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Handle state with input event as new events (#1415)

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* SendEventWithState events as new

* Use cumulative state IDs for final event

* Error wrapping in calculateAndSetState

* Handle overwriting same event type and state key

* Hacky way to spot historical events

* Don't exclude from sync

* Don't generate output events when rewriting forward extremities

* Update output event check

* Historical output events

* Define output room event type

* Notify key changes on state

* Don't send our membership event twice

* Deduplicate state entries

* Tweaks

* Remove unnecessary nolint

* Fix current state upsert in sync API

* Send auth events as outliers, state events as rewrite

* Sync API don't consume state events

* Process events actually

* Improve outlier check

* Fix local room check

* Remove extra room check, it seems to break the whole damn world

* Fix federated join check

* Fix nil pointer exception

* Better comments on DeduplicateStateEntries

* Reflow forced federated joins

* Don't force federated join for possibly even local invites

* Comment SendEventWithState better

* Rewrite room state in sync API storage

* Add TODO

* Clean up all room data when receiving create event

* Don't generate output events for rewrites, but instead notify that state is rewritten on the final new event

* Rename to PurgeRoom

* Exclude backfilled messages from /sync

* Split out rewriting state from updating state from state res

Co-authored-by: Kegan Dougal <kegan@matrix.org>
This commit is contained in:
Neil Alexander 2020-09-15 11:17:46 +01:00 • committed by GitHub
parent 8dc9506210
commit 965f068d1a
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23 changed files with 616 additions and 30 deletions
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21
roomserver/types/types.go
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@ -16,6 +16,8 @@
package types
import (
"sort"
"github.com/matrix-org/gomatrixserverlib"
)
@ -72,6 +74,25 @@ func (a StateEntry) LessThan(b StateEntry) bool {
return a.EventNID < b.EventNID
}
// Deduplicate takes a set of state entries and ensures that there are no
// duplicate (event type, state key) tuples. If there are then we dedupe
// them, making sure that the latest/highest NIDs are always chosen.
func DeduplicateStateEntries(a []StateEntry) []StateEntry {
if len(a) < 2 {
return a
}
sort.SliceStable(a, func(i, j int) bool {
return a[i].LessThan(a[j])
})
for i := 0; i < len(a)-1; i++ {
if a[i].StateKeyTuple == a[i+1].StateKeyTuple {
a = append(a[:i], a[i+1:]...)
i--
}
}
return a
}
// StateAtEvent is the state before and after a matrix event.
type StateAtEvent struct {
// Should this state overwrite the latest events and memberships of the room?