674 lines
11 KiB
C++
674 lines
11 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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decltype(ircd::m::room::events::viewport_size)
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ircd::m::room::events::viewport_size
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{
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{ "name", "ircd.m.room.events.viewport.size" },
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{ "default", 48L },
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};
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std::pair<int64_t, ircd::m::event::idx>
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ircd::m::viewport(const room &room)
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{
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std::pair<int64_t, m::event::idx> ret
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{
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-1, 0
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};
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m::room::events it
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{
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room
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};
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const ssize_t &max
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{
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room::events::viewport_size
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};
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for(auto i(0); it && i < max; --it, ++i)
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{
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ret.first = it.depth();
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ret.second = it.event_idx();
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}
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return ret;
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}
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std::pair<int64_t, ircd::m::event::idx>
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ircd::m::twain(const room &room)
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{
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std::pair<int64_t, m::event::idx> ret
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{
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-1, 0
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};
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const room::events::sounding s
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{
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room
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};
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s.rfor_each([&ret]
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(const auto &range, const auto &event_idx)
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{
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ret.first = range.first - 1;
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ret.second = 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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std::pair<int64_t, ircd::m::event::idx>
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ircd::m::sounding(const room &room)
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{
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std::pair<int64_t, m::event::idx> ret
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{
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-1, 0
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};
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const room::events::sounding s
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{
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room
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};
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s.rfor_each([&ret]
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(const auto &range, const auto &event_idx)
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{
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ret.first = range.second;
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ret.second = 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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std::pair<int64_t, ircd::m::event::idx>
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ircd::m::hazard(const room &room)
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{
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std::pair<int64_t, m::event::idx> ret
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{
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0, 0
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};
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const room::events::sounding s
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{
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room
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};
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s.for_each([&ret]
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(const auto &range, const auto &event_idx)
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{
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ret.first = range.first;
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ret.second = 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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//
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// room::events
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//
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size_t
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ircd::m::room::events::count(const m::event::idx_range &range)
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{
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const auto &[a, b]
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{
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range
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};
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// Get the room_id from b here; a might not be in the same room but downstream
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// the counter seeks to a in the given room and will properly fail there.
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room::id::buf room_id
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{
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m::get(std::min(a, b), "room_id", room_id)
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};
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return count(room_id, range);
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}
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size_t
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ircd::m::room::events::count(const m::room &room,
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const m::event::idx_range &range)
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{
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const auto &[a, b]
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{
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range
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};
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m::room::events it
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{
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room
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};
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assert(a <= b);
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it.seek_idx(a);
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if(!it && !exists(room))
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throw m::NOT_FOUND
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{
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"Cannot find room '%s' to count events in",
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string_view{room.room_id}
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};
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else if(!it)
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throw m::NOT_FOUND
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{
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"Event @ idx:%lu or idx:%lu not found in room '%s' or at all",
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a,
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b,
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string_view{room.room_id}
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};
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size_t ret{0};
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// Hit the iterator once first otherwise the count will always increment
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// to `1` erroneously when it ought to show `0`.
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for(++it; it && it.event_idx() < b; ++it, ++ret);
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return ret;
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}
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size_t
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ircd::m::room::events::prefetch_viewport(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
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};
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const event::fetch::opts &fopts
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{
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room.fopts?
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*room.fopts:
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event::fetch::default_opts
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};
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ssize_t i(0), ret(0);
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for(; it && i < viewport_size; --it, ++i)
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{
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const auto &event_idx(it.event_idx());
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ret += m::prefetch(event_idx, fopts);
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}
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return ret;
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}
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size_t
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ircd::m::room::events::prefetch(const m::room &room,
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const depth_range &range)
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{
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m::room::events it
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{
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room, std::max(range.first, range.second)
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};
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const event::fetch::opts &fopts
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{
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room.fopts?
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*room.fopts:
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event::fetch::default_opts
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};
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ssize_t i(0), ret(0);
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for(; it && i < viewport_size; --it, ++i)
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{
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const auto &depth(it.depth());
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const auto &event_idx(it.event_idx());
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ret += m::prefetch(event_idx, fopts);
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if(depth <= std::min(range.first, range.second))
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break;
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}
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return ret;
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}
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bool
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ircd::m::room::events::preseek(const m::room &room,
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const uint64_t &depth)
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{
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char buf[dbs::ROOM_EVENTS_KEY_MAX_SIZE];
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const string_view key
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{
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depth != uint64_t(-1)?
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dbs::room_events_key(buf, room.room_id, depth):
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string_view{room.room_id}
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};
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return db::prefetch(dbs::room_events, key);
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}
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//
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// room::events::events
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//
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ircd::m::room::events::events(const m::room &room,
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const event::fetch::opts *const &fopts)
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:room{room}
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,_event
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{
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fopts?
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*fopts:
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room.fopts?
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*room.fopts:
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event::fetch::default_opts
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}
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{
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assert(room.room_id);
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if(room.event_id)
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seek(room.event_id);
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else
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seek();
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}
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ircd::m::room::events::events(const m::room &room,
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const event::id &event_id,
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const event::fetch::opts *const &fopts)
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:room{room}
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,_event
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{
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fopts?
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*fopts:
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room.fopts?
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*room.fopts:
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event::fetch::default_opts
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}
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{
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assert(room.room_id);
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seek(event_id);
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}
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ircd::m::room::events::events(const m::room &room,
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const uint64_t &depth,
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const event::fetch::opts *const &fopts)
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:room{room}
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,_event
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{
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fopts?
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*fopts:
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room.fopts?
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*room.fopts:
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event::fetch::default_opts
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}
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{
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assert(room.room_id);
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// As a special convenience for the ctor only, if the depth=0 and
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// nothing is found another attempt is made for depth=1 for synapse
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// rooms which start at depth=1.
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if(!seek(depth) && depth == 0)
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seek(1);
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}
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bool
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ircd::m::room::events::prefetch()
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{
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assert(_event.fopts);
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return m::prefetch(event_idx(), *_event.fopts);
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}
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bool
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ircd::m::room::events::prefetch(const string_view &event_prop)
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{
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return m::prefetch(event_idx(), event_prop);
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}
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const ircd::m::event &
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ircd::m::room::events::fetch()
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{
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m::seek(_event, event_idx());
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return _event;
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}
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const ircd::m::event &
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ircd::m::room::events::fetch(std::nothrow_t)
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{
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m::seek(_event, event_idx(), std::nothrow);
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return _event;
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}
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const ircd::m::event &
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ircd::m::room::events::operator*()
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{
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return fetch(std::nothrow);
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};
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bool
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ircd::m::room::events::preseek(const uint64_t &depth)
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{
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char buf[dbs::ROOM_EVENTS_KEY_MAX_SIZE];
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const string_view key
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{
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depth != uint64_t(-1)?
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dbs::room_events_key(buf, room.room_id, depth):
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room.room_id
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};
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return db::prefetch(dbs::room_events, key);
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}
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bool
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ircd::m::room::events::seek(const event::id &event_id)
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{
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const event::idx &event_idx
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{
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m::index(std::nothrow, event_id)
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};
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return event_idx?
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seek_idx(event_idx):
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false;
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}
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bool
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ircd::m::room::events::seek(const uint64_t &depth)
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{
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char buf[dbs::ROOM_EVENTS_KEY_MAX_SIZE];
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const string_view seek_key
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{
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depth != uint64_t(-1)?
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dbs::room_events_key(buf, room.room_id, depth):
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room.room_id
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};
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this->it = dbs::room_events.begin(seek_key);
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return bool(*this);
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}
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bool
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ircd::m::room::events::seek_idx(const event::idx &event_idx)
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try
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{
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uint64_t depth(0);
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if(event_idx)
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m::get(event_idx, "depth", mutable_buffer
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{
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reinterpret_cast<char *>(&depth), sizeof(depth)
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});
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char buf[dbs::ROOM_EVENTS_KEY_MAX_SIZE];
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const auto &seek_key
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{
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dbs::room_events_key(buf, room.room_id, depth, event_idx)
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};
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this->it = dbs::room_events.begin(seek_key);
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if(!bool(*this))
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return false;
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// Check if this event_idx is actually in this room
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if(event_idx && event_idx != this->event_idx())
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return false;
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return true;
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}
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catch(const db::not_found &e)
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{
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return false;
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}
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ircd::m::room::events::operator
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ircd::m::event::idx()
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const
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{
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return event_idx();
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}
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ircd::m::event::idx
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ircd::m::room::events::event_idx()
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const
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{
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assert(bool(*this));
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const auto part
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{
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dbs::room_events_key(it->first)
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};
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return std::get<1>(part);
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}
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uint64_t
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ircd::m::room::events::depth()
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const
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{
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assert(bool(*this));
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const auto part
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{
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dbs::room_events_key(it->first)
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};
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return std::get<0>(part);
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}
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//
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// room::events::missing
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//
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size_t
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ircd::m::room::events::missing::count()
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const
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{
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size_t ret{0};
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for_each([&ret]
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(const auto &event_id, const auto &depth, const auto &event_idx)
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{
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++ret;
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return true;
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});
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return ret;
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}
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bool
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ircd::m::room::events::missing::for_each(const closure &closure)
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const
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{
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return for_each(0L, closure);
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}
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bool
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ircd::m::room::events::missing::for_each(const int64_t &min_depth,
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const closure &closure)
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const
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{
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bool ret{true};
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room::events it
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{
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room
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};
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for(; it && ret; --it)
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{
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if(int64_t(it.depth()) < min_depth)
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break;
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const m::event &event{*it};
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const m::event::prev prev{event};
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ret = m::for_each(prev, [&](const m::event::id &event_id)
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{
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if(m::exists(event_id))
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return true;
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if(!closure(event_id, it.depth(), it.event_idx()))
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return false;
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return true;
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});
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}
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return ret;
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}
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//
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// room::events::sounding
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//
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bool
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ircd::m::room::events::sounding::rfor_each(const closure &closure)
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const
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{
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room::events it
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{
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room
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};
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if(!it)
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return true;
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event::idx idx{0};
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for(sounding::range range{0L, it.depth()}; it; --it)
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{
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range.first = it.depth();
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if(range.first == range.second)
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{
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idx = it.event_idx();
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continue;
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}
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--range.second;
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if(range.first == range.second)
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{
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idx = it.event_idx();
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continue;
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}
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if(!closure({range.first+1, range.second+1}, idx))
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return false;
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range.second = range.first;
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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::events::sounding::for_each(const closure &closure)
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const
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{
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room::events it
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{
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room, int64_t(0L)
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};
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for(sounding::range range{0L, 0L}; it; ++it)
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{
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range.second = it.depth();
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if(range.first == range.second)
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continue;
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++range.first;
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if(range.first == range.second)
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continue;
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if(!closure(range, it.event_idx()))
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return false;
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range.first = range.second;
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}
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return true;
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}
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//
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// room::events::horizon
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//
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//TODO: XXX remove fwd decl
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namespace ircd::m::dbs
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{
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void _index_event_horizon(db::txn &, const event &, const write_opts &, const m::event::id &);
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}
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size_t
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ircd::m::room::events::horizon::rebuild()
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{
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m::dbs::write_opts opts;
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opts.appendix.reset();
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opts.appendix.set(dbs::appendix::EVENT_HORIZON);
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db::txn txn
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{
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*dbs::events
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};
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size_t ret(0);
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m::room::events it
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{
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room
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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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const event::prev prev_events{event};
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opts.event_idx = it.event_idx();
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m::for_each(prev_events, [&]
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(const m::event::id &event_id)
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{
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if(m::exists(event_id))
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return true;
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m::dbs::_index_event_horizon(txn, event, opts, event_id);
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++ret;
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return true;
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});
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}
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txn();
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return ret;
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}
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size_t
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ircd::m::room::events::horizon::count()
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const
|
|
{
|
|
size_t ret{0};
|
|
for_each([&ret]
|
|
(const auto &event_id, const auto &depth, const auto &event_idx)
|
|
{
|
|
++ret;
|
|
return true;
|
|
});
|
|
|
|
return ret;
|
|
}
|
|
|
|
bool
|
|
ircd::m::room::events::horizon::for_each(const closure &closure)
|
|
const
|
|
{
|
|
const std::function<bool (const string_view &)> in_room
|
|
{
|
|
[this](const string_view &room_id)
|
|
{
|
|
return room_id == this->room.room_id;
|
|
}
|
|
};
|
|
|
|
return event::horizon::for_every([&in_room, &closure]
|
|
(const event::id &event_id, const event::idx &event_idx)
|
|
{
|
|
if(!m::query(event_idx, "room_id", false, in_room))
|
|
return true;
|
|
|
|
if(m::exists(event_id))
|
|
return true;
|
|
|
|
uint64_t depth;
|
|
if(!m::get(event_idx, "depth", depth))
|
|
return true;
|
|
|
|
if(!closure(event_id, depth, event_idx))
|
|
return false;
|
|
|
|
return true;
|
|
});
|
|
}
|