Fourth canonical loader. Maps canonical-documents.xlsx by header name,
routes each attribution register-first by source_ref (provisional person
when a slug is unmatched), ALWAYS retains the raw sender_name/receiver_names
in sender_text/receiver_text, splits pipe-delimited receivers, parses clean
date_iso/date_precision/date_end/date_raw with no semantic logic, attaches
the tag by canonical tag_path, and keeps the S3 upload + thumbnail plumbing
in small resolveFile/uploadToS3/buildDocument methods. Documents upsert by
index (originalFilename); UPLOADED when a file resolves on disk, PLACEHOLDER
otherwise.
Security guards ported intact from MassImportService BEFORE retiring it:
isValidImportFilename (forward/back slash, three Unicode slash homoglyphs,
.., null byte, absolute path), findFileRecursive canonical-path containment
(symlink-escape), and the %PDF magic-byte check + FILE_READ_ERROR path. The
file column is treated as hostile input (CWE-22): its basename is validated
then resolved only inside importDir, so a traversal value cannot escape.
Extracts the verbatim ImportStatus/SkipReason/SkippedFile shape into its own
class so the admin UI contract is unchanged.
Assumption: the committed canonical-documents.xlsx carries no
sender_category/receiver_category columns (the issue's described schema) —
the normalizer already resolved Option-A routing into slugs + raw names, so
the loader routes by slug presence rather than a category enum.
Refs #669
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
c56ba6219c