* Add system_property.js

core/system_property.js

@@ -0,0 +1,38 @@
+/* jslint node: true */
+'use strict';
+
+var sysDb						= require('./database.js').dbs.system;
+
+exports.loadSystemProperties	= loadSystemProperties;
+exports.persistSystemProperty	= persistSystemProperty;
+exports.getSystemProperty		= getSystemProperty;
+
+var systemProperties = {};
+exports.systemProperties 	= systemProperties;
+
+function loadSystemProperties(cb) {
+	sysDb.each(
+		'SELECT prop_name, prop_value '	+
+		'FROM system_property;',
+		function rowResult(err, row) {
+			systemProperties[row.prop_name] = row.prop_value;
+		},
+		cb
+	);
+}
+
+function persistSystemProperty(propName, propValue, cb) {
+	//	update live
+	systemProperties[propName] = propValue;
+
+	sysDb.run(
+		'REPLACE INTO system_property '			+
+		'VALUES (?, ?);',
+		[ propName, propValue ],
+		cb
+	);
+}
+
+function getSystemProperty(propName) {
+	return systemProperties[propName];
+}