size, 90)
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rescue Exception => x
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errors.add "sample", "couldn't be created: #{x}"
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return false
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end
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self.sample_width = size[:width]
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self.sample_height = size[:height]
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return true
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end
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# Returns true if the post has a sample image.
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def has_sample?
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sample_width.is_a?(Integer)
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end
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# Returns true if the post has a sample image, and we're going to use it.
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def use_sample?(user = nil)
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if user && !user.show_samples?
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false
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else
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CONFIG["image_samples"] && has_sample?
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end
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end
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def sample_url(user = nil)
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if use_sample?(user)
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store_sample_url
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else
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file_url
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end
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end
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def get_sample_width(user = nil)
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if use_sample?(user)
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sample_width
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else
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width
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end
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end
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def get_sample_height(user = nil)
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if use_sample?(user)
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sample_height
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else
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height
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end
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end
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def sample_percentage
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100 * get_sample_width.to_f / width
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end
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end
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end
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