papis-extract/papis_extract/extraction.py

import re
from pathlib import Path
from typing import Protocol

import papis.config
import papis.document
import papis.logging
from papis.document import Document

from papis_extract.annotation import Annotation
from papis_extract.extractors import ExtractionError

logger = papis.logging.get_logger(__name__)


class Extractor(Protocol):
    def can_process(self, filename: Path) -> bool: ...

    def run(self, filename: Path) -> list[Annotation]: ...


def start(
    extractor: Extractor,
    document: Document,
) -> list[Annotation]:
    """Extract all annotations from passed documents.

    Returns all annotations contained in the papis
    documents passed in.
    """
    annotations: list[Annotation] = []
    file_available: bool = False

    for file in document.get_files():
        fname = Path(file)
        if not extractor.can_process(fname):
            continue
        file_available = True

        try:
            annotations.extend(extractor.run(fname))
        except ExtractionError as e:
            print(f"File extraction errors for {file}.\n{e}")

    if not file_available:
        # have to remove curlys or papis logger gets upset
        desc = re.sub("[{}]", "", papis.document.describe(document))
        logger.info(f"No {type(extractor)} file for document: {desc}")

    return annotations