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refactor process doc

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This commit is contained in:
Pete Matsyburka
2026-05-22 13:33:22 +03:00
parent 29d3a80d3f
commit 891833e273
1 changed files with 25 additions and 21 deletions
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lib/templates/process_document.rb
+25 -21
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@@ -103,7 +103,15 @@ module Templates
promises =
range.map do |page_number|
Concurrent::Promise.execute(executor: pool) { build_and_upload_blob(doc, page_number) }
doc_page = doc.get_page(page_number)
bytes, width, height = doc_page.render_to_bitmap(width: MAX_WIDTH)
image = Vips::Image.new_from_memory(bytes, width, height, 4, :uchar)
Concurrent::Promise.execute(executor: pool) { build_and_upload_blob(image, page_number) }
ensure
doc_page&.close
end
Concurrent::Promise.zip(*promises).value!.each do |blob|
@@ -122,39 +130,27 @@ module Templates
pool&.kill
end
def build_and_upload_blob(doc, page_number, format = FORMAT)
doc_page = doc.get_page(page_number)
data, width, height = doc_page.render_to_bitmap(width: MAX_WIDTH)
page = Vips::Image.new_from_memory(data, width, height, 4, :uchar)
page = page.copy(interpretation: :srgb)
def build_and_upload_blob(image, page_number, format = FORMAT)
image = image.copy(interpretation: :srgb)
data =
if format == FORMAT
bitdepth = 2**page.stats.to_a[1..3].pluck(2).uniq.size
bitdepth = 2**image.stats.to_a[1..3].pluck(2).uniq.size
page.write_to_buffer(format, compression: 6, filter: 0, bitdepth:,
palette: true, Q: Q, dither: 0)
image.write_to_buffer(format, compression: 6, filter: 0, bitdepth:,
palette: true, Q: Q, dither: 0)
else
page.write_to_buffer(format, interlace: true, Q: JPEG_Q)
image.write_to_buffer(format, interlace: true, Q: JPEG_Q)
end
blob = ActiveStorage::Blob.new(
filename: "#{page_number}#{format}",
metadata: { analyzed: true, identified: true, width: page.width, height: page.height }
metadata: { analyzed: true, identified: true, width: image.width, height: image.height }
)
blob.upload(StringIO.new(data))
blob
rescue Vips::Error, Pdfium::PdfiumError => e
Rollbar.warning(e) if defined?(Rollbar)
nil
ensure
doc_page&.close
end
def maybe_flatten_form(data, pdf)
@@ -199,7 +195,15 @@ module Templates
def generate_pdf_preview_from_file(attachment, file_path, page_number)
doc = Pdfium::Document.open_file(file_path)
blob = build_and_upload_blob(doc, page_number, PREVIEW_FORMAT)
doc_page = doc.get_page(page_number)
bytes, width, height = doc_page.render_to_bitmap(width: MAX_WIDTH)
doc_page.close
image = Vips::Image.new_from_memory(bytes, width, height, 4, :uchar)
blob = build_and_upload_blob(image, page_number, PREVIEW_FORMAT)
ApplicationRecord.no_touching do
ActiveStorage::Attachment.create!(