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ircd:Ⓜ️:room: Optimize the room::membership query fix.

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This commit is contained in:
Jason Volk 2018-06-02 22:18:45 -07:00
parent 6356f62de2
commit 7743198601
1 changed files with 31 additions and 14 deletions
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45
ircd/m/room.cc
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@ -192,36 +192,53 @@ ircd::m::room::membership(const mutable_buffer &out,
const m::id::user &user_id)
const
{
static const event::keys keys
static const event::keys membership_keys
{
event::keys::include
{
"membership",
"content"
}
event::keys::include{"membership"}
};
// Since this is a member function of m::room there might be a supplied
// fopts. Whatever keys it has are irrelevant, but we can preserve gopts.
const m::event::fetch::opts fopts
{
keys, this->fopts? this->fopts->gopts : db::gopts{}
};
const state state
{
*this, &fopts
membership_keys, this->fopts? this->fopts->gopts : db::gopts{}
};
string_view ret;
state.get(std::nothrow, "m.room.member"_sv, user_id, [&out, &ret]
const auto result_closure{[&out, &ret]
(const m::event &event)
{
ret =
{
data(out), copy(out, m::membership(event))
};
});
}};
const room::state state{*this, &fopts};
const bool exists
{
state.get(std::nothrow, "m.room.member"_sv, user_id, result_closure)
};
// This branch is taken when the event exists but the event.membership had
// no value. Due to wanton protocol violations event.membership may be
// jsundefined and only event.content.membership will exist in event. This
// is a rare case so both queries are optimized to only seek for their key.
if(exists && !ret)
{
static const event::keys content_membership_keys
{
event::keys::include{"content"}
};
const m::event::fetch::opts fopts
{
content_membership_keys, this->fopts? this->fopts->gopts : db::gopts{}
};
const room::state state{*this, &fopts};
state.get(std::nothrow, "m.room.member"_sv, user_id, result_closure);
}
return ret;
}