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4e7fce60ee
We now triage message content for possible mentions before going to the cache/DB to get name info. This will create an extra data hop for messages with mentions, but it will save a fairly expensive cache lookup for most messages. (This will be especially helpful for large realms.) [Note that we need a subsequent commit to actually make the speedup happen here, since avatars also cause us to look up all users in the realm.]
34 lines
876 B
Python
34 lines
876 B
Python
from __future__ import absolute_import
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from typing import Optional, Set, Text
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import re
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# Match multi-word string between @** ** or match any one-word
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# sequences after @
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find_mentions = r'(?<![^\s\'\"\(,:<])@(\*\*[^\*]+\*\*|all|everyone)'
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wildcards = ['all', 'everyone']
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def user_mention_matches_wildcard(mention):
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# type: (Text) -> bool
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return mention in wildcards
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def extract_name(s):
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# type: (Text) -> Optional[Text]
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if s.startswith("**") and s.endswith("**"):
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name = s[2:-2]
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if name in wildcards:
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return None
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return name
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# We don't care about @all or @everyone
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return None
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def possible_mentions(content):
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# type: (Text) -> Set[Text]
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matches = re.findall(find_mentions, content)
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names = {extract_name(match) for match in matches}
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names = {name for name in names if name}
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return names
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