Mono repo -> Master (#22553)

Combines the following repositories into one:

https://github.com/mattermost/mattermost-server
https://github.com/mattermost/mattermost-webapp
https://github.com/mattermost/focalboard
https://github.com/mattermost/mattermost-plugin-playbooks

server/boards/ws/plugin_adapter_cluster.go

@@ -0,0 +1,83 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package ws
+
+import (
+	"encoding/json"
+
+	mm_model "github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+)
+
+type ClusterMessage struct {
+	TeamID      string
+	BoardID     string
+	UserID      string
+	Payload     map[string]interface{}
+	EnsureUsers []string
+}
+
+func (pa *PluginAdapter) sendMessageToCluster(clusterMessage *ClusterMessage) {
+	const id = "websocket_message"
+	b, err := json.Marshal(clusterMessage)
+	if err != nil {
+		pa.logger.Error("couldn't get JSON bytes from cluster message",
+			mlog.String("id", id),
+			mlog.Err(err),
+		)
+		return
+	}
+
+	event := mm_model.PluginClusterEvent{Id: id, Data: b}
+	opts := mm_model.PluginClusterEventSendOptions{
+		SendType: mm_model.PluginClusterEventSendTypeReliable,
+	}
+
+	if err := pa.api.PublishPluginClusterEvent(event, opts); err != nil {
+		pa.logger.Error("error publishing cluster event",
+			mlog.String("id", id),
+			mlog.Err(err),
+		)
+	}
+}
+
+func (pa *PluginAdapter) HandleClusterEvent(ev mm_model.PluginClusterEvent) {
+	pa.logger.Debug("received cluster event", mlog.String("id", ev.Id))
+
+	var clusterMessage ClusterMessage
+	if err := json.Unmarshal(ev.Data, &clusterMessage); err != nil {
+		pa.logger.Error("cannot unmarshal cluster message data",
+			mlog.String("id", ev.Id),
+			mlog.Err(err),
+		)
+		return
+	}
+
+	if clusterMessage.BoardID != "" {
+		pa.sendBoardMessageSkipCluster(clusterMessage.TeamID, clusterMessage.BoardID, clusterMessage.Payload, clusterMessage.EnsureUsers...)
+		return
+	}
+
+	var action string
+	if actionRaw, ok := clusterMessage.Payload["action"]; ok {
+		if s, ok := actionRaw.(string); ok {
+			action = s
+		}
+	}
+	if action == "" {
+		// no action was specified in the event; assume block change and warn.
+		pa.logger.Warn("cannot determine action from cluster message data",
+			mlog.String("id", ev.Id),
+			mlog.Map("payload", clusterMessage.Payload),
+		)
+		return
+	}
+
+	if clusterMessage.UserID != "" {
+		pa.sendUserMessageSkipCluster(action, clusterMessage.Payload, clusterMessage.UserID)
+		return
+	}
+
+	pa.sendTeamMessageSkipCluster(action, clusterMessage.TeamID, clusterMessage.Payload)
+}