[MM-18121] Fix config set panic (#13350)

* Fix config set panic

* Add test

* Fix golint issues

Co-authored-by: mattermod <mattermod@users.noreply.github.com>

cmd/mattermost/commands/config.go

@@ -320,10 +320,27 @@ func UpdateMap(configMap map[string]interface{}, configSettings []string, newVal
 		if len(configSettings) == 1 {
 			return errors.New("unable to set multiple settings at once")
 		}
-		if value.Len() == 0 {
+		simpleMap, ok := res.(map[string]interface{})
-			return fmt.Errorf(noSettingsNamed, configSettings[1])
+		if ok {
+			return UpdateMap(simpleMap, configSettings[1:], newVal)
 		}
-		return UpdateMap(res.(map[string]interface{}), configSettings[1:], newVal)
+		mapOfTheMap, ok := res.(map[string]map[string]interface{})
+		if ok {
+			convertedMap := make(map[string]interface{})
+			for k, v := range mapOfTheMap {
+				convertedMap[k] = v
+			}
+			return UpdateMap(convertedMap, configSettings[1:], newVal)
+		}
+		pluginStateMap, ok := res.(map[string]*model.PluginState)
+		if ok {
+			convertedMap := make(map[string]interface{})
+			for k, v := range pluginStateMap {
+				convertedMap[k] = v
+			}
+			return UpdateMap(convertedMap, configSettings[1:], newVal)
+		}
+		return fmt.Errorf(noSettingsNamed, configSettings[1])
 
 	case reflect.Int:
 		if len(configSettings) == 1 {
@@ -372,6 +389,18 @@ func UpdateMap(configMap map[string]interface{}, configSettings []string, newVal
 		}
 		return fmt.Errorf(noSettingsNamed, configSettings[0])
 
+	case reflect.Ptr:
+		state, ok := res.(*model.PluginState)
+		if !ok || len(configSettings) != 2 {
+			return errors.New("type not supported yet")
+		}
+		val, err := strconv.ParseBool(newVal[0])
+		if err != nil {
+			return err
+		}
+		state.Enable = val
+		return nil
+
 	default:
 		return errors.New("type not supported yet")
 	}

cmd/mattermost/commands/config_test.go

@@ -73,6 +73,14 @@ type TestNewTeamSettings struct {
 	MaxUserPerTeam *int
 }
 
+type TestPluginSettings struct {
+	Enable                  *bool
+	Directory               *string `restricted:"true"`
+	Plugins                 map[string]map[string]interface{}
+	PluginStates            map[string]*model.PluginState
+	SignaturePublicKeyFiles []string
+}
+
 func TestConfigValidate(t *testing.T) {
 	th := Setup()
 	defer th.TearDown()
@@ -518,7 +526,6 @@ func TestUpdateMap(t *testing.T) {
 
 		})
 	}
-
 }
 
 func TestConfigMigrate(t *testing.T) {
@@ -574,3 +581,65 @@ func contains(configMap map[string]interface{}, v interface{}, configSettings []
 		return value.Interface() == v
 	}
 }
+
+func TestPluginConfigs(t *testing.T) {
+	pluginConfig := TestPluginSettings{
+		Enable:    model.NewBool(true),
+		Directory: model.NewString("dir"),
+		Plugins: map[string]map[string]interface{}{
+			"antivirus": {
+				"clamavhostport":     "localhost:3310",
+				"scantimeoutseconds": 12,
+			},
+			"com.mattermost.demo-plugin": {
+				"channelname":       "demo_plugin",
+				"customsetting":     "7",
+				"enablementionuser": false,
+				"lastname":          "Plugin User",
+				"mentionuser":       "demo_plugin",
+				"randomsecret":      "random secret",
+				"secretmessage":     "Changed value.",
+				"textstyle":         "",
+				"username":          "demo_plugin",
+			},
+			"com.mattermost.webex": {
+				"sitehost": "praptishrestha.my.webex.com",
+			},
+			"jira": {
+				"enablejiraui":                         true,
+				"groupsallowedtoeditjirasubscriptions": "",
+				"rolesallowedtoeditjirasubscriptions":  "system_admin",
+				"secret":                               "some secret",
+			},
+			"mattermost-autolink": {
+				"enableadmincommand": false,
+			},
+		},
+		PluginStates: map[string]*model.PluginState{
+			"antivirus": {
+				Enable: false,
+			},
+			"com.github.manland.mattermost-plugin-gitlab": {
+				Enable: true,
+			},
+		},
+		SignaturePublicKeyFiles: []string{"Hello", "World"},
+	}
+
+	configMap := configToMap(pluginConfig)
+	err := UpdateMap(configMap, []string{"Enable"}, []string{"false"})
+	require.Nil(t, err, "Wasn't expecting an error")
+	assert.Equal(t, false, configMap["Enable"].(bool))
+
+	err = UpdateMap(configMap, []string{"Plugins", "antivirus", "clamavhostport"}, []string{"some text"})
+	require.Nil(t, err, "Wasn't expecting an error")
+	assert.Equal(t, "some text", configMap["Plugins"].(map[string]map[string]interface{})["antivirus"]["clamavhostport"].(string))
+
+	err = UpdateMap(configMap, []string{"Plugins", "mattermost-autolink", "enableadmincommand"}, []string{"true"})
+	require.Nil(t, err, "Wasn't expecting an error")
+	assert.Equal(t, true, configMap["Plugins"].(map[string]map[string]interface{})["mattermost-autolink"]["enableadmincommand"].(bool))
+
+	err = UpdateMap(configMap, []string{"PluginStates", "antivirus", "Enable"}, []string{"true"})
+	require.Nil(t, err, "Wasn't expecting an error")
+	assert.Equal(t, true, configMap["PluginStates"].(map[string]*model.PluginState)["antivirus"].Enable)
+}