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construct/modules/m_rooms.cc
2018-12-06 19:20:30 -08:00

433 lines
9.2 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 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.
namespace ircd::m::rooms
{
static string_view make_state_key(const mutable_buffer &out, const m::room::id &);
static m::room::id::buf unmake_state_key(const string_view &);
extern "C" event::id::buf _summary_set(const m::room::id &, const json::object &);
extern "C" std::pair<size_t, std::string> _fetch_update_(const net::hostport &, const string_view &since, const size_t &limit, const seconds &timeout);
extern "C" std::pair<size_t, std::string> _fetch_update(const net::hostport &, const string_view &since = {});
extern conf::item<size_t> fetch_limit;
extern conf::item<seconds> fetch_timeout;
static void remote_summary_chunk(const m::room &room, json::stack::object &obj);
static void local_summary_chunk(const m::room &room, json::stack::object &obj);
extern "C" void _summary_chunk(const m::room &room, json::stack::object &obj);
extern "C" size_t _count_public(const string_view &server);
extern "C" bool _for_each_public(const string_view &room_id_lb, const room::id::closure_bool &);
extern "C" bool _for_each(const string_view &room_id_lb, const room::id::closure_bool &);
static void create_public_room(const m::event &, m::vm::eval &);
extern m::hookfn<vm::eval &> create_public_room_hook;
extern const room::id::buf public_room_id;
}
ircd::mapi::header
IRCD_MODULE
{
"Matrix rooms interface; modular components"
};
decltype(ircd::m::rooms::public_room_id)
ircd::m::rooms::public_room_id
{
"public", ircd::my_host()
};
/// Create the public rooms room during initial database bootstrap.
/// This hooks the creation of the !ircd room which is a fundamental
/// event indicating the database has just been created.
decltype(ircd::m::rooms::create_public_room_hook)
ircd::m::rooms::create_public_room_hook
{
create_public_room,
{
{ "_site", "vm.effect" },
{ "room_id", "!ircd" },
{ "type", "m.room.create" },
}
};
void
ircd::m::rooms::create_public_room(const m::event &,
m::vm::eval &)
{
m::create(public_room_id, m::me.user_id);
}
bool
ircd::m::rooms::_for_each(const string_view &room_id_lb,
const room::id::closure_bool &closure)
{
const room::state state
{
my_room
};
const room::state::keys_bool keys{[&closure]
(const string_view &room_id) -> bool
{
return closure(room_id);
}};
return state.for_each("ircd.room", room_id_lb, keys);
}
size_t
ircd::m::rooms::_count_public(const string_view &server)
{
size_t ret{0};
const auto count{[&ret]
(const m::room::id &room_id)
{
++ret;
return true;
}};
for_each_public(server, count);
return ret;
}
bool
ircd::m::rooms::_for_each_public(const string_view &key,
const room::id::closure_bool &closure)
{
const room::state state
{
public_room_id
};
const bool is_room_id
{
m::valid(m::id::ROOM, key)
};
char state_key_buf[256];
const auto state_key
{
is_room_id?
make_state_key(state_key_buf, key):
key
};
const string_view &server
{
is_room_id?
room::id(key).host():
key
};
const room::state::keys_bool keys{[&closure, &server]
(const string_view &state_key) -> bool
{
const auto room_id
{
unmake_state_key(state_key)
};
if(server && room_id.host() != server)
return false;
return closure(room_id);
}};
return state.for_each("ircd.rooms", state_key, keys);
}
void
ircd::m::rooms::_summary_chunk(const m::room &room,
json::stack::object &obj)
{
return exists(room)?
local_summary_chunk(room, obj):
remote_summary_chunk(room, obj);
}
void
ircd::m::rooms::remote_summary_chunk(const m::room &room,
json::stack::object &obj)
{
const m::room publix
{
public_room_id
};
char state_key_buf[256];
const auto state_key
{
make_state_key(state_key_buf, room.room_id)
};
publix.get("ircd.rooms", state_key, [&obj]
(const m::event &event)
{
const json::object &summary
{
json::at<"content"_>(event)
};
for(const auto &member : summary)
json::stack::member m{obj, member.first, member.second};
});
}
void
ircd::m::rooms::local_summary_chunk(const m::room &room,
json::stack::object &obj)
{
static const event::keys keys
{
event::keys::include
{
"content",
}
};
const m::event::fetch::opts fopts
{
keys, room.fopts? room.fopts->gopts : db::gopts{}
};
const m::room::state state
{
room, &fopts
};
// Closure over boilerplate primary room state queries; i.e matrix
// m.room.$type events with state key "" where the content is directly
// presented to the closure.
const auto query{[&state]
(const string_view &type, const string_view &content_key, const auto &closure)
{
state.get(std::nothrow, type, "", [&content_key, &closure]
(const m::event &event)
{
const auto &content(json::get<"content"_>(event));
const auto &value(unquote(content.get(content_key)));
closure(value);
});
}};
// Aliases array
{
json::stack::member aliases_m{obj, "aliases"};
json::stack::array array{aliases_m};
state.for_each("m.room.aliases", [&array]
(const m::event &event)
{
const json::array aliases
{
json::get<"content"_>(event).get("aliases")
};
for(const string_view &alias : aliases)
array.append(unquote(alias));
});
}
query("m.room.avatar_url", "url", [&obj]
(const string_view &value)
{
json::stack::member
{
obj, "avatar_url", value
};
});
query("m.room.canonical_alias", "alias", [&obj]
(const string_view &value)
{
json::stack::member
{
obj, "canonical_alias", value
};
});
query("m.room.guest_access", "guest_access", [&obj]
(const string_view &value)
{
json::stack::member
{
obj, "guest_can_join", json::value
{
value == "can_join"
}
};
});
query("m.room.name", "name", [&obj]
(const string_view &value)
{
json::stack::member
{
obj, "name", value
};
});
// num_join_members
{
const m::room::members members{room};
json::stack::member
{
obj, "num_joined_members", json::value
{
long(members.count("join"))
}
};
}
// room_id
{
json::stack::member
{
obj, "room_id", room.room_id
};
}
query("m.room.topic", "topic", [&obj]
(const string_view &value)
{
json::stack::member
{
obj, "topic", value
};
});
query("m.room.history_visibility", "history_visibility", [&obj]
(const string_view &value)
{
json::stack::member
{
obj, "world_readable", json::value
{
value == "world_readable"
}
};
});
}
decltype(ircd::m::rooms::fetch_timeout)
ircd::m::rooms::fetch_timeout
{
{ "name", "ircd.m.rooms.fetch.timeout" },
{ "default", 45L /* matrix.org :-/ */ },
};
decltype(ircd::m::rooms::fetch_limit)
ircd::m::rooms::fetch_limit
{
{ "name", "ircd.m.rooms.fetch.limit" },
{ "default", 64L },
};
std::pair<size_t, std::string>
ircd::m::rooms::_fetch_update(const net::hostport &hp,
const string_view &since)
{
return _fetch_update_(hp, since, size_t(fetch_limit), seconds(fetch_timeout));
}
std::pair<size_t, std::string>
ircd::m::rooms::_fetch_update_(const net::hostport &hp,
const string_view &since,
const size_t &limit,
const seconds &timeout)
{
m::v1::public_rooms::opts opts;
opts.limit = limit;
opts.since = since;
opts.include_all_networks = true;
opts.dynamic = true;
// Buffer for headers and send content only; received content is dynamic
const unique_buffer<mutable_buffer> buf
{
16_KiB
};
m::v1::public_rooms request
{
hp, buf, std::move(opts)
};
request.wait(timeout);
const auto code
{
request.get()
};
const json::object &response
{
request
};
const json::array &chunk
{
response.get("chunk")
};
for(const json::object &summary : chunk)
{
const m::room::id &room_id
{
unquote(summary.at("room_id"))
};
_summary_set(room_id, summary);
}
return
{
response.get("total_room_count_estimate", 0UL),
unquote(response.get("next_batch", string_view{}))
};
}
ircd::m::event::id::buf
ircd::m::rooms::_summary_set(const m::room::id &room_id,
const json::object &summary)
{
char state_key_buf[256];
const auto state_key
{
make_state_key(state_key_buf, room_id)
};
return send(public_room_id, m::me, "ircd.rooms", state_key, summary);
}
ircd::m::room::id::buf
ircd::m::rooms::unmake_state_key(const string_view &key)
{
const auto s
{
split(key, '!')
};
return m::room::id::buf
{
s.second, s.first
};
}
ircd::string_view
ircd::m::rooms::make_state_key(const mutable_buffer &buf,
const m::room::id &room_id)
{
mutable_buffer out{buf};
consume(out, copy(out, room_id.host()));
consume(out, copy(out, room_id.local()));
return string_view
{
data(buf), data(out)
};
}