58 lines
1.9 KiB
Python
58 lines
1.9 KiB
Python
"""Contains some ActivityPub related utils."""
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from typing import Optional
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from typing import Dict
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from typing import List
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from typing import Any
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from .errors import RecursionLimitExceededError
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from .errors import UnexpectedActivityTypeError
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from .remote_object import OBJECT_FETCHER
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def parse_collection(
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payload: Optional[Dict[str, Any]] = None,
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url: Optional[str] = None,
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level: int = 0,
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) -> List[Any]:
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"""Resolve/fetch a `Collection`/`OrderedCollection`."""
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if level > 3:
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raise RecursionLimitExceededError('recursion limit exceeded')
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# Go through all the pages
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out: List[Any] = []
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if url:
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payload = OBJECT_FETCHER.fetch(url)
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if not payload:
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raise ValueError('must at least prove a payload or an URL')
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if payload['type'] in ['Collection', 'OrderedCollection']:
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if 'orderedItems' in payload:
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return payload['orderedItems']
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if 'items' in payload:
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return payload['items']
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if 'first' in payload:
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if 'orderedItems' in payload['first']:
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out.extend(payload['first']['orderedItems'])
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if 'items' in payload['first']:
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out.extend(payload['first']['items'])
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n = payload['first'].get('next')
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if n:
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out.extend(parse_collection(url=n, level=level+1))
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return out
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while payload:
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if payload['type'] in ['CollectionPage', 'OrderedCollectionPage']:
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if 'orderedItems' in payload:
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out.extend(payload['orderedItems'])
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if 'items' in payload:
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out.extend(payload['items'])
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n = payload.get('next')
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if n is None:
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break
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payload = OBJECT_FETCHER.fetch(n)
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else:
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raise UnexpectedActivityTypeError('unexpected activity type {}'.format(payload['type']))
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return out
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