MediaWiki:SeasonCalculator.js

$(document).ready(function() {
    $("#calculatorDiv").empty();
    $("#calculatorDiv").append('<input type="number" id="calculator"></input>');   
    $('#calculator').keyup(calculateSeason);
    $('#calculator').change(calculateSeason);		    
}); 

function calculateSeason() {
    if ($(this).val().match(/^\d+$/)) {
        var season = 'Unknown';
        var sleepTimes = parseInt($(this).val());
        sleepTimes = (sleepTimes + 1) % 554400;
        var seasonNumber = Math.floor((sleepTimes + 4)/ 3) % 4;
        switch (seasonNumber){
            case 0:
                season = 'Winter';
                break;
            case 1:
                season = 'Spring';
                break;
            case 2:
                season = 'Summer';
                break;
            case 3:
                season = 'Fall';
                break;                        
        }
        var limite = false;
        var i = 1;
        while (!limite) {
            sleepTimes++;
            seasonNumberTest = (Math.floor((sleepTimes + 4)/ 3)) % 4;
            if (seasonNumberTest == seasonNumber) i++;
            else limite = true;
        }
        $("#results").empty();
        $("#results").append('The season in your next dream will be <b>' + season + '</b>. ');
        if (i == 1) {
            $("#results").append('This is the last day of the season.');
        }
        else {
            $("#results").append('This season will last for ' + i + ' more days.');            
        }
    }
    else {
        $(this).val('');
        $("#results").empty();
        $("#results").append('Type a valid positive integer on the input field.');         
    }
}