わかりました、これは素晴らしいパズルでした。本当に時間がかかりましたが、楽しかったです。
以下の完全な作業コード(jsfiddle here):
function isHoliday(/*Date*/ date) {
for(var i = 0; i < holidays.length; i++) {
if(holidays[i].getTime() == date.getTime()) {
return true;
}
}
return false;
}
function diffHours(/*Date*/ d1, /*Date*/ d2) {
var date1 = new Date(d1.getUTCFullYear()+"-"+(d1.getUTCMonth()+1)+"-"+d1.getUTCDate()+" UTC");
var date2 = new Date(d2.getUTCFullYear()+"-"+(d2.getUTCMonth()+1)+"-"+d2.getUTCDate()+" UTC");
var sum = 0;
var oneday = 24*3600*1000;
var hours, date;
// first day
if(!isHoliday(date1)) {
// decrease by a whole day first (will be added later)
sum -= 10;
// add real hours
hours = d1.getUTCHours() + d1.getUTCMinutes() / 60;
if(hours <= 6) {
sum += 10 - hours;
} else if(hours <= 20) {
sum += 4;
} else {
sum += 24 - hours;
}
}
// last day
if(!isHoliday(date2)) {
// decrease by a whole day first (will be added later)
sum -= 10;
// add real hours
hours = d2.getUTCHours() + d2.getUTCMinutes() / 60;
if(hours <= 6) {
sum += hours;
} else if(hours <= 20) {
sum += 6;
} else {
sum += hours - 14;
}
}
// whole days
while(date1 <= date2) {
if(!isHoliday(date1)) {
sum += 10;
}
// increase date by 1 day
date1.setTime(date1.getTime() + oneday);
}
return Math.floor(sum);
}
// ==============
// examples below
// --------------
// array of Dates (in UTC) to skip
var holidays = [
new Date("2012-01-04 UTC"),
];
for(var i = 0; i < holidays.length; i++) {
console.log('holiday: ', holidays[i].toUTCString());
}
a = new Date("2012-01-01 12:00 UTC");
b = new Date("2012-01-02 12:00 UTC");
c = new Date("2012-01-02 22:00 UTC");
d = new Date("2012-01-03 07:00 UTC");
e = new Date("2012-01-05 12:00 UTC");
console.log({d1: a.toUTCString(), d2: b.toUTCString(), hours: diffHours(a, b)});
console.log({d1: b.toUTCString(), d2: c.toUTCString(), hours: diffHours(b, c)});
console.log({d1: c.toUTCString(), d2: d.toUTCString(), hours: diffHours(c, d)});
console.log({d1: d.toUTCString(), d2: e.toUTCString(), hours: diffHours(d, e)});