Added saved revisions support

node/db/Pad.js

@@ -13,6 +13,7 @@ var padManager = require("./PadManager");
 var padMessageHandler = require("../handler/PadMessageHandler");
 var readOnlyManager = require("./ReadOnlyManager");
 var crypto = require("crypto");
+var randomString = require("../utils/randomstring");
 
 /**
  * Copied from the Etherpad source code. It converts Windows line breaks to Unix line breaks and convert Tabs to spaces
@@ -32,7 +33,7 @@ var Pad = function Pad(id) {
   this.publicStatus = false;
   this.passwordHash = null;
   this.id = id;
-
+  this.savedRevisions = [];
 };
 
 exports.Pad = Pad;
@@ -466,6 +467,31 @@ Pad.prototype.isPasswordProtected = function isPasswordProtected() {
   return this.passwordHash != null;
 };
 
+Pad.prototype.addSavedRevision = function addSavedRevision(revNum, savedById, label) {
+  //if this revision is already saved, return silently
+  for(var i in this.savedRevisions){
+    if(this.savedRevisions.revNum === revNum){
+      return;
+    }
+  }
+  
+  //build the saved revision object
+  var savedRevision = {};
+  savedRevision.revNum = revNum;
+  savedRevision.savedById = savedById;
+  savedRevision.label = label || "Revision " + revNum;
+  savedRevision.timestamp = new Date().getTime();
+  savedRevision.id = randomString(10);
+  
+  //save this new saved revision
+  this.savedRevisions.push(savedRevision);
+  this.saveToDatabase();
+};
+
+Pad.prototype.getSavedRevisions = function getSavedRevisions() {
+  return this.savedRevisions;
+};
+
 /* Crypto helper methods */
 
 function hash(password, salt)

node/handler/PadMessageHandler.js

@@ -184,6 +184,11 @@ exports.handleMessage = function(client, message)
   {
     handleChatMessage(client, message);
   }
+  else if(message.type == "COLLABROOM" && 
+          message.data.type == "SAVE_REVISION")
+  {
+    handleSaveRevisionMessage(client, message);
+  }
   else if(message.type == "COLLABROOM" && 
           message.data.type == "CLIENT_MESSAGE" &&
           message.data.payload.type == "suggestUserName")
@@ -197,6 +202,23 @@ exports.handleMessage = function(client, message)
   }
 }
 
+/**
+ * Handles a save revision message
+ * @param client the client that send this message
+ * @param message the message from the client
+ */
+function handleSaveRevisionMessage(client, message){
+  var padId = session2pad[client.id];
+  var userId = sessioninfos[client.id].author;
+  
+  padManager.getPad(padId, function(err, pad)
+  {
+    if(ERR(err)) return;
+    
+    pad.addSavedRevision(pad.head, userId);
+  });
+}
+
 /**
  * Handles a Chat Message
  * @param client the client that send this message

node/handler/TimesliderMessageHandler.js

@@ -165,6 +165,7 @@ function createTimesliderClientVars (padId, callback)
     hooks: [],
     initialStyledContents: {}
   };
+  
   var pad;
   var initialChangesets = [];
 
@@ -179,6 +180,12 @@ function createTimesliderClientVars (padId, callback)
         callback();
       });
     },
+    //get all saved revisions and add them
+    function(callback)
+    {
+      clientVars.savedRevisions = pad.getSavedRevisions();
+      callback();
+    },
     //get all authors and add them to 
     function(callback)
     {