MM-8604: emit config/license websocket events (#8371)

app/app.go

@@ -131,8 +131,24 @@ func New(options ...Option) (outApp *App, outErr error) {
 
 	app.configListenerId = app.AddConfigListener(func(_, _ *model.Config) {
 		app.configOrLicenseListener()
+
+		message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_CONFIG_CHANGED, "", "", "", nil)
+
+		message.Add("config", app.ClientConfigWithNoAccounts())
+		app.Go(func() {
+			app.Publish(message)
+		})
+	})
+	app.licenseListenerId = app.AddLicenseListener(func() {
+		app.configOrLicenseListener()
+
+		message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_LICENSE_CHANGED, "", "", "", nil)
+		message.Add("license", app.GetSanitizedClientLicense())
+		app.Go(func() {
+			app.Publish(message)
+		})
+
 	})
-	app.licenseListenerId = app.AddLicenseListener(app.configOrLicenseListener)
 	app.regenerateClientConfig()
 	app.setDefaultRolesBasedOnConfig()
 

app/config.go

@@ -14,6 +14,7 @@ import (
 	"fmt"
 	"net/url"
 	"runtime/debug"
+	"strconv"
 	"strings"
 
 	l4g "github.com/alecthomas/log4go"
@@ -34,6 +35,7 @@ func (a *App) UpdateConfig(f func(*model.Config)) {
 	updated := old.Clone()
 	f(updated)
 	a.config.Store(updated)
+
 	a.InvokeConfigListeners(old, updated)
 }
 
@@ -269,3 +271,16 @@ func (a *App) GetCookieDomain() string {
 func (a *App) GetSiteURL() string {
 	return a.siteURL
 }
+
+// ClientConfigWithNoAccounts gets the configuration in a format suitable for sending to the client.
+func (a *App) ClientConfigWithNoAccounts() map[string]string {
+	respCfg := map[string]string{}
+	for k, v := range a.ClientConfig() {
+		respCfg[k] = v
+	}
+
+	// NoAccounts is not actually part of the configuration, but is expected by the client.
+	respCfg["NoAccounts"] = strconv.FormatBool(a.IsFirstUserAccount())
+
+	return respCfg
+}

app/config_test.go

@@ -63,3 +63,13 @@ func TestAsymmetricSigningKey(t *testing.T) {
 	assert.NotNil(t, th.App.AsymmetricSigningKey())
 	assert.NotEmpty(t, th.App.ClientConfig()["AsymmetricSigningPublicKey"])
 }
+
+func TestClientConfigWithNoAccounts(t *testing.T) {
+	th := Setup().InitBasic()
+	defer th.TearDown()
+
+	config := th.App.ClientConfigWithNoAccounts()
+	if _, ok := config["NoAccounts"]; !ok {
+		t.Fatal("expected NoAccounts in returned config")
+	}
+}