* New ACS class avail @ client.acs

* Experimental / WIP work on issue #79
* Issue # 77: Changes to new_scan.js, temp conf/area swapping, etc.
* message area: getMessageConfByAreaTag(), getMessageConfTagByAreaTag(), tempChangeMessageConfAndArea(), getNewMessageCountInAreaForUser()

core/acs.js

@@ -0,0 +1,53 @@
+/* jslint node: true */
+'use strict';
+
+//	ENiGMA½
+const checkAcs	= require('./acs_parser.js').parse;
+
+//	deps
+const assert	= require('assert');
+const _			= require('lodash');
+
+class ACS {
+	constructor(client) {
+		this.client = client;
+	}
+	
+	check(acs, scope, defaultAcs) {
+		acs = acs ? acs[scope] : defaultAcs;
+		acs = acs || defaultAcs;
+		return checkAcs(acs, { client : this.client } );		
+	}
+
+	hasMessageConfRead(conf) {
+		return this.check(conf.acs, 'read', ACS.Defaults.MessageConfRead);
+	}
+
+	hasMessageAreaRead(area) {
+		return this.check(area.acs, 'read', ACS.Defaults.MessageAreaRead);
+	}
+
+	getConditionalValue(condArray, memberName) {
+		assert(_.isArray(condArray));
+		assert(_.isString(memberName));
+
+		const matchCond = condArray.find( cond => {
+			if(_.has(cond, 'acs')) {
+				return checkAcs(cond.acs, { client : this.client } );
+			} else {
+				return true;	//	no acs check req.
+			}
+		});
+
+		if(matchCond) {
+			return matchCond[memberName];
+		}
+	}
+}
+
+ACS.Defaults = {
+	MessageAreaRead		: 'GM[users]',
+	MessageConfRead		: 'GM[users]',
+};
+
+module.exports = ACS;