2298d36bed
- Create Economist SubmissionTracking package correctly: * mainArticle = full blog post content * coverLetter = 216-word SIR— letter * Links to blog post via blogPostId - Archive 'Letter to The Economist' from blog posts (it's the cover letter) - Fix date display on article cards (use published_at) - Target publication already displaying via blue badge Database changes: - Make blogPostId optional in SubmissionTracking model - Economist package ID: 68fa85ae49d4900e7f2ecd83 - Le Monde package ID: 68fa2abd2e6acd5691932150 Next: Enhanced modal with tabs, validation, export 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
93 lines
3.5 KiB
Python
93 lines
3.5 KiB
Python
"""PDF/A generation."""
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from functools import partial
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import pydyf
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from .metadata import add_metadata
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def pdfa(pdf, metadata, document, page_streams, attachments, compress,
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version, variant):
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"""Set metadata for PDF/A documents."""
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# Handle attachments.
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if version == 1:
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# Remove embedded files dictionary.
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if 'Names' in pdf.catalog and 'EmbeddedFiles' in pdf.catalog['Names']:
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del pdf.catalog['Names']['EmbeddedFiles']
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if version <= 2:
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# Remove attachments.
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for pdf_object in pdf.objects:
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if not isinstance(pdf_object, dict):
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continue
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if pdf_object.get('Type') != '/Filespec':
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continue
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reference = int(pdf_object['EF']['F'].split()[0])
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stream = pdf.objects[reference]
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# Remove all attachments for version 1.
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# Remove non-PDF attachments for version 2.
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# TODO: check that PDFs are actually PDF/A-2+ files.
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if version == 1 or stream.extra['Subtype'] != '/application#2fpdf':
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del pdf_object['EF']
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if version >= 3:
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# Add AF for attachments.
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relationships = {
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f'<{attachment.md5}>': attachment.relationship
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for attachment in attachments if attachment.md5}
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pdf_attachments = []
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if 'Names' in pdf.catalog and 'EmbeddedFiles' in pdf.catalog['Names']:
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reference = int(pdf.catalog['Names']['EmbeddedFiles'].split()[0])
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names = pdf.objects[reference]
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for name in names['Names'][1::2]:
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pdf_attachments.append(name)
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for pdf_object in pdf.objects:
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if not isinstance(pdf_object, dict):
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continue
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if pdf_object.get('Type') != '/Filespec':
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continue
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reference = int(pdf_object['EF']['F'].split()[0])
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checksum = pdf.objects[reference].extra['Params']['CheckSum']
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relationship = relationships.get(checksum, 'Unspecified')
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pdf_object['AFRelationship'] = f'/{relationship}'
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pdf_attachments.append(pdf_object.reference)
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if pdf_attachments:
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if 'AF' not in pdf.catalog:
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pdf.catalog['AF'] = pydyf.Array()
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pdf.catalog['AF'].extend(pdf_attachments)
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# Print annotations.
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for pdf_object in pdf.objects:
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if isinstance(pdf_object, dict) and pdf_object.get('Type') == '/Annot':
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pdf_object['F'] = 2 ** (3 - 1)
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# Common PDF metadata stream.
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if version == 1:
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# Metadata compression is forbidden for version 1.
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compress = False
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add_metadata(pdf, metadata, 'a', version, variant, compress)
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VARIANTS = {
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'pdf/a-1b': (
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partial(pdfa, version=1, variant='B'),
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{'version': '1.4', 'identifier': True, 'srgb': True}),
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'pdf/a-2b': (
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partial(pdfa, version=2, variant='B'),
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{'version': '1.7', 'identifier': True, 'srgb': True}),
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'pdf/a-3b': (
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partial(pdfa, version=3, variant='B'),
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{'version': '1.7', 'identifier': True, 'srgb': True}),
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'pdf/a-4b': (
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partial(pdfa, version=4, variant='B'),
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{'version': '2.0', 'identifier': True, 'srgb': True}),
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'pdf/a-2u': (
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partial(pdfa, version=2, variant='U'),
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{'version': '1.7', 'identifier': True, 'srgb': True}),
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'pdf/a-3u': (
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partial(pdfa, version=3, variant='U'),
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{'version': '1.7', 'identifier': True, 'srgb': True}),
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'pdf/a-4u': (
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partial(pdfa, version=4, variant='U'),
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{'version': '2.0', 'identifier': True, 'srgb': True}),
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}
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