mirror of
https://github.com/matrix-construct/construct
synced 2024-11-16 15:00:51 +01:00
152 lines
2.5 KiB
C++
152 lines
2.5 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) 2016-2019 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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"Matrix room library; timeline modular components."
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};
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uint64_t
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ircd::m::latency(const room::timeline &a,
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const room::timeline &b)
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{
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return 0UL;
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}
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//
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// room::timeline::timeline
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//
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ircd::m::room::timeline::timeline(const m::room &room)
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:room{room}
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{
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}
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bool
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ircd::m::room::timeline::for_each(const closure &closure)
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const
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{
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struct coord coord;
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return for_each(coord, closure);
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}
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bool
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ircd::m::room::timeline::for_each(coord &coord,
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const closure &closure)
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const
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{
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events it
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{
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this->room, uint64_t(coord.y)
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};
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if(!it)
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return true;
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event::idx next(it.event_idx()); do
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{
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const auto last(coord);
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coord = closure(coord, next);
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if(coord.x == last.x && coord.y == last.y)
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return true;
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if(coord.y != last.y)
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if(!it.seek(coord.y))
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return true;
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next = timeline::next(it.event_idx(), coord.x);
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if(next == 0 && coord.x == 0)
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continue;
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if(next == it.event_idx())
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return false;
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if(next == 0)
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coord.x = 0;
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}
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while(1);
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return true;
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}
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bool
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ircd::m::room::timeline::has_future(const event::id &event_id)
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const
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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::room::timeline::has_past(const event::id &event_id)
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const
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{
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return true;
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}
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//
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// static util
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//
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void
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ircd::m::room::timeline::rebuild(const m::room &room)
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{
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m::room::events it
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{
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room, 0UL
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};
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if(!it)
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return;
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db::txn txn
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{
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*m::dbs::events
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};
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for(; it; ++it)
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{
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const m::event &event{*it};
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m::dbs::write_opts opts;
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opts.event_idx = it.event_idx();
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opts.appendix.reset();
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opts.appendix.set(dbs::appendix::EVENT_REFS);
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opts.event_refs.reset();
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opts.event_refs.set(uint(dbs::ref::NEXT));
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m::dbs::write(txn, event, opts);
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}
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txn();
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}
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ircd::m::event::idx
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ircd::m::room::timeline::next(const event::idx &event_idx,
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const int64_t &x)
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{
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const m::event::refs refs
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{
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event_idx
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};
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int64_t _x(0);
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event::idx ret(0);
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refs.for_each(dbs::ref::NEXT, [&_x, &x, &ret]
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(const auto &event_idx, const auto &)
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{
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if(_x++ < x)
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return true;
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ret = event_idx;
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return false;
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});
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return ret;
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}
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