require ("Application");

class ExportTags Application
{
	// An array containing all domains that should be exported, if only one domain 
	// should be exported the array will only contain a single entry
	domainsToExport = array("default","default2");
	
	// The direcotry where the export files should be created
	exportFilePath = "C:\\users\\mholbach\\desktop\\";
	
	// The base of the file name - will be appended with _<DomainName>
	exportFileBase = "exportFile";
	
	// The extension on the export file
	exportFileType = ".txt";
}

/* Write the 'main line' of the program here. */
method ExportTags.constructor ()
{
	// Loop through the array of domains
	with domain in .domainsToExport do
	{
		// Read all points from the domain
		local arrayOfPoints = datahub_points(domain);
		
		// If we can open the export file
		if ((fw = open(string(.exportFilePath,.exportFileBase,"_",domain,.exportFileType), "w", nil)) != nil)
		{
			// Loop through all points in the array
			with point in arrayOfPoints do
			{
				// Write the point name to file
				writec(fw, string(point.name,"\n"));
			}
			close(fw);
		}
		else
		{
			princ("Error opening file ",string(.exportFilePath,.exportFileBase,"_",domain,.exportFileType)," for writing.\n");
		}
	}
}

/* Any code to be run when the program gets shut down. */
method ExportTags.destructor ()
{
}

/* Start the program by instantiating the class.  If your
 * constructor code does not create a persistent reference to
 * the instance (self), then it will be destroyed by the
 * garbage collector soon after creation.  If you do not want
 * this to happen, assign the instance to a global variable, or
 * create a static data member in your class to which you assign
 * 'self' during the construction process.  ApplicationSingleton()
 * does this for you automatically. */
ApplicationSingleton (ExportTags);