Class: Image::UploadPdfToImagekit

Inherits:
BaseService show all
Defined in:
app/services/image/upload_pdf_to_imagekit.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseService

#log_debug, #log_error, #log_info, #log_warning, #logger, #options, #tagged_logger

Constructor Details

#initialize(options = {}) ⇒ UploadPdfToImagekit

Returns a new instance of UploadPdfToImagekit.



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# File 'app/services/image/upload_pdf_to_imagekit.rb', line 12

def initialize(options = {})
  super
end

Class Method Details

.migrate ⇒ Object 



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# File 'app/services/image/upload_pdf_to_imagekit.rb', line 2

def self.migrate
  iku = new
  uploads = Upload.joins(:item).includes(:item).where.not('items.id IS NULL').where(thumbnail_asset: nil)
  uploads.each do |u|
    next unless u.item

    iku.process(u)
  end
end

Instance Method Details

#process(upload, target_format: 'png') ⇒ Object 



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# File 'app/services/image/upload_pdf_to_imagekit.rb', line 16

def process(upload, target_format: 'png')
  return unless upload.is_pdf?
  return if upload.thumbnail_asset.present?

  puts "Processing upload #{upload.id}"

  orig_file_name = "upload_#{upload.id}.pdf"
  tn_file_name = if upload.item
                   "#{upload.item.sku.downcase}.#{target_format}"
                 else
                   "upload_#{upload.id}.#{target_format}"
                 end
  # gs_path = `which gs`.gsub("\n",'')
  Dir.mktmpdir do |dir|
    Dir.chdir(dir) do
      puts "temp directory #{dir} created"
      upload.attachment.to_file(orig_file_name)
      puts "Original pdf downloaded to #{dir}/#{orig_file_name}"
      # Extract
      cmd_format = case target_format.to_s
                   when 'jpg', 'jpeg'
                     '-sDEVICE=jpeg -r300 -dDownScaleFactor=2'
                   else
                     '-sDEVICE=png16m -r300 -dDownScaleFactor=2'
                   end
      cmd = %(gs -dBATCH -dNOPAUSE #{cmd_format} -dLastPage=1 -sOutputFile=#{tn_file_name} #{orig_file_name})
      puts "Executing command: #{cmd}"
      require 'open3'
      Open3.popen2e(cmd) do |_, stdout_and_stderr, wait_thr|
        puts stdout_and_stderr.read
        status = wait_thr.value
      end
      local_file_path = "#{dir}/#{tn_file_name}"
      if File.exist?(local_file_path)
        puts "Uploading #{local_file_path} to ik"
        File.open(local_file_path, 'rb') do |file|
          # Use ImageKitFactory helper method to upload file

          res = ImageKitFactory.upload_file(
            file: file,
            file_name: tn_file_name,
            use_unique_file_name: false,
            folder: 'pdf/'
          )
          upload.thumbnail_asset = res&.to_h&.deep_symbolize_keys
        rescue StandardError => e
          puts "Upload failed: #{e.message}"
        end
      else
        puts 'Error creating file'
      end
    end
  end
  upload.update_column(:thumbnail_asset, upload.thumbnail_asset) if upload.thumbnail_asset.present?
  upload.thumbnail_asset
end