PLT-6937: Bulk Importing of Direct/Group channels and posts. (#6761)

* PLT-6937: Bulk Importing of Direct/Group channels and posts.

* Show group/direct channels in sidebar.

app/channel.go

@@ -160,6 +160,27 @@ func CreateChannel(channel *model.Channel, addMember bool) (*model.Channel, *mod
 }
 
 func CreateDirectChannel(userId string, otherUserId string) (*model.Channel, *model.AppError) {
+	if channel, err := createDirectChannel(userId, otherUserId); err != nil {
+		if err.Id == store.CHANNEL_EXISTS_ERROR {
+			return channel, nil
+		} else {
+			return nil, err
+		}
+	} else {
+		WaitForChannelMembership(channel.Id, userId)
+
+		InvalidateCacheForUser(userId)
+		InvalidateCacheForUser(otherUserId)
+
+		message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_DIRECT_ADDED, "", channel.Id, "", nil)
+		message.Add("teammate_id", otherUserId)
+		Publish(message)
+
+		return channel, nil
+	}
+}
+
+func createDirectChannel(userId string, otherUserId string) (*model.Channel, *model.AppError) {
 	uc1 := Srv.Store.User().Get(userId)
 	uc2 := Srv.Store.User().Get(otherUserId)
 
@@ -173,22 +194,12 @@ func CreateDirectChannel(userId string, otherUserId string) (*model.Channel, *mo
 
 	if result := <-Srv.Store.Channel().CreateDirectChannel(userId, otherUserId); result.Err != nil {
 		if result.Err.Id == store.CHANNEL_EXISTS_ERROR {
-			return result.Data.(*model.Channel), nil
+			return result.Data.(*model.Channel), result.Err
 		} else {
 			return nil, result.Err
 		}
 	} else {
 		channel := result.Data.(*model.Channel)
-
-		WaitForChannelMembership(channel.Id, userId)
-
-		InvalidateCacheForUser(userId)
-		InvalidateCacheForUser(otherUserId)
-
-		message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_DIRECT_ADDED, "", channel.Id, "", nil)
-		message.Add("teammate_id", otherUserId)
-		Publish(message)
-
 		return channel, nil
 	}
 }
@@ -219,6 +230,30 @@ func WaitForChannelMembership(channelId string, userId string) {
 }
 
 func CreateGroupChannel(userIds []string, creatorId string) (*model.Channel, *model.AppError) {
+	if channel, err := createGroupChannel(userIds, creatorId); err != nil {
+		if err.Id == store.CHANNEL_EXISTS_ERROR {
+			return channel, nil
+		} else {
+			return nil, err
+		}
+	} else {
+		for _, userId := range userIds {
+			if userId == creatorId {
+				WaitForChannelMembership(channel.Id, creatorId)
+			}
+
+			InvalidateCacheForUser(userId)
+		}
+
+		message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_GROUP_ADDED, "", channel.Id, "", nil)
+		message.Add("teammate_ids", model.ArrayToJson(userIds))
+		Publish(message)
+
+		return channel, nil
+	}
+}
+
+func createGroupChannel(userIds []string, creatorId string) (*model.Channel, *model.AppError) {
 	if len(userIds) > model.CHANNEL_GROUP_MAX_USERS || len(userIds) < model.CHANNEL_GROUP_MIN_USERS {
 		return nil, model.NewAppError("CreateGroupChannel", "api.channel.create_group.bad_size.app_error", nil, "", http.StatusBadRequest)
 	}
@@ -231,7 +266,7 @@ func CreateGroupChannel(userIds []string, creatorId string) (*model.Channel, *mo
 	}
 
 	if len(users) != len(userIds) {
-		return nil, model.NewAppError("CreateGroupChannel", "api.channel.create_group.bad_user.app_error", nil, "user_ids="+model.ArrayToJson(userIds), http.StatusBadRequest)
+		return nil, model.NewAppError("CreateGroupChannel", "api.channel.create_group.bad_user.app_error", nil, "user_ids=" + model.ArrayToJson(userIds), http.StatusBadRequest)
 	}
 
 	group := &model.Channel{
@@ -242,7 +277,7 @@ func CreateGroupChannel(userIds []string, creatorId string) (*model.Channel, *mo
 
 	if result := <-Srv.Store.Channel().Save(group); result.Err != nil {
 		if result.Err.Id == store.CHANNEL_EXISTS_ERROR {
-			return result.Data.(*model.Channel), nil
+			return result.Data.(*model.Channel), result.Err
 		} else {
 			return nil, result.Err
 		}
@@ -260,18 +295,8 @@ func CreateGroupChannel(userIds []string, creatorId string) (*model.Channel, *mo
 			if result := <-Srv.Store.Channel().SaveMember(cm); result.Err != nil {
 				return nil, result.Err
 			}
-
-			if user.Id == creatorId {
-				WaitForChannelMembership(group.Id, creatorId)
-			}
-
-			InvalidateCacheForUser(user.Id)
 		}
 
-		message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_GROUP_ADDED, "", group.Id, "", nil)
-		message.Add("teammate_ids", model.ArrayToJson(userIds))
-		Publish(message)
-
 		return channel, nil
 	}
 }

app/import.go

@@ -17,17 +17,20 @@ import (
 	l4g "github.com/alecthomas/log4go"
 	"github.com/mattermost/platform/model"
 	"github.com/mattermost/platform/utils"
+	"github.com/mattermost/platform/store"
 )
 
 // Import Data Models
 
 type LineImportData struct {
-	Type    string             `json:"type"`
-	Team    *TeamImportData    `json:"team"`
-	Channel *ChannelImportData `json:"channel"`
-	User    *UserImportData    `json:"user"`
-	Post    *PostImportData    `json:"post"`
-	Version *int               `json:"version"`
+	Type          string                   `json:"type"`
+	Team          *TeamImportData          `json:"team"`
+	Channel       *ChannelImportData       `json:"channel"`
+	User          *UserImportData          `json:"user"`
+	Post          *PostImportData          `json:"post"`
+	DirectChannel *DirectChannelImportData `json:"direct_channel"`
+	DirectPost    *DirectPostImportData    `json:"direct_post"`
+	Version       *int                     `json:"version"`
 }
 
 type TeamImportData struct {
@@ -97,6 +100,20 @@ type PostImportData struct {
 	CreateAt *int64  `json:"create_at"`
 }
 
+type DirectChannelImportData struct {
+	Members *[]string `json:"members"`
+
+	Header *string `json:"header"`
+}
+
+type DirectPostImportData struct {
+	ChannelMembers *[]string `json:"channel_members"`
+	User           *string   `json:"user"`
+
+	Message  *string `json:"message"`
+	CreateAt *int64  `json:"create_at"`
+}
+
 type LineImportWorkerData struct {
 	LineImportData
 	LineNumber int
@@ -233,6 +250,18 @@ func ImportLine(line LineImportData, dryRun bool) *model.AppError {
 		} else {
 			return 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)
+		} else {
+			return 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)
+		} else {
+			return ImportDirectPost(line.DirectPost, dryRun)
+		}
 	default:
 		return model.NewLocAppError("BulkImport", "app.import.import_line.unknown_line_type.error", map[string]interface{}{"Type": line.Type}, "")
 	}
@@ -945,6 +974,205 @@ func validatePostImportData(data *PostImportData) *model.AppError {
 	return nil
 }
 
+func ImportDirectChannel(data *DirectChannelImportData, dryRun bool) *model.AppError {
+	if err := validateDirectChannelImportData(data); err != nil {
+		return err
+	}
+
+	// If this is a Dry Run, do not continue any further.
+	if dryRun {
+		return nil
+	}
+
+	var userIds []string
+	for _, username := range *data.Members {
+		if result := <-Srv.Store.User().GetByUsername(username); result.Err == nil {
+			user := result.Data.(*model.User)
+			userIds = append(userIds, user.Id)
+		} else {
+			return model.NewAppError("BulkImport", "app.import.import_direct_channel.member_not_found.error", nil, "", http.StatusBadRequest)
+		}
+	}
+
+	var channel *model.Channel
+
+	if len(userIds) == 2 {
+		ch, err := createDirectChannel(userIds[0], userIds[1])
+		if err != nil && err.Id != store.CHANNEL_EXISTS_ERROR {
+			return model.NewAppError("BulkImport", "app.import.import_direct_channel.create_direct_channel.error", nil, "", http.StatusBadRequest)
+		} else {
+			channel = ch
+		}
+	} else {
+		ch, err := createGroupChannel(userIds, userIds[0])
+		if err != nil && err.Id != store.CHANNEL_EXISTS_ERROR  {
+			return model.NewAppError("BulkImport", "app.import.import_direct_channel.create_group_channel.error", nil, "", http.StatusBadRequest)
+		} else {
+			channel = ch
+		}
+	}
+
+	for _, userId := range userIds {
+		preferences := model.Preferences{
+			model.Preference{
+				UserId: userId,
+				Category: model.PREFERENCE_CATEGORY_DIRECT_CHANNEL_SHOW,
+				Name: channel.Id,
+				Value: "true",
+			},
+		}
+		if result := <-Srv.Store.Preference().Save(&preferences); result.Err != nil {
+			result.Err.StatusCode = http.StatusBadRequest
+			return result.Err
+		}
+	}
+
+	if data.Header != nil {
+		channel.Header = *data.Header
+		if result := <-Srv.Store.Channel().Update(channel); result.Err != nil {
+			return model.NewAppError("BulkImport", "app.import.import_direct_channel.update_header_failed.error", nil, "", http.StatusBadRequest)
+		}
+	}
+
+	return nil
+}
+
+func validateDirectChannelImportData(data *DirectChannelImportData) *model.AppError {
+	if data.Members == nil {
+		return model.NewLocAppError("BulkImport", "app.import.validate_direct_channel_import_data.members_required.error", nil, "")
+	}
+
+	if len(*data.Members) != 2 {
+		if len(*data.Members) < model.CHANNEL_GROUP_MIN_USERS {
+			return model.NewLocAppError("BulkImport", "app.import.validate_direct_channel_import_data.members_too_few.error", nil, "")
+		} else if len(*data.Members) > model.CHANNEL_GROUP_MAX_USERS {
+			return model.NewLocAppError("BulkImport", "app.import.validate_direct_channel_import_data.members_too_many.error", nil, "")
+		}
+	}
+
+	if data.Header != nil && utf8.RuneCountInString(*data.Header) > model.CHANNEL_HEADER_MAX_RUNES {
+		return model.NewLocAppError("BulkImport", "app.import.validate_direct_channel_import_data.header_length.error", nil, "")
+	}
+
+	return nil
+}
+
+func ImportDirectPost(data *DirectPostImportData, dryRun bool) *model.AppError {
+	if err := validateDirectPostImportData(data); err != nil {
+		return err
+	}
+
+	// If this is a Dry Run, do not continue any further.
+	if dryRun {
+		return nil
+	}
+
+	var userIds []string
+	for _, username := range *data.ChannelMembers {
+		if result := <-Srv.Store.User().GetByUsername(username); result.Err == nil {
+			user := result.Data.(*model.User)
+			userIds = append(userIds, user.Id)
+		} else {
+			return model.NewAppError("BulkImport", "app.import.import_direct_post.channel_member_not_found.error", nil, "", http.StatusBadRequest)
+		}
+	}
+
+	var channel *model.Channel
+	if len(userIds) == 2 {
+		ch, err := createDirectChannel(userIds[0], userIds[1])
+		if err != nil && err.Id != store.CHANNEL_EXISTS_ERROR {
+			return model.NewAppError("BulkImport", "app.import.import_direct_channel.create_direct_channel.error", nil, "", http.StatusBadRequest)
+		} else {
+			channel = ch
+		}
+	} else {
+		ch, err := createGroupChannel(userIds, userIds[0])
+		if err != nil && err.Id != store.CHANNEL_EXISTS_ERROR  {
+			return model.NewAppError("BulkImport", "app.import.import_direct_channel.create_group_channel.error", nil, "", http.StatusBadRequest)
+		} else {
+			channel = ch
+		}
+	}
+
+	var user *model.User
+	if result := <-Srv.Store.User().GetByUsername(*data.User); result.Err != nil {
+		return model.NewAppError("BulkImport", "app.import.import_direct_post.user_not_found.error", map[string]interface{}{"Username": *data.User}, "", http.StatusBadRequest)
+	} else {
+		user = result.Data.(*model.User)
+	}
+
+	// Check if this post already exists.
+	var posts []*model.Post
+	if result := <-Srv.Store.Post().GetPostsCreatedAt(channel.Id, *data.CreateAt); result.Err != nil {
+		return result.Err
+	} else {
+		posts = result.Data.([]*model.Post)
+	}
+
+	var post *model.Post
+	for _, p := range posts {
+		if p.Message == *data.Message {
+			post = p
+			break
+		}
+	}
+
+	if post == nil {
+		post = &model.Post{}
+	}
+
+	post.ChannelId = channel.Id
+	post.Message = *data.Message
+	post.UserId = user.Id
+	post.CreateAt = *data.CreateAt
+
+	post.Hashtags, _ = model.ParseHashtags(post.Message)
+
+	if post.Id == "" {
+		if result := <-Srv.Store.Post().Save(post); result.Err != nil {
+			return result.Err
+		}
+	} else {
+		if result := <-Srv.Store.Post().Overwrite(post); result.Err != nil {
+			return result.Err
+		}
+	}
+
+	return nil
+}
+
+func validateDirectPostImportData(data *DirectPostImportData) *model.AppError {
+	if data.ChannelMembers == nil {
+		return model.NewLocAppError("BulkImport", "app.import.validate_direct_post_import_data.channel_members_required.error", nil, "")
+	}
+
+	if len(*data.ChannelMembers) != 2 {
+		if len(*data.ChannelMembers) < model.CHANNEL_GROUP_MIN_USERS {
+			return model.NewLocAppError("BulkImport", "app.import.validate_direct_post_import_data.channel_members_too_few.error", nil, "")
+		} else if len(*data.ChannelMembers) > model.CHANNEL_GROUP_MAX_USERS {
+			return model.NewLocAppError("BulkImport", "app.import.validate_direct_post_import_data.channel_members_too_many.error", nil, "")
+		}
+	}
+
+	if data.User == nil {
+		return model.NewAppError("BulkImport", "app.import.validate_direct_post_import_data.user_missing.error", nil, "", http.StatusBadRequest)
+	}
+
+	if data.Message == nil {
+		return model.NewAppError("BulkImport", "app.import.validate_direct_post_import_data.message_missing.error", nil, "", http.StatusBadRequest)
+	} else if utf8.RuneCountInString(*data.Message) > model.POST_MESSAGE_MAX_RUNES {
+		return model.NewAppError("BulkImport", "app.import.validate_direct_post_import_data.message_length.error", nil, "", http.StatusBadRequest)
+	}
+
+	if data.CreateAt == nil {
+		return model.NewAppError("BulkImport", "app.import.validate_direct_post_import_data.create_at_missing.error", nil, "", http.StatusBadRequest)
+	} else if *data.CreateAt == 0 {
+		return model.NewAppError("BulkImport", "app.import.validate_direct_post_import_data.create_at_zero.error", nil, "", http.StatusBadRequest)
+	}
+
+	return nil
+}
+
 //
 // -- Old SlackImport Functions --
 // Import functions are sutible for entering posts and users into the database without

app/import_test.go

@@ -4,11 +4,13 @@
 package app
 
 import (
-	"github.com/mattermost/platform/model"
-	"github.com/mattermost/platform/utils"
 	"runtime/debug"
 	"strings"
 	"testing"
+
+	"github.com/mattermost/platform/model"
+	"github.com/mattermost/platform/store"
+	"github.com/mattermost/platform/utils"
 )
 
 func ptrStr(s string) *string {
@@ -571,6 +573,234 @@ func TestImportValidatePostImportData(t *testing.T) {
 	}
 }
 
+func TestImportValidateDirectChannelImportData(t *testing.T) {
+
+	// Test with valid number of members for direct message.
+	data := DirectChannelImportData{
+		Members: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+	}
+	if err := validateDirectChannelImportData(&data); err != nil {
+		t.Fatal("Validation failed but should have been valid.")
+	}
+
+	// Test with valid number of members for group message.
+	data = DirectChannelImportData{
+		Members: &[]string{
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+		},
+	}
+	if err := validateDirectChannelImportData(&data); err != nil {
+		t.Fatal("Validation failed but should have been valid.")
+	}
+
+	// Test with all the combinations of optional parameters.
+	data = DirectChannelImportData{
+		Members: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+		Header: ptrStr("Channel Header Here"),
+	}
+	if err := validateDirectChannelImportData(&data); err != nil {
+		t.Fatal("Should have succeeded with valid optional properties.")
+	}
+
+	// Test with invalid Header.
+	data.Header = ptrStr(strings.Repeat("abcdefghij ", 103))
+	if err := validateDirectChannelImportData(&data); err == nil {
+		t.Fatal("Should have failed due to too long header.")
+	}
+
+	// Test with different combinations of invalid member counts.
+	data = DirectChannelImportData{
+		Members: &[]string{},
+	}
+	if err := validateDirectChannelImportData(&data); err == nil {
+		t.Fatal("Validation should have failed due to invalid number of members.")
+	}
+
+	data = DirectChannelImportData{
+		Members: &[]string{
+			model.NewId(),
+		},
+	}
+	if err := validateDirectChannelImportData(&data); err == nil {
+		t.Fatal("Validation should have failed due to invalid number of members.")
+	}
+
+	data = DirectChannelImportData{
+		Members: &[]string{
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+		},
+	}
+	if err := validateDirectChannelImportData(&data); err == nil {
+		t.Fatal("Validation should have failed due to invalid number of members.")
+	}
+}
+
+func TestImportValidateDirectPostImportData(t *testing.T) {
+
+	// Test with minimum required valid properties.
+	data := DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+		User:     ptrStr("username"),
+		Message:  ptrStr("message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err != nil {
+		t.Fatal("Validation failed but should have been valid.")
+	}
+
+	// Test with missing required properties.
+	data = DirectPostImportData{
+		User:     ptrStr("username"),
+		Message:  ptrStr("message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to missing required property.")
+	}
+
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+		Message:  ptrStr("message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to missing required property.")
+	}
+
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+		User:     ptrStr("username"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to missing required property.")
+	}
+
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+		User:    ptrStr("username"),
+		Message: ptrStr("message"),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to missing required property.")
+	}
+
+	// Test with invalid numbers of channel members.
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{},
+		User:           ptrStr("username"),
+		Message:        ptrStr("message"),
+		CreateAt:       ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to unsuitable number of members.")
+	}
+
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+		},
+		User:     ptrStr("username"),
+		Message:  ptrStr("message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to unsuitable number of members.")
+	}
+
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+		},
+		User:     ptrStr("username"),
+		Message:  ptrStr("message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to unsuitable number of members.")
+	}
+
+	// Test with group message number of members.
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+			model.NewId(),
+		},
+		User:     ptrStr("username"),
+		Message:  ptrStr("message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err != nil {
+		t.Fatal("Validation failed but should have been valid.")
+	}
+
+	// Test with invalid message.
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+		User:     ptrStr("username"),
+		Message:  ptrStr(strings.Repeat("1234567890", 500)),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to too long message.")
+	}
+
+	// Test with invalid CreateAt
+	data = DirectPostImportData{
+		ChannelMembers: &[]string{
+			model.NewId(),
+			model.NewId(),
+		},
+		User:     ptrStr("username"),
+		Message:  ptrStr("message"),
+		CreateAt: ptrInt64(0),
+	}
+	if err := validateDirectPostImportData(&data); err == nil {
+		t.Fatal("Should have failed due to 0 create-at value.")
+	}
+}
+
 func TestImportImportTeam(t *testing.T) {
 	_ = Setup()
 
@@ -1719,6 +1949,529 @@ func TestImportImportPost(t *testing.T) {
 	}
 }
 
+func TestImportImportDirectChannel(t *testing.T) {
+	th := Setup().InitBasic()
+
+	// Check how many channels are in the database.
+	var directChannelCount int64
+	if r := <-Srv.Store.Channel().AnalyticsTypeCount("", model.CHANNEL_DIRECT); r.Err == nil {
+		directChannelCount = r.Data.(int64)
+	} else {
+		t.Fatalf("Failed to get direct channel count.")
+	}
+
+	var groupChannelCount int64
+	if r := <-Srv.Store.Channel().AnalyticsTypeCount("", model.CHANNEL_GROUP); r.Err == nil {
+		groupChannelCount = r.Data.(int64)
+	} else {
+		t.Fatalf("Failed to get group channel count.")
+	}
+
+	// Do an invalid channel in dry-run mode.
+	data := DirectChannelImportData{
+		Members: &[]string{
+			model.NewId(),
+		},
+		Header: ptrStr("Channel Header"),
+	}
+	if err := ImportDirectChannel(&data, true); err == nil {
+		t.Fatalf("Expected error due to invalid name.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Do a valid DIRECT channel with a nonexistent member in dry-run mode.
+	data.Members = &[]string{
+		model.NewId(),
+		model.NewId(),
+	}
+	if err := ImportDirectChannel(&data, true); err != nil {
+		t.Fatalf("Expected success as cannot validate existance of channel members in dry run mode.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Do a valid GROUP channel with a nonexistent member in dry-run mode.
+	data.Members = &[]string{
+		model.NewId(),
+		model.NewId(),
+		model.NewId(),
+	}
+	if err := ImportDirectChannel(&data, true); err != nil {
+		t.Fatalf("Expected success as cannot validate existance of channel members in dry run mode.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Do an invalid channel in apply mode.
+	data.Members = &[]string{
+		model.NewId(),
+	}
+	if err := ImportDirectChannel(&data, false); err == nil {
+		t.Fatalf("Expected error due to invalid member (apply mode).")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Do a valid DIRECT channel.
+	data.Members = &[]string{
+		th.BasicUser.Username,
+		th.BasicUser2.Username,
+	}
+	if err := ImportDirectChannel(&data, false); err != nil {
+		t.Fatalf("Expected success: %v", err.Error())
+	}
+
+	// Check that one more DIRECT channel is in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount+1)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Do the same DIRECT channel again.
+	if err := ImportDirectChannel(&data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount+1)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Update the channel's HEADER
+	data.Header = ptrStr("New Channel Header 2")
+	if err := ImportDirectChannel(&data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount+1)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Get the channel to check that the header was updated.
+	if channel, err := createDirectChannel(th.BasicUser.Id, th.BasicUser2.Id); err == nil || err.Id != store.CHANNEL_EXISTS_ERROR {
+		t.Fatal("Should have got store.CHANNEL_EXISTS_ERROR")
+	} else {
+		if channel.Header != *data.Header {
+			t.Fatal("Channel header has not been updated successfully.")
+		}
+	}
+
+	// Do a GROUP channel with an extra invalid member.
+	user3 := th.CreateUser()
+	data.Members = &[]string{
+		th.BasicUser.Username,
+		th.BasicUser2.Username,
+		user3.Username,
+		model.NewId(),
+	}
+	if err := ImportDirectChannel(&data, false); err == nil {
+		t.Fatalf("Should have failed due to invalid member in list.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount+1)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount)
+
+	// Do a valid GROUP channel.
+	data.Members = &[]string{
+		th.BasicUser.Username,
+		th.BasicUser2.Username,
+		user3.Username,
+	}
+	if err := ImportDirectChannel(&data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+
+	// Check that one more GROUP channel is in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount+1)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount+1)
+
+	// Do the same DIRECT channel again.
+	if err := ImportDirectChannel(&data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount+1)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount+1)
+
+	// Update the channel's HEADER
+	data.Header = ptrStr("New Channel Header 3")
+	if err := ImportDirectChannel(&data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+
+	// Check that no more channels are in the DB.
+	AssertChannelCount(t, model.CHANNEL_DIRECT, directChannelCount+1)
+	AssertChannelCount(t, model.CHANNEL_GROUP, groupChannelCount+1)
+
+	// Get the channel to check that the header was updated.
+	userIds := []string{
+		th.BasicUser.Id,
+		th.BasicUser2.Id,
+		user3.Id,
+	}
+	if channel, err := createGroupChannel(userIds, th.BasicUser.Id); err.Id != store.CHANNEL_EXISTS_ERROR {
+		t.Fatal("Should have got store.CHANNEL_EXISTS_ERROR")
+	} else {
+		if channel.Header != *data.Header {
+			t.Fatal("Channel header has not been updated successfully.")
+		}
+	}
+}
+
+func AssertChannelCount(t *testing.T, channelType string, expectedCount int64) {
+	if r := <-Srv.Store.Channel().AnalyticsTypeCount("", channelType); r.Err == nil {
+		count := r.Data.(int64)
+		if count != expectedCount {
+			debug.PrintStack()
+			t.Fatalf("Channel count of type: %v. Expected: %v, Got: %v", channelType, expectedCount, count)
+		}
+	} else {
+		debug.PrintStack()
+		t.Fatalf("Failed to get channel count.")
+	}
+}
+
+func TestImportImportDirectPost(t *testing.T) {
+	th := Setup().InitBasic()
+
+	// Create the DIRECT channel.
+	channelData := DirectChannelImportData{
+		Members: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+		},
+	}
+	if err := ImportDirectChannel(&channelData, false); err != nil {
+		t.Fatalf("Expected success: %v", err.Error())
+	}
+
+	// Get the channel.
+	var directChannel *model.Channel
+	if channel, err := createDirectChannel(th.BasicUser.Id, th.BasicUser2.Id); err.Id != store.CHANNEL_EXISTS_ERROR {
+		t.Fatal("Should have got store.CHANNEL_EXISTS_ERROR")
+	} else {
+		directChannel = channel
+	}
+
+	// Get the number of posts in the system.
+	var initialPostCount int64
+	if result := <-Srv.Store.Post().AnalyticsPostCount("", false, false); result.Err != nil {
+		t.Fatal(result.Err)
+	} else {
+		initialPostCount = result.Data.(int64)
+	}
+
+	// Try adding an invalid post in dry run mode.
+	data := &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, true); err == nil {
+		t.Fatalf("Expected error.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 0, "")
+
+	// Try adding a valid post in dry run mode.
+	data = &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		Message:  ptrStr("Message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, true); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 0, "")
+
+	// Try adding an invalid post in apply mode.
+	data = &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			model.NewId(),
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		Message:  ptrStr("Message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, false); err == nil {
+		t.Fatalf("Expected error.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 0, "")
+
+	// Try adding a valid post in apply mode.
+	data = &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		Message:  ptrStr("Message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success: %v", err.Error())
+	}
+	AssertAllPostsCount(t, initialPostCount, 1, "")
+
+	// Check the post values.
+	if result := <-Srv.Store.Post().GetPostsCreatedAt(directChannel.Id, *data.CreateAt); result.Err != nil {
+		t.Fatal(result.Err.Error())
+	} else {
+		posts := result.Data.([]*model.Post)
+		if len(posts) != 1 {
+			t.Fatal("Unexpected number of posts found.")
+		}
+		post := posts[0]
+		if post.Message != *data.Message || post.CreateAt != *data.CreateAt || post.UserId != th.BasicUser.Id {
+			t.Fatal("Post properties not as expected")
+		}
+	}
+
+	// Import the post again.
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 1, "")
+
+	// Check the post values.
+	if result := <-Srv.Store.Post().GetPostsCreatedAt(directChannel.Id, *data.CreateAt); result.Err != nil {
+		t.Fatal(result.Err.Error())
+	} else {
+		posts := result.Data.([]*model.Post)
+		if len(posts) != 1 {
+			t.Fatal("Unexpected number of posts found.")
+		}
+		post := posts[0]
+		if post.Message != *data.Message || post.CreateAt != *data.CreateAt || post.UserId != th.BasicUser.Id {
+			t.Fatal("Post properties not as expected")
+		}
+	}
+
+	// Save the post with a different time.
+	data.CreateAt = ptrInt64(*data.CreateAt + 1)
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 2, "")
+
+	// Save the post with a different message.
+	data.Message = ptrStr("Message 2")
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 3, "")
+
+	// Test with hashtags
+	data.Message = ptrStr("Message 2 #hashtagmashupcity")
+	data.CreateAt = ptrInt64(*data.CreateAt + 1)
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 4, "")
+
+	if result := <-Srv.Store.Post().GetPostsCreatedAt(directChannel.Id, *data.CreateAt); result.Err != nil {
+		t.Fatal(result.Err.Error())
+	} else {
+		posts := result.Data.([]*model.Post)
+		if len(posts) != 1 {
+			t.Fatal("Unexpected number of posts found.")
+		}
+		post := posts[0]
+		if post.Message != *data.Message || post.CreateAt != *data.CreateAt || post.UserId != th.BasicUser.Id {
+			t.Fatal("Post properties not as expected")
+		}
+		if post.Hashtags != "#hashtagmashupcity" {
+			t.Fatalf("Hashtags not as expected: %s", post.Hashtags)
+		}
+	}
+
+	// ------------------ Group Channel -------------------------
+
+	// Create the GROUP channel.
+	user3 := th.CreateUser()
+	channelData = DirectChannelImportData{
+		Members: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+			user3.Username,
+		},
+	}
+	if err := ImportDirectChannel(&channelData, false); err != nil {
+		t.Fatalf("Expected success: %v", err.Error())
+	}
+
+	// Get the channel.
+	var groupChannel *model.Channel
+	userIds := []string{
+		th.BasicUser.Id,
+		th.BasicUser2.Id,
+		user3.Id,
+	}
+	if channel, err := createGroupChannel(userIds, th.BasicUser.Id); err.Id != store.CHANNEL_EXISTS_ERROR {
+		t.Fatal("Should have got store.CHANNEL_EXISTS_ERROR")
+	} else {
+		groupChannel = channel
+	}
+
+	// Get the number of posts in the system.
+	if result := <-Srv.Store.Post().AnalyticsPostCount("", false, false); result.Err != nil {
+		t.Fatal(result.Err)
+	} else {
+		initialPostCount = result.Data.(int64)
+	}
+
+	// Try adding an invalid post in dry run mode.
+	data = &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+			user3.Username,
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, true); err == nil {
+		t.Fatalf("Expected error.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 0, "")
+
+	// Try adding a valid post in dry run mode.
+	data = &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+			user3.Username,
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		Message:  ptrStr("Message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, true); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 0, "")
+
+	// Try adding an invalid post in apply mode.
+	data = &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+			user3.Username,
+			model.NewId(),
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		Message:  ptrStr("Message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, false); err == nil {
+		t.Fatalf("Expected error.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 0, "")
+
+	// Try adding a valid post in apply mode.
+	data = &DirectPostImportData{
+		ChannelMembers: &[]string{
+			th.BasicUser.Username,
+			th.BasicUser2.Username,
+			user3.Username,
+		},
+		User:     ptrStr(th.BasicUser.Username),
+		Message:  ptrStr("Message"),
+		CreateAt: ptrInt64(model.GetMillis()),
+	}
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success: %v", err.Error())
+	}
+	AssertAllPostsCount(t, initialPostCount, 1, "")
+
+	// Check the post values.
+	if result := <-Srv.Store.Post().GetPostsCreatedAt(groupChannel.Id, *data.CreateAt); result.Err != nil {
+		t.Fatal(result.Err.Error())
+	} else {
+		posts := result.Data.([]*model.Post)
+		if len(posts) != 1 {
+			t.Fatal("Unexpected number of posts found.")
+		}
+		post := posts[0]
+		if post.Message != *data.Message || post.CreateAt != *data.CreateAt || post.UserId != th.BasicUser.Id {
+			t.Fatal("Post properties not as expected")
+		}
+	}
+
+	// Import the post again.
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 1, "")
+
+	// Check the post values.
+	if result := <-Srv.Store.Post().GetPostsCreatedAt(groupChannel.Id, *data.CreateAt); result.Err != nil {
+		t.Fatal(result.Err.Error())
+	} else {
+		posts := result.Data.([]*model.Post)
+		if len(posts) != 1 {
+			t.Fatal("Unexpected number of posts found.")
+		}
+		post := posts[0]
+		if post.Message != *data.Message || post.CreateAt != *data.CreateAt || post.UserId != th.BasicUser.Id {
+			t.Fatal("Post properties not as expected")
+		}
+	}
+
+	// Save the post with a different time.
+	data.CreateAt = ptrInt64(*data.CreateAt + 1)
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 2, "")
+
+	// Save the post with a different message.
+	data.Message = ptrStr("Message 2")
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 3, "")
+
+	// Test with hashtags
+	data.Message = ptrStr("Message 2 #hashtagmashupcity")
+	data.CreateAt = ptrInt64(*data.CreateAt + 1)
+	if err := ImportDirectPost(data, false); err != nil {
+		t.Fatalf("Expected success.")
+	}
+	AssertAllPostsCount(t, initialPostCount, 4, "")
+
+	if result := <-Srv.Store.Post().GetPostsCreatedAt(groupChannel.Id, *data.CreateAt); result.Err != nil {
+		t.Fatal(result.Err.Error())
+	} else {
+		posts := result.Data.([]*model.Post)
+		if len(posts) != 1 {
+			t.Fatal("Unexpected number of posts found.")
+		}
+		post := posts[0]
+		if post.Message != *data.Message || post.CreateAt != *data.CreateAt || post.UserId != th.BasicUser.Id {
+			t.Fatal("Post properties not as expected")
+		}
+		if post.Hashtags != "#hashtagmashupcity" {
+			t.Fatalf("Hashtags not as expected: %s", post.Hashtags)
+		}
+	}
+}
+
 func TestImportImportLine(t *testing.T) {
 	_ = Setup()
 
@@ -1754,6 +2507,18 @@ func TestImportImportLine(t *testing.T) {
 	if err := ImportLine(line, false); err == nil {
 		t.Fatalf("Expected an error when importing a line with type post with a nil post.")
 	}
+
+	// Try import line with direct_channel type but nil direct_channel.
+	line.Type = "direct_channel"
+	if err := ImportLine(line, false); err == nil {
+		t.Fatalf("Expected an error when importing a line with type direct_channel with a nil direct_channel.")
+	}
+
+	// Try import line with direct_post type but nil direct_post.
+	line.Type = "direct_post"
+	if err := ImportLine(line, false); err == nil {
+		t.Fatalf("Expected an error when importing a line with type direct_post with a nil direct_post.")
+	}
 }
 
 func TestImportBulkImport(t *testing.T) {
@@ -1762,13 +2527,21 @@ func TestImportBulkImport(t *testing.T) {
 	teamName := model.NewId()
 	channelName := model.NewId()
 	username := model.NewId()
+	username2 := model.NewId()
+	username3 := model.NewId()
 
 	// Run bulk import with a valid 1 of everything.
 	data1 := `{"type": "version", "version": 1}
 {"type": "team", "team": {"type": "O", "display_name": "lskmw2d7a5ao7ppwqh5ljchvr4", "name": "` + teamName + `"}}
 {"type": "channel", "channel": {"type": "O", "display_name": "xr6m6udffngark2uekvr3hoeny", "team": "` + teamName + `", "name": "` + channelName + `"}}
 {"type": "user", "user": {"username": "` + username + `", "email": "` + username + `@example.com", "teams": [{"name": "` + teamName + `", "channels": [{"name": "` + channelName + `"}]}]}}
-{"type": "post", "post": {"team": "` + teamName + `", "channel": "` + channelName + `", "user": "` + username + `", "message": "Hello World", "create_at": 123456789012}}`
+{"type": "user", "user": {"username": "` + username2 + `", "email": "` + username2 + `@example.com", "teams": [{"name": "` + teamName + `", "channels": [{"name": "` + channelName + `"}]}]}}
+{"type": "user", "user": {"username": "` + username3 + `", "email": "` + username3 + `@example.com", "teams": [{"name": "` + teamName + `", "channels": [{"name": "` + channelName + `"}]}]}}
+{"type": "post", "post": {"team": "` + teamName + `", "channel": "` + channelName + `", "user": "` + username + `", "message": "Hello World", "create_at": 123456789012}}
+{"type": "direct_channel", "direct_channel": {"members": ["` + username + `", "` + username2 + `"]}}
+{"type": "direct_channel", "direct_channel": {"members": ["` + username + `", "` + username2 + `", "` + username3 + `"]}}
+{"type": "direct_post", "direct_post": {"channel_members": ["` + username + `", "` + username2 + `"], "user": "` + username + `", "message": "Hello Direct Channel", "create_at": 123456789013}}
+{"type": "direct_post", "direct_post": {"channel_members": ["` + username + `", "` + username2 + `", "` + username3 + `"], "user": "` + username + `", "message": "Hello Group Channel", "create_at": 123456789014}}`
 
 	if err, line := BulkImport(strings.NewReader(data1), false, 2); err != nil || line != 0 {
 		t.Fatalf("BulkImport should have succeeded: %v, %v", err.Error(), line)

i18n/en.json

@@ -2967,10 +2967,50 @@
     "id": "app.import.import_channel.team_not_found.error",
     "translation": "Error importing channel. Team with name \"{{.TeamName}}\" could not be found."
   },
+  {
+    "id": "app.import.import_direct_channel.member_not_found.error",
+    "translation": "Could not find channel member when importing direct channel"
+  },
+  {
+    "id": "app.import.import_direct_channel.create_direct_channel.error",
+    "translation": "Failed to create direct channel"
+  },
+  {
+    "id": "app.import.import_direct_channel.create_group_channel.error",
+    "translation": "Failed to create group channel"
+  },
+  {
+    "id": "app.import.import_direct_channel.update_header_failed.error",
+    "translation": "Failed to update direct channel header"
+  },
+  {
+    "id": "app.import.import_direct_post.channel_member_not_found.error",
+    "translation": "Could not find channel member when importing direct channel post"
+  },
+  {
+    "id": "app.import.import_direct_channel.create_direct_channel.error",
+    "translation": "Failed to get direct channel"
+  },
+  {
+    "id": "app.import.import_direct_channel.create_group_channel.error",
+    "translation": "Failed to get group channel"
+  },
+  {
+    "id": "app.import.import_direct_post.user_not_found.error",
+    "translation": "Post user does not exist"
+  },
   {
     "id": "app.import.import_line.null_channel.error",
     "translation": "Import data line has type \"channel\" but the channel object is null."
   },
+  {
+    "id": "app.import.import_line.null_direct_channel.error",
+    "translation": "Import data line has type \"direct_channel\" but the direct_channel object is null."
+  },
+  {
+    "id": "app.import.import_line.null_direct_post.error",
+    "translation": "Import data line has type \"direct_post\" but the direct_post object is null."
+  },
   {
     "id": "app.import.import_line.null_post.error",
     "translation": "Import data line has type \"post\" but the post object is null."
@@ -3043,6 +3083,54 @@
     "id": "app.import.validate_channel_import_data.type_missing.error",
     "translation": "Missing required channel property: type."
   },
+  {
+    "id": "app.import.validate_direct_channel_import_data.members_required.error",
+    "translation": "Missing required direct channel property: members"
+  },
+  {
+    "id": "app.import.validate_direct_channel_import_data.members_too_few.error",
+    "translation": "Direct channel members list contains too few items"
+  },
+  {
+    "id": "app.import.validate_direct_channel_import_data.members_too_many.error",
+    "translation": "Direct channel members list contains too many items"
+  },
+  {
+    "id": "app.import.validate_direct_channel_import_data.header_length.error",
+    "translation": "Direct channel header is too long"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.channel_members_required.error",
+    "translation": "Missing required direct post property: channel_members"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.channel_members_too_few.error",
+    "translation": "Direct post channel members list contains too few items"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.channel_members_too_many.error",
+    "translation": "Direct post channel members list contains too many items"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.user_missing.error",
+    "translation": "Missing required direct post property: user"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.message_missing.error",
+    "translation": "Missing required direct post property: message"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.message_length.error",
+    "translation": "Message is too long"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.create_at_missing.error",
+    "translation": "Missing required direct post property: create_at"
+  },
+  {
+    "id": "app.import.validate_direct_post_import_data.create_at_zero.error",
+    "translation": "CreateAt must be greater than 0"
+  },
   {
     "id": "app.import.validate_post_import_data.channel_missing.error",
     "translation": "Missing required Post property: Channel."