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114 lines
3.8 KiB
114 lines
3.8 KiB
# frozen_string_literal: true
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module Submitters
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module CreateStampAttachment
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WIDTH = 400
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HEIGHT = 200
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TRANSPARENT_PIXEL = "\x89PNG\r\n\u001A\n\u0000\u0000\u0000\rIHDR\u0000" \
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"\u0000\u0000\u0001\u0000\u0000\u0000\u0001\b\u0004" \
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"\u0000\u0000\u0000\xB5\u001C\f\u0002\u0000\u0000\u0000" \
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"\vIDATx\xDAc\xFC_\u000F\u0000\u0002\x83\u0001\x804\xC3ڨ" \
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"\u0000\u0000\u0000\u0000IEND\xAEB`\x82"
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module_function
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def call(submitter, with_logo: true)
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attachment = build_attachment(submitter, with_logo:)
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attachment.save!
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attachment
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end
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def build_attachment(submitter, with_logo: true)
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image = generate_stamp_image(submitter, with_logo:)
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image_data = image.write_to_buffer('.png')
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checksum = Digest::MD5.base64digest(image_data)
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attachment = submitter.attachments.joins(:blob).find_by(blob: { checksum: })
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attachment || submitter.attachments_attachments.new(
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blob: ActiveStorage::Blob.create_and_upload!(io: StringIO.new(image_data), filename: 'stamp.png'),
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metadata: { analyzed: true, identified: true, width: image.width, height: image.height }
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)
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end
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def generate_stamp_image(submitter, with_logo: true)
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logo =
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if with_logo
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Vips::Image.new_from_buffer(load_logo(submitter).read, '')
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else
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Vips::Image.new_from_buffer(TRANSPARENT_PIXEL, '').resize(WIDTH)
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end
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logo = logo.resize([WIDTH / logo.width.to_f, HEIGHT / logo.height.to_f].min)
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base_layer = Vips::Image.black(WIDTH, HEIGHT).new_from_image([255, 255, 255]).copy(interpretation: :srgb)
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opacity_layer = Vips::Image.new_from_buffer(TRANSPARENT_PIXEL, '').resize(WIDTH)
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text = build_text_image(submitter)
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text_layer = text.new_from_image([0, 0, 0]).copy(interpretation: :srgb)
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text_layer = text_layer.bandjoin(text)
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base_layer = base_layer.composite(logo, 'over',
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x: (WIDTH - logo.width) / 2,
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y: (HEIGHT - logo.height) / 2)
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base_layer = base_layer.composite(opacity_layer, 'over')
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base_layer.composite(text_layer, 'over',
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x: (WIDTH - text_layer.width) / 2,
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y: (HEIGHT - text_layer.height) / 2)
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end
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def build_text_image(submitter)
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if submitter.completed_at
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time = I18n.l(submitter.completed_at.in_time_zone(submitter.submission.account.timezone),
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format: :long,
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locale: submitter.submission.account.locale)
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timezone = TimeUtils.timezone_abbr(submitter.submission.account.timezone, submitter.completed_at)
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end
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name = build_name(submitter)
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role = build_role(submitter)
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digitally_signed_by = I18n.t(:digitally_signed_by, locale: submitter.submission.account.locale)
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name = ERB::Util.html_escape(name)
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role = ERB::Util.html_escape(role)
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text = %(<span size="90">#{digitally_signed_by}:\n<b>#{name}</b>\n#{role}#{time} #{timezone}</span>)
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Vips::Image.text(text, width: WIDTH, height: HEIGHT, wrap: :'word-char')
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end
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def build_name(submitter)
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if submitter.name.present? && submitter.email.present?
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"#{submitter.name} #{submitter.email}"
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else
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submitter.name || submitter.email || submitter.phone
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end
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end
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def build_role(submitter)
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if submitter.submission.template_submitters.size > 1
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item = submitter.submission.template_submitters.find { |e| e['uuid'] == submitter.uuid }
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"#{I18n.t(:role, locale: submitter.account.locale)}: #{item['name']}\n"
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else
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''
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end
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end
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def load_logo(_submitter)
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PdfIcons.stamp_logo_io
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end
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end
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end
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