Prakhar Pratyush 83bbd8c767 user_topics: Update 'do_update_message' to handle 'merge userTopic states'. ...

This commit updates the logic for migrating user_topic rows
during the move-messages operation when the target topic
already has messages.

Previously, the target_topic's visibility_policy was simply
set to the original_topic's visibility_policy,
and the original_topic's visibility_policy was set to INHERIT.

This commit updates the move-messages code path to determine
the new visibility_policy depending on the visibility policies
of the original and target topics.
The target_topic's visibility_policy is then updated.

The number of db queries has increased by two:
One query corresponds to determining if 'target_topic_has_messages'.
Another query corresponds to 'get_users_with_user_topic_visibility_policy'
to determine 'target_topic_user_profile_to_visibility_policy'.

2023-04-18 16:40:57 -07:00

173 KiB

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