Module: Generator

Defined in:
lib/generator_pdf.rb

Class Method Summary collapse

Class Method Details

.insert_code_png(pdf, string, x, y) ⇒ Object 



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# File 'lib/generator_pdf.rb', line 13

def Generator.insert_code_png(pdf, string, x, y)
	barcode = Barby::Code128B.new(string)
	outputter = Barby::PngOutputter.new(barcode)
	outputter.height = 30
	outputter.margin = 0
	blob = outputter.to_svg #Raw PNG data
	data = StringIO.new(blob)
	pdf.image data, :at => [x, y], :width => 70, :height => 30

end

.insert_code_svg(pdf, string, x, y, width, height) ⇒ Object 



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# File 'lib/generator_pdf.rb', line 24

def Generator.insert_code_svg(pdf, string, x, y, width, height)
	barcode = Barby::Code128B.new(string)
	outputter = Barby::SvgOutputter.new(barcode)
	outputter.height = height
	outputter.margin = 0
	blob = outputter.to_svg #Raw PNG data
	data = StringIO.new(blob)
	pdf.bounding_box([x,y], :width => width, :height => height) do
		pdf.svg data, :vposition => :bottom, :position => :center
	end
end

.insert_qr_svg(pdf, string, x, y, width, height) ⇒ Object 



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# File 'lib/generator_pdf.rb', line 36

def Generator.insert_qr_svg(pdf, string, x, y, width, height)
	barcode = Barby::QrCode.new(string, size: 4)
	outputter = Barby::SvgOutputter.new(barcode)
	outputter.height = height
	outputter.margin = 0
	blob = outputter.to_svg #Raw PNG data
	# File.open('barcode.svg', 'wb'){|f| f.write blob }
	data = StringIO.new(blob)
	pdf.bounding_box([x,y], :width => width, :height => height) do
		pdf.svg data, :vposition => :bottom, :position => :center, :bottom_margin => 0.4.cm
		
	end
end

.render(template, data, output_filename) ⇒ Object 



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# File 'lib/generator_pdf.rb', line 50

def Generator.render(template, data, output_filename)
	validation = {
		font: String,
		size: Array,
		boxes: Array
	}
	box_validation = {
		position: Array,
		size: Array,
		align: String,
		font_size: Integer
	}
	# Do validation on template general shape
	template_shape_validation = template.valid_template?validation
	if template_shape_validation[:valid] then
		#If it is valid, the try to validate each defined box in the template
		template[:boxes].each_with_index{ |box,index|
				box_shape_validation = box.valid_template?box_validation
				if not box_shape_validation[:valid] then
					raise ArgumentError.new("#{box_shape_validation[:reason]} on box number #{index}")
				end
		}
	else
		raise raise ArgumentError.new(template_shape_validation[:reason])
	end
	# Check if the amount of data given fits the template
	if(template[:boxes].count != data.count) then
		raise ArgumentError.new("Data input should have the same lenght as available boxes. "\
		 			"Expecting #{template[:boxes].count} but #{data.count} given")
	end

	# From here template seems to be valid
	pdf = Prawn::Document.new(:page_size => template[:size], :margin => 0)
	pdf.font template[:font]
	template[:boxes].each_with_index do |box,index|
		value = data[index]
		if value.start_with?('text:', 'qr:', 'code128:', 'base64:') then
			if value.start_with?('text:') then
				pdf.text_box(
					value.sub('text:',''),
					:at => box[:position],
					:size => box[:font_size],
					:width => box[:size][0],
					:height=> box[:size][1],
					:overflow => :shrink_to_fit,
					:disable_wrap_by_char => true,
					:align => box[:align].to_sym
				)
			elsif value.start_with?('code128:') then
				insert_code_svg(
					pdf,
					(value.sub('code128:','')),
					box[:position][0],
					box[:position][1],
					box[:size][0],
					box[:size][1]
				)
			elsif value.start_with?('qr:') then
				insert_qr_svg(
					pdf,
					value.sub('qr:',''),
					box[:position][0],
					box[:position][1],
					box[:size][0],
					box[:size][1]
				)	
			end
		else
			pdf.text_box(
				value,
				:at => box[:position],
				:size => box[:font_size],
				:width => box[:size][0],
				:height=> box[:size][1],
				:overflow => :shrink_to_fit,
				:disable_wrap_by_char => true,
				:align => box[:align].to_sym
			)
		end
	end
	pdf.render_file output_filename
end

.render_bounds(template, output_filename) ⇒ Object 



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# File 'lib/generator_pdf.rb', line 133

def Generator.render_bounds(template, output_filename)
	validation = {
		font: String,
		size: Array,
		boxes: Array
	}
	box_validation = {
		position: Array,
		size: Array,
		align: String,
		font_size: Integer
	}
	# Do validation on template general shape
	template_shape_validation = template.valid_template?validation
	if template_shape_validation[:valid] then
		#If it is valid, the try to validate each defined box in the template
		template[:boxes].each_with_index{ |box,index|
				box_shape_validation = box.valid_template?box_validation
				if not box_shape_validation[:valid] then
					raise ArgumentError.new("#{box_shape_validation[:reason]} on box number #{index}")
				end
		}
	else
		raise raise ArgumentError.new(template_shape_validation[:reason])
	end

	# From here template seems to be valid
	pdf = Prawn::Document.new(:page_size => template[:size], :margin => 0)
	pdf.font template[:font]
	pdf.stroke_bounds
	template[:boxes].each do |box|
		pdf.bounding_box(box[:position], :width => box[:size][0], :height => box[:size][1]) do
			pdf.stroke_bounds
		end
	end
	pdf.render_file output_filename
end