Merge pull request #38 from stevieing/add_code39_support

Add code39 support

.rubocop.yml

@@ -34,11 +34,6 @@ Style/NumericLiterals:
 Style/AsciiComments:
   Enabled: false
 
-# Blocks are used to structure tests and are part of the shoulda dsl.
-# The standard BlockLength limits are too stringent for this purpose.
-# Block DSL is also used in routes
-# We should be careful keeping rake tasks here, as large tasks are still an issue.
-# Not sure if we need to split namespaces across several files though.
 Metrics/BlockLength:
   Exclude:
     - 'test/**/*'

app/label_printer/label_printer/commands/barcode_format.rb

@@ -28,6 +28,7 @@ class BarcodeFormat < Commands::Base
       # qq: Number of zeros to be suppressed (optional, 00 - 20)
 
       # 2D:
+      # Barcode type: Q
       # Format: [ESC] XBaa; bbbb, cccc, d, ee, ff, gg, h [LF] [NUL]
       # Example: XB02;0300,0145,Q,20,03,05,1
       # aa: Bar code number (00 - 31)
@@ -41,6 +42,7 @@ class BarcodeFormat < Commands::Base
       # h: Rotational angle of bar code 0: 0° 1: 90° 2: 180° 3: 270°
 
       # PDF417
+      # Barcode type: P
       # Format: [ESC] XBaa; bbbb, cccc, d, ee, ff, gg, h, iiii [LF] [NUL]
       # Example: XB02,0300,0000,P,00,01,10,0,0100
       # aa: Bar code number (00 - 31)
@@ -53,26 +55,66 @@ class BarcodeFormat < Commands::Base
       # h: rotational angle of barcode (0 - 0, 1 - 90, 2 - 180, 3 - 270)
       # iiii: Bar height (0000 - 0100 in 0.1mm units)
 
+      # CODE39
+      # Barcode type: 3 or B
+      # [ESC] XBaa; bbbb, cccc, d, e, ff, gg, hh, ii, jj, k, llll [LF] [NUL]
+      # Example: XB02,0300,0000,3,3,01,01,01,01,01,1,0100
+      # aa: Bar code number (00 - 31)
+      # bbbb: Print origin of X-coordinate of bar code
+      # cccc: Print origin of Y-coordinate of bar code
+      # d: Type of bar code
+      # e: type of check digit
+      # ff: Narrow bar width (01 to 99 (in dots))
+      # gg: Narrow space width (01 to 99 (in dots))
+      # hh: Wide bar width (01 to 99 (in dots))
+      # ii: Wide space width (01 to 99 (in dots))
+      # jj: Character-to-character space width (01 to 99 (in dots))
+      # k: rotational angle of barcode (0 - 0, 1 - 90, 2 - 180, 3 - 270)
+      # llll: Height of the bar code (0000 - 0100 in 0.1mm units)
+
       prefix_accessor 'XB'
 
       optional_attributes barcode_type: '5', type_of_check_digit: '3',
                           one_module_width: '02', height: '0070',
                           one_cell_width: '04', rotational_angle: '1',
-                          no_of_columns: '01', bar_height: '0010'
+                          no_of_columns: '01', bar_height: '0010',
+                          narrow_bar_width: '01', narrow_space_width: '01',
+                          wide_bar_width: '01',
+                          wide_space_width: '01', char_to_char_space_width: '01'
 
+      # TODO: Modify method to stop rubocop errors.
       def control_codes
-        standard_codes = "#{x_origin},#{y_origin},#{barcode_type}"
-
-        case barcode_type
-        when 'Q'
-          "#{standard_codes},20,#{one_cell_width},05,#{rotational_angle}"
-        when 'P'
-          "#{standard_codes},00,#{one_module_width},#{no_of_columns},"\
-          "0,#{bar_height}"
-        else
-          "#{standard_codes},#{type_of_check_digit},#{one_module_width},"\
-          "0,#{height},+0000000000,002,0,00"
-        end
+        return twod_codes if barcode_type == 'Q'
+        return pdf417_codes if barcode_type == 'P'
+        return code39_codes if barcode_type == '3' || barcode_type == 'B'
+
+        oned_codes
+      end
+
+      private
+
+      def standard_codes
+        "#{x_origin},#{y_origin},#{barcode_type}"
+      end
+
+      def pdf417_codes
+        "#{standard_codes},00,#{one_module_width},#{no_of_columns},"\
+        "0,#{bar_height}"
+      end
+
+      def twod_codes
+        "#{standard_codes},20,#{one_cell_width},05,#{rotational_angle}"
+      end
+
+      def oned_codes
+        "#{standard_codes},#{type_of_check_digit},#{one_module_width},"\
+        "0,#{height},+0000000000,002,0,00"
+      end
+
+      def code39_codes
+        "#{standard_codes},#{type_of_check_digit},#{narrow_bar_width},#{narrow_space_width},"\
+        "#{wide_bar_width},#{wide_space_width},#{char_to_char_space_width},"\
+        "#{rotational_angle},#{height}"
       end
     end
   end

app/models/barcode.rb

@@ -7,11 +7,17 @@
 class Barcode < Drawing
   store :options, accessors: %i[barcode_type one_module_width
                                 height rotational_angle one_cell_width
-                                type_of_check_digit no_of_columns bar_height]
+                                type_of_check_digit no_of_columns bar_height
+                                narrow_bar_width narrow_space_width
+                                wide_bar_width wide_space_width
+                                char_to_char_space_width]
 
   validates :barcode_type, format: { with: /\A[0-9A-Z]{1}\z/, allow_blank: true }
 
   validates :one_module_width, :one_cell_width, :no_of_columns,
+            :narrow_bar_width, :narrow_space_width,
+            :wide_bar_width, :wide_space_width,
+            :char_to_char_space_width,
             format: { with: /\A\d{2}\z/, allow_blank: true }
 
   validates :rotational_angle, :type_of_check_digit,

spec/label_printer/commands_spec.rb

@@ -185,6 +185,22 @@
         expect(command.control_codes).to eq('0300,0000,P,00,01,10,0,0100')
       end
     end
+
+    context 'CODE39' do
+      let(:options) {{  id: '001', x_origin: '0300', y_origin: '0000',
+                        barcode_type: '3', type_of_check_digit: '3', narrow_bar_width: '02', 
+                        narrow_space_width: '03', wide_bar_width: '04',
+                        wide_space_width: '05', char_to_char_space_width: '06', 
+                        rotational_angle: '1', height: '0100' }}
+
+      it 'should have appropriate control codes' do
+        command = LabelPrinter::Commands::BarcodeFormat.new(options)
+        expect(command.control_codes).to eq('0300,0000,3,3,02,03,04,05,06,1,0100')
+        command = LabelPrinter::Commands::BarcodeFormat.new(options.merge(barcode_type: 'B'))
+        expect(command.control_codes).to eq('0300,0000,B,3,02,03,04,05,06,1,0100')
+      end
+
+    end
   end
 
   context 'Draw Barcode' do

spec/models/barcode_spec.rb

@@ -45,6 +45,36 @@
     expect(build(:barcode, bar_height: '11111')).to_not be_valid
   end
 
+  it 'should validate format of narrow bar width' do
+    expect(build(:barcode, narrow_bar_width: '01')).to be_valid
+    expect(build(:barcode, narrow_bar_width: 'XX')).to_not be_valid
+    expect(build(:barcode, narrow_bar_width: '111')).to_not be_valid
+  end
+
+  it 'should validate format of narrow space width' do
+    expect(build(:barcode, narrow_space_width: '01')).to be_valid
+    expect(build(:barcode, narrow_space_width: 'XX')).to_not be_valid
+    expect(build(:barcode, narrow_space_width: '111')).to_not be_valid
+  end
+
+  it 'should validate format of wide bar width' do
+    expect(build(:barcode, wide_bar_width: '01')).to be_valid
+    expect(build(:barcode, wide_bar_width: 'XX')).to_not be_valid
+    expect(build(:barcode, wide_bar_width: '111')).to_not be_valid
+  end
+
+  it 'should validate format of wide space width' do
+    expect(build(:barcode, wide_space_width: '01')).to be_valid
+    expect(build(:barcode, wide_space_width: 'XX')).to_not be_valid
+    expect(build(:barcode, wide_space_width: '111')).to_not be_valid
+  end
+
+  it 'should validate format of char to char space width' do
+    expect(build(:barcode, char_to_char_space_width: '01')).to be_valid
+    expect(build(:barcode, char_to_char_space_width: 'XX')).to_not be_valid
+    expect(build(:barcode, char_to_char_space_width: '111')).to_not be_valid
+  end
+
   it 'should assign a placeholder id if there is a section' do
     label = create(:label)