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# SPDX-License-Identifier: AGPL-3.0-or-later
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# lint: pylint
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"""CORE (science)
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"""
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from datetime import datetime
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from urllib.parse import urlencode
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from searx.exceptions import SearxEngineAPIException
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about = {
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"website": 'https://core.ac.uk',
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"wikidata_id": 'Q22661180',
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"official_api_documentation": 'https://core.ac.uk/documentation/api/',
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"use_official_api": True,
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"require_api_key": True,
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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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nb_per_page = 10
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api_key = 'unset'
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base_url = 'https://core.ac.uk:443/api-v2/search/'
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search_string = '{query}?page={page}&pageSize={nb_per_page}&apiKey={apikey}'
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def request(query, params):
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if api_key == 'unset':
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raise SearxEngineAPIException('missing CORE API key')
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search_path = search_string.format(
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query=urlencode({'q': query}),
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nb_per_page=nb_per_page,
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page=params['pageno'],
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apikey=api_key,
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)
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params['url'] = base_url + search_path
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return params
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def response(resp):
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results = []
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json_data = resp.json()
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for result in json_data['data']:
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source = result['_source']
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url = None
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if source.get('urls'):
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url = source['urls'][0].replace('http://', 'https://', 1)
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if url is None and source.get('doi'):
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# use the DOI reference
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url = 'https://doi.org/' + source['doi']
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if url is None and source.get('downloadUrl'):
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# use the downloadUrl
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url = source['downloadUrl']
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if url is None and source.get('identifiers'):
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# try to find an ark id, see
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# https://www.wikidata.org/wiki/Property:P8091
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# and https://en.wikipedia.org/wiki/Archival_Resource_Key
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arkids = [
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identifier[5:] # 5 is the length of "ark:/"
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for identifier in source.get('identifiers')
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if isinstance(identifier, str) and identifier.startswith('ark:/')
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]
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if len(arkids) > 0:
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url = 'https://n2t.net/' + arkids[0]
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if url is None:
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continue
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publishedDate = None
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time = source['publishedDate'] or source['depositedDate']
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if time:
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publishedDate = datetime.fromtimestamp(time / 1000)
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# sometimes the 'title' is None / filter None values
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journals = [j['title'] for j in (source.get('journals') or []) if j['title']]
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publisher = source['publisher']
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if publisher:
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publisher = source['publisher'].strip("'")
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results.append(
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{
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'template': 'paper.html',
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'title': source['title'],
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'url': url,
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'content': source['description'] or '',
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# 'comments': '',
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'tags': source['topics'],
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'publishedDate': publishedDate,
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'type': (source['types'] or [None])[0],
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'authors': source['authors'],
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'editor': ', '.join(source['contributors'] or []),
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'publisher': publisher,
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'journal': ', '.join(journals),
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# 'volume': '',
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# 'pages' : '',
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# 'number': '',
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'doi': source['doi'],
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'issn': [x for x in [source.get('issn')] if x],
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'isbn': [x for x in [source.get('isbn')] if x], # exists in the rawRecordXml
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'pdf_url': source.get('repositoryDocument', {}).get('pdfOrigin'),
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}
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)
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return results
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