implement custom welcome message (#820)

* implement custom welcome message

This change adds logic for handling custom welcome messages.

* trim welcome message string on POST

Instead of trimming the welcome message every time we are going to send to send
a welcome message, we just trim once when the message is posted from the admin.

core/data/config.go

@@ -16,6 +16,7 @@ const streamTitleKey = "stream_title"
 const streamKeyKey = "stream_key"
 const logoPathKey = "logo_path"
 const serverSummaryKey = "server_summary"
+const serverWelcomeMessageKey = "server_welcome_message"
 const serverNameKey = "server_name"
 const serverURLKey = "server_url"
 const httpPortNumberKey = "http_port_number"
@@ -119,6 +120,22 @@ func SetServerSummary(summary string) error {
 	return _datastore.SetString(serverSummaryKey, summary)
 }
 
+// GetServerWelcomeMessage will return the server welcome message text.
+func GetServerWelcomeMessage() string {
+	welcomeMessage, err := _datastore.GetString(serverWelcomeMessageKey)
+	if err != nil {
+		log.Debugln(serverWelcomeMessageKey, err)
+		return config.GetDefaults().ServerWelcomeMessage
+	}
+
+	return welcomeMessage
+}
+
+// SetServerWelcomeMessage will set the server welcome message text.
+func SetServerWelcomeMessage(welcomeMessage string) error {
+	return _datastore.SetString(serverWelcomeMessageKey, welcomeMessage)
+}
+
 // GetServerName will return the server name text.
 func GetServerName() string {
 	name, err := _datastore.GetString(serverNameKey)

core/data/defaults.go

@@ -28,6 +28,7 @@ func PopulateDefaults() {
 	_ = SetLogoPath(defaults.Logo)
 	_ = SetServerMetadataTags([]string{"owncast", "streaming"})
 	_ = SetServerSummary("Welcome to your new Owncast server!  This description can be changed in the admin")
+	_ = SetServerWelcomeMessage("")
 	_ = SetServerName("Owncast")
 	_ = SetStreamKey(defaults.StreamKey)
 	_ = SetExtraPageBodyContent("This is your page's content that can be edited in the admin.")