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modules/s_fetch: Add branch for auth chain fetch/eval on missing room state for event.

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This commit is contained in:
Jason Volk 2019-03-27 13:45:21 -07:00
parent 1c5b7d2d71
commit 0043cb2af7
2 changed files with 19 additions and 2 deletions
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4
include/ircd/m/vm.h
View file

@ -219,6 +219,10 @@ struct ircd::m::vm::opts
/// TODO: Y
bool head_must_exist {false};
/// Whether to automatically fetch and evaluate the auth chain for the
/// event; effective when there is no state for this room on the server.
bool fetch_auth_chain {true};
/// Evaluators can set this value to optimize the creation of the database
/// transaction where the event will be stored. This value should be set
/// to the amount of space the event consumes; the JSON-serialized size is

17
modules/s_fetch.cc
View file

@ -59,19 +59,31 @@ ircd::m::fetch::hook_handler(const event &event,
if(type == "m.room.create")
return;
const m::event::id &event_id
{
at<"event_id"_>(event)
};
const m::room::id &room_id
{
at<"room_id"_>(event)
};
if(opts.head_must_exist || opts.history)
if(!exists(room_id))
if(!exists(room_id))
{
if((opts.head_must_exist || opts.history) && !opts.fetch_auth_chain)
throw vm::error
{
vm::fault::STATE, "Missing state for room %s",
string_view{room_id}
};
m::room room{room_id};
room.event_id = event_id;
const m::room::auth auth{room};
auth.chain_eval(auth, event_id.host());
}
const event::prev prev
{
*eval.event_
@ -117,6 +129,7 @@ ircd::m::room::auth::chain_eval(const auth &auth,
m::vm::opts opts;
opts.non_conform.set(m::event::conforms::MISSING_PREV_STATE);
opts.infolog_accept = true;
opts.prev_check_exists = false;
opts.warnlog |= m::vm::fault::STATE;
opts.warnlog &= ~m::vm::fault::EXISTS;
opts.errorlog &= ~m::vm::fault::STATE;