Meteor.js - Multiplayer Meteor Login Logic. @aaronthorp

README.md

Meteor.js - Multiplayer Game Logic

Code implementation for simple multiplayer on login. Requrires accounts-entry or similar login forms and profile-online

client.js

if (Meteor.isClient) {
  
  Deps.autorun(function() {
    Subs_Games = Meteor.subscribe("myGames", Meteor.userId());
  });
 
  Template.home.game = function() {
    return GameCollection.findOne({current: true});
  };
  
  Template.home.events({
    "click #newGame": function() {
      Meteor.call('newGame');
    },
    "click #finishGame": function() {
      var game = GameCollection.findOne({current: true});
      Meteor.call('finishGame', game._id);
    }
  });
  
}

common.js

GameCollection = new Meteor.Collection("games");

home.html

<template name="home">
  <p>Welcome to my new meteor multiplayer app</p>
  
  <p><strong> Current Game Status: </strong>
  {{#if game.active}}
    Game is in play! <a href="#" id="finishGame">Finish the Game</a>.
  {{else}}
    {{#if game.finished}}
      Game Completed or other player left. <a href="#" id="newGame">Start a New Game</a>.
    {{else}}
      Waiting for new player to login...or <a href="#" id="newGame">Find a New Game</a> by an online user.
    {{/if}}
  {{/if}}
  </p>
  
  <p><strong> Current Game ID: </strong>{{game._id}}</p>
  <p><strong> Current Game Player Count: </strong>{{game.players.length}}</p>
 
  <p><strong> Current Game Active: </strong>{{game.active}}</p>
  
  <p><a href="{{pathFor 'entrySignOut'}}">Logout</a></p>
</template>

server.js

if (Meteor.isServer) {
  
  Meteor.methods({
    newGame: function() {
      allocateGame(this.userId);
    },
    finishGame: function(_id) {
      GameCollection.update({_id: _id}, {$set: {active: false, finished: true}});
    }
  })
  
  Meteor._onLogin  = function (userId) { 
    allocateGame(userId);
    console.log(userId + "just logged in.") 
  }
  
  Meteor._onLogout = function (userId) { 
    leaveGames(userId);
    console.log(userId + "just logged out.") 
  }
  
  allocateGame = function(userId) {
    var gameWaiting = GameCollection.findOne({players: {$size: 1}});
    
    if (!gameWaiting) {
      console.log("creating a new game, none available");
      GameCollection.update({players: userId}, {$set: {current: false}}, {multi: true});
      GameCollection.insert({players: [userId], active: false, finished: false, current: true});
    } else {
      if (_.contains(gameWaiting.players, userId)) {
        console.log("Cannot play with yourself. But you can stay waiting in the game.")
      } else {
        console.log("connecting with an existing waiting player");
        GameCollection.update({_id: gameWaiting._id}, {$set: {active: true}, $push: {players: userId}});
    }
  };
  
  leaveGames = function(userId) {
    console.log("leaving all unfinished games");
    
    GameCollection.remove({$and: [{players: userId, players: {$size: 1}}]});
    
    var games = GameCollection.find({$and: [{players: userId, active: true}]});
  
    games.forEach(function(game) {
      GameCollection.update({_id: game._id}, {$set: {active: false, finished: true}});          
    })
  };
  
  Meteor.publish('myGames', function() {
   
    if (!this.userId) {
        console.log('MyGames Un-Publish');
        //return [];
        this.ready();
    } else {
      console.log('MyGames Publish: U-'+this.userId);
      return GameCollection.find({players: this.userId});
    }
  
  });
  
}

tmp-allocateGame.js

allocateGame = function(userId) {
  var gameWaiting = GameCollection.findOne({players: {$size: 1}});
  
  if (!gameWaiting) {
    console.log("creating a new game, none available");
    GameCollection.update({players: userId}, {$set: {current: false}}, {multi: true});
    GameCollection.insert({players: [userId], active: false, finished: false, current: true});
  } else {
    if (_.contains(gameWaiting.players, userId)) {
      console.log("Cannot play with yourself. But you can stay waiting in the game.")
    } else {
      console.log("connecting with an existing waiting player");
      GameCollection.update({_id: gameWaiting._id}, {$set: {active: true}, $push: {players: userId}});
  }
};

tmp-leaveGame.js

leaveGames = function(userId) {
  console.log("leaving all unfinished games");
  
  GameCollection.remove({$and: [{players: userId, players: {$size: 1}}]});
  
  var games = GameCollection.find({$and: [{players: userId, active: true}]});

  games.forEach(function(game) {
    GameCollection.update({_id: game._id}, {$set: {active: false, finished: true}});          
  })
};

tmp-publish.js

Meteor.publish('myGames', function() {
 
  if (!this.userId) {
      console.log('MyGames Un-Publish');
      //return [];
      this.ready();
  } else {
    console.log('MyGames Publish: U-'+this.userId);
    return GameCollection.find({players: this.userId});
  }

});