renamed pending post to upload

app/models/upload.rb

@@ -0,0 +1,210 @@
+require "danbooru_image_resizer/danbooru_image_resizer"
+require "tmpdir"
+
+class Upload < ActiveRecord::Base
+  attr_accessor :file, :image_width, :image_height, :file_ext, :md5, :file_size
+  belongs_to :uploader, :class_name => "User"
+  before_save :convert_cgi_file
+  
+  def process!
+    update_attribute(:status, "processing")
+    if is_downloadable?
+      download_from_source(temp_file_path)
+    end
+    self.file_ext = content_type_to_file_ext(content_type)
+    calculate_hash(file_path)
+    calculate_file_size(file_path)
+    calculate_dimensions(file_path) if has_dimensions?
+    generate_resizes(file_path)
+    move_file
+    post = convert_to_post
+    if post.save
+      update_attributes(:status => "finished", :post_id => post.id)
+    else
+      update_attribute(:status, "error: " + post.errors.full_messages.join(", "))
+    end
+  end
+
+  def convert_to_post
+    returning Post.new do |p|
+      p.tag_string = tag_string
+      p.md5 = md5
+      p.file_ext = file_ext
+      p.image_width = image_width
+      p.image_height = image_height
+      p.uploader_id = uploader_id
+      p.uploader_ip_addr = uploader_ip_addr
+      p.updater_id = uploader_id
+      p.updater_ip_addr = uploader_ip_addr
+      p.rating = rating
+      p.source = source
+      p.file_size = file_size      
+    end
+  end
+  
+  def move_file
+    FileUtils.mv(file_path, md5_file_path)
+  end
+  
+  def calculate_file_size(source_path)
+    self.file_size = File.size(source_path)
+  end
+  
+  # Calculates the MD5 based on whatever is in temp_file_path
+  def calculate_hash(source_path)
+    self.md5 = Digest::MD5.file(source_path).hexdigest
+  end
+
+  class Error < Exception ; end
+  
+  module ResizerMethods
+    def generate_resizes(source_path)
+      generate_resize_for(Danbooru.config.small_image_width, Danbooru.config.small_image_width, source_path)
+      generate_resize_for(Danbooru.config.medium_image_width, nil, source_path)
+      generate_resize_for(Danbooru.config.large_image_width, nil, source_path)
+    end
+
+    def generate_resize_for(width, height, source_path)
+      return if width.nil?
+      return unless image_width > width
+      return unless height.nil? || image_height > height
+
+      unless File.exists?(source_path)
+        raise Error.new("file not found")
+      end
+
+      size = Danbooru.reduce_to({:width => image_width, :height => image_height}, {:width => width, :height => height})
+
+      # If we're not reducing the resolution, only reencode if the source image larger than
+      # 200 kilobytes.
+      if size[:width] == image_width && size[:height] == image_height && File.size?(source_path) < 200.kilobytes
+        return
+      end
+
+      Danbooru.resize(file_ext, source_path, resized_file_path_for(width), size, 90)
+    end
+  end
+
+  module DimensionMethods
+    # Figures out the dimensions of the image.
+    def calculate_dimensions(file_path)
+      image_size = ImageSize.new(File.open(file_path, "rb"))
+      self.image_width = image_size.get_width
+      self.image_height = image_size.get_height
+    end
+
+    # Does this file have image dimensions?
+    def has_dimensions?
+      %w(jpg gif png swf).include?(file_ext)
+    end
+  end
+  
+  module ContentTypeMethods
+    def content_type_to_file_ext(content_type)
+      case content_type
+      when "image/jpeg"
+        "jpg"
+        
+      when "image/gif"
+        "gif"
+        
+      when "image/png"
+        "png"
+        
+      when "application/x-shockwave-flash"
+        "swf"
+        
+      else
+        "bin"
+      end
+    end
+    
+    # Converts a content type string to a file extension
+    def file_ext_to_content_type(file_ext)
+      case file_ext
+      when /\.jpeg$|\.jpg$/
+        "image/jpeg"
+
+      when /\.gif$/
+        "image/gif"
+
+      when /\.png$/
+        "image/png"
+
+      when /\.swf$/
+        "application/x-shockwave-flash"
+
+      else
+        "application/octet-stream"
+      end
+    end
+  end
+
+  module FilePathMethods
+    def md5_file_path
+      prefix = Rails.env == "test" ? "test." : ""
+      "#{Rails.root}/public/data/original/#{prefix}#{md5}.#{file_ext}"
+    end
+    
+    def resized_file_path_for(width)
+      prefix = Rails.env == "test" ? "test." : ""
+
+      case width
+      when Danbooru.config.small_image_width
+        "#{Rails.root}/public/data/thumb/#{prefix}#{md5}.jpg"
+
+      when Danbooru.config.medium_image_width
+        "#{Rails.root}/public/data/medium/#{prefix}#{md5}.jpg"
+
+      when Danbooru.config.large_image_width
+        "#{Rails.root}/public/data/large/#{prefix}#{md5}.jpg"
+      end
+    end
+    
+    def temp_file_path
+      File.join(Dir::tmpdir, "#{Time.now.to_f}.#{$PROCESS_ID}")
+    end
+  end
+  
+  module DownloaderMethods
+    # Determines whether the source is downloadable
+    def is_downloadable?
+      source =~ /^http:\/\// && file_path.blank?
+    end
+
+    # Downloads the file to destination_path
+    def download_from_source(destination_path)
+      download = Download.new(source, destination_path)
+      download.download!
+      self.file_path = destination_path
+      self.content_type = download.content_type || file_ext_to_content_type(source)
+      self.file_ext = content_type_to_file_ext(content_type)
+      self.source = download.source
+    end
+  end
+
+  module CgiFileMethods
+    def convert_cgi_file
+      return if file.blank? || file.size == 0
+
+      if file.local_path
+        self.file_path = file.local_path
+      else
+        self.file_path = temp_file_path
+        
+        File.open(file_path, 'wb') do |out| 
+          out.write(file.read)
+        end
+      end
+      self.content_type = file.content_type || file_ext_to_content_type(file.original_filename)
+      self.file_ext = content_type_to_file_ext(content_type)
+    end
+  end
+  
+  include ResizerMethods
+  include DimensionMethods
+  include ContentTypeMethods
+  include DownloaderMethods
+  include FilePathMethods
+  include CgiFileMethods
+end