* WIP on user groups

* Minor changes to user credential prompt

core/user_group.js

@@ -0,0 +1,93 @@
+/* jslint node: true */
+'use strict';
+
+var userDb			= require('./database.js').dbs.user;
+var Config			= require('./config.js').config;
+
+var async			= require('async');
+var _				= require('lodash');
+
+exports.getGroupsForUser	 	= getGroupsForUser;
+exports.getGroupsByName			= getGroupsByName;
+exports.addUserToGroup			= addUserToGroup;
+exports.addUserToGroups			= addUserToGroups;
+exports.removeUserFromGroup		= removeUserFromGroup;
+
+
+//
+//	user_group
+//	group_id	| group_name
+//
+//
+//	user_group_member
+//	group_id	| user_id
+//	
+//	
+
+
+function getGroupsForUser(userId, cb) {
+	var sql =
+		'SELECT g.group_id, g.group_name ' +
+		'FROM user_group g, user_group_member gm ' +
+		'WHERE g.group_id = gm.group_id AND gm.user_id = ?;';
+
+	var groups = {};	//	id:name
+
+	userDb.each(sql, [ userId ], function dbRow(err, row) {
+		if(err) {
+			cb(err);
+			return;
+		} else {
+			console.log(row);
+			//groups[row.group_id]
+		}
+	},
+	function complete() {
+		cb(null, groups);
+	});
+}
+
+function getGroupsByName(groupNames, cb) {
+	var sql =
+		'SELECT group_id, group_name ' +
+		'FROM user_group ' +
+		'WHERE group_name IN ("' + groupNames.join('","') + '");';
+
+	userDb.all(sql, function allRows(err, rows) {
+		if(err) {
+			cb(err);
+			return;
+		} else {
+			var groups = {};
+			rows.forEach(function row(r) {
+				groups[r.group_id] = r.group_name;
+			});
+			cb(null, groups);
+		}
+	});
+}
+
+function addUserToGroup(userId, groupId, cb) {
+	userDb.run(
+		'REPLACE INTO user_group_member (group_id, user_id) ' +
+		'VALUES(?, ?);',
+		[ groupId, userId ],
+		function complete(err) {
+			cb(err);
+		}
+	);
+}
+
+function addUserToGroups(userId, groups, cb) {
+	async.each(Object.keys(groups), function item(groupId, nextItem) {
+		addUserToGroup(userId, groupId, function added(err) {
+			nextItem(err);
+		});
+	}, function complete(err) {
+		cb(err);
+	});
+}
+
+function removeUserFromGroup(userId, groupId, cb) {
+
+}