Fix setting recording info via HTTP

Author: medengineer

Source/UI/ControlPanel.cpp

@@ -1208,7 +1208,7 @@ void ControlPanel::setRecordingDirectoryPrependText(String text)
                     field->state = FilenameFieldComponent::State::AUTO;
                 else
                 {
-                    String errString = FilenameFieldComponent::validate(text);
+                    String errString = field->validate(text);
                     if (errString.length())
                         return; //TODO: Notify user of error via HTTPServer
                     field->state = FilenameFieldComponent::State::CUSTOM;
@@ -1251,7 +1251,7 @@ void ControlPanel::setRecordingDirectoryAppendText(String text)
                     field->state = FilenameFieldComponent::State::AUTO;
                 else
                 {
-                    String errString = FilenameFieldComponent::validate(text);
+                    String errString = field->validate(text);
                     if (errString.length())
                         return; //TODO: Notify user of error via HTTPServer
                     field->state = FilenameFieldComponent::State::CUSTOM;
@@ -1295,7 +1295,7 @@ void ControlPanel::setRecordingDirectoryBaseText(String text)
 
                 else if ( text.length() > 0 )
                 {
-                    String errString = FilenameFieldComponent::validate(text);
+                    String errString = field->validate(text);
                     if (errString.length())
                         return; //TODO: Notify user of error via HTTPServer
                     field->state = FilenameFieldComponent::State::CUSTOM;

Source/UI/FilenameConfigWindow.cpp

@@ -80,7 +80,7 @@ String FilenameFieldComponent::validate(String candidate)
 
     String errorStr = "";
 
-    if (candidate.length() == 0)
+    if (candidate.length() == 0 && state != State::NONE)
         errorStr = "File name must have at least 1 character.";
 
     if (candidate.contains(File::getSeparatorString()))

Source/UI/FilenameConfigWindow.h

@@ -73,7 +73,7 @@ class FilenameFieldComponent :
     String getNextValue(bool usePlaceholderText);
 
     /** Validate filename field candidate */
-    static String validate(String field);
+    String validate(String field);
 
     Type type;
     State state;