closes #1281

category purge, deletes all topics and posts in the category

src/categories/delete.js

@@ -0,0 +1,45 @@
+'use strict';
+
+var async = require('async'),
+	db = require('../database'),
+	threadTools = require('../threadTools');
+
+
+module.exports = function(Categories) {
+
+	Categories.purge = function(cid, callback) {
+
+		Categories.getTopicIds(cid, 0, -1, function(err, tids) {
+			if (err) {
+				return callback(err);
+			}
+
+			async.each(tids, function(tid, next) {
+				threadTools.purge(tid, 0, next);
+			}, function(err) {
+				if (err) {
+					return callback(err);
+				}
+
+				purgeCategory(cid, callback);
+			});
+		});
+	};
+
+	function purgeCategory(cid, callback) {
+		async.parallel([
+			function(next) {
+				db.sortedSetRemove('categories:cid', cid, next);
+			},
+			function(next) {
+				db.delete('categories:' + cid + ':tid', next);
+			},
+			function(next) {
+				db.delete('categories:recent_posts:cid:' + cid, next);
+			},
+			function(next) {
+				db.delete('category:' + cid, next);
+			}
+		], callback);
+	}
+};