demarches-normaliennes/app/views/administrateurs/attestation_templates/show.pdf.prawn

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require 'prawn/measurement_extensions'
#----- A4 page size
page_size = 'A4'
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# page_height = 842
page_width = 595
#----- margins
body_width = 400
top_margin = 50
bottom_margin = 20
footer_height = top_margin - bottom_margin
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right_margin = (page_width - body_width) / 2
left_margin = right_margin
#----- size of images
max_logo_width = body_width
max_logo_height = 50.mm
max_signature_size = 50.mm
def normalize_pdf_text(text)
text&.tr("\t", ' ')
end
title = normalize_pdf_text(@attestation.fetch(:title))
body = normalize_pdf_text(@attestation.fetch(:body))
footer = normalize_pdf_text(@attestation.fetch(:footer))
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created_at = @attestation.fetch(:created_at)
logo = @attestation[:logo]
signature = @attestation[:signature]
prawn_document(margin: [top_margin, right_margin, bottom_margin, left_margin], page_size: page_size) do |pdf|
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pdf.font_families.update('marianne' => { normal: Rails.root.join('lib/prawn/fonts/marianne/marianne-regular.ttf') })
pdf.font 'marianne'
grey = '555555'
black = '333333'
body_height = pdf.cursor - footer_height
pdf.bounding_box([0, pdf.cursor], width: body_width, height: body_height) do
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if logo.present?
logo_content = if logo.is_a?(ActiveStorage::Attached::One)
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logo.download
else
logo.rewind && logo.read
end
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pdf.image StringIO.new(logo_content), fit: [max_logo_width, max_logo_height], position: :center
end
pdf.fill_color grey
pdf.pad_top(40) { pdf.text "le #{l(created_at, format: '%e %B %Y')}", size: 9, align: :right, character_spacing: -0.5 }
pdf.fill_color black
pdf.pad_top(40) { pdf.text title, size: 14, character_spacing: -0.2 }
pdf.fill_color grey
pdf.pad_top(30) { pdf.text body, size: 9, character_spacing: -0.2, align: :justify }
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if signature.present?
pdf.pad_top(40) do
signature_content = if signature.is_a?(ActiveStorage::Attached::One)
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signature.download
else
signature.rewind && signature.read
end
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pdf.image StringIO.new(signature_content), fit: [max_signature_size, max_signature_size], position: :right
end
end
end
pdf.repeat(:all) do
pdf.move_cursor_to footer_height - 10
pdf.fill_color grey
if footer.present?
# We reduce the size of large footer so they can be drawn in the corresponding area.
# This is due to a font change, the replacing font is slightly bigger than the previous one
footer_font_size = footer.length > 170 ? 7 : 8
pdf.text footer, align: :center, size: footer_font_size
end
end
end