554 lines
17 KiB
JavaScript
554 lines
17 KiB
JavaScript
H5P.MemoryGame = (function (EventDispatcher, $) {
|
||
|
||
// We don't want to go smaller than 100px per card(including the required margin)
|
||
var CARD_MIN_SIZE = 100; // PX
|
||
var CARD_STD_SIZE = 116; // PX
|
||
var STD_FONT_SIZE = 16; // PX
|
||
var LIST_PADDING = 1; // EMs
|
||
var numInstances = 0;
|
||
|
||
/**
|
||
* Memory Game Constructor
|
||
*
|
||
* @class H5P.MemoryGame
|
||
* @extends H5P.EventDispatcher
|
||
* @param {Object} parameters
|
||
* @param {Number} id
|
||
*/
|
||
function MemoryGame(parameters, id) {
|
||
/** @alias H5P.MemoryGame# */
|
||
var self = this;
|
||
|
||
// Initialize event inheritance
|
||
EventDispatcher.call(self);
|
||
|
||
var flipped, timer, counter, popup, $bottom, $taskComplete, $feedback, $wrapper, maxWidth, numCols;
|
||
var cards = [];
|
||
var flipBacks = []; // Que of cards to be flipped back
|
||
var numFlipped = 0;
|
||
var removed = 0;
|
||
numInstances++;
|
||
|
||
// Add defaults
|
||
parameters = $.extend(true, {
|
||
l10n: {
|
||
cardTurns: 'Card turns',
|
||
timeSpent: 'Time spent',
|
||
feedback: 'Good work!',
|
||
tryAgain: 'Reset',
|
||
closeLabel: 'Close',
|
||
label: 'Memory Game. Find the matching cards.',
|
||
done: 'All of the cards have been found.',
|
||
cardPrefix: 'Card %num: ',
|
||
cardUnturned: 'Unturned.',
|
||
cardMatched: 'Match found.'
|
||
}
|
||
}, parameters);
|
||
|
||
/**
|
||
* Check if these two cards belongs together.
|
||
*
|
||
* @private
|
||
* @param {H5P.MemoryGame.Card} card
|
||
* @param {H5P.MemoryGame.Card} mate
|
||
* @param {H5P.MemoryGame.Card} correct
|
||
*/
|
||
var check = function (card, mate, correct) {
|
||
if (mate !== correct) {
|
||
// Incorrect, must be scheduled for flipping back
|
||
flipBacks.push(card);
|
||
flipBacks.push(mate);
|
||
|
||
// Wait for next click to flip them back…
|
||
if (numFlipped > 2) {
|
||
// or do it straight away
|
||
processFlipBacks();
|
||
}
|
||
return;
|
||
}
|
||
|
||
// Update counters
|
||
numFlipped -= 2;
|
||
removed += 2;
|
||
|
||
var isFinished = (removed === cards.length);
|
||
|
||
// Remove them from the game.
|
||
card.remove(!isFinished);
|
||
mate.remove();
|
||
|
||
var desc = card.getDescription();
|
||
if (desc !== undefined) {
|
||
// Pause timer and show desciption.
|
||
timer.pause();
|
||
var imgs = [card.getImage()];
|
||
if (card.hasTwoImages) {
|
||
imgs.push(mate.getImage());
|
||
}
|
||
popup.show(desc, imgs, cardStyles ? cardStyles.back : undefined, function (refocus) {
|
||
if (isFinished) {
|
||
// Game done
|
||
card.makeUntabbable();
|
||
finished();
|
||
}
|
||
else {
|
||
// Popup is closed, continue.
|
||
timer.play();
|
||
|
||
if (refocus) {
|
||
card.setFocus();
|
||
}
|
||
}
|
||
});
|
||
}
|
||
else if (isFinished) {
|
||
// Game done
|
||
card.makeUntabbable();
|
||
finished();
|
||
}
|
||
};
|
||
|
||
/**
|
||
* Game has finished!
|
||
* @private
|
||
*/
|
||
var finished = function () {
|
||
timer.stop();
|
||
$taskComplete.show();
|
||
$feedback.addClass('h5p-show'); // Announce
|
||
$bottom.focus();
|
||
|
||
// Create and trigger xAPI event 'completed'
|
||
var completedEvent = self.createXAPIEventTemplate('completed');
|
||
completedEvent.setScoredResult(1, 1, self, true, true);
|
||
completedEvent.data.statement.result.duration = 'PT' + (Math.round(timer.getTime() / 10) / 100) + 'S';
|
||
self.trigger(completedEvent);
|
||
|
||
if (parameters.behaviour && parameters.behaviour.allowRetry) {
|
||
// Create retry button
|
||
var retryButton = createButton('reset', parameters.l10n.tryAgain || 'Reset', function () {
|
||
// Trigger handler (action)
|
||
|
||
retryButton.classList.add('h5p-memory-transout');
|
||
setTimeout(function () {
|
||
// Remove button on nextTick to get transition effect
|
||
$wrapper[0].removeChild(retryButton);
|
||
}, 300);
|
||
|
||
resetGame();
|
||
});
|
||
retryButton.classList.add('h5p-memory-transin');
|
||
setTimeout(function () {
|
||
// Remove class on nextTick to get transition effectupd
|
||
retryButton.classList.remove('h5p-memory-transin');
|
||
}, 0);
|
||
|
||
// Same size as cards
|
||
retryButton.style.fontSize = (parseFloat($wrapper.children('ul')[0].style.fontSize) * 0.75) + 'px';
|
||
|
||
$wrapper[0].appendChild(retryButton); // Add to DOM
|
||
}
|
||
};
|
||
|
||
/**
|
||
* Shuffle the cards and restart the game!
|
||
* @private
|
||
*/
|
||
var resetGame = function () {
|
||
|
||
// Reset cards
|
||
removed = 0;
|
||
|
||
// Remove feedback
|
||
$feedback[0].classList.remove('h5p-show');
|
||
$taskComplete.hide();
|
||
|
||
// Reset timer and counter
|
||
timer.reset();
|
||
counter.reset();
|
||
|
||
// Randomize cards
|
||
H5P.shuffleArray(cards);
|
||
|
||
setTimeout(function () {
|
||
// Re-append to DOM after flipping back
|
||
for (var i = 0; i < cards.length; i++) {
|
||
cards[i].reAppend();
|
||
}
|
||
for (var j = 0; j < cards.length; j++) {
|
||
cards[j].reset();
|
||
}
|
||
|
||
// Scale new layout
|
||
$wrapper.children('ul').children('.h5p-row-break').removeClass('h5p-row-break');
|
||
maxWidth = -1;
|
||
self.trigger('resize');
|
||
cards[0].setFocus();
|
||
}, 600);
|
||
};
|
||
|
||
/**
|
||
* Game has finished!
|
||
* @private
|
||
*/
|
||
var createButton = function (name, label, action) {
|
||
var buttonElement = document.createElement('div');
|
||
buttonElement.classList.add('h5p-memory-' + name);
|
||
buttonElement.innerHTML = label;
|
||
buttonElement.setAttribute('role', 'button');
|
||
buttonElement.tabIndex = 0;
|
||
buttonElement.addEventListener('click', function () {
|
||
action.apply(buttonElement);
|
||
}, false);
|
||
buttonElement.addEventListener('keypress', function (event) {
|
||
if (event.which === 13 || event.which === 32) { // Enter or Space key
|
||
event.preventDefault();
|
||
action.apply(buttonElement);
|
||
}
|
||
}, false);
|
||
return buttonElement;
|
||
};
|
||
|
||
/**
|
||
* Adds card to card list and set up a flip listener.
|
||
*
|
||
* @private
|
||
* @param {H5P.MemoryGame.Card} card
|
||
* @param {H5P.MemoryGame.Card} mate
|
||
*/
|
||
var addCard = function (card, mate) {
|
||
card.on('flip', function () {
|
||
|
||
// Always return focus to the card last flipped
|
||
for (var i = 0; i < cards.length; i++) {
|
||
cards[i].makeUntabbable();
|
||
}
|
||
card.makeTabbable();
|
||
|
||
popup.close();
|
||
self.triggerXAPI('interacted');
|
||
// Keep track of time spent
|
||
timer.play();
|
||
|
||
// Keep track of the number of flipped cards
|
||
numFlipped++;
|
||
|
||
// Announce the card unless it's the last one and it's correct
|
||
var isMatched = (flipped === mate);
|
||
var isLast = ((removed + 2) === cards.length);
|
||
card.updateLabel(isMatched, !(isMatched && isLast));
|
||
|
||
if (flipped !== undefined) {
|
||
var matie = flipped;
|
||
// Reset the flipped card.
|
||
flipped = undefined;
|
||
|
||
setTimeout(function () {
|
||
check(card, matie, mate);
|
||
}, 800);
|
||
}
|
||
else {
|
||
if (flipBacks.length > 1) {
|
||
// Turn back any flipped cards
|
||
processFlipBacks();
|
||
}
|
||
|
||
// Keep track of the flipped card.
|
||
flipped = card;
|
||
}
|
||
|
||
// Count number of cards turned
|
||
counter.increment();
|
||
});
|
||
|
||
/**
|
||
* Create event handler for moving focus to the next or the previous
|
||
* card on the table.
|
||
*
|
||
* @private
|
||
* @param {number} direction +1/-1
|
||
* @return {function}
|
||
*/
|
||
var createCardChangeFocusHandler = function (direction) {
|
||
return function () {
|
||
// Locate next card
|
||
for (var i = 0; i < cards.length; i++) {
|
||
if (cards[i] === card) {
|
||
// Found current card
|
||
|
||
var nextCard, fails = 0;
|
||
do {
|
||
fails++;
|
||
nextCard = cards[i + (direction * fails)];
|
||
if (!nextCard) {
|
||
return; // No more cards
|
||
}
|
||
}
|
||
while (nextCard.isRemoved());
|
||
|
||
card.makeUntabbable();
|
||
nextCard.setFocus();
|
||
|
||
return;
|
||
}
|
||
}
|
||
};
|
||
};
|
||
|
||
// Register handlers for moving focus to next and previous card
|
||
card.on('next', createCardChangeFocusHandler(1));
|
||
card.on('prev', createCardChangeFocusHandler(-1));
|
||
|
||
/**
|
||
* Create event handler for moving focus to the first or the last card
|
||
* on the table.
|
||
*
|
||
* @private
|
||
* @param {number} direction +1/-1
|
||
* @return {function}
|
||
*/
|
||
var createEndCardFocusHandler = function (direction) {
|
||
return function () {
|
||
var focusSet = false;
|
||
for (var i = 0; i < cards.length; i++) {
|
||
var j = (direction === -1 ? cards.length - (i + 1) : i);
|
||
if (!focusSet && !cards[j].isRemoved()) {
|
||
cards[j].setFocus();
|
||
focusSet = true;
|
||
}
|
||
else if (cards[j] === card) {
|
||
card.makeUntabbable();
|
||
}
|
||
}
|
||
};
|
||
};
|
||
|
||
// Register handlers for moving focus to first and last card
|
||
card.on('first', createEndCardFocusHandler(1));
|
||
card.on('last', createEndCardFocusHandler(-1));
|
||
|
||
cards.push(card);
|
||
};
|
||
|
||
/**
|
||
* Will flip back two and two cards
|
||
*/
|
||
var processFlipBacks = function () {
|
||
flipBacks[0].flipBack();
|
||
flipBacks[1].flipBack();
|
||
flipBacks.splice(0, 2);
|
||
numFlipped -= 2;
|
||
};
|
||
|
||
/**
|
||
* @private
|
||
*/
|
||
var getCardsToUse = function () {
|
||
var numCardsToUse = (parameters.behaviour && parameters.behaviour.numCardsToUse ? parseInt(parameters.behaviour.numCardsToUse) : 0);
|
||
if (numCardsToUse <= 2 || numCardsToUse >= parameters.cards.length) {
|
||
// Use all cards
|
||
return parameters.cards;
|
||
}
|
||
|
||
// Pick random cards from pool
|
||
var cardsToUse = [];
|
||
var pickedCardsMap = {};
|
||
|
||
var numPicket = 0;
|
||
while (numPicket < numCardsToUse) {
|
||
var pickIndex = Math.floor(Math.random() * parameters.cards.length);
|
||
if (pickedCardsMap[pickIndex]) {
|
||
continue; // Already picked, try again!
|
||
}
|
||
|
||
cardsToUse.push(parameters.cards[pickIndex]);
|
||
pickedCardsMap[pickIndex] = true;
|
||
numPicket++;
|
||
}
|
||
|
||
return cardsToUse;
|
||
};
|
||
|
||
var cardStyles, invertShades;
|
||
if (parameters.lookNFeel) {
|
||
// If the contrast between the chosen color and white is too low we invert the shades to create good contrast
|
||
invertShades = (parameters.lookNFeel.themeColor &&
|
||
getContrast(parameters.lookNFeel.themeColor) < 1.7 ? -1 : 1);
|
||
var backImage = (parameters.lookNFeel.cardBack ? H5P.getPath(parameters.lookNFeel.cardBack.path, id) : null);
|
||
cardStyles = MemoryGame.Card.determineStyles(parameters.lookNFeel.themeColor, invertShades, backImage);
|
||
}
|
||
|
||
// Initialize cards.
|
||
var cardsToUse = getCardsToUse();
|
||
for (var i = 0; i < cardsToUse.length; i++) {
|
||
var cardParams = cardsToUse[i];
|
||
if (MemoryGame.Card.isValid(cardParams)) {
|
||
// Create first card
|
||
var cardTwo, cardOne = new MemoryGame.Card(cardParams.image, id, cardParams.imageAlt, parameters.l10n, cardParams.description, cardStyles, cardParams.audio);
|
||
|
||
if (MemoryGame.Card.hasTwoImages(cardParams)) {
|
||
// Use matching image for card two
|
||
cardTwo = new MemoryGame.Card(cardParams.match, id, cardParams.matchAlt, parameters.l10n, cardParams.description, cardStyles, cardParams.matchAudio);
|
||
cardOne.hasTwoImages = cardTwo.hasTwoImages = true;
|
||
}
|
||
else {
|
||
// Add two cards with the same image
|
||
cardTwo = new MemoryGame.Card(cardParams.image, id, cardParams.imageAlt, parameters.l10n, cardParams.description, cardStyles, cardParams.audio);
|
||
}
|
||
|
||
// Add cards to card list for shuffeling
|
||
addCard(cardOne, cardTwo);
|
||
addCard(cardTwo, cardOne);
|
||
}
|
||
}
|
||
H5P.shuffleArray(cards);
|
||
|
||
/**
|
||
* Attach this game's html to the given container.
|
||
*
|
||
* @param {H5P.jQuery} $container
|
||
*/
|
||
self.attach = function ($container) {
|
||
this.triggerXAPI('attempted');
|
||
// TODO: Only create on first attach!
|
||
$wrapper = $container.addClass('h5p-memory-game').html('');
|
||
if (invertShades === -1) {
|
||
$container.addClass('h5p-invert-shades');
|
||
}
|
||
|
||
// Add cards to list
|
||
var $list = $('<ul/>', {
|
||
role: 'application',
|
||
'aria-labelledby': 'h5p-intro-' + numInstances
|
||
});
|
||
for (var i = 0; i < cards.length; i++) {
|
||
cards[i].appendTo($list);
|
||
}
|
||
cards[0].makeTabbable();
|
||
|
||
if ($list.children().length) {
|
||
$('<div/>', {
|
||
id: 'h5p-intro-' + numInstances,
|
||
'class': 'h5p-memory-hidden-read',
|
||
html: parameters.l10n.label,
|
||
appendTo: $container
|
||
});
|
||
$list.appendTo($container);
|
||
|
||
$bottom = $('<div/>', {
|
||
'class': 'h5p-programatically-focusable',
|
||
tabindex: '-1',
|
||
appendTo: $container
|
||
});
|
||
$taskComplete = $('<div/>', {
|
||
'class': 'h5p-memory-complete h5p-memory-hidden-read',
|
||
html: parameters.l10n.done,
|
||
appendTo: $bottom
|
||
});
|
||
|
||
$feedback = $('<div class="h5p-feedback">' + parameters.l10n.feedback + '</div>').appendTo($bottom);
|
||
|
||
// Add status bar
|
||
var $status = $('<dl class="h5p-status">' +
|
||
'<dt>' + parameters.l10n.timeSpent + ':</dt>' +
|
||
'<dd class="h5p-time-spent"><time role="timer" datetime="PT0M0S">0:00</time><span class="h5p-memory-hidden-read">.</span></dd>' +
|
||
'<dt>' + parameters.l10n.cardTurns + ':</dt>' +
|
||
'<dd class="h5p-card-turns">0<span class="h5p-memory-hidden-read">.</span></dd>' +
|
||
'</dl>').appendTo($bottom);
|
||
|
||
timer = new MemoryGame.Timer($status.find('time')[0]);
|
||
counter = new MemoryGame.Counter($status.find('.h5p-card-turns'));
|
||
popup = new MemoryGame.Popup($container, parameters.l10n);
|
||
|
||
$container.click(function () {
|
||
popup.close();
|
||
});
|
||
}
|
||
};
|
||
|
||
/**
|
||
* Will try to scale the game so that it fits within its container.
|
||
* Puts the cards into a grid layout to make it as square as possible –
|
||
* which improves the playability on multiple devices.
|
||
*
|
||
* @private
|
||
*/
|
||
var scaleGameSize = function () {
|
||
|
||
// Check how much space we have available
|
||
var $list = $wrapper.children('ul');
|
||
|
||
var newMaxWidth = parseFloat(window.getComputedStyle($list[0]).width);
|
||
if (maxWidth === newMaxWidth) {
|
||
return; // Same size, no need to recalculate
|
||
}
|
||
else {
|
||
maxWidth = newMaxWidth;
|
||
}
|
||
|
||
// Get the card holders
|
||
var $elements = $list.children();
|
||
if ($elements.length < 4) {
|
||
return; // No need to proceed
|
||
}
|
||
|
||
// Determine the optimal number of columns
|
||
var newNumCols = Math.ceil(Math.sqrt($elements.length));
|
||
|
||
// Do not exceed the max number of columns
|
||
var maxCols = Math.floor(maxWidth / CARD_MIN_SIZE);
|
||
if (newNumCols > maxCols) {
|
||
newNumCols = maxCols;
|
||
}
|
||
|
||
if (numCols !== newNumCols) {
|
||
// We need to change layout
|
||
numCols = newNumCols;
|
||
|
||
// Calculate new column size in percentage and round it down (we don't
|
||
// want things sticking out…)
|
||
var colSize = Math.floor((100 / numCols) * 10000) / 10000;
|
||
$elements.css('width', colSize + '%').each(function (i, e) {
|
||
if (i === numCols) {
|
||
$(e).addClass('h5p-row-break');
|
||
}
|
||
});
|
||
}
|
||
|
||
// Calculate how much one percentage of the standard/default size is
|
||
var onePercentage = ((CARD_STD_SIZE * numCols) + STD_FONT_SIZE) / 100;
|
||
var paddingSize = (STD_FONT_SIZE * LIST_PADDING) / onePercentage;
|
||
var cardSize = (100 - paddingSize) / numCols;
|
||
var fontSize = (((maxWidth * (cardSize / 100)) * STD_FONT_SIZE) / CARD_STD_SIZE);
|
||
|
||
// We use font size to evenly scale all parts of the cards.
|
||
$list.css('font-size', fontSize + 'px');
|
||
popup.setSize(fontSize);
|
||
// due to rounding errors in browsers the margins may vary a bit…
|
||
};
|
||
|
||
if (parameters.behaviour && parameters.behaviour.useGrid && cardsToUse.length) {
|
||
self.on('resize', scaleGameSize);
|
||
}
|
||
}
|
||
|
||
// Extends the event dispatcher
|
||
MemoryGame.prototype = Object.create(EventDispatcher.prototype);
|
||
MemoryGame.prototype.constructor = MemoryGame;
|
||
|
||
/**
|
||
* Determine color contrast level compared to white(#fff)
|
||
*
|
||
* @private
|
||
* @param {string} color hex code
|
||
* @return {number} From 1 to Infinity.
|
||
*/
|
||
var getContrast = function (color) {
|
||
return 255 / ((parseInt(color.substr(1, 2), 16) * 299 +
|
||
parseInt(color.substr(3, 2), 16) * 587 +
|
||
parseInt(color.substr(5, 2), 16) * 144) / 1000);
|
||
};
|
||
|
||
return MemoryGame;
|
||
})(H5P.EventDispatcher, H5P.jQuery);
|