Updates to retraction status checker

.gitignore

@@ -303,3 +303,8 @@ cython_debug/
 tests/*txt
 tests/*html
 tests/test_index/*
+tests/example.*
+tests/example2.*
+
+# Client data
+paperqa/clients/client_data/retractions.csv

paperqa/clients/crossref.py

@@ -11,6 +11,8 @@
 from urllib.parse import quote
 
 import aiohttp
+from anyio import open_file
+from tenacity import retry, stop_after_attempt, wait_exponential
 
 from paperqa.types import CITATION_FALLBACK_DATA, DocDetails
 from paperqa.utils import (
@@ -104,6 +106,20 @@ def crossref_headers() -> dict[str, str]:
     return {}
 
 
+def get_crossref_mailto() -> str:
+    """Crossref mailto if available, otherwise a default."""
+    MAILTO = os.getenv("CROSSREF_MAILTO")
+
+    if not MAILTO:
+        logger.warning(
+            "CROSSREF_MAILTO environment variable not set. Crossref API rate limits may"
+            " apply."
+        )
+        return "[email protected]"
+
+    return MAILTO
+
+
 async def doi_to_bibtex(
     doi: str,
     session: aiohttp.ClientSession,
@@ -251,12 +267,7 @@ async def get_doc_details_from_crossref(  # noqa: PLR0912
 
     inputs_msg = f"DOI {doi}" if doi is not None else f"title {title}"
 
-    if not (CROSSREF_MAILTO := os.getenv("CROSSREF_MAILTO")):
-        logger.warning(
-            "CROSSREF_MAILTO environment variable not set. Crossref API rate limits may"
-            " apply."
-        )
-        CROSSREF_MAILTO = "[email protected]"
+    CROSSREF_MAILTO = get_crossref_mailto()
     quoted_doi = f"/{quote(doi, safe='')}" if doi else ""
     url = f"{CROSSREF_BASE_URL}/works{quoted_doi}"
     params = {"mailto": CROSSREF_MAILTO}
@@ -335,6 +346,45 @@ async def get_doc_details_from_crossref(  # noqa: PLR0912
     return await parse_crossref_to_doc_details(message, session, query_bibtex)
 
 
+@retry(
+    stop=stop_after_attempt(3),
+    wait=wait_exponential(multiplier=5, min=5),
+    reraise=True,
+)
+async def download_retracted_dataset(
+    retraction_data_path: os.PathLike | str,
+) -> None:
+    """
+    Download the retraction dataset from Crossref.
+
+    Saves the retraction dataset to `retraction_data_path`.
+    """
+    url = f"https://api.labs.crossref.org/data/retractionwatch?{get_crossref_mailto()}"
+
+    async with (
+        aiohttp.ClientSession() as session,
+        session.get(
+            url,
+            timeout=aiohttp.ClientTimeout(total=300),
+        ) as response,
+    ):
+        response.raise_for_status()
+
+        logger.info(
+            f"Retraction data was not cashed. Downloading retraction data from {url}..."
+        )
+
+        async with await open_file(str(retraction_data_path), "wb") as f:
+            while True:
+                chunk = await response.content.read(1024)
+                if not chunk:
+                    break
+                await f.write(chunk)
+
+        if os.path.getsize(str(retraction_data_path)) == 0:
+            raise RuntimeError("Retraction data is empty")
+
+
 class CrossrefProvider(DOIOrTitleBasedProvider):
     async def _query(self, query: TitleAuthorQuery | DOIQuery) -> DocDetails | None:
         if isinstance(query, DOIQuery):

paperqa/clients/retractions.py

@@ -5,14 +5,12 @@
 import logging
 import os
 
-import aiohttp
-from anyio import open_file
 from pydantic import ValidationError
-from tenacity import retry, stop_after_attempt, wait_exponential
 
 from paperqa.types import DocDetails
 
 from .client_models import DOIQuery, MetadataPostProcessor
+from .crossref import download_retracted_dataset
 
 logger = logging.getLogger(__name__)
 
@@ -52,40 +50,6 @@ def _has_cache_expired(self) -> bool:
     def _is_csv_cached(self) -> bool:
         return os.path.exists(self.retraction_data_path)
 
-    @retry(
-        stop=stop_after_attempt(3),
-        wait=wait_exponential(multiplier=5, min=5),
-        reraise=True,
-    )
-    async def _download_retracted_dataset(self) -> None:
-
-        if not (CROSSREF_MAILTO := os.getenv("CROSSREF_MAILTO")):
-            CROSSREF_MAILTO = "[email protected]"
-        url = f"https://api.labs.crossref.org/data/retractionwatch?{CROSSREF_MAILTO}"
-
-        async with (
-            aiohttp.ClientSession() as session,
-            session.get(
-                url,
-                timeout=aiohttp.ClientTimeout(total=300),
-            ) as response,
-        ):
-            response.raise_for_status()
-
-            logger.info(
-                f"Retraction data was not cashed. Downloading retraction data from {url}..."
-            )
-
-            async with await open_file(self.retraction_data_path, "wb") as f:
-                while True:
-                    chunk = await response.content.read(1024)
-                    if not chunk:
-                        break
-                    await f.write(chunk)
-
-            if os.path.getsize(self.retraction_data_path) == 0:
-                raise RuntimeError("Retraction data is empty")
-
     def _filter_dois(self) -> None:
         with open(self.retraction_data_path, newline="", encoding="utf-8") as csvfile:
             reader = csv.DictReader(csvfile)
@@ -96,7 +60,7 @@ def _filter_dois(self) -> None:
 
     async def load_data(self) -> None:
         if not self._is_csv_cached() or self._has_cache_expired():
-            await self._download_retracted_dataset()
+            await download_retracted_dataset(self.retraction_data_path)
 
         self._filter_dois()
 

paperqa/types.py

@@ -326,6 +326,7 @@ class DocDetails(Doc):
             " quality and None means it needs to be hydrated."
         ),
     )
+
     is_retracted: bool | None = Field(
         default=None, description="Flag for whether the paper is retracted."
     )
@@ -550,7 +551,14 @@ def __getitem__(self, item: str):
     def formatted_citation(self) -> str:
 
         if self.is_retracted:
-            return f"**RETRACTED ARTICLE** Citation: {self.citation} Retrieved from http://retractiondatabase.org/."
+            base_message = "**RETRACTED ARTICLE**"
+            retract_info = "Retrieved from http://retractiondatabase.org/."
+            citation_message = (
+                f"Citation: {self.citation}"
+                if self.citation
+                else f"Original DOI: {self.doi}"
+            )
+            return f"{base_message} {citation_message} {retract_info}"
 
         if (
             self.citation is None  # type: ignore[redundant-expr]
@@ -561,6 +569,7 @@ def formatted_citation(self) -> str:
                 "Citation, citationCount, and sourceQuality are not set -- do you need"
                 " to call `hydrate`?"
             )
+
         quality = (
             SOURCE_QUALITY_MESSAGES[self.source_quality]
             if self.source_quality >= 0