Class: Pdf::Compressor

Inherits:
BaseService show all
Defined in:
app/services/pdf/compressor.rb

Defined Under Namespace

Classes: Result

Constant Summary collapse

PDF_SETTINGS = 
%w[/screen /ebook /printer /prepress /default].freeze
COMPATIBILITY_LEVELS = 
%w[1.2 1.3 1.4 1.5 1.6 1.7].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from BaseService

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

Constructor Details

#initialize(input_path: nil, output_path: nil, input_blob: nil, output_blob: nil, compatibility_level: '1.4', pdf_setting: '/printer') ⇒ Compressor

Returns a new instance of Compressor.



13
14
15
16
17
18
19
20
 
# File 'app/services/pdf/compressor.rb', line 13

def initialize(input_path: nil, output_path: nil, input_blob: nil, output_blob: nil, compatibility_level: '1.4', pdf_setting: '/printer')
  @input_path = input_path ? Shellwords.escape(input_path) : nil
  @output_path = output_path ? Shellwords.escape(output_path) : input_path
  @input_blob = input_blob
  @output_blob = output_blob
  @compatibility_level = validate_compatibility(compatibility_level)
  @pdf_setting = validate_pdf_setting(pdf_setting)
end

Instance Attribute Details

#compatibility_level ⇒ Object (readonly)

Returns the value of attribute compatibility_level.



5
6
7
 
# File 'app/services/pdf/compressor.rb', line 5

def compatibility_level
  @compatibility_level
end

#input_blob ⇒ Object (readonly)

Returns the value of attribute input_blob.



5
6
7
 
# File 'app/services/pdf/compressor.rb', line 5

def input_blob
  @input_blob
end

#input_path ⇒ Object (readonly)

Returns the value of attribute input_path.



5
6
7
 
# File 'app/services/pdf/compressor.rb', line 5

def input_path
  @input_path
end

#output_blob ⇒ Object (readonly)

Returns the value of attribute output_blob.



5
6
7
 
# File 'app/services/pdf/compressor.rb', line 5

def output_blob
  @output_blob
end

#output_path ⇒ Object (readonly)

Returns the value of attribute output_path.



5
6
7
 
# File 'app/services/pdf/compressor.rb', line 5

def output_path
  @output_path
end

#pdf_setting ⇒ Object (readonly)

Returns the value of attribute pdf_setting.



5
6
7
 
# File 'app/services/pdf/compressor.rb', line 5

def pdf_setting
  @pdf_setting
end

Instance Method Details

#compress ⇒ Object 



22
23
24
25
26
27
28
29
30
31
32
33
 
# File 'app/services/pdf/compressor.rb', line 22

def compress
  unless gs_available?
    handle_missing_gs
    return Result.new(result: :skipped, message: 'Ghostscript not available, file copied or left unchanged', input_path:, output_path:)
  end

  if input_blob
    compress_blob
  else
    compress_file
  end
end