The 'Client logged in' and 'Client reloaded' events (see Login (Events)) are selected as Triggering events for event handling.

The Validating rule uses an Entity property rule to determine whether the agreed directory contains a message for the current calendar day:

• A Concat strings value resolver builds the current-day file path. The Format date value resolver is concatenated with the Relative date with time value resolver (collapsed in the image) to output the system date ('Now') in the format yyyyMMdd.
  
  

• If there is a file in the specified path, the File reference value resolver returns it as a 'Content' object. Within the Validating rule, only the 'non-empty' return value is of interest. As a precaution, however, the return value is stored in the file variable by the Store value as variable value resolver, so that the file does not have to be read again when successful.
  
  

• The only Action on passed rule displays the message by a Show alert (Popup) event action that reads the file content (body) from the file variable and 'edits' it via the concatenated Right trim, in order to remove whitespace at the end of the file, if necessary.

►NOTE◄

• For the Type 'Alert', the Close after (seconds) setting is irrelevant, because the displayed message dialog can only be closed interactively (by clicking on 'OK').
  
  

• Since the string representation of a text file (in a 'Content' object) is by definition the plaintext of the file, the Object property value resolver for the body could be omitted here. Its return value (of the byte[] type) effectively provides the same string as input value for the Right trim value resolver.