mirror of
https://github.com/matrix-construct/construct
synced 2024-08-25 11:02:08 +02:00
158 lines
3.3 KiB
C++
158 lines
3.3 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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ircd::mapi::header
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IRCD_MODULE
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{
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"Client Sync :Presence"
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};
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namespace ircd::m::sync
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{
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static bool presence_polylog(data &);
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static bool presence_linear(data &);
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extern item presence;
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}
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decltype(ircd::m::sync::presence)
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ircd::m::sync::presence
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{
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"presence",
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presence_polylog,
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presence_linear,
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};
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bool
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ircd::m::sync::presence_linear(data &data)
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{
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if(!data.event_idx)
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return false;
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assert(data.event);
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const m::event &event{*data.event};
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if(json::get<"type"_>(event) != "ircd.presence")
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return false;
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if(!my_host(json::get<"origin"_>(event)))
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return false;
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json::stack::array array
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{
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*data.out, "events"
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};
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json::stack::object object
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{
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*data.out
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};
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// sender
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json::stack::member
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{
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*data.out, "sender", unquote(at<"content"_>(event).get("user_id"))
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};
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// type
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json::stack::member
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{
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*data.out, "type", json::value{"m.presence"}
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};
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// content
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json::stack::member
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{
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*data.out, "content", at<"content"_>(event)
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};
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return true;
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}
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bool
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ircd::m::sync::presence_polylog(data &data)
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{
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json::stack::array array
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{
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*data.out, "events"
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};
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bool ret{false};
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ctx::mutex mutex;
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const auto append_event{[&data, &array, &mutex, &ret]
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(const json::object &event)
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{
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// Lock the json::stack for the append operations. This mutex will only be
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// contended during a json::stack flush to the client; not during database
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// queries leading to this.
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const std::lock_guard<decltype(mutex)> l{mutex};
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ret = true;
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json::stack::object object
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{
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array
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};
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// sender
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json::stack::member
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{
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object, "sender", unquote(event.get("user_id"))
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};
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// type
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json::stack::member
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{
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object, "type", json::value{"m.presence"}
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};
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// content
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json::stack::member
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{
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object, "content", event
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};
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}};
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// Setup for parallelization.
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static const size_t fibers(64); //TODO: conf
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using buffer = std::array<char[m::id::MAX_SIZE+1], fibers>;
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const auto buf(std::make_unique<buffer>());
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std::array<string_view, fibers> q;
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ctx::parallel<string_view> parallel
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{
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m::sync::pool, q, [&data, &append_event]
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(const m::user::id user_id)
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{
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const event::idx event_idx
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{
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m::presence::get(std::nothrow, user_id)
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};
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if(apropos(data, event_idx))
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m::get(std::nothrow, event_idx, "content", append_event);
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}
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};
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// Iterate all of the users visible to our user in joined rooms.
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const m::user::mitsein mitsein{data.user};
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mitsein.for_each("join", [¶llel, &q, &buf]
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(const m::user &user)
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{
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// Manual copy of the user_id string to the buffer and assignment
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// of q at the next position. parallel.snd is the position in q
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// which ctx::parallel wants us to store the next data at. The
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// parallel() call doesn't return (blocks this context) until there's
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// a next position available; propagating flow-control for the iter.
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const auto pos(parallel.nextpos());
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q[pos] = strlcpy(buf->at(pos), user.user_id);
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parallel();
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});
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return ret;
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}
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