solution

.gitignore

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+node_modules/
+.env

README.md

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 # assignment_thoreddit
-A social news web application for Viking thunder Gods
+
+A social news web application for Viking thunder Gods Hai Dave

app.js

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+var express = require("express");
+var path = require("path");
+var favicon = require("serve-favicon");
+var logger = require("morgan");
+var cookieParser = require("cookie-parser");
+var bodyParser = require("body-parser");
+
+var index = require("./routes/index");
+var users = require("./routes/users");
+
+var app = express();
+
+// view engine setup
+app.set("views", path.join(__dirname, "views"));
+app.set("view engine", "hbs");
+
+//connecting mongodb database to all the routes
+var mongoose = require("mongoose");
+app.use((req, res, next) => {
+  if (mongoose.connection.readyState) {
+    next();
+  } else {
+    require("./mongo")().then(() => next());
+  }
+});
+
+// uncomment after placing your favicon in /public
+//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
+app.use(logger("dev"));
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({extended: false}));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, "public")));
+
+app.use("/", index);
+app.use("/users", users);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  var err = new Error("Not Found");
+  err.status = 404;
+  next(err);
+});
+
+// error handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get("env") === "development" ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.render("error");
+});
+
+module.exports = app;

bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('assignment-thoreddit:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

config/mongo.json

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+{
+  "development": {
+    "database": "thoreddit_development",
+    "host": "localhost"
+  },
+  "test": {
+    "database": "thoreddit_test",
+    "host": "localhost"
+  },
+  "production": {
+    "use_env_variable": "MONGODB_URI"
+  }
+}

models/commentable.js

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+var mongoose = require("mongoose");
+var Schema = mongoose.Schema;
+
+var CommentableSchema = new Schema(
+  {
+    title: String,
+    text: String,
+    score: Number,
+    parentId: Number,
+    user: {
+      type: Schema.Types.ObjectId,
+      ref: "User"
+    }
+  },
+
+  {
+    timestamps: true
+  }
+);
+
+let Commentable = mongoose.model("Commentable", CommentableSchema);
+
+module.exports = Commentable;

models/index.js

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+var mongoose = require("mongoose");
+var bluebird = require("bluebird");
+
+// Set bluebird as the promise
+// library for mongoose
+mongoose.Promise = bluebird;
+
+var models = {};
+
+// Load models and attach to models here
+models.User = require("./user");
+models.Commentable = require("./commentable");
+
+//... more models
+
+module.exports = models;

models/user.js

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+// Require mongoose and get
+// the Schema constructor
+var mongoose = require("mongoose");
+var Schema = mongoose.Schema;
+
+// Create a new schema for
+// the user model
+var UserSchema = new Schema(
+  {
+    fname: String,
+    lname: String,
+    username: String,
+    email: String
+  },
+  {
+    timestamps: true
+  }
+);
+
+// Create the model with a defined schema
+var User = mongoose.model("User", UserSchema);
+
+module.exports = User;

mongo.js

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+var mongoose = require("mongoose");
+var env = process.env.NODE_ENV || "development";
+var config = require("./config/mongo")[env];
+
+module.exports = () => {
+  var envUrl = process.env[config.use_env_variable];
+  var localUrl = `mongodb://${config.host}/${config.database}`;
+  var mongoUrl = envUrl ? envUrl : localUrl;
+  return mongoose.connect(mongoUrl);
+};