86 lines
2.0 KiB
Ruby
86 lines
2.0 KiB
Ruby
require "digest/sha1"
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class OptimizedImage < ActiveRecord::Base
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belongs_to :upload
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def self.create_for(upload, width, height)
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return unless width && height
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@image_sorcery_loaded ||= require "image_sorcery"
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original_path = "#{Rails.root}/public#{upload.url}"
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# create a temp file with the same extension as the original
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temp_file = Tempfile.new(["discourse", File.extname(original_path)])
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temp_path = temp_file.path
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if ImageSorcery.new(original_path).convert(temp_path, resize: "#{width}x#{height}")
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thumbnail = OptimizedImage.new({
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upload_id: upload.id,
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sha1: Digest::SHA1.file(temp_path).hexdigest,
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extension: File.extname(temp_path),
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width: width,
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height: height
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})
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# make sure the directory exists
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FileUtils.mkdir_p Pathname.new(thumbnail.path).dirname
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# move the temp file to the right location
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File.open(thumbnail.path, "wb") do |f|
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f.write temp_file.read
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end
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end
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# close && remove temp file
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temp_file.close
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temp_file.unlink
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thumbnail
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end
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def destroy
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OptimizedImage.transaction do
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remove_file
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super
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end
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end
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def remove_file
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File.delete path
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rescue Errno::ENOENT
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end
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def url
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"#{LocalStore.base_url}/#{optimized_path}/#{filename}"
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end
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def path
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"#{LocalStore.base_path}/#{optimized_path}/#{filename}"
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end
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def optimized_path
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"_optimized/#{sha1[0..2]}/#{sha1[3..5]}"
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end
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def filename
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"#{sha1[6..16]}_#{width}x#{height}#{extension}"
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end
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end
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# == Schema Information
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#
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# Table name: optimized_images
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#
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# id :integer not null, primary key
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# sha1 :string(40) not null
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# extension :string(10) not null
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# width :integer not null
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# height :integer not null
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# upload_id :integer not null
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#
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# Indexes
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#
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# index_optimized_images_on_upload_id (upload_id)
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# index_optimized_images_on_upload_id_and_width_and_height (upload_id,width,height) UNIQUE
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#
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