mirror of
https://github.com/matrix-construct/construct
synced 2024-10-31 02:48:58 +01:00
358 lines
6.5 KiB
C++
358 lines
6.5 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) 2016-2018 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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using namespace ircd;
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extern "C" void default_conf(const string_view &prefix);
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extern "C" void rehash_conf(const string_view &prefix, const bool &existing);
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extern "C" void reload_conf();
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extern "C" void refresh_conf();
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static void init_conf_item(conf::item<> &);
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// This module registers with conf::on_init to be called back
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// when a conf item is initialized; when this module is unloaded
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// we have to unregister that listener using this state.
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decltype(conf::on_init)::const_iterator
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conf_on_init_iter
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{
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end(conf::on_init)
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};
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mapi::header
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IRCD_MODULE
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{
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"Server Configuration", []
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{
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conf_on_init_iter = conf::on_init.emplace(end(conf::on_init), init_conf_item);
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reload_conf();
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}, []
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{
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assert(conf_on_init_iter != end(conf::on_init));
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conf::on_init.erase(conf_on_init_iter);
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}
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};
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/// Set to false to quiet errors from a conf item failing to set
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bool
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item_error_log
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{
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true
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};
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static void
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on_run()
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{
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// Suppress errors for this scope.
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const unwind uw{[] { item_error_log = true; }};
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item_error_log = false;
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rehash_conf({}, false);
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}
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/// Waits for the daemon to transition to the RUN state so we can gather all
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/// of the registered conf items and save any new ones to the !conf room.
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/// We can't do that on this module init for two reason:
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/// - More conf items will load in other modules after this module.
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/// - Events can't be safely sent to the !conf room until the RUN state.
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const ircd::runlevel_changed
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rehash_on_run{[]
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(const auto &runlevel)
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{
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if(runlevel == ircd::runlevel::RUN)
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ctx::context
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{
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"confhash", 256_KiB, on_run, ctx::context::POST
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};
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}};
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const m::room::id::buf
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conf_room_id
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{
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"conf", ircd::my_host()
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};
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const m::room
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conf_room
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{
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conf_room_id
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};
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extern "C" m::event::id::buf
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set_conf_item(const m::user::id &sender,
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const string_view &key,
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const string_view &val)
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{
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return send(conf_room, sender, "ircd.conf.item", key,
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{
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{ "value", val }
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});
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}
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extern "C" void
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get_conf_item(const string_view &key,
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const std::function<void (const string_view &)> &closure)
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{
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static const m::event::fetch::opts fopts
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{
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m::event::keys::include
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{
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"content"
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}
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};
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const m::room::state state
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{
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conf_room, &fopts
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};
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state.get("ircd.conf.item", key, [&closure]
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(const m::event &event)
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{
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const auto &value
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{
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unquote(at<"content"_>(event).at("value"))
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};
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closure(value);
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});
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}
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static void
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conf_updated(const m::event &event)
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noexcept try
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{
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const auto &content
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{
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at<"content"_>(event)
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};
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const auto &key
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{
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at<"state_key"_>(event)
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};
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const string_view &value
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{
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unquote(content.at("value"))
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};
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if(runlevel == runlevel::START && !conf::exists(key))
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return;
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// Conf items marked with a persist=false property are not read from
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// the conf room into the item, even if the value exists in the room.
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if(conf::exists(key) && !conf::persists(key))
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return;
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log::debug
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{
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"Updating conf [%s] => %s", key, value
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};
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ircd::conf::set(key, value);
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}
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catch(const std::exception &e)
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{
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if(item_error_log) log::error
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{
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"Failed to set conf item '%s' :%s",
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json::get<"state_key"_>(event),
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e.what()
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};
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}
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static void
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handle_conf_updated(const m::event &event,
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m::vm::eval &)
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{
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conf_updated(event);
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}
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const m::hookfn<m::vm::eval &>
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conf_updated_hook
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{
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handle_conf_updated,
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{
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{ "_site", "vm.effect" },
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{ "room_id", "!conf" },
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{ "type", "ircd.conf.item" },
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}
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};
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static void
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init_conf_items()
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{
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static const m::event::fetch::opts fopts
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{
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m::event::keys::include
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{
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"content", "state_key"
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}
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};
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const m::room::state state
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{
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conf_room, &fopts
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};
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state.for_each("ircd.conf.item", []
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(const m::event &event)
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{
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conf_updated(event);
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});
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}
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static void
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init_conf_item(conf::item<> &item)
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{
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static const m::event::fetch::opts fopts
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{
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m::event::keys::include
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{
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"content", "state_key"
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}
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};
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const m::room::state state
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{
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conf_room, &fopts
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};
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state.get(std::nothrow, "ircd.conf.item", item.name, []
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(const m::event &event)
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{
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conf_updated(event);
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});
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}
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static void
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handle_init_conf_items(const m::event &,
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m::vm::eval &eval)
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{
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init_conf_items();
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}
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const m::hookfn<m::vm::eval &>
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init_conf_items_hook
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{
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handle_init_conf_items,
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{
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{ "_site", "vm.effect" },
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{ "room_id", "!ircd" },
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{ "type", "m.room.member" },
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{ "membership", "join" },
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{ "state_key", "@ircd" },
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}
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};
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static m::event::id::buf
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create_conf_item(const string_view &key,
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const conf::item<> &item)
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try
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{
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thread_local char vbuf[4_KiB];
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const string_view &val
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{
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item.get(vbuf)
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};
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return set_conf_item(m::me.user_id, key, val);
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}
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catch(const std::exception &e)
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{
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if(item_error_log) log::error
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{
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"Failed to create conf item '%s' :%s",
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key,
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e.what()
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};
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return {};
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}
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static void
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create_conf_room(const m::event &,
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m::vm::eval &)
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{
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m::create(conf_room_id, m::me.user_id);
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rehash_conf({}, true);
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}
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const m::hookfn<m::vm::eval &>
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create_conf_room_hook
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{
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create_conf_room,
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{
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{ "_site", "vm.effect" },
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{ "room_id", "!ircd" },
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{ "type", "m.room.create" },
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}
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};
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void
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rehash_conf(const string_view &prefix,
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const bool &existing)
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{
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const m::room::state state
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{
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conf_room
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};
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for(const auto &p : conf::items)
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{
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const auto &key{p.first};
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if(prefix && !startswith(key, prefix))
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continue;
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const auto &item{p.second}; assert(item);
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// Conf items marked with a persist=false property are not written
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// to the conf room.
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if(!item->feature.get("persist", true))
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continue;
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// Use the `existing` argument to toggle a force-overwrite
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if(!existing)
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if(state.has("ircd.conf.item", key))
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continue;
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create_conf_item(key, *item);
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}
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}
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void
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default_conf(const string_view &prefix)
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{
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for(const auto &p : conf::items)
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{
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const auto &key{p.first};
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if(prefix && !startswith(key, prefix))
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continue;
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const auto &item{p.second}; assert(item);
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const auto value
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{
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unquote(item->feature["default"])
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};
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conf::set(key, value);
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}
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}
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void
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reload_conf()
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{
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init_conf_items();
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}
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void
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refresh_conf()
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{
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ircd::conf::reset();
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}
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