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/api4/import.go

@@ -0,0 +1,33 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package api4
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/mattermost/mattermost-server/v6/model"
+	"github.com/mattermost/mattermost-server/v6/server/platform/shared/mlog"
+)
+
+func (api *API) InitImport() {
+	api.BaseRoutes.Imports.Handle("", api.APISessionRequired(listImports)).Methods("GET")
+}
+
+func listImports(c *Context, w http.ResponseWriter, r *http.Request) {
+	if !c.IsSystemAdmin() {
+		c.SetPermissionError(model.PermissionManageSystem)
+		return
+	}
+
+	imports, appErr := c.App.ListImports()
+	if appErr != nil {
+		c.Err = appErr
+		return
+	}
+
+	if err := json.NewEncoder(w).Encode(imports); err != nil {
+		c.Logger.Warn("Error writing imports", mlog.Err(err))
+	}
+}