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# SPDX-License-Identifier: AGPL-3.0-or-later
"""CrossRef"""
from urllib.parse import urlencode
from datetime import datetime
about = {
"website": "https://www.crossref.org/",
"wikidata_id": "Q5188229",
"official_api_documentation": "https://api.crossref.org",
"use_official_api": False,
"require_api_key": False,
"results": "JSON",
}
categories = ["science", "scientific publications"]
paging = True
search_url = "https://api.crossref.org/works"
def request(query, params):
params["url"] = search_url + "?" + urlencode({"query": query, "offset": 20 * (params["pageno"] - 1)})
return params
def response(resp):
results = []
for record in resp.json()["message"]["items"]:
if record["type"] == "component":
# These seem to be files published along with papers. Not something you'd search for
continue
result = {
"template": "paper.html",
"content": record.get("abstract", ""),
"doi": record.get("DOI"),
"pages": record.get("page"),
"publisher": record.get("publisher"),
"tags": record.get("subject"),
"type": record.get("type"),
"url": record.get("URL"),
"volume": record.get("volume"),
}
if record["type"] == "book-chapter":
result["title"] = record["container-title"][0]
if record["title"][0].lower().strip() != result["title"].lower().strip():
result["title"] += f" ({record['title'][0]})"
else:
result["title"] = record["title"][0] if "title" in record else record.get("container-title", [None])[0]
result["journal"] = record.get("container-title", [None])[0] if "title" in record else None
if "resource" in record and "primary" in record["resource"] and "URL" in record["resource"]["primary"]:
result["url"] = record["resource"]["primary"]["URL"]
if "published" in record and "date-parts" in record["published"]:
result["publishedDate"] = datetime(*(record["published"]["date-parts"][0] + [1, 1][:3]))
result["authors"] = [a.get("given", "") + " " + a.get("family", "") for a in record.get("author", [])]
result["isbn"] = record.get("isbn") or [i["value"] for i in record.get("isbn-type", [])]
# All the links are not PDFs, even if the URL ends with ".pdf"
# result["pdf_url"] = record.get("link", [{"URL": None}])[0]["URL"]
results.append(result)
return results
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