Implemented graphql in front and backend

- implementation of graphql api-point for bingo
- added player view
- added player view toggle button
-  added submit on enter
- improved mobile layout

graphql/bingo.graphql

@@ -1,22 +1,22 @@
 type BingoMutation {
 
     # creates a game of bingo and returns the game id
-    createGame(words: [String!]!, size: Int = 3): BingoGame
+    createGame(input: CreateGameInput!): BingoGame
 
     # submit a bingo to the active game session
-    submitBingo: Boolean
+    submitBingo: BingoGame
 
     # toggle a word (heared or not) on the sessions grid
-    toggleWord(word: String, base64Word: String): BingoGrid
+    toggleWord(input: WordInput!): BingoGrid
 
     # set the username of the current session
-    setUsername(username: String!): BingoUser
+    setUsername(input: UsernameInput): BingoUser
 }
 
 type BingoQuery {
 
     # Returns the currently active bingo game
-    gameInfo(id: ID): BingoGame
+    gameInfo(input: IdInput): BingoGame
 
     # If there is a bingo in the fields.
     checkBingo: Boolean
@@ -25,6 +25,36 @@ type BingoQuery {
     activeGrid: BingoGrid
 }
 
+input CreateGameInput {
+
+    # the words used to fill the bingo grid
+    words: [String!]!
+
+    # the size of the bingo grid
+    size: Int! = 3
+}
+
+input WordInput {
+
+    # the normal word string
+    word: String
+
+    # the base64-encoded word
+    base64Word: String
+}
+
+input UsernameInput {
+
+    # the username string
+    username: String!
+}
+
+input IdInput {
+
+    # the id
+    id: ID!
+}
+
 type BingoGame {
 
     # the id of the bingo game
@@ -37,7 +67,7 @@ type BingoGame {
     gridSize: Int
 
     # an array of players active in the bingo game
-    players(id: ID): [BingoUser]
+    players(input: IdInput): [BingoUser]
 
     # the player-ids that scored a bingo
     bingos: [String]!
@@ -78,5 +108,6 @@ type BingoField {
     # if the word was already heared
     submitted: Boolean!
 
+    # the base64 encoded word
     base64Word: String
 }

public/javascripts/bingo-web.js

@@ -1,92 +1,233 @@
+/**
+ * Returns the value of the url-param 'game'
+ * @returns {string}
+ */
+function getGameParam() {
+    return window.location.href.match(/\?game=(\w+)/)[1];
+}
+
+/**
+ * Toggles the visiblity of the player.container
+ */
+function togglePlayerContainer() {
+    let playerContainer = document.querySelector('#players-container');
+    if (playerContainer.getAttribute('class') === 'hidden')
+        playerContainer.setAttribute('class', '');
+    else
+        playerContainer.setAttribute('class', 'hidden');
+}
+
+/**
+ * Submits the bingo words to create a game
+ * @returns {Promise<void>}
+ */
 async function submitBingoWords() {
     let textContent = document.querySelector('#bingo-textarea').value;
     let words = textContent.replace(/[<>]/g, '').split('\n');
     let size = document.querySelector('#bingo-grid-size').value;
-    let dimY = document.querySelector('#bingo-grid-y').value;
-    let response = await postLocData({
-        bingoWords: words,
-        size: size
-    });
 
-    let data = JSON.parse(response.data);
-    let gameid = data.id;
-    insertParam('game', gameid);
+    let response = await postGraphqlQuery(`
+    mutation($words:[String!]!, $size:Int!) {
+      bingo {
+        createGame(input: {
+          words: $words,
+          size: $size
+        }) {
+          id
+        }
+      }
+    }`, {
+        words: words,
+        size: Number(size)
+    }, `/graphql?game=${getGameParam()}`);
+    if (response.status === 200) {
+        let gameid = response.data.bingo.createGame.id;
+        insertParam('game', gameid);
+    } else {
+        console.error(response)
+    }
 }
 
+/**
+ * Submits the value of the username-input to set the username.
+ * @returns {Promise<void>}
+ */
 async function submitUsername() {
     let unameInput = document.querySelector('#username-input');
     let username = unameInput.value;
-    let response = await postLocData({
+    let response = await postGraphqlQuery(`
+    mutation($username:String!) {
+      bingo {
+        setUsername(input: {username: $username}) {
+          id
+          username
+        }
+      }
+    }`, {
         username: username
-    });
-    unameInput.value = '';
-    unameInput.placeholder = username;
-    document.querySelector('#username-form').remove();
-    document.querySelector('.greyover').remove();
-
-    console.log(response);
+    },`/graphql?game=${getGameParam()}`);
+    if (response.status === 200) {
+        unameInput.value = '';
+        unameInput.placeholder = response.data.username;
+        document.querySelector('#username-form').remove();
+        document.querySelector('.greyover').remove();
+    } else {
+        console.error(response);
+    }
 }
 
+/**
+ * toggles a word (toggle occures on response)
+ * @param word {String} - the base64 encoded bingo word
+ * @returns {Promise<void>}
+ */
 async function submitWord(word) {
-    let response = await postLocData({
-        bingoWord: word
-    });
-    console.log(response);
+    let response = await postGraphqlQuery(`
+    mutation($word:String!) {
+      bingo {
+        toggleWord(input: {base64Word: $word}) {
+          bingo
+          fieldGrid {
+            submitted
+            base64Word
+          }
+        }
+      }
+    }`, {
+        word: word
+    },`/graphql?game=${getGameParam()}`);
 
-    let data = JSON.parse(response.data);
-    for (let row of data.fieldGrid) {
-        for (let field of row) {
-            document.querySelectorAll(`.bingo-word-panel[b-word="${field.base64Word}"]`).forEach(x => {
-                x.setAttribute('b-sub', field.submitted);
-            });
+    if (response.status === 200 && response.data.bingo.toggleWord) {
+        let fieldGrid = response.data.bingo.toggleWord.fieldGrid;
+        for (let row of fieldGrid) {
+            for (let field of row) {
+                document.querySelectorAll(`.bingo-word-panel[b-word="${field.base64Word}"]`).forEach(x => {
+                    x.setAttribute('b-sub', field.submitted);
+                });
+            }
+        }
+        if (response.data.bingo.toggleWord.bingo) {
+            document.querySelector('#bingo-button').setAttribute('class', '');
+        } else {
+            document.querySelector('#bingo-button').setAttribute('class', 'hidden');
         }
-    }
-    if (data.bingo) {
-        document.querySelector('#bingo-button').setAttribute('class', '');
     } else {
-        document.querySelector('#bingo-button').setAttribute('class', 'hidden');
+        console.error(response);
     }
 }
 
+/**
+ * Submits a bingo (Bingo button is pressed).
+ * The game is won if the backend validated it.
+ * @returns {Promise<void>}
+ */
 async function submitBingo() {
-    let response = await postLocData({
-        bingo: true
-    });
-    let data = JSON.parse(response.data);
-    if (data.bingos.length > 0) {
-        displayWinner(data.users[data.bingos[0]].username);
-        clearInterval(refrInterval)
+    let response = await postGraphqlQuery(`
+    mutation {
+      bingo {
+        submitBingo {
+          id
+          bingos
+          players {
+            id
+            username
+          }
+        }
+      }
+    }`,null,`/graphql?game=${getGameParam()}`);
+    if (response.status === 200 && response.data.bingo.submitBingo) {
+        let bingoSession = response.data.bingo.submitBingo;
+        if (bingoSession.bingos.length > 0) {
+            displayWinner(bingoSession.players.find(x => x.id === bingoSession.bingos[0]).username);
+            clearInterval(refrInterval)
+        }
+    } else {
+        console.error(response);
     }
-    console.log(response);
 }
 
+/**
+ * Refreshes the information (by requesting information about the current game).
+ * Is used to see if one player has scored a bingo and which players are in the game.
+ * @returns {Promise<void>}
+ */
 async function refresh() {
-    let response = await postLocData({});
-    if (response.status === 400)
-        clearInterval(refrInterval);
-    let data = JSON.parse(response.data);
-    if (data.bingos.length > 0) {
-        displayWinner(data.users[data.bingos[0]].username);
-        clearInterval(refrInterval)
+    let response = await postGraphqlQuery(`
+    query {
+      bingo {
+        gameInfo {
+          id
+          bingos
+          players {
+            username
+            id
+          }
+        }
+      }
+    }`, null, `/graphql?game=${getGameParam()}`);
+    if (response.status === 200 && response.data.bingo.gameInfo) {
+        let bingoSession = response.data.bingo.gameInfo;
+
+        if (bingoSession.bingos.length > 0) {
+            displayWinner(bingoSession.players.find(x => x.id === bingoSession.bingos[0]).username);
+            clearInterval(refrInterval)
+        } else {
+            for (let player of bingoSession.players) {
+                let foundPlayerDiv = document.querySelector(`.player-container[b-pid='${player.id}'`);
+                if (!foundPlayerDiv) {
+                    let playerDiv = document.createElement('div');
+                    playerDiv.setAttribute('class', 'player-container');
+                    playerDiv.setAttribute('b-pid', player.id);
+                    playerDiv.innerHTML = `<span class="player-name-span">${player.username}</span>`;
+                    document.querySelector('#players-container').appendChild(playerDiv);
+                } else {
+                    let playerNameSpan = foundPlayerDiv.querySelector('.player-name-span');
+                    if (playerNameSpan.innerText !== player.username) {
+                        playerNameSpan.innerText = player.username;
+                    }
+                }
+            }
+        }
+    } else  {
+        if (response.status === 400)
+            clearInterval(refrInterval);
+        console.error(response);
     }
-    console.log(response);
 }
 
+/**
+ * Displays the winner of the game in a popup.
+ * @param name {String} - the name of the winner
+ */
 function displayWinner(name) {
     let winnerDiv = document.createElement('div');
     let greyoverDiv = document.createElement('div');
     let winnerSpan = document.createElement('span');
     winnerDiv.setAttribute('class', 'popup');
+    winnerDiv.setAttribute('style', 'cursor: pointer');
     greyoverDiv.setAttribute('class', 'greyover');
     winnerSpan.innerText = `${name} has won!`;
     winnerDiv.appendChild(winnerSpan);
+    winnerDiv.onclick = () => {
+        window.location.reload();
+    };
     document.body.append(greyoverDiv);
     document.body.appendChild(winnerDiv);
 }
 
+/**
+ * Executes the provided function if the key-event is an ENTER-key
+ * @param event {Event} - the generated key event
+ * @param func {function} - the function to execute on enter
+ */
+function submitOnEnter(event, func) {
+    if (event.which === 13)
+        func();
+}
+
 window.onload = () => {
     if (window && !document.querySelector('#bingoform')) {
-        refrInterval = setInterval(refresh, 1000);
+        refrInterval = setInterval(refresh, 1000);      // global variable to clear
     }
     let gridSizeElem = document.querySelector('#bingo-grid-size');
     document.querySelector('#bingo-grid-y').innerText = gridSizeElem.value;

public/javascripts/common.js

@@ -1,4 +1,4 @@
-function postLocData(postBody) {
+function postData(url, postBody) {
     let request = new XMLHttpRequest();
     return new Promise((res, rej) => {
 
@@ -13,12 +13,39 @@ function postLocData(postBody) {
             rej(request.error);
         };
 
-        request.open('POST', '#', true);
+        request.open('POST', url, true);
         request.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
         request.send(JSON.stringify(postBody));
     });
 }
 
+async function postLocData(postBody) {
+    return await postData('#', postBody);
+}
+
+async function postGraphqlQuery(query, variables, url) {
+    let body = {
+        query: query,
+        variables: variables
+    };
+    let response = await postData(url || '/graphql', body);
+    let resData = JSON.parse(response.data);
+
+    if (response.status === 200) {
+        return {
+            status: response.status,
+            data: resData.data,
+        };
+    } else {
+        return {
+            status: response.status,
+            data: resData.data,
+            errors: resData.errors,
+            requestBody: body
+        };
+    }
+}
+
 function insertParam(key, value) {
     key = encodeURI(key);
     value = encodeURI(value);

public/stylesheets/sass/bingo/style.sass

@@ -18,6 +18,14 @@ textarea
   #words-container
     width: 100%
     height: 80%
+  #content-container #row-1 #players-container div
+    display: none
+    padding: 0
+  #username-form
+    width: calc(100% - 2rem) !important
+    left: 0 !important
+  #hide-player-container-button
+    display: none
 
 @media(min-device-width: 641px)
   textarea
@@ -25,7 +33,7 @@ textarea
     width: 50%
   #words-container
     width: 100%
-    height: 88%
+    height: 100%
 
 .number-input
   width: 4rem
@@ -96,14 +104,36 @@ textarea
 
   button
     cursor: pointer
+    width: 100%
+    margin: 1rem auto
 
   input[type='text']
     cursor: text
+    width: 100%
 
 #username-form *
   display: inline-block
   vertical-align: middle
 
+#content-container
+  display: table
+  height: 100%
+  width: 100%
+
+  #row-1
+    display: table-row
+    height: 85%
+
+    #players-container
+      display: table-cell
+      padding: 0.5rem
+      transition-duration: 1s
+
+      .player-container
+        @include default-element
+        padding: 0.5rem
+        max-width: 14rem
+
 .popup
   @include default-element
   height: 5%

public/stylesheets/sass/classes.sass

@@ -2,7 +2,7 @@
   display: table-row
 
 .hidden
-  display: None
+  display: None !important
 
 .popup
   height: 60%

routes/bingo.js

@@ -37,8 +37,9 @@ class BingoSession {
      * @returns {any[]|*}
      */
     players(args) {
-        if (args.id)
-            return [this.users[args.id]];
+        let input = args? args.input : null;
+        if (input && input.id)
+            return [this.users[input.id]];
         else
             return Object.values(this.users);
     }
@@ -224,7 +225,7 @@ router.use((req, res, next) => {
 router.get('/', (req, res) => {
     let bingoUser = req.session.bingoUser;
     if (req.query.game) {
-        let gameId = req.query.game;
+        let gameId = req.query.game || bingoUser.game;
 
         if (bingoSessions[gameId] && !bingoSessions[gameId].finished) {
             bingoUser.game = gameId;
@@ -234,7 +235,11 @@ router.get('/', (req, res) => {
             if (!bingoUser.grids[gameId]) {
                 bingoUser.grids[gameId] = generateWordGrid([bingoSession.gridSize, bingoSession.gridSize], bingoSession.words);
             }
-            res.render('bingo/bingo-game', {grid: bingoUser.grids[gameId].fieldGrid, username: bingoUser.username});
+            res.render('bingo/bingo-game', {
+                grid: bingoUser.grids[gameId].fieldGrid,
+                username: bingoUser.username,
+                players: bingoSession.players()
+            });
         } else {
             res.render('bingo/bingo-submit');
         }
@@ -243,81 +248,28 @@ router.get('/', (req, res) => {
     }
 });
 
-router.post('/', (req, res) => {
-    let data = req.body;
-    let gameId = req.query.game;
-    let bingoUser = req.session.bingoUser;
-    let bingoSession = bingoSessions[gameId];
-
-    if (data.bingoWords) {
-        let words = data.bingoWords;
-        let size = data.size;
-        let game = new BingoSession(words, size);
-
-        bingoSessions[game.id] = game;
-
-        setTimeout(() => { // delete the game after one day
-            delete bingoSessions[game.id];
-        }, 86400000);
-
-        res.send(game);
-    } else if (data.username) {
-        bingoUser.username = data.username;
-        bingoSessions[gameId].addUser(bingoUser);
-
-        res.send(bingoUser);
-    } else if (data.game) {
-        res.send(bingoSessions[data.game]);
-    } else if (data.bingoWord) {
-        console.log(typeof bingoUser.grids[gameId]);
-        if (bingoUser.grids[gameId])
-            toggleHeared(data.bingoWord, bingoUser.grids[gameId]);
-        res.send(bingoUser.grids[gameId]);
-    } else if (data.bingo) {
-        if (checkBingo(bingoUser.grids[gameId])) {
-            if (!bingoSession.bingos.includes(bingoUser.id))
-                bingoSession.bingos.push(bingoUser.id);
-            bingoSession.finished = true;
-            setTimeout(() => { // delete the finished game after five minutes
-                delete bingoSessions[gameId];
-            }, 360000);
-            res.send(bingoSession);
-        } else {
-            res.status(400);
-            res.send({'error': "this is not a bingo!"})
-        }
-    } else if (bingoSession) {
-        res.send(bingoSession);
-    } else {
-        res.status(400);
-        res.send({
-            error: 'invalid request data'
-        })
-    }
-});
-
 router.graphqlResolver = (req) => {
     let bingoUser = req.session.bingoUser || new BingoUser();
     let gameId = req.query.game || bingoUser.game || null;
     let bingoSession = bingoSessions[gameId];
     return {
         // queries
-        gameInfo: (args) => {
-            if (args.id)
-                return bingoSessions[args.id];
+        gameInfo: ({input}) => {
+            if (input && input.id)
+                return bingoSessions[input.id];
             else
                 return bingoSession;
         },
-        checkBingo: (args) => {
+        checkBingo: () => {
             return checkBingo(bingoUser.grids[gameId])
         },
-        activeGrid: (args) => {
+        activeGrid: () => {
             return bingoUser.grids[gameId];
         },
         // mutation
-        createGame: (args) => {
-            let words = args.words;
-            let size = args.size;
+        createGame: ({input}) => {
+            let words = input.words;
+            let size = input.size;
             let game = new BingoSession(words, size);
 
             bingoSessions[game.id] = game;
@@ -328,31 +280,33 @@ router.graphqlResolver = (req) => {
 
             return game;
         },
-        submitBingo: (args) => {
+        submitBingo: () => {
             if (checkBingo(bingoUser.grids[gameId])) {
                 if (!bingoSession.bingos.includes(bingoUser.id))
                     bingoSession.bingos.push(bingoUser.id);
                 bingoSession.finished = true;
                 setTimeout(() => { // delete the finished game after five minutes
                     delete bingoSessions[gameId];
-                }, 360000);
-                return true;
+                }, 300000);
+                return bingoSession;
             } else {
-                return false;
+                return bingoSession;
             }
         },
-        toggleWord: (args) => {
-            if (args.word || args.base64Word) {
-                args.base64Word = args.base64Word || Buffer.from(args.word).toString('base-64');
+        toggleWord: ({input}) => {
+            if (input.word || input.base64Word) {
+                input.base64Word = input.base64Word || Buffer.from(input.word).toString('base-64');
                 if (bingoUser.grids[gameId])
-                    toggleHeared(args.base64Word, bingoUser.grids[gameId]);
+                    toggleHeared(input.base64Word, bingoUser.grids[gameId]);
                 return bingoUser.grids[gameId];
             }
         },
-        setUsername: (args) => {
-            if (args.username) {
-                bingoUser.username = args.username;
-                bingoSession.addUser(bingoUser);
+        setUsername: ({input}) => {
+            if (input.username) {
+                bingoUser.username = input.username;
+
+                if (bingoSession)
+                    bingoSession.addUser(bingoUser);
 
                 return bingoUser;
             }

views/bingo/bingo-game.pug

@@ -3,13 +3,21 @@ include bingo-layout
 block content
     if username === 'anonymous'
         div(class='greyover')
-        div(id='username-form')
+        div(id='username-form', onkeypress='submitOnEnter(event, submitUsername)')
             input(type='text', id='username-input', placeholder=username)
             button(onclick='submitUsername()') Set Username
-    div(id='words-container')
-        each val in grid
-            div(class='bingo-word-row')
-                each field in val
-                    div(class='bingo-word-panel', onclick=`submitWord('${field.base64Word}')`, b-word=field.base64Word, b-sub='false')
-                        span= field.word
-    button(id='bingo-button' onclick='submitBingo()', class='hidden') Bingo!
+    div(id='content-container')
+        button(id='hide-player-container-button', onclick='togglePlayerContainer()') Toggle Player View
+        div(id='row-1')
+            div(id='players-container')
+                each player in players
+                    div(class='player-container', b-pid=`${player.id}`)
+                        span(class='player-name-span')= player.username
+            div(id='words-container')
+                each val in grid
+                    div(class='bingo-word-row')
+                        each field in val
+                            div(class='bingo-word-panel', onclick=`submitWord('${field.base64Word}')`, b-word=field.base64Word, b-sub=`${field.submitted}`)
+                                span= field.word
+        div(id='button-container')
+            button(id='bingo-button' onclick='submitBingo()', class='hidden') Bingo!

views/bingo/bingo-submit.pug

@@ -4,7 +4,7 @@ block content
     div(id='bingoform')
         div(id='bingoheader')
             div
-                input(type='number', id='bingo-grid-size', class='number-input', value=3, min=1, max=8)
+                input(type='number', id='bingo-grid-size', class='number-input', value=3, min=1, max=8, onkeypress='submitOnEnter(event, submitBingoWords)')
                 span x
                 span(id='bingo-grid-y', class='number-input') 3
             div(class='stretchDiv')