relocate and rename Storage.js. implement a simple, non-persistent in memory datastore for those who'd rather not bother with mongodb. Continue to default to previous values.

storage/amnesia.js

@@ -0,0 +1,48 @@
+console.log("Loading amnesiadb. This is a horrible idea in production, as data *will not* persist\n");
+
+/*
+    As the comment says, this module does nothing to make your data persist
+    across sessions. If your process crashes for any reason, all pads will die.
+
+    This might be useful if you want to debug other parts of the codebase, if
+    you want to test out cryptpad without installing mongodb locally, or if
+    you don't want to rely on a remote db like the one at mongolab.com.
+
+    Maybe you just like the idea of a forgetful pad? To use this module, edit
+    config.js to include a directive `storage: './storage/amnesia'
+
+    Enjoy!
+*/
+
+var db=[],
+    index=0;
+
+var insert = function(channelName, content, cb){
+    var val = {
+        id:index++,
+        chan: channelName,
+        msg: content,
+        time: new Date().getTime(),
+    };
+    db.push(val);
+    cb();
+};
+
+var getMessages = function(channelName, cb){
+    db.sort(function(a,b){
+        return a.id - b.id;
+    });
+    db.filter(function(val){
+        return val.chan == channelName;
+    }).forEach(function(doc){
+        console.log(doc);
+        cb(doc.msg);
+    });
+};
+
+module.exports.create = function(conf, cb){
+    cb({
+        message: insert,
+        getMessages: getMessages,
+    });
+};

storage/mongo.js

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2014 XWiki SAS
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+var MongoClient = require('mongodb').MongoClient;
+
+var MONGO_URI = "mongodb://demo_user:demo_password@ds027769.mongolab.com:27769/demo_database";
+var COLLECTION_NAME = 'cryptpad';
+
+var insert = function (coll, channelName, content, cb) {
+    var val = {chan: channelName, msg:content, time: (new Date()).getTime()};
+    coll.insertOne(val, {}, function (err, r) {
+        console.log(r);
+        if (err || (r.insertedCount !== 1)) {
+            console.log('failed to insert ' + err);
+            return;
+        }
+        cb();
+    });
+};
+
+var getMessages = function (coll, channelName, cb) {
+    // find entries with a matching channelname
+    coll.find({chan:channelName})
+    // sort by _id, ascending
+    .sort( { _id: 1 } )
+    // iterate over entries
+    .forEach(function (doc) {
+        cb(doc.msg);
+    }, function (err) {
+        if (!err) { return; }
+        console.log('error ' + err);
+    });
+};
+
+module.exports.create = function (conf, cb) {
+    MongoClient.connect(conf.mongoUri, function(err, db) {
+        var coll = db.collection(conf.mongoCollectionName);
+        if (err) { throw err; }
+        cb({
+            message: function (channelName, content, cb) {
+                insert(coll, channelName, content, cb);
+            },
+            getMessages: function (channelName, msgHandler) {
+                getMessages(coll, channelName, msgHandler);
+            }            
+        });
+    });
+};