addEventToGoogleCalendar.js

javascript: (function () {

    var event,
            selection = (function () {
                if (window.getSelection) {
                    return window.getSelection().toString();
                } else if (document.getSelection) {
                    return document.getSelection();
                } else {
                    return document.selection.createRange().text;
                }
            })();

    var title = (selection ? getTitle(selection) : '');

    function getTitle(selection) {
        var titleMatches = selection.match(/[a-z ]+/gi);
        if (titleMatches) {
            for (var i = 0; i < titleMatches.length; i++) {
                if (titleMatches[i].trim().length == 0) {
                    titleMatches.splice(i, 1);
                    i--;
                }
            }
            return titleMatches.join(' - ');
        }
    }

    function dateStringToDate(dateString) {
        var dateArray = dateString.match(/[0-9]{1,4}/g);

        var date = new Date();
        date.setDate(dateArray[0]);
        date.setMonth(dateArray[1] - 1);
        if (dateArray[2]) {
            date.setFullYear(dateArray[2].length == 4 ? dateArray[2] : '20' + dateArray[2]);
        } else {
            date.setYear(new Date().getFullYear());
        }
        date.setHours(5);
        return date;
    }

    function getDateString(string) {
        var matches = string.match(/([0-9]{1,2}[\-\.\/]){1,2}[0-9]{1,4}/);
        return matches ? matches[0] : false;
    }

    function dateToDateGoogle(date) {
        return date.toISOString().split("T")[0].replace(/\-/g, '');
    }

    try {

        var selection = selection
                .match(/(([0-9]{1,2}[\-\.\/]){1,2}[0-9]{1,4}){0,1}\-{0,1}(([0-9]{1,2}[\-\.\/]){1,2}[0-9]{1,4})/)[0].split('-');

        var startDate,
                startDateString = getDateString(selection[0]),
                endDate = (selection[1] ? dateStringToDate(getDateString(selection[1]))
                        : dateStringToDate(getDateString(selection[0])));

        startDate = (startDateString ? dateStringToDate(startDateString)
                : new Date(endDate.getFullYear(), endDate.getMonth(), selection[0].match(/[0-9]{1,2}/)[0], 5, 5));

        /* poprawka dziwoty googlowej */
        endDate.setDate(endDate.getDate() + 1);

        event = "text=" + title + "&dates=" + dateToDateGoogle(startDate) + "/" + dateToDateGoogle(endDate);

    } catch (e) {
        event = "ctext=" + title;
    }

    void(
        /*open a new window with this information in the Google Calendar event creation page.*/
            window.open(
                    encodeURI('http://www.google.com/calendar/event?'
                            + event + '&action=TEMPLATE&pprop=HowCreated:QUICKADD'
                    ), 'addwindow', 'status=no,toolbar=no,width=520,height=470,resizable=yes'));
})();