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import json
from typing import Iterable, Optional
from chocula.common import DirectoryLoader
from chocula.database import DirectoryInfo, HomepageUrl
class ZdbFizeLoader(DirectoryLoader):
"""
URL metadata scraped from ZDB "FIZE" interface. Consists of just ISSN / URL
pair.
Only interested in the homepage.
"""
source_slug = "zdb_fize"
def open_file(self) -> Iterable:
return open(self.config.zdb_fize.filepath, "r")
def parse_record(self, record) -> Optional[DirectoryInfo]:
if not record.strip():
return None
record = json.loads(record)
info = DirectoryInfo(directory_slug=self.source_slug, issnl=record["issn"])
homepage = HomepageUrl.from_url(record["homepage"])
if homepage:
info.homepage_urls.append(homepage)
else:
return None
return info
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