mirror of
https://github.com/matrix-org/dendrite
synced 2024-12-16 08:12:47 +00:00
b189edf4f4
Replaced with types.HeaderedEvent _for now_. In reality we want to move them all to gmsl.Event and only use HeaderedEvent when we _need_ to bundle the version/event ID with the event (seriailsation boundaries, and even then only when we don't have the room version). Requires https://github.com/matrix-org/gomatrixserverlib/pull/373
76 lines
2.2 KiB
Go
76 lines
2.2 KiB
Go
// Copyright 2020 The Matrix.org Foundation C.I.C.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Package hooks exposes places in Dendrite where custom code can be executed, useful for MSCs.
|
|
// Hooks can only be run in monolith mode.
|
|
package hooks
|
|
|
|
import (
|
|
"sync"
|
|
)
|
|
|
|
const (
|
|
// KindNewEventPersisted is a hook which is called with *types.HeaderedEvent
|
|
// It is run when a new event is persisted in the roomserver.
|
|
// Usage:
|
|
// hooks.Attach(hooks.KindNewEventPersisted, func(headeredEvent interface{}) { ... })
|
|
KindNewEventPersisted = "new_event_persisted"
|
|
// KindNewEventReceived is a hook which is called with *types.HeaderedEvent
|
|
// It is run before a new event is processed by the roomserver. This hook can be used
|
|
// to modify the event before it is persisted by adding data to `unsigned`.
|
|
// Usage:
|
|
// hooks.Attach(hooks.KindNewEventReceived, func(headeredEvent interface{}) {
|
|
// ev := headeredEvent.(*types.HeaderedEvent)
|
|
// _ = ev.SetUnsignedField("key", "val")
|
|
// })
|
|
KindNewEventReceived = "new_event_received"
|
|
)
|
|
|
|
var (
|
|
hookMap = make(map[string][]func(interface{}))
|
|
hookMu = sync.Mutex{}
|
|
enabled = false
|
|
)
|
|
|
|
// Enable all hooks. This may slow down the server slightly. Required for MSCs to work.
|
|
func Enable() {
|
|
enabled = true
|
|
}
|
|
|
|
// Run any hooks
|
|
func Run(kind string, data interface{}) {
|
|
if !enabled {
|
|
return
|
|
}
|
|
cbs := callbacks(kind)
|
|
for _, cb := range cbs {
|
|
cb(data)
|
|
}
|
|
}
|
|
|
|
// Attach a hook
|
|
func Attach(kind string, callback func(interface{})) {
|
|
if !enabled {
|
|
return
|
|
}
|
|
hookMu.Lock()
|
|
defer hookMu.Unlock()
|
|
hookMap[kind] = append(hookMap[kind], callback)
|
|
}
|
|
|
|
func callbacks(kind string) []func(interface{}) {
|
|
hookMu.Lock()
|
|
defer hookMu.Unlock()
|
|
return hookMap[kind]
|
|
}
|