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construct/modules/client/sync/rooms/summary.cc

179 lines
3.3 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2019 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.
ircd::mapi::header
IRCD_MODULE
{
"Client Sync :Room Summary"
};
namespace ircd::m::sync
{
static bool room_summary_append_counts(data &);
static bool room_summary_append_heroes(data &);
static bool room_summary_polylog(data &);
static bool room_summary_linear(data &);
extern item room_summary;
}
decltype(ircd::m::sync::room_summary)
ircd::m::sync::room_summary
{
"rooms.summary",
room_summary_polylog,
room_summary_linear,
{
{ "initial", true },
}
};
bool
ircd::m::sync::room_summary_linear(data &data)
{
if(!data.event_idx)
return false;
if(!data.membership)
return false;
if(!data.room)
return false;
assert(data.event);
if(at<"type"_>(*data.event) != "m.room.member")
return false;
const auto &room{*data.room};
const m::room::members members
{
room
};
json::stack::object rooms
{
*data.out, "rooms"
};
json::stack::object membership_
{
*data.out, data.membership
};
json::stack::object room_
{
*data.out, data.room->room_id
};
json::stack::object summary
{
*data.out, "summary"
};
bool ret{false};
ret |= room_summary_append_counts(data);
ret |= room_summary_append_heroes(data);
return ret;
}
bool
ircd::m::sync::room_summary_polylog(data &data)
{
bool ret{false};
ret |= room_summary_append_counts(data);
ret |= room_summary_append_heroes(data);
return ret;
}
bool
ircd::m::sync::room_summary_append_heroes(data &data)
{
json::stack::array m_heroes
{
*data.out, "m.heroes"
};
static const auto count{6}, bufsz{48}, limit{12};
std::array<char[bufsz], count> buf;
std::array<string_view, count> last;
size_t ret(0), i(0);
m::room::messages it
{
*data.room
};
const auto already{[&last, &ret]
(const string_view &sender) -> bool
{
return std::any_of(begin(last), begin(last)+ret, [&sender]
(const auto &last)
{
return startswith(last, sender);
});
}};
for(; it && ret < count && i < limit; --it, ++i)
{
const auto &event_idx(it.event_idx());
m::get(std::nothrow, event_idx, "sender", [&]
(const auto &sender)
{
if(already(sender))
return;
m_heroes.append(sender);
last.at(ret) = strlcpy(buf.at(ret), sender);
++ret;
});
};
return ret;
}
bool
ircd::m::sync::room_summary_append_counts(data &data)
{
const m::room::members members
{
*data.room
};
const auto joined_members_count
{
members.count("join")
};
json::stack::member
{
*data.out, "m.joined_member_count", json::value
{
long(joined_members_count)
}
};
// TODO: XXX
// Invited member count is omitted for now. We don't yet enjoy an
// optimized query for the invited member count like we do with the
// joined member count.
const long invited_members_count
{
0UL
};
// json::stack::member
// {
// *data.out, "m.invited_member_count", json::value
// {
// long(members.count("invite"))
// }
// };
return joined_members_count || invited_members_count;
}