Metadata never fails a drop: deterministic title/author detection (metadata, first-page text, OCR of scanned first pages, file name), sources recorded in book.json; decrypt scratch copy before OCR
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Audiobook Producer
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"""Title and author detection. Run: python3 -m unittest discover -s _pipeline/tests -v (from the repo root)"""
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import json
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import os
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import sys
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import tempfile
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import unittest
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HERE = os.path.dirname(os.path.abspath(__file__))
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sys.path.insert(0, os.path.join(HERE, ".."))
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sys.path.insert(0, HERE)
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import bookio
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import ingest
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import meta
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import settings
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try:
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from helpers import make_pdf
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except ImportError:
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make_pdf = None
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TITLE_PAGE = ["THE HINDU-YOGI", "", "Science of Breath", "", "A Complete Manual of the Oriental Breathing Philosophy", "", "By YOGI RAMACHARAKA", "", "THE YOGI PUBLICATION SOCIETY"]
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@unittest.skipIf(make_pdf is None, "reportlab not installed")
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class MetaTests(unittest.TestCase):
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def setUp(self):
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self.tmp = tempfile.TemporaryDirectory()
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self.d = self.tmp.name
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self.cfg = settings.load()
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self.cfg["work_dir"] = os.path.join(self.d, "work")
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self.cfg["books_dir"] = os.path.join(self.d, "books")
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meta.OCR_FUNC = None
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def tearDown(self):
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meta.OCR_FUNC = None
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self.tmp.cleanup()
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def pdf(self, name, pages, **kw):
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return make_pdf(os.path.join(self.d, name), pages, **kw)
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def test_pdf_metadata_title_and_byline_author(self):
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p = self.pdf("x.pdf", [["Some Title", "", "By Jane Q. Doe"], ["text"]], title="a quiet book")
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m = meta.resolve(self.cfg, p)
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self.assertEqual((m["title"], m["author"]), ("A Quiet Book", "Jane Q. Doe"))
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self.assertEqual(m["title_source"], "pdf-metadata")
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self.assertTrue(m["author_source"].startswith("first-page-text (by-line"))
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self.assertEqual(m["warnings"], [])
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def test_junk_metadata_author_is_ignored_when_page_names_the_author(self):
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p = self.pdf("x.pdf", [["THE BOOK", "By Glenn Clark"]], title="THE BOOK", author="Bluepen")
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self.assertEqual(meta.resolve(self.cfg, p)["author"], "Glenn Clark")
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def test_metadata_author_used_when_page_has_none(self):
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p = self.pdf("x.pdf", [["Just a page of prose without any credits at all."]], title="Real Title", author="Mary Shelley")
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m = meta.resolve(self.cfg, p)
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self.assertEqual((m["author"], m["author_source"]), ("Mary Shelley", "pdf-metadata"))
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def test_page_title_and_uppercase_byline_without_metadata(self):
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p = self.pdf("scan0001.pdf", [TITLE_PAGE, ["body"]])
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m = meta.resolve(self.cfg, p)
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self.assertEqual(m["author"], "Yogi Ramacharaka")
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self.assertTrue(m["title_source"].startswith("first-page-text"))
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self.assertEqual(m["title"], "The Hindu-yogi") # first block without a file-name hint
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def test_file_name_hint_picks_the_title_line_on_the_page(self):
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p = self.pdf("2015.47927.Science-Of-Breath.pdf", [TITLE_PAGE])
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m = meta.resolve(self.cfg, p)
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self.assertEqual((m["title"], m["author"]), ("Science of Breath", "Yogi Ramacharaka"))
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def test_name_line_under_title_without_by(self):
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p = self.pdf("x.pdf", [["A Study of Rivers", "Jane Doe", "", "Oxford Press 1921"]])
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m = meta.resolve(self.cfg, p)
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self.assertEqual((m["title"], m["author"]), ("A Study of Rivers", "Jane Doe"))
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self.assertTrue(m["author_source"].startswith("first-page-text (name-line"))
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def test_scanned_first_pages_are_read_by_ocr(self):
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p = self.pdf("2015.47927.Science-Of-Breath.pdf", [[], [], [], [], []])
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calls = []
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def fake(pdf, first, last, lang):
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calls.append((first, last))
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return [(5, "\n".join(TITLE_PAGE))] + [(i, "") for i in range(first, 5)]
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meta.OCR_FUNC = fake
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m = meta.resolve(self.cfg, p)
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self.assertEqual(calls, [(1, 5)])
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self.assertEqual((m["title"], m["author"]), ("Science of Breath", "Yogi Ramacharaka"))
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self.assertIn("first-page-ocr", m["author_source"])
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self.assertIn("first-page-ocr", m["title_source"])
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meta.resolve(self.cfg, p)
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self.assertEqual(len(calls), 1, "the detection from the PDF is cached")
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def test_nothing_found_uses_file_name_and_unknown_author_with_warning(self):
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p = self.pdf("2015.47927.Science-Of-Breath.pdf", [[], []])
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m = meta.resolve(self.cfg, p) # no tesseract here and no OCR_FUNC: pages stay unreadable
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self.assertEqual((m["title"], m["author"]), ("Science Of Breath", "Unknown"))
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self.assertEqual(m["author_source"], "default")
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self.assertTrue(m["title_source"].startswith("file-name"))
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kinds = [w[0] for w in m["warnings"]]
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self.assertIn("metadata-author", kinds)
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self.assertIn("metadata-title", kinds)
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self.assertEqual(ingest.author_slug(m["author"]), "unknown")
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def test_title_from_filename_pattern_with_author(self):
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p = self.pdf("The Man Who Tapped - by Glenn Clark (Walter Russell).pdf", [[]])
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m = meta.resolve(self.cfg, p)
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self.assertEqual((m["title"], m["author"]), ("The Man Who Tapped", "Glenn Clark"))
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self.assertEqual(m["author_source"], "file-name (The Man Who Tapped - by Glenn Clark (Walter Russell).pdf)")
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def test_title_found_author_missing_gives_unknown_and_warning(self):
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p = self.pdf("x.pdf", [["body text only"]], title="Only A Title")
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m = meta.resolve(self.cfg, p)
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self.assertEqual((m["title"], m["author"]), ("Only a Title", "Unknown"))
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self.assertIn("metadata-author", [w[0] for w in m["warnings"]])
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def test_sidecar_and_arguments_win(self):
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p = self.pdf("x.pdf", [["T", "By Someone Else"]], title="Other")
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m = meta.resolve(self.cfg, p, sidecar={"title": "Side Title", "author": "Side Author"})
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self.assertEqual((m["title"], m["author"], m["title_source"], m["author_source"]), ("Side Title", "Side Author", "sidecar-json", "sidecar-json"))
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m = meta.resolve(self.cfg, p, title="Arg Title", sidecar={"title": "Side Title", "author": "Side Author"})
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self.assertEqual((m["title"], m["title_source"], m["author"]), ("Arg Title", "argument", "Side Author"))
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def test_url_file_name_hint_is_used_when_the_pdf_name_is_only_an_id(self):
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p = self.pdf("2401.01234.pdf", [[]])
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m = meta.resolve(self.cfg, p, name_hints=["Walden Pond Notes.url"])
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self.assertEqual(m["title"], "Walden Pond Notes")
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self.assertIn("Walden Pond Notes.url", m["title_source"])
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def test_never_raises_on_a_file_that_is_not_a_pdf(self):
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p = os.path.join(self.d, "My Odd_Scan 7.pdf")
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open(p, "w").write("this is not a pdf")
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m = meta.resolve(self.cfg, p)
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self.assertEqual(m["author"], "Unknown")
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self.assertTrue(m["title"])
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def test_ingest_records_sources_and_warnings_in_the_book_folder(self):
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p = self.pdf("2015.47927.Science-Of-Breath.pdf", [[], []])
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self.cfg["ocr"]["enabled"] = False
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d = ingest.run(self.cfg, p, source_url="https://example.org/a.pdf")
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book = bookio.read_book(d)
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self.assertEqual(d, os.path.join(self.cfg["books_dir"], "unknown", "science-of-breath"))
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self.assertEqual(book["author"], "Unknown")
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self.assertEqual(book["metadata_sources"]["author"], "default")
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self.assertTrue(book["metadata_sources"]["title"].startswith("file-name"))
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self.assertEqual(book["source_url"], "https://example.org/a.pdf")
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log = open(os.path.join(d, "warnings.log")).read()
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self.assertIn("ingest-metadata | metadata-author |", log)
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def test_clark_style_page_gives_the_same_answer_as_before(self):
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p = self.pdf("c.pdf", [["THE MAN WHO TAPPED THE SECRETS OF THE UNIVERSE"], ["By Glenn Clark"]], title="THE MAN WHO TAPPED THE SECRETS OF THE UNIVERSE", author="Bluepen")
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m = meta.resolve(self.cfg, p)
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self.assertEqual((m["title"], m["author"]), ("The Man Who Tapped the Secrets of the Universe", "Glenn Clark"))
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class PureTests(unittest.TestCase):
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def test_cleaning_file_names(self):
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self.assertEqual(meta.clean_filename_title("2015.47927.Science-Of-Breath"), "Science Of Breath")
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self.assertEqual(meta.clean_filename_title("my_book_final"), "my book")
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self.assertEqual(meta.filename_candidates(["2401.01234.pdf", "Deep Work.url"])[0], "Deep Work")
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def test_author_rules(self):
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self.assertEqual(meta.first_author("YOGI RAMACHARAKA"), "Yogi Ramacharaka")
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self.assertEqual(meta.first_author("Glenn Clark and Walter Russell"), "Glenn Clark")
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self.assertIsNone(meta.first_author("the sea and the sky"))
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self.assertIsNone(meta.first_author("The Yogi Publication Society"))
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if __name__ == "__main__":
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unittest.main()
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