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@cwleonard /hooked.js
Last active Aug 29, 2015

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Used with the hook.io microservice framework to calculate the date of Easter for a given year.
module['exports'] = function easter(hook) {
var year = hook.params.year;
hook.debug("i am going to calculate the date of Easter for " + year);
// using the "Meeus/Jones/Butcher" algorithm
var a = year % 19;
var b = Math.floor(year/100);
var c = year % 100;
var d = Math.floor(b/4);
var e = b % 4;
var f = Math.floor((b + 8) / 25);
var g = Math.floor((b - f + 1) / 3);
var h = ((19*a) + b - d - g + 15) % 30;
var i = Math.floor (c/4);
var k = c % 4;
var L = (32 + (2*e) + (2*i) - h - k) % 7;
var m = Math.floor((a + (11*h) + (22*L)) / 451);
var month = Math.floor((h + L - (7*m) + 114) / 31);
var day = ((h + L - (7*m) + 114) % 31) + 1;
hook.debug("month is " + month);
hook.debug("day is " + day);
var monthNames = [ "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December" ];
hook.res.end("Easter is " + monthNames[month-1] + " " + day + " in " + year + "\n");
};
module['exports'].schema = {
"year": {
"type": "number"
}
};
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