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/channels/jobs/migrations/migrations.go

@@ -0,0 +1,54 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package migrations
+
+import (
+	"net/http"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/channels/store"
+)
+
+const (
+	MigrationStateUnscheduled = "unscheduled"
+	MigrationStateInProgress  = "in_progress"
+	MigrationStateCompleted   = "completed"
+
+	JobDataKeyMigration         = "migration_key"
+	JobDataKeyMigrationLastDone = "last_done"
+)
+
+func MakeMigrationsList() []string {
+	return []string{
+		model.MigrationKeyAdvancedPermissionsPhase2,
+	}
+}
+
+func GetMigrationState(migration string, store store.Store) (string, *model.Job, *model.AppError) {
+	if _, err := store.System().GetByName(migration); err == nil {
+		return MigrationStateCompleted, nil, nil
+	}
+
+	jobs, err := store.Job().GetAllByType(model.JobTypeMigrations)
+	if err != nil {
+		return "", nil, model.NewAppError("GetMigrationState", "app.job.get_all.app_error", nil, "", http.StatusInternalServerError).Wrap(err)
+	}
+
+	for _, job := range jobs {
+		if key, ok := job.Data[JobDataKeyMigration]; ok {
+			if key != migration {
+				continue
+			}
+
+			switch job.Status {
+			case model.JobStatusInProgress, model.JobStatusPending:
+				return MigrationStateInProgress, job, nil
+			default:
+				return MigrationStateUnscheduled, job, nil
+			}
+		}
+	}
+
+	return MigrationStateUnscheduled, nil, nil
+}