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import { blockType, StorageKey } from './const';
const hiddenProperty = (() => { // document[hiddenProperty] 可以判断页面是否失焦
let names = [
'hidden',
'webkitHidden',
'mozHidden',
'msHidden',
];
names = names.filter((e) => (e in document));
return names.length > 0 ? names[0] : false;
})();
const visibilityChangeEvent = (() => {
if (!hiddenProperty) {
return false;
}
return hiddenProperty.replace(/hidden/i, 'visibilitychange'); // 如果属性有前缀, 相应的事件也有前缀
})();
const isFocus = () => {
if (!hiddenProperty) { // 如果不存在该特性, 认为一直聚焦
return true;
}
return !document[hiddenProperty];
};
const unit = {
getNextType() { // 随机获取下一个方块类型
const len = blockType.length;
return blockType[Math.floor(Math.random() * len)];
},
want(next, matrix) { // 方块是否能移到到指定位置
const xy = next.xy;
const shape = next.shape;
const horizontal = shape.get(0).size;
return shape.every((m, k1) => (
m.every((n, k2) => {
if (xy[1] < 0) { // left
return false;
}
if (xy[1] + horizontal > 10) { // right
return false;
}
if (xy[0] + k1 < 0) { // top
return true;
}
if (xy[0] + k1 >= 20) { // bottom
return false;
}
if (n) {
if (matrix.get(xy[0] + k1).get(xy[1] + k2)) {
return false;
}
return true;
}
return true;
})
));
},
isClear(matrix) { // 是否达到消除状态
const clearLines = [];
matrix.forEach((m, k) => {
if (m.every(n => !!n)) {
clearLines.push(k);
}
});
if (clearLines.length === 0) {
return false;
}
return clearLines;
},
isOver(matrix) { // 游戏是否结束, 第一行落下方块为依据
return matrix.get(0).some(n => !!n);
},
subscribeRecord(store) { // 将状态记录到 localStorage
store.subscribe(() => {
let data = store.getState().toJS();
if (data.lock) { // 当状态为锁定, 不记录
return;
}
data = JSON.stringify(data);
data = encodeURIComponent(data);
if (window.btoa) {
data = btoa(data);
}
localStorage.setItem(StorageKey, data);
});
},
isMobile() { // 判断是否为移动端
const ua = navigator.userAgent;
const android = /Android (\d+\.\d+)/.test(ua);
const iphone = ua.indexOf('iPhone') > -1;
const ipod = ua.indexOf('iPod') > -1;
const ipad = ua.indexOf('iPad') > -1;
const nokiaN = ua.indexOf('NokiaN') > -1;
return android || iphone || ipod || ipad || nokiaN;
},
visibilityChangeEvent,
isFocus,
};
module.exports = unit;
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