add pdf generation
This commit is contained in:
Alex Turchyn
@@ -2,53 +2,124 @@
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module Submissions
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module GenerateResultAttachments
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FONT_SIZE = 12
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FONT_NAME = 'Helvetica'
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module_function
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# rubocop:disable Metrics
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def call(submission)
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cert = submission.flow.account.encrypted_configs
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.find_by(key: EncryptedConfig::ESIGN_CERTS_KEY).value
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zip_file = Tempfile.new
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zip_stream = Zip::ZipOutputStream.open(zip_file)
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submission.flow.schema.map do |item|
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document = submission.flow.documents.find { |e| e.uuid == item['attachment_uuid'] }
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field_area_index = Flows.build_field_areas_index(submission.flow)
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document.open do |tempfile|
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pdf = CombinePDF.load(tempfile.path)
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pdf.pages.each_with_index do |page, index|
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blocks = field_area_index.dig(document.uuid, index)
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next if blocks.blank?
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blocks.each do |block|
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area, field = block.values_at(:area, :field)
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page.textbox(submission.values[field['uuid']],
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x: area['x'] * page.page_size[2],
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y: page.page_size[3] - (area['y'] * page.page_size[3]),
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width: area['w'] * page.page_size[2],
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height: area['h'] * page.page_size[3])
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end
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end
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string = pdf.to_pdf
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io = StringIO.new(string)
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zip_stream.put_next_entry("#{item['name']}.pdf")
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zip_stream.write(string)
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ActiveStorage::Attachment.create!(
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blob: ActiveStorage::Blob.create_and_upload!(
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io:, filename: "#{item['name']}.pdf"
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),
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name: 'documents',
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record: submission
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)
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pdfs_index =
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submission.flow.documents.to_h do |attachment|
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[attachment.uuid, HexaPDF::Document.new(io: StringIO.new(attachment.download))]
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end
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submission.flow.fields.each do |field|
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field.fetch('areas', []).each do |area|
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pdf = pdfs_index[area['attachment_uuid']]
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page = pdf.pages[area['page']]
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width = page.box.width
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height = page.box.height
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value = submission.values[field['uuid']]
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canvas = page.canvas(type: :overlay)
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case field['type']
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when 'image', 'signature'
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attachment = submission.attachments.find { |a| a.uuid == value }
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io = StringIO.new(attachment.download)
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Vips::Image.new_from_buffer(io.read, '')
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scale = [(area['w'] * width) / attachment.metadata['width'],
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(area['h'] * height) / attachment.metadata['height']].min
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canvas.image(io, at: [area['x'] * width,
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height - (area['y'] * height) -
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(((attachment.metadata['height'] * scale) + (area['h'] * height)) / 2)],
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width: attachment.metadata['width'] * scale,
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height: attachment.metadata['height'] * scale)
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when 'attachment'
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Array.wrap(value).each_with_index do |uuid, index|
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attachment = submission.attachments.find { |a| a.uuid == uuid }
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canvas.image(PdfIcons.paperclip_io,
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at: [area['x'] * width,
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height - ((area['y'] * height) + (1.2 * FONT_SIZE) - (FONT_SIZE * index))],
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width: FONT_SIZE, height: FONT_SIZE)
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canvas.font(FONT_NAME, size: FONT_SIZE)
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canvas.text(attachment.filename.to_s,
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at: [(area['x'] * width) + FONT_SIZE,
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height - ((area['y'] * height) + FONT_SIZE - (FONT_SIZE * index))])
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page[:Annots] ||= []
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page[:Annots] << pdf.add({
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Type: :Annot, Subtype: :Link,
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Rect: [
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area['x'] * width,
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height - (area['y'] * height),
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(area['x'] * width) + (area['w'] * width),
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height - (area['y'] * height) - FONT_SIZE
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],
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A: { Type: :Action, S: :URI, URI: attachment.url }
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})
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end
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when 'checkbox'
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Array.wrap(value).each_with_index do |value, index|
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canvas.image(PdfIcons.check_io,
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at: [area['x'] * width,
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height - ((area['y'] * height) + (1.2 * FONT_SIZE) - (FONT_SIZE * index))],
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width: FONT_SIZE, height: FONT_SIZE)
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canvas.font(FONT_NAME, size: FONT_SIZE)
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canvas.text(value,
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at: [(area['x'] * width) + FONT_SIZE,
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height - ((area['y'] * height) + FONT_SIZE - (FONT_SIZE * index))])
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end
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when 'date'
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canvas.font(FONT_NAME, size: FONT_SIZE)
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canvas.text(I18n.l(Date.parse(value)), at: [area['x'] * width, height - ((area['y'] * height) + FONT_SIZE)])
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else
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canvas.font(FONT_NAME, size: FONT_SIZE)
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canvas.text(value.to_s, at: [area['x'] * width, height - ((area['y'] * height) + FONT_SIZE)])
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end
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end
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end
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submission.flow.schema.map do |item|
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document = submission.flow.documents.find { |a| a.uuid == item['attachment_uuid'] }
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io = StringIO.new
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zip_stream.put_next_entry("#{item['name']}.pdf")
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zip_stream.write(io.string)
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pdf = pdfs_index[item['attachment_uuid']]
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pdf.sign(io, reason: "Signed by #{submission.email}",
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doc_mdp_permissions: :no_changes,
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certificate: OpenSSL::X509::Certificate.new(cert['cert']),
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key: OpenSSL::PKey::RSA.new(cert['key']),
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certificate_chain: [OpenSSL::X509::Certificate.new(cert['sub_ca']),
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OpenSSL::X509::Certificate.new(cert['root_ca'])])
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submission.documents.attach(io: StringIO.new(io.string), filename: document.filename)
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end
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zip_stream.close
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submission.archive.attach(io: zip_file, filename: 'submission.zip')
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submission.archive.attach(io: zip_file, filename: "#{submission.flow.name}.zip")
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end
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# rubocop:enable Metrics
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end
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end
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