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Refactor Reddit scrapers into a more reasonable code structure

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Cf. #328
This commit is contained in:
JustAnotherArchivist
2021-12-24 04:58:32 +00:00
parent 4dd3ee6e47
commit eee06d8593
1 changed files with 33 additions and 25 deletions
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58
snscrape/modules/reddit.py
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@@ -202,33 +202,41 @@ class RedditPushshiftScraper(snscrape.base.Scraper):
subparser.add_argument('--after', metavar = 'TIMESTAMP', type = int, help = 'Fetch results after a Unix timestamp') subparser.add_argument('--after', metavar = 'TIMESTAMP', type = int, help = 'Fetch results after a Unix timestamp')
def _make_scraper(name_, validationFunc, apiField): class RedditScraper(RedditPushshiftScraper):
class Scraper(RedditPushshiftScraper): def __init__(self, name, **kwargs):
name = f'reddit-{name_}' super().__init__(**kwargs)
self._name = name
if not type(self)._validationFunc(self._name):
raise ValueError(f'invalid {type(self).name.split("-", 1)[1]} name')
def __init__(self, name, **kwargs): def get_items(self):
super().__init__(**kwargs) yield from self._iter_api_submissions_and_comments({type(self)._apiField: self._name})
self._name = name
if not validationFunc(self._name):
raise ValueError(f'invalid {name_} name')
def get_items(self): @classmethod
yield from self._iter_api_submissions_and_comments({apiField: self._name}) def setup_parser(cls, subparser):
super()._setup_parser_opts(subparser)
name = cls.name.split('-', 1)[1]
subparser.add_argument(name, type = snscrape.base.nonempty_string(name))
@classmethod @classmethod
def setup_parser(cls, subparser): def from_args(cls, args):
super()._setup_parser_opts(subparser) name = cls.name.split('-', 1)[1]
subparser.add_argument(name_, type = snscrape.base.nonempty_string(name_)) return cls._construct(args, getattr(args, name), submissions = not args.noSubmissions, comments = not args.noComments, before = args.before, after = args.after)
@classmethod
def from_args(cls, args):
return cls._construct(args, getattr(args, name_), submissions = not args.noSubmissions, comments = not args.noComments, before = args.before, after = args.after)
Scraper.__name__ = f'Reddit{name_.capitalize()}Scraper'
Scraper.__qualname__ = Scraper.__name__
globals()[Scraper.__name__] = Scraper
_make_scraper('user', lambda x: re.match('^[A-Za-z0-9_-]{3,20}$', x), 'author') class RedditUserScraper(RedditScraper):
_make_scraper('subreddit', lambda x: re.match('^[A-Za-z0-9][A-Za-z0-9_]{2,20}$', x), 'subreddit') name = 'reddit-user'
_make_scraper('search', lambda x: True, 'q') _validationFunc = lambda x: re.match('^[A-Za-z0-9_-]{3,20}$', x)
_apiField = 'author'
class RedditSubredditScraper(RedditScraper):
name = 'reddit-subreddit'
_validationFunc = lambda x: re.match('^[A-Za-z0-9][A-Za-z0-9_]{2,20}$', x)
_apiField = 'subreddit'
class RedditSearchScraper(RedditScraper):
name = 'reddit-search'
_validationFunc = lambda x: True
_apiField = 'q'