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Send history visibility on boundary changes
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1 changed files with 26 additions and 0 deletions
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@ -29,6 +29,14 @@ import logging
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logger = logging.getLogger(__name__)
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VISIBILITY_PRIORITY = (
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"world_readable",
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"shared",
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"invited",
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"joined",
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)
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class BaseHandler(object):
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"""
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Common base class for the event handlers.
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@ -85,10 +93,28 @@ class BaseHandler(object):
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else:
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visibility = "shared"
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if visibility not in VISIBILITY_PRIORITY:
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visibility = "shared"
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# if it was world_readable, it's easy: everyone can read it
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if visibility == "world_readable":
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return True
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# Always allow history visibility events on boundaries. This is done
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# by setting the effective visibility to the least restrictive
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# of the old vs new.
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if event.type == EventTypes.RoomHistoryVisibility:
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prev_content = event.unsigned.get("prev_content", {})
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prev_visibility = prev_content.get("history_visibility", None)
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if prev_visibility not in VISIBILITY_PRIORITY:
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prev_visibility = "shared"
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new_priority = VISIBILITY_PRIORITY.index(visibility)
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old_priority = VISIBILITY_PRIORITY.index(prev_visibility)
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if old_priority < new_priority:
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visibility = prev_visibility
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# get the user's membership at the time of the event. (or rather,
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# just *after* the event. Which means that people can see their
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# own join events, but not (currently) their own leave events.)
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