Fixes fossasia#342: adding support for sending notification if access…

… token revoked

app.js

@@ -8,7 +8,8 @@ var passport = require("passport");
 var dotenv = require("dotenv");
 var session = require("express-session");
 var mongoose = require("mongoose");
-
+var task = require("./backend/task");
+var cron = require('node-cron');
 dotenv.config({path: './.env'});
 require('./util/passport')(passport);
 
@@ -96,6 +97,13 @@ io.on('connection', function(socket){
   })
 });
 
+
+// Tasks runs on every 24 hrs
+
+cron.schedule('* 23 * * *', function(){
+  task.checkExpiredToken();
+});
+
 // catch 404 and forward to error handler
 app.use(function(req, res, next) {
   res.status(404);

backend/github.js

@@ -263,3 +263,24 @@ exports.getRepositoryBranches = function (name, callback) {
     }
   });
 };
+/**  
+ * Get user details by access token
+ * @param accessToken: Access Token of the user
+ * @param callback: callback
+ */
+
+exports.retriveUser = function (accessToken, callback) {
+  request({
+    url: 'https://api.github.com/users/',
+    headers: {
+      'User-Agent': 'Yaydoc',
+      'Authorization': 'token ' + crypter.decrypt(accessToken)
+    }
+  }, function (error, response, body) {
+    if (response.status !== 200) {
+      callback({statusCode: response.status}, null);
+    } else {
+      callback(error, JSON.parse(body));
+    }
+  })
+};

backend/mailer.js

@@ -74,3 +74,24 @@ exports.sendMailOnBuild = function (buildStatus, email, repository) {
     }
   });
 };
+
+exports.sendMailOnTokenFailure = function (email) {
+  var client = nodemailer.createTransport(sgTransport(options));
+
+  var textContent = 'Access token for Yaydoc is expired. Sign in once again to continue the service';
+  var htmlContent = 'Access token for Yaydoc is expired. Sign in once again to continue the service';
+
+  client.sendMail({
+    from: '[email protected]',
+    to: email,
+    subject: 'Token expired - Yaydoc',
+    text: textContent,
+    html: htmlContent
+  }, function (error, info) {
+    if (error) {
+      console.log(error);
+    } else {
+      console.log('Message sent: ' + info.response);
+    }
+  });
+};

backend/queue.js

@@ -0,0 +1,27 @@
+const github = require("./github.js");
+const mailer = require("./mailer");
+const async = require("async");
+User = require("../model/user");
+var tokenRevokedQueue = async.queue(function (user, done) {
+  github.retriveUser(user.token, function (error, userData) {
+    if (error) {
+      if (user.expired === false) {
+        mailer.sendMailOnTokenFailure(user.email);
+        User.updateUserById(user.id, {
+          expired: true
+        }, function(error, data) {
+          if (error) {
+            console.log(error);
+          }
+        });
+      }
+      done();
+    } else {
+      done();
+    }
+  })
+}, 2);
+
+exports.addTokenRevokedJob = function(user) {
+  tokenRevokedQueue.push(user);
+};

backend/task.js

@@ -0,0 +1,34 @@
+const github = require("./github")
+const queue = require("./queue")
+
+User = require("../model/user");
+
+exports.checkExpiredToken = function () {
+  User.count(function (error, count) {
+    if (error) {
+      console.log(error);
+    } else {
+      var page = 0;
+      if (count < 10) {
+        page = 1;
+      } else {
+        page = count / 10;
+        if (page * 10 < count) {
+          page = (count + 10) /10;
+        }
+      }
+      for (var i = 0; i <= page; i++) {
+        User.paginateUsers(i, 10,
+        function (error, users) {
+          if (error) {
+            console.log(error);
+          } else {
+            users.forEach(function(user) {
+              queue.addTokenRevokedJob(user);
+            })
+          }
+        })
+      }
+    }
+  })
+}

model/user.js

@@ -5,7 +5,8 @@ const userSchema = mongoose.Schema({
   token: String,
   email: String,
   name: String,
-  username: String
+  username: String,
+  expired: Boolean
 });
 
 const User = module.exports = mongoose.model('User', userSchema);
@@ -27,3 +28,36 @@ module.exports.getUserById = function(id, callback) {
 module.exports.getUserByUsername = function(username, callback) {
   User.findOne({username: username}, callback);
 };
+
+/**
+ * Count the number of repository
+ */
+
+module.exports.countUsers = function (callback) {
+  User.count({}, callback);
+};
+
+/**
+ * paginates repositories
+ * @param page: n'th page
+ * @param limit: limit for number of repository to return
+ */
+
+module.exports.paginateUsers = function (page, limit, callback) {
+  var skip = 0;
+  if (page > 1) {
+    skip = page * limit;
+  }
+  User.find({}).skip(skip).limit(limit).exec(callback);
+};
+
+/**
+ * Update the user by Github's Users id
+ * @param id: Github's user id
+ * @param update: user update
+ */
+module.exports.updateUserById = function(id, update, callback) {
+  User.update({id: id}, update, function(error, data) {
+    callback(error, data);
+  });
+};

package.json

@@ -19,6 +19,7 @@
     "moment": "^2.18.1",
     "mongoose": "^4.11.0",
     "morgan": "~1.8.1",
+    "node-cron": "^1.2.0",
     "nodemailer": "^4.0.1",
     "passport": "^0.3.2",
     "passport-github": "^1.1.0",

util/passport.js

@@ -26,8 +26,7 @@ module.exports = function (passport) {
         return done(error);
       }
       if (user) {
-        user.token = crypter.encrypt(accessToken);
-        user.save();
+
         return done(null, user);
       } else {
         let newUser = new User();
@@ -57,5 +56,4 @@ module.exports = function (passport) {
       cb(null, profile);
     }
   ));
-
 };