Basic regex replace support [#154]

modules/regex/config.json

@@ -0,0 +1,3 @@
+{
+    "ignorable": true
+}

modules/regex/regex.js

@@ -0,0 +1,26 @@
+var _ = require('underscore')._;
+
+var regex = function(dbot) {
+    this.last = {};
+    this.listener = function(event) {
+        var q = event.message.valMatch(/^s\/(.+)\/(.+)\/$/, 3);
+        if(q) {
+            var toMatch = new RegExp(q[1]);
+            var replaceWith = q[2];
+            var last = this.last[event.channel.name][event.user];
+            event.reply(event.user + " meant: " + last.replace(toMatch, replaceWith));
+        } else {
+            if(_.has(this.last, event.channel.name)) {
+               this.last[event.channel.name][event.user] = event.message; 
+            } else {
+                this.last[event.channel.name] = { };
+                this.last[event.channel.name][event.user] = event.message;
+            }
+        }
+    }.bind(this);
+    this.on = [ 'PRIVMSG' ];
+};
+
+exports.fetch = function(dbot) {
+    return new regex(dbot);
+};