MM-57824: Export/import custom status (#27361)

https://mattermost.atlassian.net/browse/MM-57824
```release-note
NONE
```

Co-authored-by: Mattermost Build <build@mattermost.com>

server/channels/app/export.go

@@ -469,6 +469,11 @@ func (a *App) exportAllUsers(ctx request.CTX, job *model.Job, writer io.Writer,
 
 			userLine.User.NotifyProps = a.buildUserNotifyProps(user.NotifyProps)
 
+			// Adding custom status
+			if cs := user.GetCustomStatus(); cs != nil {
+				userLine.User.CustomStatus = cs
+			}
+
 			// Do the Team Memberships.
 			members, err := a.buildUserTeamAndChannelMemberships(ctx, user.Id, includeArchivedChannels)
 			if err != nil {

server/channels/app/export_test.go

@@ -10,6 +10,7 @@ import (
 	"path/filepath"
 	"sort"
 	"testing"
+	"time"
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -574,6 +575,40 @@ func TestExportPostWithProps(t *testing.T) {
 	assert.Contains(t, posts[1].Props["attachments"].([]any)[0], "footer")
 }
 
+func TestExportUserCustomStatus(t *testing.T) {
+	th1 := Setup(t).InitBasic()
+
+	cs := &model.CustomStatus{
+		Emoji:     "palm_tree",
+		Text:      "on a vacation",
+		Duration:  "this_week",
+		ExpiresAt: time.Now().Add(24 * time.Hour),
+	}
+	appErr := th1.App.SetCustomStatus(th1.Context, th1.BasicUser.Id, cs)
+	require.Nil(t, appErr)
+
+	uname := th1.BasicUser.Username
+
+	var b bytes.Buffer
+	appErr = th1.App.BulkExport(th1.Context, &b, "somePath", nil, model.BulkExportOpts{})
+	require.Nil(t, appErr)
+
+	th1.TearDown()
+
+	th2 := Setup(t)
+	defer th2.TearDown()
+
+	appErr, i := th2.App.BulkImport(th2.Context, &b, nil, false, 1)
+	require.Nil(t, appErr)
+	assert.Equal(t, 0, i)
+
+	gotUser, err := th2.Server.Store().User().GetByUsername(uname)
+	require.NoError(t, err)
+	gotCs := gotUser.GetCustomStatus()
+	require.Equal(t, cs.Emoji, gotCs.Emoji)
+	require.Equal(t, cs.Text, gotCs.Text)
+}
+
 func TestExportDMPostWithSelf(t *testing.T) {
 	th1 := Setup(t).InitBasic()
 

server/channels/app/import_functions.go

@@ -536,6 +536,12 @@ func (a *App) importUser(rctx request.CTX, data *imports.UserImportData, dryRun
 		}
 	}
 
+	if data.CustomStatus != nil {
+		if err := user.SetCustomStatus(data.CustomStatus); err != nil {
+			return model.NewAppError("importUser", "app.import.custom_status.error", nil, "", http.StatusBadRequest).Wrap(err)
+		}
+	}
+
 	var savedUser *model.User
 	var err error
 	if user.Id == "" {

server/channels/app/imports/import_types.go

@@ -86,6 +86,7 @@ type UserImportData struct {
 	EmailInterval       *string `json:"email_interval,omitempty"`
 
 	NotifyProps  *UserNotifyPropsImportData `json:"notify_props,omitempty"`
+	CustomStatus *model.CustomStatus        `json:"custom_status,omitempty"`
 }
 
 type UserNotifyPropsImportData struct {

server/i18n/en.json

@@ -5122,6 +5122,10 @@
     "id": "app.import.bulk_import.unsupported_version.error",
     "translation": "Incorrect or missing version in the data import file. Make sure version is the first object in your import file and try again."
   },
+  {
+    "id": "app.import.custom_status.error",
+    "translation": "Unable to set custom status."
+  },
   {
     "id": "app.import.emoji.bad_file.error",
     "translation": "Error reading import emoji image file. Emoji with name: \"{{.EmojiName}}\""