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construct/matrix/relates.cc

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// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2022 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
bool
ircd::m::relates::prefetch(const string_view &type)
const
{
// If the prefetch was launched, bail here without blocking below.
if(refs.prefetch(dbs::ref::M_RELATES))
return true;
// The iteration is cached so we can prefetch the content now
bool ret{false};
refs.for_each(dbs::ref::M_RELATES, [this, &ret]
(const auto &event_idx, const auto &)
{
if(this->prefetch_depth)
ret |= m::prefetch(event_idx, "depth");
if(this->prefetch_sender || this->match_sender)
ret |= m::prefetch(event_idx, "sender");
ret |= m::prefetch(event_idx, "content");
return true;
});
return ret;
}
size_t
ircd::m::relates::count(const string_view &type)
const
{
size_t ret(0);
for_each(type, [&ret]
(const event::idx &, const json::object &, const m::relates_to &)
noexcept
{
++ret;
return true;
});
return ret;
}
bool
ircd::m::relates::has(const event::idx &idx)
const
{
return has(string_view{}, idx);
}
bool
ircd::m::relates::has(const string_view &type)
const
{
return !for_each(type, []
(const event::idx &, const json::object &, const m::relates_to &)
noexcept
{
return false;
});
}
bool
ircd::m::relates::has(const string_view &type,
const event::idx &idx)
const
{
return !for_each(type, [&idx]
(const event::idx &ref_idx, const json::object &, const m::relates_to &)
noexcept
{
return ref_idx != idx; // true to continue, false to break
});
}
ircd::m::event::idx
ircd::m::relates::latest(const string_view &type,
uint *const at)
const
{
if(at)
*at = -1;
uint i{0};
int64_t best{0};
event::idx ret{0};
for_each(type, [&]
(const event::idx &event_idx, const json::object &, const m::relates_to &)
noexcept
{
int64_t depth{0};
if((depth = m::get(std::nothrow, event_idx, "depth", depth)) > best)
{
best = depth;
ret = event_idx;
if(at)
*at = i;
}
++i;
return true;
});
return ret;
}
ircd::m::event::idx
ircd::m::relates::get(const string_view &type,
const uint at)
const
{
uint ctr{0};
event::idx ret{0};
for_each(type, [&at, &ctr, &ret]
(const event::idx &event_idx, const json::object &, const m::relates_to &)
noexcept
{
if(ctr++ < at)
return true;
ret = event_idx;
return false;
});
return ret;
}
bool
ircd::m::relates::_each(const string_view &rel_type,
const closure &closure,
const event::idx &event_idx)
const
{
thread_local char buf[event::MAX_SIZE];
const json::object content
{
m::get(std::nothrow, event_idx, "content", buf)
};
if(!content)
return true;
m::relates_to relates
{
content["m.relates_to"]
};
if(!json::get<"rel_type"_>(relates))
if(json::get<"m.in_reply_to"_>(relates))
json::get<"rel_type"_>(relates) = "m.in_reply_to";
if(rel_type)
if(json::get<"rel_type"_>(relates) != rel_type)
return true;
if(match_sender)
{
const pair<event::idx> idx
{
refs.idx, event_idx
};
const std::equal_to<string_view> equal_to;
if(!m::query(std::nothrow, idx, "sender", equal_to))
return true;
}
return closure(event_idx, content, relates);
}