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/export_process/worker.go

@@ -0,0 +1,70 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package export_process
+
+import (
+	"context"
+	"io"
+	"path/filepath"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/channels/app/request"
+	"github.com/mattermost/mattermost-server/v6/server/channels/jobs"
+	"github.com/mattermost/mattermost-server/v6/server/platform/services/configservice"
+	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+)
+
+const jobName = "ExportProcess"
+
+type AppIface interface {
+	configservice.ConfigService
+	WriteFile(fr io.Reader, path string) (int64, *model.AppError)
+	WriteFileContext(ctx context.Context, fr io.Reader, path string) (int64, *model.AppError)
+	BulkExport(ctx request.CTX, writer io.Writer, outPath string, job *model.Job, opts model.BulkExportOpts) *model.AppError
+	Log() *mlog.Logger
+}
+
+func MakeWorker(jobServer *jobs.JobServer, app AppIface) model.Worker {
+	isEnabled := func(cfg *model.Config) bool { return true }
+	execute := func(job *model.Job) error {
+		defer jobServer.HandleJobPanic(job)
+
+		opts := model.BulkExportOpts{
+			CreateArchive: true,
+		}
+
+		includeAttachments, ok := job.Data["include_attachments"]
+		if ok && includeAttachments == "true" {
+			opts.IncludeAttachments = true
+		}
+
+		outPath := *app.Config().ExportSettings.Directory
+		exportFilename := job.Id + "_export.zip"
+
+		rd, wr := io.Pipe()
+
+		go func() {
+			_, appErr := app.WriteFileContext(context.Background(), rd, filepath.Join(outPath, exportFilename))
+			if appErr != nil {
+				// we close the reader here to prevent a deadlock when the bulk exporter tries to
+				// write into the pipe while app.WriteFile has already returned. The error will be
+				// returned by the writer part of the pipe when app.BulkExport tries to call
+				// wr.Write() on it.
+				rd.CloseWithError(appErr) // CloseWithError never returns an error
+			}
+		}()
+
+		logger := app.Log().With(mlog.String("job_id", job.Id))
+		appErr := app.BulkExport(request.EmptyContext(logger), wr, outPath, job, opts)
+		wr.Close() // Close never returns an error
+
+		if appErr != nil {
+			return appErr
+		}
+
+		return nil
+	}
+	worker := jobs.NewSimpleWorker(jobName, jobServer, execute, isEnabled)
+	return worker
+}