support custom tips in login page

pkg/api/server_settings.go

@@ -41,6 +41,11 @@ func (a *ServerSettingsApi) ServerSettingsJavascriptHandler(c *core.WebContext)
 	a.appendBooleanSetting(builder, "s", config.EnableScheduledTransaction)
 	a.appendBooleanSetting(builder, "e", config.EnableDataExport)
 	a.appendBooleanSetting(builder, "i", config.EnableDataImport)
+
+	if config.LoginPageTips.Enabled {
+		a.appendMultiLanguageTipSetting(builder, "lpt", config.LoginPageTips)
+	}
+
 	a.appendStringSetting(builder, "m", config.MapProvider)
 
 	if config.EnableMapDataFetchProxy &&
@@ -118,6 +123,26 @@ func (a *ServerSettingsApi) appendStringSetting(builder *strings.Builder, key st
 	builder.WriteString(";\n")
 }
 
+func (a *ServerSettingsApi) appendMultiLanguageTipSetting(builder *strings.Builder, key string, value settings.TipConfig) {
+	builder.WriteString(ezbookkeepingServerSettingsGlobalVariableFullName)
+	builder.WriteString("[")
+	a.appendEncodedString(builder, key)
+	builder.WriteString("]={\n")
+
+	builder.WriteString("'default'")
+	builder.WriteRune(':')
+	a.appendEncodedString(builder, value.DefaultContent)
+
+	for languageTag, content := range value.MultiLanguageContent {
+		builder.WriteString(",\n")
+		a.appendEncodedString(builder, languageTag)
+		builder.WriteRune(':')
+		a.appendEncodedString(builder, content)
+	}
+
+	builder.WriteString("\n};\n")
+}
+
 func (a *ServerSettingsApi) appendBooleanSetting(builder *strings.Builder, key string, value bool) {
 	builder.WriteString(ezbookkeepingServerSettingsGlobalVariableFullName)
 	builder.WriteString("[")

pkg/settings/setting.go

@@ -181,6 +181,13 @@ type MinIOConfig struct {
 	RootPath        string
 }
 
+// TipConfig represents a tip setting config
+type TipConfig struct {
+	Enabled              bool
+	DefaultContent       string
+	MultiLanguageContent map[string]string
+}
+
 // NotificationConfig represents a notification setting config
 type NotificationConfig struct {
 	Enabled              bool
@@ -289,6 +296,9 @@ type Config struct {
 	EnableDataImport  bool
 	MaxImportFileSize uint32
 
+	// Tip
+	LoginPageTips TipConfig
+
 	// Notification
 	AfterRegisterNotification NotificationConfig
 	AfterLoginNotification    NotificationConfig
@@ -408,6 +418,12 @@ func LoadConfiguration(configFilePath string) (*Config, error) {
 		return nil, err
 	}
 
+	err = loadTipConfiguration(config, cfgFile, "tip")
+
+	if err != nil {
+		return nil, err
+	}
+
 	err = loadNotificationConfiguration(config, cfgFile, "notification")
 
 	if err != nil {
@@ -780,6 +796,12 @@ func loadDataConfiguration(config *Config, configFile *ini.File, sectionName str
 	return nil
 }
 
+func loadTipConfiguration(config *Config, configFile *ini.File, sectionName string) error {
+	config.LoginPageTips = getTipConfiguration(configFile, sectionName, "enable_tips_in_login_page", "login_page_tips_content")
+
+	return nil
+}
+
 func loadNotificationConfiguration(config *Config, configFile *ini.File, sectionName string) error {
 	config.AfterRegisterNotification = getNotificationConfiguration(configFile, sectionName, "enable_notification_after_register", "after_register_notification_content")
 	config.AfterLoginNotification = getNotificationConfiguration(configFile, sectionName, "enable_notification_after_login", "after_login_notification_content")
@@ -908,6 +930,27 @@ func getFinalPath(workingPath, p string) (string, error) {
 	return p, err
 }
 
+func getTipConfiguration(configFile *ini.File, sectionName string, enableKey string, contentKey string) TipConfig {
+	config := TipConfig{
+		Enabled:              getConfigItemBoolValue(configFile, sectionName, enableKey, false),
+		DefaultContent:       getConfigItemStringValue(configFile, sectionName, contentKey, ""),
+		MultiLanguageContent: make(map[string]string),
+	}
+
+	for languageTag := range locales.AllLanguages {
+		multiLanguageContentKey := strings.ToLower(languageTag)
+		multiLanguageContentKey = strings.Replace(multiLanguageContentKey, "-", "_", -1)
+		multiLanguageContentKey = contentKey + "_" + multiLanguageContentKey
+		content := getConfigItemStringValue(configFile, sectionName, multiLanguageContentKey, "")
+
+		if content != "" {
+			config.MultiLanguageContent[languageTag] = content
+		}
+	}
+
+	return config
+}
+
 func getNotificationConfiguration(configFile *ini.File, sectionName string, enableKey string, contentKey string) NotificationConfig {
 	config := NotificationConfig{
 		Enabled:              getConfigItemBoolValue(configFile, sectionName, enableKey, false),