Class: ImageSizeOptimizer

Inherits:
Object
  • Object
show all
Defined in:
lib/image_size_optimizer.rb

Class Method Summary collapse

Class Method Details

.convert_image(file_path, file_name, new_file_name, quality_counter) ⇒ Object 



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# File 'lib/image_size_optimizer.rb', line 44

def self.convert_image(file_path, file_name, new_file_name, quality_counter)
  `convert -quality "#{quality_counter}" "#{file_path}/#{file_name}" "#{file_path}/#{new_file_name}"`
end

.get_quality(file_path, file_name) ⇒ Object 



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# File 'lib/image_size_optimizer.rb', line 57

def self.get_quality(file_path, file_name)
  `identify -verbose "#{file_path}/#{file_name}" | grep 'Quality'`.split(':').last.split('KB').first.to_f
end

.get_size(file_path, file_name) ⇒ Object 



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# File 'lib/image_size_optimizer.rb', line 61

def self.get_size(file_path, file_name)
  a = `identify -verbose "#{file_path}/#{file_name}" | grep 'Filesize'`.split(':').last
  size = (a.include? 'MB')? (a.split('MB').first.to_f * 1024) : a.split('KB').first.to_f
end

.hi ⇒ Object 



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# File 'lib/image_size_optimizer.rb', line 3

def self.hi
  puts "Hello world!"
end

.process_image(s3_url, file_path = 'public', max_size, quality, bucket_name, quality_counter) ⇒ Object 



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# File 'lib/image_size_optimizer.rb', line 7

def self.process_image(s3_url, file_path = 'public', max_size, quality, bucket_name, quality_counter)
  quality_counter = quality_counter ? quality_counter.to_i : 90
  file_name = s3_url.split("/").last.split("?").first
  a = s3_url.split("#{bucket_name}/").last.split("/")
  a.pop
  bucket_path = a.join('/')
  new_file_name = file_name.split('.').first + '-high.' + file_name.split('.').last
  
  ImageSizeOptimizer.read_image(s3_url, file_path, file_name)
  original_qlity = ImageSizeOptimizer.get_quality(file_path, file_name)
  current_size = ImageSizeOptimizer.get_size(file_path, file_name)
  
  if original_qlity > quality
    while true do
      ImageSizeOptimizer.convert_image(file_path, file_name, new_file_name, quality_counter)
      current_size = ImageSizeOptimizer.get_size(file_path, new_file_name)
      unless current_size > max_size
        break
      else
        quality_counter = quality_counter - 1
      end
    end
    ImageSizeOptimizer.upload_to_s3(bucket_name, bucket_path, file_path, file_name, new_file_name, quality_counter)
    `rm -r "#{file_path}/#{file_name}"`
    `rm -r "#{file_path}/#{new_file_name}"`
  end
end

.read_image(s3_url, file_path, file_name) ⇒ Object 



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# File 'lib/image_size_optimizer.rb', line 49

def self.read_image(s3_url, file_path, file_name)
  data1 = open("#{s3_url}").read
  z = File.open("#{file_path}/#{file_name}", 'wb') do |f|
    f.write(data1)
    f.close
  end
end

.upload_to_s3(bucket_name, bucket_path, file_path, file_name, new_file_name, quality_counter) ⇒ Object 



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# File 'lib/image_size_optimizer.rb', line 35

def self.upload_to_s3(bucket_name, bucket_path, file_path, file_name, new_file_name, quality_counter)
  ImageSizeOptimizer.convert_image(file_path, file_name, new_file_name, quality_counter)
  s3 = AWS::S3.new
  key = File.basename(new_file_name)
  obj = s3.buckets[bucket_name].objects["#{bucket_path}/"+new_file_name]
  file = File.open(file_path+'/'+new_file_name, 'rb')
  obj.write(file)
end