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