[MM-37772] Idiomatic naming (URL, URI, API) (#18128)

* s/Url/URL/g & s/Uri/URI/g

* s/Api/API/g

wsapi/status.go

@@ -9,8 +9,8 @@ import (
 )
 
 func (api *API) InitStatus() {
-	api.Router.Handle("get_statuses", api.ApiWebSocketHandler(api.getStatuses))
-	api.Router.Handle("get_statuses_by_ids", api.ApiWebSocketHandler(api.getStatusesByIds))
+	api.Router.Handle("get_statuses", api.APIWebSocketHandler(api.getStatuses))
+	api.Router.Handle("get_statuses_by_ids", api.APIWebSocketHandler(api.getStatusesByIds))
 }
 
 func (api *API) getStatuses(req *model.WebSocketRequest) (map[string]interface{}, *model.AppError) {

wsapi/system.go

@@ -8,7 +8,7 @@ import (
 )
 
 func (api *API) InitSystem() {
-	api.Router.Handle("ping", api.ApiWebSocketHandler(ping))
+	api.Router.Handle("ping", api.APIWebSocketHandler(ping))
 }
 
 func ping(req *model.WebSocketRequest) (map[string]interface{}, *model.AppError) {

wsapi/user.go

@@ -8,8 +8,8 @@ import (
 )
 
 func (api *API) InitUser() {
-	api.Router.Handle("user_typing", api.ApiWebSocketHandler(api.userTyping))
-	api.Router.Handle("user_update_active_status", api.ApiWebSocketHandler(api.userUpdateActiveStatus))
+	api.Router.Handle("user_typing", api.APIWebSocketHandler(api.userTyping))
+	api.Router.Handle("user_update_active_status", api.APIWebSocketHandler(api.userUpdateActiveStatus))
 }
 
 func (api *API) userTyping(req *model.WebSocketRequest) (map[string]interface{}, *model.AppError) {

wsapi/websocket_handler.go

@@ -12,7 +12,7 @@ import (
 	"github.com/mattermost/mattermost-server/v6/shared/mlog"
 )
 
-func (api *API) ApiWebSocketHandler(wh func(*model.WebSocketRequest) (map[string]interface{}, *model.AppError)) webSocketHandler {
+func (api *API) APIWebSocketHandler(wh func(*model.WebSocketRequest) (map[string]interface{}, *model.AppError)) webSocketHandler {
 	return webSocketHandler{api.App, wh}
 }