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state-res: Make logic a bit easier to read

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This commit is contained in:
Jonas Platte 2021-09-04 01:33:10 +02:00
parent d8637d3b30
commit d1fa58abb2
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1 changed files with 21 additions and 15 deletions
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36
crates/ruma-state-res/src/event_auth.rs
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@ -395,15 +395,19 @@ fn valid_membership_change<E: Event>(
let power_levels_event = power_levels_event.as_ref();
let join_rules_event = join_rules_event.as_ref();
let sender_membership =
sender_membership_event.map_or(Ok::<_, Error>(MembershipState::Leave), |pdu| {
Ok(serde_json::from_value::<MembershipState>(
pdu.content()
.get("membership")
.expect("we assume existing events are valid")
.clone(),
)?)
})?;
let sender_is_joined = {
let sender_membership =
sender_membership_event.map_or(Ok::<_, Error>(MembershipState::Leave), |pdu| {
Ok(serde_json::from_value::<MembershipState>(
pdu.content()
.get("membership")
.expect("we assume existing events are valid")
.clone(),
)?)
})?;
sender_membership == MembershipState::Join
};
let target_user_current_membership =
target_user_membership_event.map_or(Ok::<_, Error>(MembershipState::Leave), |pdu| {
@ -420,9 +424,11 @@ fn valid_membership_change<E: Event>(
None => PowerLevelsEventContent::default(),
};
let sender_power = power_levels.users.get(sender).or_else(|| {
(sender_membership == MembershipState::Join).then(|| &power_levels.users_default)
});
let sender_power = power_levels
.users
.get(sender)
.or_else(|| sender_is_joined.then(|| &power_levels.users_default));
let target_power = power_levels.users.get(target_user).or_else(|| {
(target_membership == MembershipState::Join).then(|| &power_levels.users_default)
});
@ -482,7 +488,7 @@ fn valid_membership_change<E: Event>(
}
allow
}
} else if sender_membership != MembershipState::Join
} else if !sender_is_joined
|| target_user_current_membership == MembershipState::Join
|| target_user_current_membership == MembershipState::Ban
{
@ -513,7 +519,7 @@ fn valid_membership_change<E: Event>(
);
}
allow
} else if sender_membership != MembershipState::Join
} else if !sender_is_joined
|| target_user_current_membership == MembershipState::Ban
&& sender_power.filter(|&p| p < &power_levels.ban).is_some()
{
@ -534,7 +540,7 @@ fn valid_membership_change<E: Event>(
allow
}
} else if target_membership == MembershipState::Ban {
if sender_membership != MembershipState::Join {
if !sender_is_joined {
warn!(
"Can't ban user if sender is not joined\nSender user state: {:?}",
sender_membership_event.map(|e| e.event_id())