Add revision api

Author: jackycute

app.js

@@ -457,6 +457,8 @@ app.get("/p/:shortid", response.showPublishSlide);
 app.get("/:noteId", response.showNote);
 //note actions
 app.get("/:noteId/:action", response.noteActions);
+//note actions with action id
+app.get("/:noteId/:action/:actionId", response.noteActions);
 // response not found if no any route matches
 app.get('*', function (req, res) {
     response.errorNotFound(res);

lib/response.js

@@ -10,6 +10,7 @@ var shortId = require('shortid');
 var metaMarked = require('meta-marked');
 var querystring = require('querystring');
 var request = require('request');
+var moment = require('moment');
 
 //core
 var config = require("./config.js");
@@ -322,6 +323,38 @@ function actionGist(req, res, note) {
     res.redirect("https://github.com/login/oauth/authorize?" + query);
 }
 
+function actionRevision(req, res, note) {
+    var actionId = req.params.actionId;
+    if (actionId) {
+        var time = moment(parseInt(actionId));
+        if (time.isValid()) {
+            models.Revision.getPatchedNoteRevisionByTime(note, time, function (err, content) {
+                if (err) {
+                    logger.error(err);
+                    return response.errorInternalError(res);
+                }
+                if (!content) {
+                    return response.errorNotFound(res);
+                }
+                res.end(JSON.stringify(content));
+            });
+        } else {
+            return response.errorNotFound(res);
+        }
+    } else {
+        models.Revision.getNoteRevisions(note, function (err, data) {
+            if (err) {
+                logger.error(err);
+                return response.errorInternalError(res);
+            }
+            var out = {
+                revision: data
+            };
+            res.end(JSON.stringify(out));
+        });
+    }
+}
+
 function noteActions(req, res, next) {
     var noteId = req.params.noteId;
     findNote(req, res, function (note) {
@@ -343,6 +376,9 @@ function noteActions(req, res, next) {
         case "gist":
             actionGist(req, res, note);
             break;
+        case "revision":
+            actionRevision(req, res, note);
+            break;
         default:
             return res.redirect(config.serverurl + '/' + noteId);
             break;