database/migrations/structure/20210510_2000_challenge.sql

@@ -0,0 +1,54 @@
+CREATE TABLE `challenges` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `token` int(10) unsigned NOT NULL,
+  `time_limit` int(10) unsigned,
+  `time_limit_type` enum('game', 'round') NOT NULL DEFAULT 'game',
+  `no_move` tinyint(1) NOT NULL DEFAULT 0,
+  `no_pan` tinyint(1) NOT NULL DEFAULT 0,
+  `no_zoom` tinyint(1) NOT NULL DEFAULT 0,
+  `created` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  PRIMARY KEY (`id`)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;
+
+CREATE TABLE `user_in_challenge` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `user_id` int(10) unsigned NOT NULL,
+  `challenge_id` int(10) unsigned NOT NULL,
+  `current_round` smallint(5) signed NOT NULL DEFAULT 0,
+  `time_left` int(10) unsigned,
+  `is_owner` tinyint(1) NOT NULL DEFAULT 0,
+  PRIMARY KEY (`id`),
+  KEY `user_id` (`user_id`),
+  KEY `challenge_id` (`challenge_id`),
+  CONSTRAINT `user_in_challenge_user_id` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`),
+  CONSTRAINT `user_in_challenge_challenge_id` FOREIGN KEY (`challenge_id`) REFERENCES `challenges` (`id`)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;
+
+CREATE TABLE `place_in_challenge` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `place_id` int(10) unsigned NOT NULL,
+  `challenge_id` int(10) unsigned NOT NULL,
+  `round` smallint(5) unsigned NOT NULL,
+  PRIMARY KEY (`id`),
+  KEY `place_id` (`place_id`),
+  KEY `challenge_id` (`challenge_id`),
+  CONSTRAINT `place_in_challenge_place_id` FOREIGN KEY (`place_id`) REFERENCES `places` (`id`),
+  CONSTRAINT `place_in_challenge_challenge_id` FOREIGN KEY (`challenge_id`) REFERENCES `challenges` (`id`),
+  CONSTRAINT `unique_order_in_challenge` UNIQUE (`round`, `challenge_id`)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;
+
+CREATE TABLE `guesses` (
+  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `user_id` int(10) unsigned NOT NULL,
+  `place_in_challenge_id` int(10) unsigned NOT NULL,
+  `lat` decimal(8,6) NOT NULL,
+  `lng` decimal(9,6) NOT NULL,
+  `score` int(10) NOT NULL,
+  `distance` int(10) NOT NULL,
+  `time_spent` int(10),
+  PRIMARY KEY (`id`),
+  KEY `user_id` (`user_id`),
+  KEY `place_in_challenge_id` (`place_in_challenge_id`),
+  CONSTRAINT `guesses_user_id` FOREIGN KEY (`user_id`) REFERENCES `users` (`id`),
+  CONSTRAINT `guesses_place_in_challenge_id` FOREIGN KEY (`place_in_challenge_id`) REFERENCES `place_in_challenge` (`id`)
+) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4;

public/static/css/game.css

@@ -15,6 +15,17 @@
     right: 0;
     background-color: #000000;
     opacity: 0.5;
+    z-index: 4;
+}
+
+#panningBlockerCover {
+    display: none;
+    position: absolute;
+    top: 0;
+    left: 0;
+    bottom: 0;
+    right: 0;
+    opacity: 0;
     z-index: 3;
 }
 
@@ -22,7 +33,7 @@
     position: absolute;
     bottom: 30px;
     right: 20px;
-    z-index: 2;
+    z-index: 3;
 }
 
 #guess.result {
@@ -153,6 +164,47 @@
     z-index: 2;
 }
 
+#goToStart {
+    display: none;
+}
+
+#highscoresTable {
+    margin: 1em;
+    border-collapse: collapse;
+    width: 90%;
+}
+
+#highscoresTable td, #highscoresTable th {
+    border: 1px solid #ddd;
+    padding: 8px;
+}
+
+#highscoresTable tr:nth-child(even) {
+    background-color: #f2f2f2;
+}
+
+#highscoresTable tr:hover {
+    background-color: #ddd;
+}
+
+#highscoresTable th {
+    padding-top: 12px;
+    padding-bottom: 12px;
+    text-align: left;
+    background-color: #e8a349;
+    color: white;
+}
+
+#highscoresTable tr.ownPlayer {
+    font-weight: 500;
+}
+
+@media screen and (max-width: 899px) {
+    .hideOnNarrowScreen {
+        display: none;
+    }
+}
+
 @media screen and (max-width: 599px) {
     #mapName {
         display: none;

public/static/css/mapguesser.css

@@ -31,11 +31,11 @@ main {
     color: #ffffff;
 }
 
-p, h1, h2, input, textarea, select, button, a {
+p, h1, h2, h3, input, textarea, select, button, a, table, label {
     font-family: 'Roboto', sans-serif;
 }
 
-h1, h2 {
+h1, h2, h3 {
     font-weight: 500;
 }
 
@@ -55,7 +55,11 @@ h2, header.small h1 {
     font-size: 24px;
 }
 
-p, h2 {
+h3 {
+    font-size: 18px;
+}
+
+p, h2, h3 {
     line-height: 150%;
 }
 

public/static/css/maps.css

@@ -75,6 +75,21 @@ div.mapItem>div.buttonContainer {
     grid-auto-flow: column;
 }
 
+#restrictions input {
+    height: auto;
+    margin: 0.5em;
+}
+
+#restrictions input[type=range] {
+    height: 1.5em;
+    margin-left: 2em;
+    width: 70%;
+}
+
+#timeLimitType {
+    margin-left: 2em;
+}
+
 @media screen and (min-width: 1504px) {
     #mapContainer {
         grid-template-columns: auto auto auto auto;

public/static/js/game.js

@@ -1,10 +1,13 @@
 'use strict';
 
+const GameType = Object.freeze({ 'SINGLE': 0, 'MULTI': 1, 'CHALLENGE': 2 });
+
 (function () {
     var Game = {
         NUMBER_OF_ROUNDS: 5,
         MAX_SCORE: 1000,
 
+        type: GameType.SINGLE,
         mapBounds: null,
         multi: { token: null, owner: false },
         rounds: [],
@@ -16,6 +19,8 @@
         guessMarker: null,
         adaptGuess: false,
         googleLink: null,
+        history: [],
+        restrictions: null,
 
         readyToContinue: true,
         timeoutEnd: null,
@@ -211,6 +216,19 @@
             }
         },
 
+        getGameIdentifier: function () {
+            switch (Game.type) {
+                case GameType.SINGLE:
+                    return '/game/' + mapId;
+                case GameType.MULTI:
+                    return '/multiGame/' + roomId;
+                case GameType.CHALLENGE:
+                    return '/challenge/' + challengeToken;
+                default:
+                    return '/game/' + mapId;
+            }
+        },
+
         prepare: function () {
             var data = new FormData();
             var userNames;
@@ -226,7 +244,7 @@
             }
 
             document.getElementById('loading').style.visibility = 'visible';
-            var url = roomId ? '/multiGame/' + roomId + '/prepare.json' : '/game/' + mapId + '/prepare.json';
+            var url = Game.getGameIdentifier() + '/prepare.json';
             MapGuesser.httpRequest('POST', url, function () {
                 document.getElementById('loading').style.visibility = 'hidden';
 
@@ -269,7 +287,7 @@
             }
 
             document.getElementById('loading').style.visibility = 'visible';
-            MapGuesser.httpRequest('POST', '/game/' + mapId + '/initialData.json', function () {
+            MapGuesser.httpRequest('POST', Game.getGameIdentifier() + '/initialData.json', function () {
                 document.getElementById('loading').style.visibility = 'hidden';
                 document.getElementById('panoCover').style.visibility = 'hidden';
 
@@ -278,24 +296,199 @@
                     return;
                 }
 
+                Game.loadHistory(this.response);
+
+                Game.restrictions = this.response.restrictions;
+                Game.displayRestrictions();
+
+                if (this.response.finished) {
+
+                    Game.transitToResultMap();
+                    Game.showSummary();
+
+                } else {
+
                     Game.panoId = this.response.place.panoId;
                     Game.pov = this.response.place.pov;
 
-                for (var i = 0; i < this.response.history.length; ++i) {
-                    var round = this.response.history[i];
-                    Game.rounds.push({ position: round.position, guessPosition: round.result.guessPosition, realMarker: null, guessMarkers: [] });
-                    Game.addPositionToResultMap(true);
-                    Game.addGuessPositionToResultMap(round.result.guessPosition, null, true);
-                    Game.scoreSum += round.result.score;
+                    Game.startNewRound();
                 }
 
                 document.getElementById('currentRound').innerHTML = String(Game.rounds.length) + '/' + String(Game.NUMBER_OF_ROUNDS);
                 document.getElementById('currentScoreSum').innerHTML = String(Game.scoreSum) + '/' + String(Game.rounds.length * Game.MAX_SCORE);
-
-                Game.startNewRound();
             });
         },
 
+        enableRestrictions: function () {
+            if (!Game.restrictions) {
+                return;
+            }
+
+            Game.panorama.setOptions({
+                clickToGo: !Game.restrictions.noMove,
+                linksControl: !(Game.restrictions.noMove || Game.restrictions.noPan),
+                scrollwheel: !Game.restrictions.noZoom
+            });
+
+            if (Game.restrictions.noPan) {
+                document.getElementById('panningBlockerCover').style.display = 'block';
+            }
+
+            if (Game.restrictions.timeLimit) {
+                Game.startCountdown(Game.restrictions.timeLimit, function () {
+                    Game.guess();
+                });
+            }
+
+        },
+
+        displayRestrictions: function () {
+            if (!Game.restrictions) {
+                return;
+            }
+
+            var restrictionsForDisplay = [];
+            if (Game.restrictions.timeLimit) {
+                restrictionsForDisplay.push('time limit per ' + Game.restrictions.timeLimitType);
+            }
+            if (Game.restrictions.noPan) {
+                restrictionsForDisplay.push('no camera change');
+            }
+            else {
+                if (Game.restrictions.noMove) {
+                    restrictionsForDisplay.push('no move');
+                }
+                if (Game.restrictions.noZoom) {
+                    restrictionsForDisplay.push('no zoom');
+                }
+            }
+
+            if (restrictionsForDisplay.length == 0) {
+                return;
+            }
+
+            // create restrictions span for header
+            var restrictions = document.createElement('span');
+            restrictions.setAttribute('id', 'restrictions');
+            restrictions.setAttribute('class', 'hideOnNarrowScreen');
+            var restrictionsTitle = document.createElement('span');
+            restrictionsTitle.setAttribute('class', 'bold');
+            restrictionsTitle.innerText = 'Restrictions: ';
+            var restrictionsList = document.createElement('span');
+            restrictionsList.innerText = restrictionsForDisplay.join(', ');
+            restrictions.appendChild(restrictionsTitle);
+            restrictions.appendChild(restrictionsList);
+
+            var roundContainer = document.getElementById('roundContainer');
+            var header = roundContainer.parentNode;
+            header.insertBefore(restrictions, roundContainer);
+        },
+
+        disableRestrictions: function () {
+
+            Game.panorama.setOptions({
+                clickToGo: true,
+                linksControl: true,
+                scrollwheel: true
+            });
+
+            document.getElementById('panningBlockerCover').style.display = null;
+
+            Game.startCountdown(0);
+            Game.timeoutEnd = null;
+        },
+
+        hideRestrictions: function () {
+            var restrictions = document.getElementById('restrictions');
+            if (restrictions) {
+                var header = restrictions.parentNode;
+                header.removeChild(restrictions);
+            }
+        },
+
+        transitToResultMap: function () {
+            // TODO: refactor - it is necessary for mobile
+            if (window.getComputedStyle(document.getElementById('guess')).visibility === 'hidden') {
+                document.getElementById('showGuessButton').click();
+            }
+
+            if (Game.adaptGuess) {
+                document.getElementById('guess').classList.remove('adapt');
+            }
+
+            if (Game.guessMarker) {
+                Game.guessMarker.setMap(null);
+                Game.guessMarker = null;
+            }
+
+            document.getElementById('guess').classList.add('result');
+
+            Game.map.setOptions({
+                draggableCursor: 'grab'
+            });
+
+            if (Game.rounds.length === Game.NUMBER_OF_ROUNDS) {
+                document.getElementById('continueButton').style.display = 'none';
+                document.getElementById('showSummaryButton').style.display = 'block';
+            } else if (Game.type == GameType.MULTI) {
+                if (Game.multi.owner) {
+                    if (!Game.readyToContinue) {
+                        document.getElementById('continueButton').disabled = true;
+                    }
+                } else {
+                    document.getElementById('continueButton').style.display = 'none';
+                }
+            }
+        },
+
+        loadHistory: function (response) {
+            if (!response.history)
+                return;
+
+            Game.history = response.history;
+
+            for (var i = 0; i < Game.rounds.length; ++i) {
+                var round = Game.rounds[i];
+
+                if (round.realMarker) {
+                    round.realMarker.setMap(null);
+                }
+                for (var j = 0; j < round.guessMarkers.length; ++j) {
+                    var guessMarker = round.guessMarkers[j];
+                    guessMarker.marker.setMap(null);
+                    guessMarker.line.setMap(null);
+                    if (guessMarker.info) {
+                        guessMarker.info.close();
+                    }
+                }
+            }
+            Game.rounds = [];
+
+            Game.scoreSum = 0;
+            for (var i = 0; i < Game.history.length; ++i) {
+                var round = Game.history[i];
+
+                if (round.result) {
+                    Game.rounds.push({ position: round.position, guessPosition: round.result.guessPosition, realMarker: null, guessMarkers: [] });
+                    Game.addPositionToResultMap(true);
+                    if (round.result.guessPosition) {
+                        Game.addGuessPositionToResultMap(round.result.guessPosition, round.result, true);
+                    }
+                    Game.scoreSum += round.result.score;
+
+
+                    if (round.allResults !== undefined) {
+                        for (var j = 0; j < round.allResults.length; ++j) {
+                            var result = round.allResults[j];
+                            if (result.guessPosition) {
+                                Game.addGuessPositionToResultMap(result.guessPosition, result, true);
+                            }
+                        }
+                    }
+                }
+            }
+        },
+
         reset: function () {
             if (Game.guessMarker) {
                 Game.guessMarker.setMap(null);
@@ -325,6 +518,7 @@
             distanceInfo.children[0].style.display = null;
             distanceInfo.children[1].style.display = null;
             distanceInfo.children[2].style.display = null;
+            document.getElementById('summaryInfo').innerHTML = "Game finished."
             var scoreInfo = document.getElementById('scoreInfo');
             scoreInfo.children[0].style.display = null;
             scoreInfo.children[1].style.display = null;
@@ -339,6 +533,13 @@
             // needs to be set visible after the show guess map hid it in mobile view
             document.getElementById("navigation").style.visibility = 'visible';
 
+            Game.disableRestrictions();
+            Game.hideRestrictions();
+
+            document.getElementById('panningBlockerCover').style.display = null;
+
+            Game.history = [];
+
             Game.initialize();
         },
 
@@ -391,6 +592,8 @@
             // update the compass
             const heading = Game.panorama.getPov().heading;
             document.getElementById("compass").style.transform = "translateY(-50%) rotate(" + heading + "deg)";
+
+            Game.enableRestrictions();
         },
 
         handleErrorResponse: function (error) {
@@ -411,7 +614,11 @@
                     break;
 
                 case 'game_not_found':
-                    MapGuesser.showModalWithContent('Error', 'The game room was not found by this ID. Please check the link.');
+                    MapGuesser.showModalWithContent('Error', 'The game was not found by this ID. Please check the link.');
+                    break;
+
+                case 'anonymous_user':
+                    MapGuesser.showModalWithContent('Error', 'You have to login to join a challenge!');
                     break;
 
                 default:
@@ -441,7 +648,7 @@
             resultBounds.extend(position);
 
             if (guessPosition) {
-                Game.addGuessPositionToResultMap(guessPosition);
+                Game.addGuessPositionToResultMap(guessPosition, result);
                 resultBounds.extend(guessPosition);
             }
 
@@ -477,25 +684,9 @@
         },
 
         showResultMap: function (result, resultBounds) {
-            // TODO: refactor - it is necessary for mobile
-            if (window.getComputedStyle(document.getElementById('guess')).visibility === 'hidden') {
-                document.getElementById('showGuessButton').click();
-            }
 
-            if (Game.adaptGuess) {
-                document.getElementById('guess').classList.remove('adapt');
-            }
+            Game.transitToResultMap();
 
-            if (Game.guessMarker) {
-                Game.guessMarker.setMap(null);
-                Game.guessMarker = null;
-            }
-
-            document.getElementById('guess').classList.add('result');
-
-            Game.map.setOptions({
-                draggableCursor: 'grab'
-            });
             Game.map.fitBounds(resultBounds);
 
             var distanceInfo = document.getElementById('distanceInfo');
@@ -514,38 +705,32 @@
             var scoreBar = document.getElementById('scoreBar');
             scoreBar.style.backgroundColor = scoreBarProperties.backgroundColor;
             scoreBar.style.width = scoreBarProperties.width;
-
-            if (Game.rounds.length === Game.NUMBER_OF_ROUNDS) {
-                document.getElementById('continueButton').style.display = 'none';
-                document.getElementById('showSummaryButton').style.display = 'block';
-            } else if (roomId) {
-                if (Game.multi.owner) {
-                    if (!Game.readyToContinue) {
-                        document.getElementById('continueButton').disabled = true;
-                    }
-                } else {
-                    document.getElementById('continueButton').style.display = 'none';
-                }
-            }
         },
 
         guess: function () {
-            if (!Game.guessMarker) {
-                return;
+
+            var data = new FormData();
+
+            if (Game.timeoutEnd) {
+                var timeLeft = Math.ceil((Game.timeoutEnd - new Date()) / 1000);
+                data.append('timeLeft', timeLeft);
             }
 
+            Game.disableRestrictions();
+
+            if (Game.guessMarker) {
                 var guessPosition = Game.guessMarker.getPosition().toJSON();
                 Game.rounds[Game.rounds.length - 1].guessPosition = guessPosition;
 
-            document.getElementById('guessButton').disabled = true;
-            document.getElementById('panoCover').style.visibility = 'visible';
-
-            var data = new FormData();
                 data.append('lat', String(guessPosition.lat));
                 data.append('lng', String(guessPosition.lng));
+            }
 
+            document.getElementById('guessButton').disabled = true;
+            document.getElementById('panoCover').style.visibility = 'visible';
             document.getElementById('loading').style.visibility = 'visible';
-            var url = roomId ? '/multiGame/' + roomId + '/guess.json' : '/game/' + mapId + '/guess.json';
+            var url = Game.getGameIdentifier() + '/guess.json';
+
             MapGuesser.httpRequest('POST', url, function () {
                 document.getElementById('loading').style.visibility = 'hidden';
 
@@ -554,12 +739,16 @@
                     return;
                 }
 
+                Game.loadHistory(this.response);
+                Game.restrictions = this.response.restrictions;
+
                 Game.receiveResult(this.response.position, guessPosition, this.response.result, this.response.allResults);
 
                 if (this.response.place) {
                     Game.panoId = this.response.place.panoId;
                     Game.pov = this.response.place.pov;
                 }
+
             }, data);
         },
 
@@ -593,8 +782,8 @@
             var position = round.position;
 
             var guessMarker = { marker: null, line: null, info: null };
-            var markerSvg = result ? 'marker-gray-empty.svg' : 'marker-blue-empty.svg';
-            var markerLabel = result ? result.userName.charAt(0).toUpperCase() : '?';
+            var markerSvg = result && result.userName ? 'marker-gray-empty.svg' : 'marker-blue-empty.svg';
+            var markerLabel = result && result.userName ? result.userName.charAt(0).toUpperCase() : '?';
 
             guessMarker.marker = new google.maps.Marker({
                 map: Game.map,
@@ -644,8 +833,9 @@
             });
 
             if (result) {
+                const userName = result.userName ? result.userName : 'me';
                 guessMarker.info = new google.maps.InfoWindow({
-                    content: '<p class="small bold">' + result.userName + '</p>' +
+                    content: '<p class="small bold">' + userName + '</p>' +
                         '<p class="small">' + Util.printDistanceForHuman(result.distance) + ' | ' + result.score + ' points</p>',
                 });
 
@@ -672,6 +862,36 @@
             return { width: percent + '%', backgroundColor: color };
         },
 
+        calculateHighScores: function () {
+
+            var highscores = new Map();
+            highscores.set('me', Game.scoreSum);
+
+            // collect the results of users who are through the last round
+            const round = Game.history[Game.history.length - 1];
+            if (round.allResults) {
+                for (const result of round.allResults) {
+                    highscores.set(result.userName, result.score);
+                }
+            }
+
+            // add up scores only for the finishers
+            for (var i = Game.history.length - 2; i >= 0; --i) {
+                const round = Game.history[i];
+                if (round.allResults) {
+                    for (const result of round.allResults) {
+                        if (highscores.has(result.userName)) {
+                            highscores.set(result.userName, highscores.get(result.userName) + result.score);
+                        }
+                    }
+                }
+            }
+
+            var sortedHighscores = Array.from(highscores, ([userName, score]) => ({ 'userName': userName, 'score': score }))
+                .sort(function (resultA, resultB) { return resultB.score - resultA.score });
+            return sortedHighscores;
+        },
+
         showSummary: function () {
             var distanceInfo = document.getElementById('distanceInfo');
             distanceInfo.children[0].style.display = 'none';
@@ -682,11 +902,13 @@
             scoreInfo.children[1].style.display = 'block';
             document.getElementById('showSummaryButton').style.display = null;
 
-            if (!roomId || Game.multi.owner) {
+            if (Game.type == GameType.SINGLE || Game.multi.owner) {
                 document.getElementById('startNewGameButton').style.display = 'block';
                 if (!Game.readyToContinue) {
                     document.getElementById('startNewGameButton').disabled = true;
                 }
+            } else if (Game.type == GameType.CHALLENGE) {
+                document.getElementById('goToStart').style.display = 'block';
             }
 
             var resultBounds = new google.maps.LatLngBounds();
@@ -729,6 +951,48 @@
             var scoreBar = document.getElementById('scoreBar');
             scoreBar.style.backgroundColor = scoreBarProperties.backgroundColor;
             scoreBar.style.width = scoreBarProperties.width;
+
+            Game.showHighscores();
+
+        },
+
+        showHighscores: function () {
+
+            if (Game.type == GameType.CHALLENGE) {
+                var highscores = this.calculateHighScores();
+                var summaryInfo = document.getElementById('summaryInfo');
+
+                if (highscores.length > 2) {
+                    var table = document.getElementById('highscoresTable');
+                    for (const result of highscores) {
+                        var userName = document.createElement('td');
+                        userName.innerHTML = result.userName;
+                        var score = document.createElement('td');
+                        score.innerHTML = result.score;
+                        var line = document.createElement('tr');
+                        line.appendChild(userName);
+                        line.appendChild(score);
+                        table.appendChild(line);
+
+                        if (result.userName === 'me') {
+                            line.setAttribute('class', 'ownPlayer');
+                        }
+                    }
+
+                    MapGuesser.showModal('highscores');
+                } else if (highscores.length == 2) {
+
+                    if (highscores[0].userName === 'me') {
+                        summaryInfo.innerHTML = 'You won! <span class="hideOnNarrowScreen">' + highscores[1].userName + ' got only ' + highscores[1].score + ' points.</span>';
+                    } else {
+                        summaryInfo.innerHTML = 'You lost! <span class="hideOnNarrowScreen">' + highscores[0].userName + ' won with ' + highscores[0].score + ' points.</span>';
+                    }
+
+                } else if (highscores.length == 1) {
+                    summaryInfo.innerHTML = 'You are the first to finish. <span class="hideOnNarrowScreen">Invite your friends by sending them the link.</span>'
+                }
+
+            }
         },
 
         rewriteGoogleLink: function () {
@@ -751,7 +1015,7 @@
             }, 1);
         },
 
-        startCountdown: function (timeout) {
+        startCountdown: function (timeout, timedOutHandler) {
             if (Game.countdownHandler) {
                 clearInterval(Game.countdownHandler);
             }
@@ -773,7 +1037,12 @@
                 Game.setCountdownTime(timeLeft);
 
                 if (timeLeft <= 0) {
+                    if (typeof timedOutHandler === 'function') {
+                        timedOutHandler();
+                    } else {
                         document.getElementById('panoCover').style.visibility = 'visible';
+                    }
+
                     clearInterval(Game.countdownHandler);
                 }
             }, 1000);
@@ -876,6 +1145,12 @@
         document.getElementById("compass").style.transform = "translateY(-50%) rotate(" + heading + "deg)";
     });
 
+    if (roomId !== null) {
+        Game.type = GameType.MULTI;
+    } else if (challengeToken !== null) {
+        Game.type = GameType.CHALLENGE;
+    }
+
     if (COOKIES_CONSENT) {
         Game.prepare();
     }
@@ -965,4 +1240,8 @@
     document.getElementById('compassContainer').onclick = function () {
         Game.panorama.setPov({ heading: 0, pitch: Game.panorama.getPov().pitch });
     }
+
+    document.getElementById('closeHighscoresButton').onclick = function () {
+        MapGuesser.hideModal();
+    };
 })();

public/static/js/maps.js

@@ -65,6 +65,32 @@
         }
     };
 
+    var Util = {
+        printTimeForHuman: function (time) {
+            const minutes = Math.floor(time / 60);
+            const seconds = time % 60;
+            var time_str = ''; 
+
+            if (minutes == 1) {
+                time_str += '1 minute';
+            } else if (minutes > 1) {
+                time_str += minutes + ' minutes';
+            }
+
+            if (minutes > 0 && seconds > 0) {
+                time_str += ' and ';
+            }
+
+            if (seconds == 1) {
+                time_str += '1 second';
+            } else if (seconds > 1) {
+                time_str += seconds + ' seconds';
+            }
+
+            return time_str;
+        }
+    };
+
     Maps.addStaticMaps();
 
     Maps.initializeDescriptionDivs();
@@ -85,10 +111,42 @@
         window.location.href = '/multiGame/' + this.elements.roomId.value;
     };
 
+    document.getElementById('challengeForm').onsubmit = function (e) {
+        e.preventDefault();
+
+        var url = '/challenge/create.json';
+        var formData = new FormData(this);
+
+        document.getElementById('loading').style.visibility = 'visible';
+        MapGuesser.httpRequest('POST', url, function() {
+            document.getElementById('loading').style.visibility = 'hidden';
+
+            if (this.response.error) {
+                Game.handleErrorResponse(this.response.error);
+                return;
+            }
+
+            window.location.href = '/challenge/' + this.response.challengeToken;
+
+        }, formData);
+    };
+
     document.getElementById('multiButton').onclick = function () {
         MapGuesser.showModal('multi');
         document.getElementById('createNewRoomButton').href = '/multiGame/new/' + this.dataset.mapId;
         document.getElementById('multiForm').elements.roomId.select();
+        document.getElementById('playMode').style.visibility = 'hidden';
+    }
+
+    if (document.getElementById('challengeButton')) {
+        document.getElementById('challengeButton').onclick = function () {
+            MapGuesser.showModal('challenge');
+            document.getElementById('createNewChallengeButton').href = '/challenge/new/' + this.dataset.mapId;
+            document.getElementById('playMode').style.visibility = 'hidden';
+            
+            var timeLimit = document.getElementById('timeLimit').value;
+            document.getElementById('timeLimitLabel').innerText = 'Time limit of ' + Util.printTimeForHuman(timeLimit);
+        };
     }
 
     document.getElementById('closePlayModeButton').onclick = function () {
@@ -99,6 +157,10 @@
         MapGuesser.hideModal();
     };
 
+    document.getElementById('closeChallengeButton').onclick = function () {
+        MapGuesser.hideModal();
+    }
+
     var buttons = document.getElementById('mapContainer').getElementsByClassName('playButton');
     for (var i = 0; i < buttons.length; i++) {
         var button = buttons[i];
@@ -107,6 +169,13 @@
             MapGuesser.showModal('playMode');
             document.getElementById('singleButton').href = '/game/' + this.dataset.mapId;
             document.getElementById('multiButton').dataset.mapId = this.dataset.mapId;
+            document.getElementById('challengeMapId').value = this.dataset.mapId;
         };
     }
+
+    document.getElementById('timeLimit').oninput = function () {
+        var timeLimit = document.getElementById('timeLimit').value;
+        document.getElementById('timeLimitLabel').innerText = 'Time limit of ' + Util.printTimeForHuman(timeLimit);
+        document.getElementById('timerEnabled').checked = true;
+    }
 })();

src/Controller/GameController.php

@@ -9,14 +9,22 @@ use MapGuesser\Response\JsonContent;
 use MapGuesser\Interfaces\Response\IContent;
 use MapGuesser\Interfaces\Response\IRedirect;
 use MapGuesser\Multi\MultiConnector;
+use MapGuesser\PersistentData\Model\Challenge;
 use MapGuesser\PersistentData\Model\MultiRoom;
+use MapGuesser\PersistentData\Model\PlaceInChallenge;
+use MapGuesser\PersistentData\Model\UserInChallenge;
 use MapGuesser\PersistentData\PersistentDataManager;
+use MapGuesser\Repository\ChallengeRepository;
 use MapGuesser\Repository\MapRepository;
 use MapGuesser\Repository\MultiRoomRepository;
+use MapGuesser\Repository\PlaceRepository;
+use MapGuesser\Repository\UserInChallengeRepository;
 use MapGuesser\Response\Redirect;
 
 class GameController implements ISecured
 {
+    const NUMBER_OF_ROUNDS = 5;
+
     private IRequest $request;
 
     private PersistentDataManager $pdm;
@@ -27,6 +35,12 @@ class GameController implements ISecured
 
     private MapRepository $mapRepository;
 
+    private PlaceRepository $placeRepository;
+
+    private ChallengeRepository $challengeRepository;
+
+    private UserInChallengeRepository $userInChallengeRepository;
+
     public function __construct(IRequest $request)
     {
         $this->request = $request;
@@ -34,6 +48,9 @@ class GameController implements ISecured
         $this->multiConnector = new MultiConnector();
         $this->multiRoomRepository = new MultiRoomRepository();
         $this->mapRepository = new MapRepository();
+        $this->placeRepository = new PlaceRepository();
+        $this->challengeRepository = new ChallengeRepository();
+        $this->userInChallengeRepository = new UserInChallengeRepository();
     }
 
     public function authorize(): bool
@@ -85,6 +102,75 @@ class GameController implements ISecured
         return new HtmlContent('game', ['roomId' => $roomId]);
     }
 
+    public function getChallenge(): IContent
+    {   
+        $challengeToken = $this->request->query('challengeToken');
+
+        return new HtmlContent('game', ['challengeToken' => $challengeToken]);
+    }
+
+    public function createNewChallenge(): IContent
+    {
+        // create Challenge
+        do {
+            // initiliaze or if a challenge with the same token already exists
+            $challengeToken = mt_rand();
+        } while ($this->challengeRepository->getByToken($challengeToken));
+
+        $challenge = new Challenge();
+        $challenge->setToken($challengeToken);
+        $challenge->setCreatedDate(new DateTime());
+        
+        if ($this->request->post('timerEnabled') !== null && $this->request->post('timeLimit') !== null) {
+            $challenge->setTimeLimit($this->request->post('timeLimit'));
+        }
+        if ($this->request->post('timeLimitType') !== null) {
+            $challenge->setTimeLimitType($this->request->post('timeLimitType'));
+        }
+        if ($this->request->post('noMove') !== null) {
+            $challenge->setNoMove(true);
+        }
+        if ($this->request->post('noPan') !== null) {
+            $challenge->setNoPan(true);
+        }
+        if ($this->request->post('noZoom') !== null) {
+            $challenge->setNoZoom(true);
+        }
+
+        $this->pdm->saveToDb($challenge);
+
+        // save owner/creator
+
+        $session = $this->request->session();
+        $userId = $session->get('userId');
+
+        $userInChallenge = new UserInChallenge();
+        $userInChallenge->setUserId($userId);
+        $userInChallenge->setChallenge($challenge);
+        $userInChallenge->setTimeLeft($challenge->getTimeLimit());
+        $userInChallenge->setIsOwner(true);
+
+        $this->pdm->saveToDb($userInChallenge);
+
+        // select places
+
+        $mapId = (int) $this->request->post('mapId');
+        // $map = $this->mapRepository->getById($mapId);
+
+        $places = $this->placeRepository->getRandomNPlaces($mapId, static::NUMBER_OF_ROUNDS, $userId);
+
+        $round = 0;
+        foreach ($places as $place) {
+            $placeInChallenge = new PlaceInChallenge();
+            $placeInChallenge->setPlace($place);
+            $placeInChallenge->setChallenge($challenge);
+            $placeInChallenge->setRound($round++);
+            $this->pdm->saveToDb($placeInChallenge);
+        }
+
+        return new JsonContent(['challengeToken' => dechex($challengeToken)]);
+    }
+
     public function prepareGame(): IContent
     {
         $mapId = (int) $this->request->query('mapId');
@@ -121,7 +207,7 @@ class GameController implements ISecured
 
         $room = $this->multiRoomRepository->getByRoomId($roomId);
 
-        if(!isset($room)) {
+        if (!isset($room)) {
             return new JsonContent(['error' => 'game_not_found']);
         }
 
@@ -160,6 +246,42 @@ class GameController implements ISecured
         ]);
     }
 
+    public function prepareChallenge(): IContent
+    {
+        $challengeToken_str = $this->request->query('challengeToken');
+        $session = $this->request->session();
+        $userId = $session->get('userId');
+
+        if (!isset($userId))
+        {
+            return new JsonContent(['error' => 'anonymous_user']);
+        }
+
+        $challenge = $this->challengeRepository->getByTokenStr($challengeToken_str);
+
+        if (!isset($challenge))
+        {
+            return new JsonContent(['error' => 'game_not_found']);
+        }
+
+        if (!$this->userInChallengeRepository->isUserParticipatingInChallenge($userId, $challenge)) {
+            // new player is joining
+            $userInChallenge = new UserInChallenge();
+            $userInChallenge->setUserId($userId);
+            $userInChallenge->setChallenge($challenge);
+            $userInChallenge->setTimeLeft($challenge->getTimeLimit());
+            $this->pdm->saveToDb($userInChallenge);
+        }
+
+        $map = $this->mapRepository->getByChallenge($challenge);
+
+        return new JsonContent([
+            'mapId' => $map->getId(),
+            'mapName' => $map->getName(),
+            'bounds' => $map->getBounds()->toArray()
+        ]);
+    }
+
     private function getMultiToken(string $roomId): string
     {
         $session = $this->request->session();

src/Controller/GameFlowController.php

@@ -8,10 +8,22 @@ use MapGuesser\Response\JsonContent;
 use MapGuesser\Interfaces\Response\IContent;
 use MapGuesser\Multi\MultiConnector;
 use MapGuesser\PersistentData\PersistentDataManager;
+use MapGuesser\PersistentData\Model\Challenge;
+use MapGuesser\PersistentData\Model\Guess;
+use MapGuesser\PersistentData\Model\Map;
+use MapGuesser\PersistentData\Model\Place;
+use MapGuesser\PersistentData\Model\PlaceInChallenge;
+use MapGuesser\PersistentData\Model\User;
 use MapGuesser\PersistentData\Model\UserPlayedPlace;
+use MapGuesser\Repository\ChallengeRepository;
+use MapGuesser\Repository\GuessRepository;
+use MapGuesser\Repository\MapRepository;
 use MapGuesser\Repository\MultiRoomRepository;
+use MapGuesser\Repository\PlaceInChallengeRepository;
 use MapGuesser\Repository\PlaceRepository;
+use MapGuesser\Repository\UserInChallengeRepository;
 use MapGuesser\Repository\UserPlayedPlaceRepository;
+use MapGuesser\Repository\UserRepository;
 
 class GameFlowController implements ISecured
 {
@@ -28,8 +40,20 @@ class GameFlowController implements ISecured
 
     private PlaceRepository $placeRepository;
 
+    private MapRepository $mapRepository;
+
+    private UserRepository $userRepository;
+
     private UserPlayedPlaceRepository $userPlayedPlaceRepository;
 
+    private ChallengeRepository $challengeRepository;
+
+    private UserInChallengeRepository $userInChallengeRepository;
+
+    private PlaceInChallengeRepository $placeInChallengeRepository;
+
+    private GuessRepository $guessRepository;
+
     public function __construct(IRequest $request)
     {
         $this->request = $request;
@@ -37,7 +61,13 @@ class GameFlowController implements ISecured
         $this->multiConnector = new MultiConnector();
         $this->multiRoomRepository = new MultiRoomRepository();
         $this->placeRepository = new PlaceRepository();
+        $this->mapRepository = new MapRepository();
+        $this->userRepository = new UserRepository();
         $this->userPlayedPlaceRepository = new UserPlayedPlaceRepository();
+        $this->challengeRepository = new ChallengeRepository();
+        $this->userInChallengeRepository = new UserInChallengeRepository();
+        $this->placeInChallengeRepository = new PlaceInChallengeRepository();
+        $this->guessRepository = new GuessRepository();
     }
 
     public function authorize(): bool
@@ -121,6 +151,110 @@ class GameFlowController implements ISecured
         return new JsonContent(['ok' => true]);
     }
 
+    private function prepareChallengeResponse(int $userId, Challenge $challenge, int $currentRound, bool $withHistory = false): array
+    {
+        $currentPlace = $this->placeRepository->getByRoundInChallenge($challenge, $currentRound);
+        
+        // if the last round was played ($currentPlace == null) or history is explicitly requested (for initializing)
+        if (!isset($currentPlace) || $withHistory) {
+
+            $withRelations = [User::class, PlaceInChallenge::class, Place::class];
+            foreach ($this->guessRepository->getAllInChallenge($challenge, $withRelations) as $guess) { 
+                $round = $guess->getPlaceInChallenge()->getRound();
+    
+                if ($guess->getUser()->getId() === $userId) {
+                    $response['history'][$round]['position'] = 
+                            $guess->getPlaceInChallenge()->getPlace()->getPosition()->toArray();
+                    $response['history'][$round]['result'] = [
+                            'guessPosition' => $guess->getPosition()->toArray(),
+                            'distance' => $guess->getDistance(),
+                            'score' => $guess->getScore()
+                    ];
+                } else {
+                    $response['history'][$round]['allResults'][] = [
+                        'userName' => $guess->getUser()->getDisplayName(),
+                        'guessPosition' => $guess->getPosition()->toArray(),
+                        'distance' => $guess->getDistance(),
+                        'score' => $guess->getScore()
+                    ];
+                }
+            }
+
+            // setting default values for rounds without guesses (because of timeout)
+            for ($i = 0; $i < $currentRound; ++$i) {
+                if (!isset($response['history'][$i]) || !isset($response['history'][$i]['result'])) {
+                    $response['history'][$i]['result'] = [
+                            'guessPosition' => null,
+                            'distance' => null,
+                            'score' => 0
+                    ];
+                    
+                    $response['history'][$i]['position'] = 
+                            $this->placeRepository->getByRoundInChallenge($challenge, $i)->getPosition()->toArray();
+                }
+            }
+
+            $response['history']['length'] = $currentRound;
+        }
+
+        if (!isset($currentPlace)) { // game finished
+            $response['finished'] = true;
+        } else { // continue game
+            $response['place'] = [
+                'panoId' => $currentPlace->getPanoIdCached(),
+                'pov' => $currentPlace->getPov()->toArray()
+            ];
+
+            $prevRound = $currentRound - 1;
+            if ($prevRound >= 0) {
+                foreach ($this->guessRepository->getAllInChallengeByRound($prevRound, $challenge, [User::class]) as $guess) {
+                    if ($guess->getUser()->getId() != $userId) {
+                        $response['allResults'][] = [
+                            'userName' => $guess->getUser()->getDisplayName(),
+                            'guessPosition' => $guess->getPosition()->toArray(),
+                            'distance' => $guess->getDistance(),
+                            'score' => $guess->getScore()
+                        ];
+                    }
+                }
+            }
+        }
+
+        $response['restrictions'] = [
+            'timeLimit' => $challenge->getTimeLimit() * 1000,
+            'timeLimitType' => $challenge->getTimeLimitType(),
+            'noMove' => $challenge->getNoMove(),
+            'noPan' => $challenge->getNoPan(),
+            'noZoom' => $challenge->getNoZoom()
+        ];
+
+        return $response;
+    }
+
+    public function challengeInitialData(): IContent
+    {
+        $session = $this->request->session();
+        $userId = $session->get('userId');
+        $challengeToken_str = $this->request->query('challengeToken');
+        $userInChallenge = $this->userInChallengeRepository->getByUserIdAndToken($userId, $challengeToken_str, [Challenge::class]);
+
+        if (!isset($userInChallenge)) {
+            return new JsonContent(['error' => 'game_not_found']);
+        }
+
+        $challenge = $userInChallenge->getChallenge();
+        $currentRound = $userInChallenge->getCurrentRound();
+
+        $response = $this->prepareChallengeResponse($userId, $challenge, $currentRound, true);
+
+        if ($challenge->getTimeLimitType() === 'game' && $challenge->getTimeLimit() !== null && $userInChallenge->getCurrentRound() > 0) {
+            $timeLimit = max(10, $userInChallenge->getTimeLeft());
+            $response['restrictions']['timeLimit'] = $timeLimit * 1000;
+        } 
+
+        return new JsonContent($response);
+    }
+
     public function guess(): IContent
     {
         $mapId = (int) $this->request->query('mapId');
@@ -132,7 +266,7 @@ class GameFlowController implements ISecured
 
         $last = $state['rounds'][$state['currentRound']];
         $guessPosition = new Position((float) $this->request->post('lat'), (float) $this->request->post('lng'));
-        $result = $this->evalueteGuess($last['position'], $guessPosition, $state['area']);
+        $result = $this->evaluateGuess($last['position'], $guessPosition, $state['area']);
 
         $last['guessPosition'] = $guessPosition;
         $last['distance'] = $result['distance'];
@@ -156,21 +290,20 @@ class GameFlowController implements ISecured
 
         $session->set('state', $state);
 
-        $this->saveVisit($last);
+        $this->saveVisit($last['placeId']);
 
         return new JsonContent($response);
     }
 
     // save the selected place for the round in UserPlayedPlace
-    private function saveVisit($last): void
+    private function saveVisit($placeId): void
     {
         $session = $this->request->session();
         $userId = $session->get('userId');
 
-        if(isset($userId)) {
-            $placeId = $last['placeId'];
+        if (isset($userId)) {
             $userPlayedPlace = $this->userPlayedPlaceRepository->getByUserIdAndPlaceId($userId, $placeId);
-            if(!$userPlayedPlace) {
+            if (!$userPlayedPlace) {
                 $userPlayedPlace = new UserPlayedPlace();
                 $userPlayedPlace->setUserId($userId);
                 $userPlayedPlace->setPlaceId($placeId);
@@ -196,7 +329,7 @@ class GameFlowController implements ISecured
 
         $last = $state['rounds'][$state['currentRound']];
         $guessPosition = new Position((float) $this->request->post('lat'), (float) $this->request->post('lng'));
-        $result = $this->evalueteGuess($last['position'], $guessPosition, $state['area']);
+        $result = $this->evaluateGuess($last['position'], $guessPosition, $state['area']);
 
         $responseFromMulti = $this->multiConnector->sendMessage('guess', [
             'roomId' => $roomId,
@@ -219,6 +352,70 @@ class GameFlowController implements ISecured
         return new JsonContent($response);
     }
 
+    public function challengeGuess(): IContent
+    {
+        $session = $this->request->session();
+        $userId = $session->get('userId');
+        $challengeToken_str = $this->request->query('challengeToken');
+        $userInChallenge = $this->userInChallengeRepository->getByUserIdAndToken($userId, $challengeToken_str, [Challenge::class]);
+
+        if (!isset($userInChallenge)) {
+            return new JsonContent(['error' => 'game_not_found']);
+        }
+
+        $challenge = $userInChallenge->getChallenge();
+        $currentRound = $userInChallenge->getCurrentRound();
+        $currentPlaceInChallenge = $this->placeInChallengeRepository->getByRoundInChallenge($currentRound, $challenge, [Place::class, Map::class]);
+        $currentPlace = $currentPlaceInChallenge->getPlace();
+        $map = $currentPlace->getMap();
+
+        // creating response
+        $nextRound = $currentRound + 1;
+        $response = $this->prepareChallengeResponse($userId, $challenge, $nextRound);
+        $response['position'] = $currentPlace->getPosition()->toArray();
+
+        if ($this->request->post('lat') && $this->request->post('lng')) {
+            $guessPosition = new Position((float) $this->request->post('lat'), (float) $this->request->post('lng'));
+            $result = $this->evaluateGuess($currentPlace->getPosition(), $guessPosition, $map->getArea());
+
+            // save guess
+            $guess = new Guess();
+            $guess->setUserId($userId);
+            $guess->setPlaceInChallenge($currentPlaceInChallenge);
+            $guess->setPosition($guessPosition);
+            $guess->setDistance($result['distance']);
+            $guess->setScore($result['score']);
+            $this->pdm->saveToDb($guess);
+
+            $response['result'] = $result;
+
+        } else {
+            // user didn't manage to guess in the round in the given timeframe
+            $response['result'] = ['distance' => null, 'score' => 0];
+        }
+
+        // save user relevant state of challenge
+        $userInChallenge->setCurrentRound($nextRound);
+        $timeLeft = $this->request->post('timeLeft');
+        if (isset($timeLeft)) {
+            $userInChallenge->setTimeLeft(intval($timeLeft));
+        }
+        $this->pdm->saveToDb($userInChallenge);
+
+        if ($challenge->getTimeLimitType() === 'game' && isset($timeLeft)) {
+            $timeLimit = max(10, intval($timeLeft));
+            $response['restrictions']['timeLimit'] = $timeLimit * 1000;
+        }
+
+        if (isset($response['history'][$currentRound]['allResults'])) {
+            $response['allResults'] = $response['history'][$currentRound]['allResults'];
+        }
+
+        $this->saveVisit($currentPlace->getId());
+
+        return new JsonContent($response);
+    }
+
     public function multiNextRound(): IContent
     {
         $roomId = $this->request->query('roomId');
@@ -248,7 +445,7 @@ class GameFlowController implements ISecured
         return new JsonContent(['ok' => true]);
     }
 
-    private function evalueteGuess(Position $realPosition, Position $guessPosition, float $area)
+    private function evaluateGuess(Position $realPosition, Position $guessPosition, float $area)
     {
         $distance = $this->calculateDistance($realPosition, $guessPosition);
         $score = $this->calculateScore($distance, $area);

src/Controller/MapAdminController.php

@@ -5,11 +5,16 @@ use MapGuesser\Interfaces\Authentication\IUser;
 use MapGuesser\Interfaces\Authorization\ISecured;
 use MapGuesser\Interfaces\Request\IRequest;
 use MapGuesser\Interfaces\Response\IContent;
+use MapGuesser\PersistentData\Model\Challenge;
 use MapGuesser\PersistentData\Model\Map;
 use MapGuesser\PersistentData\Model\Place;
 use MapGuesser\PersistentData\PersistentDataManager;
+use MapGuesser\Repository\ChallengeRepository;
+use MapGuesser\Repository\GuessRepository;
 use MapGuesser\Repository\MapRepository;
+use MapGuesser\Repository\PlaceInChallengeRepository;
 use MapGuesser\Repository\PlaceRepository;
+use MapGuesser\Repository\UserInChallengeRepository;
 use MapGuesser\Repository\UserPlayedPlaceRepository;
 use MapGuesser\Response\HtmlContent;
 use MapGuesser\Response\JsonContent;
@@ -30,6 +35,14 @@ class MapAdminController implements ISecured
 
     private UserPlayedPlaceRepository $userPlayedPlaceRepository;
 
+    private ChallengeRepository $challengeRepository;
+
+    private GuessRepository $guessRepository;
+
+    private PlaceInChallengeRepository $placeInChallengeRepository;
+
+    private UserInChallengeRepository $userInChallengeRepository;
+
     public function __construct(IRequest $request)
     {
         $this->request = $request;
@@ -37,6 +50,10 @@ class MapAdminController implements ISecured
         $this->mapRepository = new MapRepository();
         $this->placeRepository = new PlaceRepository();
         $this->userPlayedPlaceRepository = new UserPlayedPlaceRepository();
+        $this->challengeRepository = new ChallengeRepository();
+        $this->guessRepository = new GuessRepository();
+        $this->placeInChallengeRepository = new PlaceInChallengeRepository();
+        $this->userInChallengeRepository = new UserInChallengeRepository();
     }
 
     public function authorize(): bool
@@ -188,6 +205,10 @@ class MapAdminController implements ISecured
             $this->pdm->deleteFromDb($userPlayedPlace);
         }
 
+        foreach ($this->challengeRepository->getAllByPlace($place) as $challenge) {
+            $this->deleteChallenge($challenge);
+        }
+
         $this->pdm->deleteFromDb($place);
     }
 
@@ -198,6 +219,23 @@ class MapAdminController implements ISecured
         }
     }
 
+    private function deleteChallenge(Challenge $challenge): void
+    {
+        foreach ($this->userInChallengeRepository->getAllByChallenge($challenge) as $userInChallenge) {
+            $this->pdm->deleteFromDb($userInChallenge);
+        }
+
+        foreach ($this->guessRepository->getAllInChallenge($challenge, [PlaceInChallenge::class]) as $guess) {
+            $this->pdm->deleteFromDb($guess);
+        }
+
+        foreach ($this->placeInChallengeRepository->getAllByChallenge($challenge) as $placeInChallenge) {
+            $this->pdm->deleteFromDb($placeInChallenge);
+        }
+
+        $this->pdm->deleteFromDb($challenge);
+    }
+
     private function calculateMapBounds(Map $map): Bounds
     {
         $bounds = new Bounds();

src/Controller/MapsController.php

@@ -48,6 +48,7 @@ class MapsController
         $user = $this->request->user();
         return new HtmlContent('maps', [
             'maps' => $maps,
+            'isLoggedIn' => $user !== null,
             'isAdmin' => $user !== null && $user->hasPermission(IUser::PERMISSION_ADMIN)
         ]);
     }

src/Controller/UserController.php

@@ -9,7 +9,10 @@ use MapGuesser\Interfaces\Response\IRedirect;
 use MapGuesser\OAuth\GoogleOAuth;
 use MapGuesser\PersistentData\PersistentDataManager;
 use MapGuesser\PersistentData\Model\User;
+use MapGuesser\PersistentData\Model\UserInChallenge;
+use MapGuesser\Repository\GuessRepository;
 use MapGuesser\Repository\UserConfirmationRepository;
+use MapGuesser\Repository\UserInChallengeRepository;
 use MapGuesser\Repository\UserPasswordResetterRepository;
 use MapGuesser\Repository\UserPlayedPlaceRepository;
 use MapGuesser\Response\HtmlContent;
@@ -29,6 +32,10 @@ class UserController implements ISecured
 
     private UserPlayedPlaceRepository $userPlayedPlaceRepository;
 
+    private UserInChallengeRepository $userInChallengeRepository;
+
+    private GuessRepository $guessRepository;
+
     public function __construct(IRequest $request)
     {
         $this->request = $request;
@@ -36,6 +43,8 @@ class UserController implements ISecured
         $this->userConfirmationRepository = new UserConfirmationRepository();
         $this->userPasswordResetterRepository = new UserPasswordResetterRepository();
         $this->userPlayedPlaceRepository = new UserPlayedPlaceRepository();
+        $this->userInChallengeRepository = new UserInChallengeRepository();
+        $this->guessRepository = new GuessRepository();
     }
 
     public function authorize(): bool
@@ -209,6 +218,14 @@ class UserController implements ISecured
             $this->pdm->deleteFromDb($userPlayedPlace);
         }
 
+        foreach ($this->userInChallengeRepository->getAllByUser($user) as $userInChallenge) {
+            $this->pdm->deleteFromDb($userInChallenge);
+        }
+
+        foreach ($this->guessRepository->getAllByUser($user) as $guess) {
+            $this->pdm->deleteFromDb($guess);
+        }
+
         $this->pdm->deleteFromDb($user);
 
         \Container::$dbConnection->commit();

src/Database/Query/Select.php

@@ -261,7 +261,7 @@ class Select
             $queryString .= ' LIMIT ' . $this->limit[1] . ', ' . $this->limit[0];
         }
 
-        if($this->isDerivedTable()) {
+        if ($this->isDerivedTable()) {
             $queryString = '(' . $queryString . ') AS ' . $this->tableAliases[Select::DERIVED_TABLE_KEY];
         }
 
@@ -276,7 +276,7 @@ class Select
             return [(string) $table, $params];
         }
 
-        if($table instanceof Select)
+        if ($table instanceof Select)
         {
             return $table->generateQuery();
         }
@@ -332,7 +332,7 @@ class Select
         $joinQueries = [];
         $params = [];
 
-        foreach($this->joins as $join) {
+        foreach ($this->joins as $join) {
             list($joinQueryFragment, $paramsFragment) = $this->generateTable($join[1], true);
             $joinQueries[] = $join[0] . ' JOIN ' . $joinQueryFragment . ' ON ' . $this->generateColumn($join[2]) . ' ' . $join[3] . ' ' . $this->generateColumn($join[4]);
             $params = array_merge($params, $paramsFragment);

src/PersistentData/Model/Challenge.php

@@ -0,0 +1,112 @@
+<?php namespace MapGuesser\PersistentData\Model;
+
+use DateTime;
+
+class Challenge extends Model
+{
+    protected static string $table = 'challenges';
+
+    protected static array $fields = ['token', 'time_limit', 'time_limit_type', 'no_move', 'no_pan', 'no_zoom', 'created'];
+
+    protected static array $relations = [];
+
+    private int $token;
+
+    private ?int $timeLimit = null;
+
+    private static array $timeLimitTypes = ['game', 'round'];
+
+    private string $timeLimitType = 'game';
+
+    private bool $noMove = false;
+
+    private bool $noPan = false;
+
+    private bool $noZoom = false;
+
+    private DateTime $created;
+
+    public function setToken(int $token): void
+    {
+        $this->token = $token;
+    }
+
+    public function setTimeLimit(?int $timeLimit): void
+    {
+        if (isset($timeLimit)) {
+            $this->timeLimit = $timeLimit;
+        }
+    }
+
+    public function setTimeLimitType(string $timeLimitType): void
+    {
+        if (in_array($timeLimitType, self::$timeLimitTypes)) {
+            $this->timeLimitType = $timeLimitType;
+        }
+    }
+
+    public function setNoMove(bool $noMove): void
+    {
+        $this->noMove = $noMove;
+    }
+
+    public function setNoPan(bool $noPan): void
+    {
+        $this->noPan = $noPan;
+    }
+
+    public function setNoZoom(bool $noZoom): void
+    {
+        $this->noZoom = $noZoom;
+    }
+
+    public function setCreatedDate(DateTime $created): void
+    {
+        $this->created = $created;
+    }
+
+    public function setCreated(string $created): void
+    {
+        $this->created = new DateTime($created);
+    }
+
+    public function getToken(): int
+    {
+        return $this->token;
+    }
+
+    public function getTimeLimit(): ?int
+    {
+        return $this->timeLimit;
+    }
+
+    public function getTimeLimitType(): string
+    {
+        return $this->timeLimitType;
+    }
+
+    public function getNoMove(): bool
+    {
+        return $this->noMove;
+    }
+
+    public function getNoPan(): bool
+    {
+        return $this->noPan;
+    }
+
+    public function getNoZoom(): bool
+    {
+        return $this->noZoom;
+    }
+
+    public function getCreatedDate(): DateTime
+    {
+        return $this->created;
+    }
+
+    public function getCreated(): string
+    {
+        return $this->created->format('Y-m-d H:i:s');
+    }
+}

src/PersistentData/Model/Guess.php

@@ -0,0 +1,133 @@
+<?php namespace MapGuesser\PersistentData\Model;
+
+use MapGuesser\Util\Geo\Position;
+
+class Guess extends Model
+{
+    protected static string $table = 'guesses';
+
+    protected static array $fields = ['user_id', 'place_in_challenge_id', 'lat', 'lng', 'score', 'distance', 'time_spent'];
+
+    protected static array $relations = ['user' => User::class, 'place_in_challenge' => PlaceInChallenge::class];
+
+    private ?User $user = null;
+
+    private ?int $userId = null;
+
+    private ?PlaceInChallenge $placeInChallenge = null;
+
+    private ?int $placeInChallengeId = null;
+
+    private Position $position;
+
+    private int $score = 0;
+
+    private int $distance = 0;
+
+    private int $timeSpent = 0;
+
+    public function __construct()
+    {
+        $this->position = new Position(0.0, 0.0);
+    }
+
+    public function setUser(User $user): void
+    {
+        $this->user = $user;
+    }
+
+    public function setUserId(int $userId): void
+    {
+        $this->userId = $userId;
+    }
+
+    public function setPlaceInChallenge(PlaceInChallenge $placeInChallenge): void
+    {
+        $this->placeInChallenge = $placeInChallenge;
+    }
+
+    public function setPlaceInChallengeId(int $placeInChallengeId): void
+    {
+        $this->placeInChallengeId = $placeInChallengeId;
+    }
+
+    public function setPosition(Position $position): void
+    {
+        $this->position = $position;
+    }
+
+    public function setLat(float $lat): void
+    {
+        $this->position->setLat($lat);
+    }
+
+    public function setLng(float $lng): void
+    {
+        $this->position->setLng($lng);
+    }
+
+    public function setScore(int $score): void
+    {
+        $this->score = $score;
+    }
+
+    public function setDistance(int $distance): void
+    {
+        $this->distance = $distance;
+    }
+
+    public function setTimeSpent(int $timeSpent): void
+    {
+        $this->timeSpent = $timeSpent;
+    }
+
+    public function getUser(): ?User
+    {
+        return $this->user;
+    }
+
+    public function getUserId(): ?int
+    {
+        return $this->userId;
+    }
+
+    public function getPlaceInChallenge(): ?PlaceInChallenge
+    {
+        return $this->placeInChallenge;
+    }
+
+    public function getPlaceInChallengeId(): ?int
+    {
+        return $this->placeInChallengeId;
+    }
+
+    public function getPosition(): Position
+    {
+        return $this->position;
+    }
+
+    public function getLat(): float
+    {
+        return $this->position->getLat();
+    }
+
+    public function getLng(): float
+    {
+        return $this->position->getLng();
+    }
+
+    public function getScore(): int
+    {
+        return $this->score;
+    }
+
+    public function getDistance(): int
+    {
+        return $this->distance;
+    }
+
+    public function getTimeSpent(): ?int
+    {
+        return $this->timeSpent;
+    }
+}

src/PersistentData/Model/PlaceInChallenge.php

@@ -0,0 +1,70 @@
+<?php namespace MapGuesser\PersistentData\Model;
+
+class PlaceInChallenge extends Model
+{
+    protected static string $table = 'place_in_challenge';
+
+    protected static array $fields = ['place_id', 'challenge_id', 'round'];
+
+    protected static array $relations = ['place' => Place::class, 'challenge' => Challenge::class];
+
+    private ?Place $place = null;
+
+    private ?int $placeId = null;
+
+    private ?Challenge $challenge = null;
+
+    private ?int $challengeId = null;
+
+    private int $round;
+
+    public function setPlace(Place $place): void
+    {
+        $this->place = $place;
+    }
+
+    public function setPlaceId(int $placeId): void
+    {
+        $this->placeId = $placeId;
+    }
+
+    public function setChallenge(Challenge $challenge): void
+    {
+        $this->challenge = $challenge;
+    }
+
+    public function setChallengeId(int $challengeId): void
+    {
+        $this->challengeId = $challengeId;
+    }
+
+    public function setRound(int $round): void
+    {
+        $this->round = $round;
+    }
+
+    public function getPlace(): ?Place
+    {
+        return $this->place;
+    }
+
+    public function getPlaceId(): ?int
+    {
+        return $this->placeId;
+    }
+
+    public function getChallenge(): ?Challenge
+    {
+        return $this->challenge;
+    }
+
+    public function getChallengeId(): ?int
+    {
+        return $this->challengeId;
+    }
+
+    public function getRound(): int
+    {
+        return $this->round;
+    }
+}

src/PersistentData/Model/UserInChallenge.php

@@ -0,0 +1,96 @@
+<?php namespace MapGuesser\PersistentData\Model;
+
+class UserInChallenge extends Model
+{
+    protected static string $table = 'user_in_challenge';
+
+    protected static array $fields = ['user_id', 'challenge_id', 'current_round', 'time_left', 'is_owner'];
+
+    protected static array $relations = ['user' => User::class, 'challenge' => Challenge::class];
+
+    private ?User $user = null;
+
+    private ?int $userId = null;
+
+    private ?Challenge $challenge = null;
+
+    private ?int $challengeId = null;
+
+    private int $currentRound = 0;
+
+    private ?int $timeLeft = null;
+
+    private bool $isOwner = false;
+
+    public function setUser(User $user): void
+    {
+        $this->user = $user;
+    }
+
+    public function setUserId(int $userId): void
+    {
+        $this->userId = $userId;
+    }
+
+    public function setChallenge(Challenge $challenge): void
+    {
+        $this->challenge = $challenge;
+    }
+
+    public function setChallengeId(int $challengeId): void
+    {
+        $this->challengeId = $challengeId;
+    }
+
+    public function setCurrentRound(int $currentRound): void
+    {
+        $this->currentRound = $currentRound;
+    }
+
+    public function setTimeLeft(?int $timeLeft): void
+    {
+        if (isset($timeLeft)) {
+            $this->timeLeft = max(0, $timeLeft);
+        }
+    }
+
+    public function setIsOwner(bool $isOwner): void
+    {
+        $this->isOwner = $isOwner;
+    }
+
+    public function getUser(): ?User
+    {
+        return $this->user;
+    }
+
+    public function getUserId(): ?int
+    {
+        return $this->userId;
+    }
+
+    public function getChallenge(): ?Challenge
+    {
+        return $this->challenge;
+    }
+
+    public function getChallengeId(): ?int
+    {
+        return $this->challengeId;
+    }
+
+    public function getCurrentRound(): int
+    {
+        return $this->currentRound;
+    }
+
+    public function getTimeLeft(): ?int
+    {
+        return $this->timeLeft;
+    }
+
+    public function getIsOwner(): bool
+    {
+        return $this->isOwner;
+    }
+}

src/PersistentData/PersistentDataManager.php

@@ -8,9 +8,9 @@ use MapGuesser\PersistentData\Model\Model;
 
 class PersistentDataManager
 {
-    public function selectFromDb(Select $select, string $type, bool $withRelations = false)
+    public function selectFromDb(Select $select, string $type, bool $useRelations = false, array $withRelations = [])
     {
-        $select = $this->createSelect($select, $type, $withRelations);
+        $select = $this->createSelect($select, $type, $useRelations, $withRelations);
 
         $data = $select->execute()->fetch(IResultSet::FETCH_ASSOC);
 
@@ -19,50 +19,75 @@ class PersistentDataManager
         }
 
         $model = new $type();
-        $this->fillWithData($data, $model);
+        $this->fillWithData($data, $model, $withRelations);
 
         return $model;
     }
 
-    public function selectMultipleFromDb(Select $select, string $type, bool $withRelations = false): Generator
+    public function selectMultipleFromDb(Select $select, string $type, bool $useRelations = false, array $withRelations = []): Generator
     {
-        $select = $this->createSelect($select, $type, $withRelations);
+        $select = $this->createSelect($select, $type, $useRelations, $withRelations);
         $result = $select->execute();
 
         while ($data = $result->fetch(IResultSet::FETCH_ASSOC)) {
             $model = new $type();
-            $this->fillWithData($data, $model);
+            $this->fillWithData($data, $model, $withRelations);
 
             yield $model;
         }
     }
 
-    public function selectFromDbById($id, string $type, bool $withRelations = false)
+    public function selectFromDbById($id, string $type, bool $useRelations = false)
     {
         $select = new Select(\Container::$dbConnection);
         $select->whereId($id);
 
-        return $this->selectFromDb($select, $type, $withRelations);
+        return $this->selectFromDb($select, $type, $useRelations);
     }
 
-    public function fillWithData(array $data, Model $model): void
+    public function fillWithData(array &$data, Model $model, array $withRelations = [], ?string $modelKey = null): void
     {
         $relations = $model::getRelations();
-        $relationData = [];
-
-        foreach ($data as $key => $value) {
-            if ($this->extractRelationData($key, $value, $relationData, $relations)) {
-                continue;
+        if (count($withRelations)) {
+            $relations = array_intersect($relations, $withRelations);
         }
 
+        while (key($data)) {
+            $key = key($data);
+            $value = current($data);
+            $relation = key($relations);
+
+            if (strpos($key, '__') == false) {
+                $method = 'set' . str_replace('_', '', ucwords($key, '_'));
+
+                if (method_exists($model, $method) && isset($value)) {
+                    $model->$method($value);
+                }
+
+                next($data);
+            } else if (isset($modelKey) && substr($key, 0, strlen($modelKey . '__')) === $modelKey . '__') {
+                $key = substr($key, strlen($modelKey) + 2);
+
                 $method = 'set' . str_replace('_', '', ucwords($key, '_'));
 
-            if (method_exists($model, $method)) {
+                if (method_exists($model, $method) && isset($value)) {
                     $model->$method($value);
                 }
-        }
 
-        $this->setRelations($model, $relationData);
+                next($data);
+            } else if (substr($key, 0, strlen($relation . '__')) === $relation . '__') {
+                $relationType = current($relations);
+                $relationModel = new $relationType();
+                $this->fillWithData($data, $relationModel, $withRelations, $relation);
+
+                $method = 'set' . str_replace('_', '', ucwords($relation, '_'));
+                $model->$method($relationModel);
+
+                next($relations);
+            } else {
+                return;
+            }
+        }
 
         $model->saveSnapshot();
     }
@@ -128,35 +153,37 @@ class PersistentDataManager
         $model->resetSnapshot();
     }
 
-    private function createSelect(Select $select, string $type, bool $withRelations = false): Select
+    private function createSelect(Select $select, string $type, bool $useRelations = false, array $withRelations = []): Select
     {
         $table = call_user_func([$type, 'getTable']);
         $fields = call_user_func([$type, 'getFields']);
 
-        $select->from($table);
-
-        //TODO: only with some relations?
-        if ($withRelations) {
-            $relations = call_user_func([$type, 'getRelations']);
-
         $columns = [];
 
         foreach ($fields as $field) {
             $columns[] = [$table, $field];
         }
 
-            $columns = array_merge($columns, $this->getRelationColumns($relations));
+        $select->from($table);
 
-            $this->leftJoinRelations($select, $table, $relations);
+        if ($useRelations) {
+            $relations = call_user_func([$type, 'getRelations']);
+            if (count($withRelations)) {
+                $relations = array_intersect($relations, $withRelations);
+            }
+
+            $columns = array_merge($columns, $this->getRelationColumns($relations, $withRelations));
+
+            $this->leftJoinRelations($select, $table, $relations, $withRelations);
             $select->columns($columns);
         } else {
-            $select->columns($fields);
+            $select->columns($columns);
         }
 
         return $select;
     }
 
-    private function getRelationColumns(array $relations): array
+    private function getRelationColumns(array $relations, array $withRelations): array
     {
         $columns = [];
 
@@ -165,46 +192,28 @@ class PersistentDataManager
             foreach (call_user_func([$relationType, 'getFields']) as $relationField) {
                 $columns[] = [$relationTable, $relationField, $relation . '__' . $relationField];
             }
+
+            $nextOrderRelations = call_user_func([$relationType, 'getRelations']);
+            if (count($withRelations)) {
+                $nextOrderRelations = array_intersect($nextOrderRelations, $withRelations);
+            }
+            $columns = array_merge($columns, $this->getRelationColumns($nextOrderRelations, $withRelations));
         }
 
         return $columns;
     }
 
-    private function leftJoinRelations(Select $select, string $table, array $relations): void
+    private function leftJoinRelations(Select $select, string $table, array $relations, array $withRelations): void
     {
         foreach ($relations as $relation => $relationType) {
             $relationTable = call_user_func([$relationType, 'getTable']);
             $select->leftJoin($relationTable, [$relationTable, 'id'], '=', [$table, $relation . '_id']);
+
+            $nextOrderRelations = call_user_func([$relationType, 'getRelations']);
+            if (count($withRelations)) {
+                $nextOrderRelations = array_intersect($nextOrderRelations, $withRelations);
             }
-    }
-
-    private function extractRelationData(string $key, $value, array &$relationData, array $relations): bool
-    {
-        $found = false;
-
-        foreach ($relations as $relation => $relationType) {
-            if (substr($key, 0, strlen($relation . '__')) === $relation . '__') {
-                $found = true;
-                $relationData[$relation][substr($key, strlen($relation . '__'))] = $value;
-                break;
-            }
-        }
-
-        return $found;
-    }
-
-    private function setRelations(Model $model, array &$relations): void
-    {
-        foreach ($model::getRelations() as $relation => $relationType) {
-            if (isset($relations[$relation])) {
-                $object = new $relationType();
-
-                $this->fillWithData($relations[$relation], $object);
-
-                $method = 'set' . str_replace('_', '', ucwords($relation, '_'));
-
-                $model->$method($object);
-            }
+            $this->leftJoinRelations($select, $relationTable, $nextOrderRelations, $withRelations);
         }
     }
 

src/Repository/ChallengeRepository.php

@@ -0,0 +1,75 @@
+<?php namespace MapGuesser\Repository;
+
+use Generator;
+use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Challenge;
+use MapGuesser\PersistentData\Model\Place;
+use MapGuesser\PersistentData\Model\User;
+use MapGuesser\PersistentData\PersistentDataManager;
+
+class ChallengeRepository
+{
+    private PersistentDataManager $pdm;
+
+    public function __construct()
+    {
+        $this->pdm = new PersistentDataManager();
+    }
+
+    public function getById(int $challengeId): ?Challenge
+    {
+        return $this->pdm->selectFromDbById($challengeId, Challenge::class);
+    }
+
+    public function getByToken(int $token): ?Challenge
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('token', '=', $token);
+        
+        return $this->pdm->selectFromDb($select, Challenge::class);
+    }
+
+    public function getByTokenStr(string $token_str): ?Challenge
+    {
+        // validate token string
+        foreach (str_split($token_str) as $char) {
+            if (!(('0' <= $char && $char <= '9') || ('a' <= $char && $char <= 'f'))) {
+                return null;
+            }
+        }
+        // convert token to int
+        $token = hexdec($token_str);
+
+        return $this->getByToken($token);
+    }
+
+    public function getAllByParticipant(User $user): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('user_in_challenge', ['challenge', 'id'], '=', ['user_in_challenge', 'challenge_id']);
+        $select->innerJoin('users', ['users', 'id'], '=', ['user_in_challenge', 'user_id']);
+        $select->where('user_id', '=', $user->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, Challenge::class);
+    }
+
+    public function getAllByOwner(User $user): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('user_in_challenge', ['challenge', 'id'], '=', ['user_in_challenge', 'challenge_id']);
+        $select->innerJoin('users', ['users', 'id'], '=', ['user_in_challenge', 'user_id']);
+        $select->where('user_id', '=', $user->getId());
+        $select->where('is_owner', '=', true);
+
+        yield from $this->pdm->selectMultipleFromDb($select, Challenge::class);
+    }
+
+    public function getAllByPlace(Place $place): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('place_in_challenge', ['challenges', 'id'], '=', ['place_in_challenge', 'challenge_id']);
+        $select->where('place_id', '=', $place->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, Challenge::class);
+    }
+}

src/Repository/GuessRepository.php

@@ -0,0 +1,98 @@
+<?php namespace MapGuesser\Repository;
+
+use Generator;
+use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Challenge;
+use MapGuesser\PersistentData\Model\Guess;
+use MapGuesser\PersistentData\Model\User;
+use MapGuesser\PersistentData\Model\UserInChallenge;
+use MapGuesser\PersistentData\Model\Place;
+use MapGuesser\PersistentData\Model\PlaceInChallenge;
+use MapGuesser\PersistentData\PersistentDataManager;
+
+class GuessRepository
+{
+    private PersistentDataManager $pdm;
+
+    public function __construct()
+    {
+        $this->pdm = new PersistentDataManager();
+    }
+
+    public function getAllByUser(User $user): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('user_id', '=', $user->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, Guess::class);
+    }
+
+    public function getAllByUserAndChallenge(User $user, Challenge $challenge): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('place_in_challenge', ['place_in_challenge', 'id'], '=', ['guesses', 'place_in_challenge_id']);
+        $select->where('user_id', '=', $user->getId());
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, Guess::class);
+    }
+
+    public function getByUserAndPlaceInChallenge(User $user, Challenge $challenge, Place $place): ?Guess
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('place_in_challenge', ['place_in_challenge', 'id'], '=', ['guesses', 'place_in_challenge_id']);
+        $select->where('user_id', '=', $user->getId());
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->where('place_id', '=', $place->getId());
+
+        return $this->pdm->selectFromDb($select, Guess::class);
+    }
+
+    public function getAllInChallengeByUser(int $userId, Challenge $challenge): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('place_in_challenge', ['place_in_challenge', 'id'], '=', ['guesses', 'place_in_challenge_id']);
+        $select->where('user_id', '=', $userId);
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->orderBy('round');
+
+        yield from $this->pdm->selectMultipleFromDb($select, Guess::class);
+    }
+
+    public function getAllInChallenge(Challenge $challenge, array $withRelations = []): Generator
+    {
+        if (count($withRelations)) {
+            $necessaryRelations = [PlaceInChallenge::class];
+            $withRelations = array_unique(array_merge($withRelations, $necessaryRelations));
+        }
+
+        $select = new Select(\Container::$dbConnection);
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->orderBy('round');
+
+        yield from $this->pdm->selectMultipleFromDb($select, Guess::class, true, $withRelations);
+    }
+
+    public function getAllInChallengeByRound(int $round, Challenge $challenge, array $withRelations = []): Generator
+    {
+        if (count($withRelations)) {
+            $necessaryRelations = [PlaceInChallenge::class];
+            $withRelations = array_unique(array_merge($withRelations, $necessaryRelations));
+        }
+        
+        $select = new Select(\Container::$dbConnection);
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->where('round', '=', $round);
+
+        yield from $this->pdm->selectMultipleFromDb($select, Guess::class, true, $withRelations);
+    }
+
+    public function getAllByPlace(Place $place): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('place_in_challenge', ['place_in_challenge', 'id'], '=', ['guesses', 'place_in_challenge_id']);
+        $select->where('place_id', '=', $place->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, Guess::class);
+    }
+}

src/Repository/MapRepository.php

@@ -1,6 +1,9 @@
 <?php namespace MapGuesser\Repository;
 
+use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Challenge;
 use MapGuesser\PersistentData\Model\Map;
+use MapGuesser\PersistentData\Model\Place;
 use MapGuesser\PersistentData\PersistentDataManager;
 
 class MapRepository
@@ -16,4 +19,20 @@ class MapRepository
     {
         return $this->pdm->selectFromDbById($mapId, Map::class);
     }
+
+    public function getByPlace(Place $place): ?Map
+    {
+        return $this->getById($place->getMapId());
+    }
+
+    public function getByChallenge(Challenge $challenge): ?Map
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('places', ['maps', 'id'], '=', ['places', 'map_id']);
+        $select->innerJoin('place_in_challenge', ['places', 'id'], '=', ['place_in_challenge', 'place_id']);
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->limit(1);
+
+        return $this->pdm->selectFromDb($select, Map::class);
+    }
 }

src/Repository/PlaceInChallengeRepository.php

@@ -0,0 +1,54 @@
+<?php namespace MapGuesser\Repository;
+
+use Generator;
+use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Challenge;
+use MapGuesser\PersistentData\Model\Map;
+use MapGuesser\PersistentData\Model\Place;
+use MapGuesser\PersistentData\Model\PlaceInChallenge;
+use MapGuesser\PersistentData\PersistentDataManager;
+
+class PlaceInChallengeRepository
+{
+    private PersistentDataManager $pdm;
+
+    public function __construct()
+    {
+        $this->pdm = new PersistentDataManager();
+    }
+
+    public function getAllByPlace(Place $place, array $withRelations = []) : Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('place_id', '=', $place->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, PlaceInChallenge::class, true, $withRelations);
+    }
+
+    public function getAllByChallenge(Challenge $challenge) : Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, PlaceInChallenge::class);
+    }
+
+    public function getByPlaceAndChallenge(Place $place, Challenge $challenge) : ?PlaceInChallenge
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('place_id', '=', $place->getId());
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        return $this->pdm->selectFromDb($select, PlaceInChallenge::class);
+    }
+
+    public function getByRoundInChallenge(int $round, Challenge $challenge, array $withRelations = []): ?PlaceInChallenge
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->orderBy('round');
+        $select->limit(1, $round);
+
+        return $this->pdm->selectFromDb($select, PlaceInChallenge::class, true, $withRelations);
+    }
+}

src/Repository/PlaceRepository.php

@@ -2,6 +2,7 @@
 
 use Generator;
 use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Challenge;
 use MapGuesser\PersistentData\Model\Map;
 use MapGuesser\PersistentData\Model\Place;
 use MapGuesser\PersistentData\PersistentDataManager;
@@ -177,4 +178,25 @@ class PlaceRepository
         return $places;
     }
 
+    public function getByRoundInChallenge(Challenge $challenge, int $round): ?Place
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('place_in_challenge', ['places', 'id'], '=', ['place_in_challenge', 'place_id']);
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->orderBy('round');
+        $select->limit(1, $round);
+
+        return $this->pdm->selectFromDb($select, Place::class);
+    }
+
+    public function getAllInChallenge(Challenge $challenge): Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->innerJoin('place_in_challenge', ['places', 'id'], '=', ['place_in_challenge', 'place_id']);
+        $select->where('challenge_id', '=', $challenge->getId());
+        $select->orderBy('round');
+
+        yield from $this->pdm->selectMultipleFromDb($select, Place::class);
+    }
+  
 }

src/Repository/UserInChallengeRepository.php

@@ -0,0 +1,81 @@
+<?php namespace MapGuesser\Repository;
+
+use Generator;
+use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Challenge;
+use MapGuesser\PersistentData\Model\User;
+use MapGuesser\PersistentData\Model\UserInChallenge;
+use MapGuesser\PersistentData\PersistentDataManager;
+
+class UserInChallengeRepository
+{
+    private PersistentDataManager $pdm;
+
+    public function __construct()
+    {
+        $this->pdm = new PersistentDataManager();
+    }
+
+    public function getAllByUser(User $user) : Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('user_id', '=', $user->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, UserInChallenge::class);
+    }
+
+    public function getAllByChallenge(Challenge $challenge) : Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, UserInChallenge::class);
+    }
+
+    public function getAllByChallengeWithUsers(Challenge $challenge) : Generator
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        yield from $this->pdm->selectMultipleFromDb($select, UserInChallenge::class, true, [User::class]);
+    }
+
+    public function getByUserIdAndChallenge(int $userId, Challenge $challenge): ?UserInChallenge
+    {
+        $select = new Select(\Container::$dbConnection);
+        $select->where('user_id', '=', $userId);
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        return $this->pdm->selectFromDb($select, UserInChallenge::class);
+    }
+
+    public function getByUserIdAndToken(int $userId, string $token_str, array $withRelations = []): ?UserInChallenge
+    {
+        if (count($withRelations)) {
+            $necessaryRelations = [Challenge::class];
+            $withRelations = array_unique(array_merge($withRelations, $necessaryRelations));
+        }
+
+        // validate token string
+        if (!ctype_xdigit($token_str)) {
+            return null;
+        }
+        // convert token to int
+        $token = hexdec($token_str);
+
+        $select = new Select(\Container::$dbConnection);
+        $select->where('user_id', '=', $userId);
+        $select->where('token', '=', $token);
+
+        return $this->pdm->selectFromDb($select, UserInChallenge::class, true, $withRelations);
+    }
+
+    public function isUserParticipatingInChallenge(int $userId, Challenge $challenge): bool
+    {
+        $select = new Select(\Container::$dbConnection, 'user_in_challenge');
+        $select->where('user_id', '=', $userId);
+        $select->where('challenge_id', '=', $challenge->getId());
+
+        return $select->count();
+    }
+}

src/Repository/UserPlayedPlaceRepository.php

@@ -38,7 +38,7 @@ class UserPlayedPlaceRepository
         $select = new Select(\Container::$dbConnection);
         $select->where('user_id', '=', $user->getId());
 
-        yield from $this->pdm->selectMultipleFromDb($select, UserPlayedPlace::class, true);
+        yield from $this->pdm->selectMultipleFromDb($select, UserPlayedPlace::class);
     }
 
     public function getByUserIdAndPlaceId(int $userId, int $placeId) : ?UserPlayedPlace

src/Repository/UserRepository.php

@@ -3,6 +3,7 @@
 use DateTime;
 use Generator;
 use MapGuesser\Database\Query\Select;
+use MapGuesser\PersistentData\Model\Guess;
 use MapGuesser\PersistentData\Model\User;
 use MapGuesser\PersistentData\PersistentDataManager;
 
@@ -44,4 +45,9 @@ class UserRepository
 
         yield from $this->pdm->selectMultipleFromDb($select, User::class);
     }
+
+    public function getByGuess(Guess $guess): ?User
+    {
+        return $this->getById($guess->getUserId());
+    }
 }

views/game.php

@@ -12,11 +12,25 @@
     <div id="players" class="marginTop"></div>
     <button id="startMultiGameButton" class="button fullWidth marginTop green">Start game</button>
 </div>
+<div id="highscores" class="modal">
+    <h2>Highscores</h2>
+    <div>
+        <table id="highscoresTable">
+            <tr>
+                <th>Player</th>
+                <th>Score</th>
+            </tr>
+        </table>
+    </div>
+    <div class="right">
+        <button id="closeHighscoresButton" class="gray marginTop" type="button">Close</button>
+    </div>
+</div>
 @endsection
 
 @section(subheader)
     <span id="mapName" class="bold">Loading map...</span><!--
- --><span>Round <span id="currentRound" class="bold"></span></span><!--
+ --><span id="roundContainer">Round <span id="currentRound" class="bold"></span></span><!--
  --><span>Score <span id="currentScoreSum" class="bold"></span></span>
 @endsection
 
@@ -25,6 +39,7 @@
         <p id="countdownTime" class="mono bold"></p>
     </div>
     <div id="panoCover"></div>
+    <div id="panningBlockerCover"></div>
     <div id="panorama"></div>
     <div id="showGuessButtonContainer">
         <button id="showGuessButton" class="fullWidth">Show guess map</button>
@@ -41,7 +56,7 @@
             <div id="distanceInfo">
                 <p>You were <span id="distance" class="bold"></span> close.</p>
                 <p>You didn't guess in this round.</p>
-                <p class="bold">Game finished.</p>
+                <p id="summaryInfo" class="bold">Game finished.</p>
             </div>
             <div id="scoreInfo">
                 <p>You earned <span id="score" class="bold"></span> points.</p>
@@ -57,6 +72,7 @@
             <button id="continueButton" class="fullWidth">Continue</button>
             <button id="showSummaryButton" class="fullWidth">Show summary</button>
             <button id="startNewGameButton" class="fullWidth">Play this map again</button>
+            <a href="/" id="goToStart"><button class="fullWidth">Go back to the menu</button></a> 
         </div>
     </div>
     <div id="navigation" class="circleControl">
@@ -84,5 +100,6 @@
     var multiUrl = '<?= $_ENV['MULTI_WS_URL'] ?>';
     var roomId = <?= isset($roomId) ? '\'' . $roomId . '\'' : 'null' ?>;
     var mapId = <?= isset($mapId) ? '\'' . $mapId . '\'' : 'null' ?>;
+    var challengeToken = <?= isset($challengeToken) ? '\'' . $challengeToken . '\'' : 'null' ?>;
 </script>
 @endsection

views/maps.php

@@ -11,6 +11,10 @@ TODO: condition!
     <a id="singleButton" class="button fullWidth marginTop" href="" title="Single player">Single player</a>
     <p class="bold center marginTop marginBottom">OR</p>
     <button id="multiButton" class="fullWidth green" data-map-id="">Multiplayer (beta)</button>
+    <?php if ($isLoggedIn): ?>
+        <p class="bold center marginTop marginBottom">OR</p>
+        <button id="challengeButton" class="fullWidth yellow" data-map-id="" data-timer="">Challenge (gamma)</button>
+    <?php endif; ?>
     <div class="right">
         <button id="closePlayModeButton" class="gray marginTop" type="button">Close</button>
     </div>
@@ -29,6 +33,54 @@ TODO: condition!
         </div>
     </form>
 </div>
+<div id="challenge" class="modal">
+    <h2>Challenge (gamma)</h2>
+    <form id="challengeForm" class="marginTop" method="get">
+        <!--
+        <div class="inputWithButton">
+            <input type="text" name="challengeToken" placeholder="Challenge to enter" required minlength="6" maxlength="6">
+        </div>
+        <p class="bold center marginTop marginBottom">OR</p>
+        -->
+        
+        <div id="restrictions" class="marginTop marginBottom">
+            <h3>Optional restrictions</h3>
+            <div>
+                <div>
+                    <input type="checkbox" id="timerEnabled" name="timerEnabled" value="timerEnabled" />
+                    <label id="timeLimitLabel" for="timerEnabled">Time limit measured in seconds</label>
+                </div>
+                <div>
+                    <input type="range" id="timeLimit" name="timeLimit" min="10" max="1800" step="10" value="300" />
+                </div>
+                <div id="timeLimitType">
+                    <label>Time limit</label>
+                    <input type="radio" id="timeLimitTypeGame" name="timeLimitType" value="game" checked />
+                    <label for="timeLimitTypeGame">for the whole game</label>
+                    <input type="radio" id="timeLimitTypeRound" name="timeLimitType" value="round" />
+                    <label for="timeLimitTypeRound">per round</label>
+                </div>
+            </div>
+            <div>
+                <input type="checkbox" id="noMove" name="noMove" value="noMove" />
+                <label for="noMove">No movement allowed</label>
+            </div>
+            <div>
+                <input type="checkbox" id="noZoom" name="noZoom" value="noZoom" />
+                <label for="noZoom">No zoom allowed</label>
+            </div>
+            <div>
+                <input type="checkbox" id="noPan" name="noPan" value="noPan" />
+                <label for="noPan">No camera change allowed</label>
+            </div>
+            <input type="hidden" name="mapId" id="challengeMapId" />
+        </div>
+        <button id="createNewChallengeButton" type="submit" class="button fullWidth green" href="" title="Create new challenge">Create new challenge</button>
+        <div class="right">
+            <button id="closeChallengeButton" class="gray marginTop" type="button">Close</button>
+        </div>
+    </form>
+</div>
 @endsection
 
 @section(main)

web.php

@@ -62,6 +62,13 @@ Container::$routeCollection->group('multiGame', function (MapGuesser\Routing\Rou
     $routeCollection->post('multiGame.nextRound-json', '{roomId}/nextRound.json', [MapGuesser\Controller\GameFlowController::class, 'multiNextRound']);
     $routeCollection->post('multiGame.guess-json', '{roomId}/guess.json', [MapGuesser\Controller\GameFlowController::class, 'multiGuess']);
 });
+Container::$routeCollection->group('challenge', function (MapGuesser\Routing\RouteCollection $routeCollection) {
+    $routeCollection->post('challenge.create', 'create.json', [\MapGuesser\Controller\GameController::class, 'createNewChallenge']);
+    $routeCollection->get('challenge', '{challengeToken}', [MapGuesser\Controller\GameController::class, 'getChallenge']);
+    $routeCollection->post('challenge.prepare-json', '{challengeToken}/prepare.json', [MapGuesser\Controller\GameController::class, 'prepareChallenge']);
+    $routeCollection->post('challenge.initialData-json', '{challengeToken}/initialData.json', [MapGuesser\Controller\GameFlowController::class, 'challengeInitialData']);
+    $routeCollection->post('challenge.guess-json', '{challengeToken}/guess.json', [MapGuesser\Controller\GameFlowController::class, 'challengeGuess']);
+});
 Container::$routeCollection->group('admin', function (MapGuesser\Routing\RouteCollection $routeCollection) {
     $routeCollection->get('admin.mapEditor', 'mapEditor/{mapId?}', [MapGuesser\Controller\MapAdminController::class, 'getMapEditor']);
     $routeCollection->get('admin.place', 'place.json/{placeId}', [MapGuesser\Controller\MapAdminController::class, 'getPlace']);