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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package app
import (
"bufio"
"encoding/json"
"io"
"net/http"
"strings"
"sync"
"github.com/mattermost/mattermost-server/model"
)
func (a *App) bulkImportWorker(dryRun bool, wg *sync.WaitGroup, lines <-chan LineImportWorkerData, errors chan<- LineImportWorkerError) {
for line := range lines {
if err := a.ImportLine(line.LineImportData, dryRun); err != nil {
errors <- LineImportWorkerError{err, line.LineNumber}
}
}
wg.Done()
}
func (a *App) BulkImport(fileReader io.Reader, dryRun bool, workers int) (*model.AppError, int) {
scanner := bufio.NewScanner(fileReader)
lineNumber := 0
a.Srv.Store.LockToMaster()
defer a.Srv.Store.UnlockFromMaster()
errorsChan := make(chan LineImportWorkerError, (2*workers)+1) // size chosen to ensure it never gets filled up completely.
var wg sync.WaitGroup
var linesChan chan LineImportWorkerData
lastLineType := ""
for scanner.Scan() {
decoder := json.NewDecoder(strings.NewReader(scanner.Text()))
lineNumber++
var line LineImportData
if err := decoder.Decode(&line); err != nil {
return model.NewAppError("BulkImport", "app.import.bulk_import.json_decode.error", nil, err.Error(), http.StatusBadRequest), lineNumber
}
if lineNumber == 1 {
importDataFileVersion, apperr := processImportDataFileVersionLine(line)
if apperr != nil {
return apperr, lineNumber
}
if importDataFileVersion != 1 {
return model.NewAppError("BulkImport", "app.import.bulk_import.unsupported_version.error", nil, "", http.StatusBadRequest), lineNumber
}
continue
}
if line.Type != lastLineType {
if lastLineType != "" {
// Changing type. Clear out the worker queue before continuing.
close(linesChan)
wg.Wait()
// Check no errors occurred while waiting for the queue to empty.
if len(errorsChan) != 0 {
err := <-errorsChan
return err.Error, err.LineNumber
}
}
// Set up the workers and channel for this type.
lastLineType = line.Type
linesChan = make(chan LineImportWorkerData, workers)
for i := 0; i < workers; i++ {
wg.Add(1)
go a.bulkImportWorker(dryRun, &wg, linesChan, errorsChan)
}
}
select {
case linesChan <- LineImportWorkerData{line, lineNumber}:
case err := <-errorsChan:
close(linesChan)
wg.Wait()
return err.Error, err.LineNumber
}
}
// No more lines. Clear out the worker queue before continuing.
close(linesChan)
wg.Wait()
// Check no errors occurred while waiting for the queue to empty.
if len(errorsChan) != 0 {
err := <-errorsChan
return err.Error, err.LineNumber
}
if err := scanner.Err(); err != nil {
return model.NewAppError("BulkImport", "app.import.bulk_import.file_scan.error", nil, err.Error(), http.StatusInternalServerError), 0
}
if err := a.finalizeImport(dryRun); err != nil {
return err, 0
}
return nil, 0
}
func processImportDataFileVersionLine(line LineImportData) (int, *model.AppError) {
if line.Type != "version" || line.Version == nil {
return -1, model.NewAppError("BulkImport", "app.import.process_import_data_file_version_line.invalid_version.error", nil, "", http.StatusBadRequest)
}
return *line.Version, nil
}
func (a *App) ImportLine(line LineImportData, dryRun bool) *model.AppError {
switch {
case line.Type == "scheme":
if line.Scheme == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_scheme.error", nil, "", http.StatusBadRequest)
}
return a.ImportScheme(line.Scheme, dryRun)
case line.Type == "team":
if line.Team == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_team.error", nil, "", http.StatusBadRequest)
}
return a.ImportTeam(line.Team, dryRun)
case line.Type == "channel":
if line.Channel == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_channel.error", nil, "", http.StatusBadRequest)
}
return a.ImportChannel(line.Channel, dryRun)
case line.Type == "user":
if line.User == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_user.error", nil, "", http.StatusBadRequest)
}
return a.ImportUser(line.User, dryRun)
case line.Type == "post":
if line.Post == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_post.error", nil, "", http.StatusBadRequest)
}
return a.ImportPost(line.Post, dryRun)
case line.Type == "direct_channel":
if line.DirectChannel == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_direct_channel.error", nil, "", http.StatusBadRequest)
}
return a.ImportDirectChannel(line.DirectChannel, dryRun)
case line.Type == "direct_post":
if line.DirectPost == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_direct_post.error", nil, "", http.StatusBadRequest)
}
return a.ImportDirectPost(line.DirectPost, dryRun)
case line.Type == "emoji":
if line.Emoji == nil {
return model.NewAppError("BulkImport", "app.import.import_line.null_emoji.error", nil, "", http.StatusBadRequest)
}
return a.ImportEmoji(line.Emoji, dryRun)
default:
return model.NewAppError("BulkImport", "app.import.import_line.unknown_line_type.error", map[string]interface{}{"Type": line.Type}, "", http.StatusBadRequest)
}
}
func (a *App) finalizeImport(dryRun bool) *model.AppError {
if dryRun {
return nil
}
result := <-a.Srv.Store.Channel().ResetLastPostAt()
if result.Err != nil {
return result.Err
}
return nil
}
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