serverstub added

serverstub.js

+/**
+ * Serverstub.js
+ *
+ * Simple dummy server for TDDD97
+ *
+ * If you're a student, you shouldn't need to look through this file,
+ *  the description of how it works is in the lab instructions.
+ **/
+var serverstub = (function() {
+  'use strict';
+
+  var users;
+  var loggedInUsers;
+
+  var syncStorage = function(){
+	if (localStorage.getItem("users") === null) {
+	    users = {};
+	} else {
+	    users = JSON.parse(localStorage.getItem("users"));
+	}
+
+	if (localStorage.getItem("loggedinusers") === null) {
+	    loggedInUsers = {};
+	} else {
+	    loggedInUsers = JSON.parse(localStorage.getItem("loggedinusers"));
+      }
+
+  }
+  
+  var persistUsers = function(){
+    localStorage.setItem("users", JSON.stringify(users));
+  };
+  var persistLoggedInUsers = function(){
+    localStorage.setItem("loggedinusers", JSON.stringify(loggedInUsers));
+  };
+  var tokenToEmail = function(token){
+    return loggedInUsers[token];
+  };
+  var copyUser = function(user){
+    return JSON.parse(JSON.stringify(user));
+  };
+
+  var serverstub = {
+    signIn: function(email, password){
+      syncStorage();
+      if(users[email] != null && users[email].password == password){
+        var letters = "abcdefghiklmnopqrstuvwwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
+        var token = "";
+        for (var i = 0 ; i < 36 ; ++i) {
+          token += letters[Math.floor(Math.random() * letters.length)];
+        }
+        loggedInUsers[token] = email;
+        persistLoggedInUsers();
+        return {"success": true, "message": "Successfully signed in.", "data": token};
+      } else {
+        return {"success": false, "message": "Wrong username or password."};
+      }
+    },
+
+    postMessage: function(token, content, toEmail){
+      syncStorage();
+      var fromEmail = tokenToEmail(token);
+      if (fromEmail != null) {
+        if (toEmail == null) {
+          toEmail = fromEmail;
+        }
+        if(users[toEmail] != null){
+          var recipient = users[toEmail];
+          var message = {"writer": fromEmail, "content": content};
+          recipient.messages.unshift(message);
+          persistUsers();
+          return {"success": true, "message": "Message posted"};
+        } else {
+          return {"success": false, "message": "No such user."};
+        }
+      } else {
+        return {"success": false, "message": "You are not signed in."};
+      }
+    },
+
+    getUserDataByToken: function(token){
+      syncStorage();
+      var email = tokenToEmail(token);
+      return serverstub.getUserDataByEmail(token, email);
+    },
+
+    getUserDataByEmail: function(token, email){
+	syncStorage();
+      if (loggedInUsers[token] != null){
+        if (users[email] != null) {
+          var match = copyUser(users[email]);
+          delete match.messages;
+          delete match.password;
+          return {"success": true, "message": "User data retrieved.", "data": match};
+        } else {
+          return {"success": false, "message": "No such user."};
+        }
+      } else {
+        return {"success": false, "message": "You are not signed in."};
+      }
+    },
+
+    getUserMessagesByToken: function(token){
+      syncStorage();
+      var email = tokenToEmail(token);
+      return serverstub.getUserMessagesByEmail(token,email);
+    },
+
+    getUserMessagesByEmail: function(token, email){
+	syncStorage();
+      if (loggedInUsers[token] != null){
+        if (users[email] != null) {
+          var match = copyUser(users[email]).messages;
+          return {"success": true, "message": "User messages retrieved.", "data": match};
+        } else {
+          return {"success": false, "message": "No such user."};
+        }
+      } else {
+        return {"success": false, "message": "You are not signed in."};
+      }
+    },
+
+    signOut: function(token){
+      syncStorage();
+      if (loggedInUsers[token] != null){
+        delete loggedInUsers[token];
+        persistLoggedInUsers();
+        return {"success": true, "message": "Successfully signed out."};
+      } else {
+        return {"success": false, "message": "You are not signed in."};
+      }
+    },
+
+    signUp: function(inputObject){ // {email, password, firstname, familyname, gender, city, country}
+      syncStorage();
+      if (users[inputObject.email] === undefined){
+        if(
+          (typeof(inputObject.email) === 'string') &&
+          (typeof(inputObject.password) === 'string') &&
+          (typeof(inputObject.firstname) === 'string') &&
+          (typeof(inputObject.familyname) === 'string') &&
+          (typeof(inputObject.gender) === 'string') &&
+          (typeof(inputObject.city) === 'string') &&
+          (typeof(inputObject.country) === 'string')
+        ) {
+          var user = {
+            'email': inputObject.email,
+            'password': inputObject.password,
+            'firstname': inputObject.firstname,
+            'familyname': inputObject.familyname,
+            'gender': inputObject.gender,
+            'city': inputObject.city,
+            'country': inputObject.country,
+            'messages': []
+          };
+            users[inputObject.email] = user;
+            persistUsers();
+            return {"success": true, "message": "Successfully created a new user."};
+        } else {
+          return {"success": false, "message": "Form data missing or incorrect type."};
+        }
+
+      } else {
+        return {"success": false, "message": "User already exists."};
+      }
+    },
+
+    changePassword: function(token, oldPassword, newPassword){
+      syncStorage();
+      if (loggedInUsers[token] != null){
+        var email = tokenToEmail(token);
+        if (users[email].password == oldPassword){
+          users[email].password = newPassword;
+          persistUsers();
+          return {"success": true, "message": "Password changed."};
+        } else {
+          return {"success": false, "message": "Wrong password."};
+        }
+      } else {
+        return {"success": false, "message": "You are not logged in."};
+      }
+    }
+  };
+
+  return serverstub;
+})();