Added API to return user count bands and user count (#25796)

server/channels/api4/api.go

@@ -141,6 +141,8 @@ type Routes struct {
 	IPFiltering *mux.Router // 'api/v4/ip_filtering'
 
 	Reports *mux.Router // 'api/v4/reports'
+
+	Limits *mux.Router // 'api/v4/limits'
 }
 
 type API struct {
@@ -269,6 +271,8 @@ func Init(srv *app.Server) (*API, error) {
 
 	api.BaseRoutes.Reports = api.BaseRoutes.APIRoot.PathPrefix("/reports").Subrouter()
 
+	api.BaseRoutes.Limits = api.BaseRoutes.APIRoot.PathPrefix("/limits").Subrouter()
+
 	api.InitUser()
 	api.InitBot()
 	api.InitTeam()
@@ -314,6 +318,7 @@ func Init(srv *app.Server) (*API, error) {
 	api.InitDrafts()
 	api.InitIPFiltering()
 	api.InitReports()
+	api.InitLimits()
 
 	srv.Router.Handle("/api/v4/{anything:.*}", http.HandlerFunc(api.Handle404))
 

server/channels/api4/limits.go

@@ -0,0 +1,34 @@
+// 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/public/model"
+
+	"github.com/mattermost/mattermost/server/public/shared/mlog"
+)
+
+func (api *API) InitLimits() {
+	api.BaseRoutes.Limits.Handle("/users", api.APISessionRequired(getUserLimits)).Methods("GET")
+}
+
+func getUserLimits(c *Context, w http.ResponseWriter, r *http.Request) {
+	if !(c.IsSystemAdmin() && c.App.SessionHasPermissionTo(*c.AppContext.Session(), model.PermissionSysconsoleReadUserManagementUsers)) {
+		c.SetPermissionError(model.PermissionSysconsoleReadUserManagementUsers)
+		return
+	}
+
+	userLimits, err := c.App.GetUserLimits()
+	if err != nil {
+		c.Err = err
+		return
+	}
+
+	if err := json.NewEncoder(w).Encode(userLimits); err != nil {
+		c.Logger.Error("Error writing user limits response", mlog.Err(err))
+	}
+}