Module: Qrcodeable::Core

Extended by:
ActiveSupport::Concern
Defined in:
lib/qrcodeable/core.rb

Defined Under Namespace

Modules: ClassMethods Classes: QrcodeableError

Instance Method Summary collapse

Instance Method Details

#can_expire? ⇒ Boolean

Returns:

  • (Boolean) 


83
84
85
 
# File 'lib/qrcodeable/core.rb', line 83

def can_expire?
  self.expire_mode
end

#generate_qrcode ⇒ Object 



30
31
32
33
34
35
36
 
# File 'lib/qrcodeable/core.rb', line 30

def generate_qrcode
  begin
    return ::RQRCode::QRCode.new(instance_value_of(self.identifier).to_s, level: :h)
  rescue RuntimeError => e
    raise QrcodeableError.invalid_identifier(self.identifier)
  end
end

#print_qrcode ⇒ Object 



38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
 
# File 'lib/qrcodeable/core.rb', line 38

def print_qrcode
  begin
    qrcode = generate_qrcode
    png = qrcode.as_png(
              resize_gte_to: false,
              resize_exactly_to: false,
              fill: 'white',
              color: 'black',
              size: 512,
              border_modules: 0,
              module_px_size: 1,
              file: nil # path to write
              )
    path = qrcode_path
    File.open(path, 'wb') do |file|
      file.write(png.to_s)
    end
    return path
  rescue Errno::ENOENT => e
    raise QrcodeableError.no_directory(self.print_path)
  rescue RuntimeError => e
    raise QrcodeableError.invalid_identifier(self.identifier)
  end
end

#qrcode_expired? ⇒ Boolean

Returns:

  • (Boolean) 


71
72
73
74
75
76
77
78
79
80
81
 
# File 'lib/qrcodeable/core.rb', line 71

def qrcode_expired?
  if can_expire?
    if instance_value_of(self.expire_column)
      (Time.now > instance_value_of(self.expire_column))
    else
      false
    end 
  else
    false
  end
end

#qrcode_path ⇒ Object 



63
64
65
66
67
68
69
 
# File 'lib/qrcodeable/core.rb', line 63

def qrcode_path
  begin
    ::Rails.root.to_s+"/"+self.print_path+"/"+instance_value_of(self.identifier).to_s+".png"
  rescue RuntimeError => e
    raise QrcodeableError.invalid_identifier(self.identifier)
  end
end