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import QtQuick 2.2

/*
    CalendarHeaderModel contains a list of the days of a week,
    according to a \l locale. The \l locale affects which day of the week
    is first in the model.

    The only role provided by the model is \c dayOfWeek, which is one of the
    following JavaScript values:

    \list
    \li \c Locale.Sunday
    \li \c Locale.Monday
    \li \c Locale.Tuesday
    \li \c Locale.Wednesday
    \li \c Locale.Thursday
    \li \c Locale.Friday
    \li \c Locale.Saturday
    \endlist
 */

ListModel {
    id: root

    /*
        The locale that this model should be based on.
        This affects which day of the week is first in the model.
    */
    property var locale

    ListElement {
        dayOfWeek: Locale.Sunday
    }
    ListElement {
        dayOfWeek: Locale.Monday
    }
    ListElement {
        dayOfWeek: Locale.Tuesday
    }
    ListElement {
        dayOfWeek: Locale.Wednesday
    }
    ListElement {
        dayOfWeek: Locale.Thursday
    }
    ListElement {
        dayOfWeek: Locale.Friday
    }
    ListElement {
        dayOfWeek: Locale.Saturday
    }

    Component.onCompleted: updateFirstDayOfWeek()
    onLocaleChanged: updateFirstDayOfWeek()

    function updateFirstDayOfWeek() {
        var daysOfWeek = [Locale.Sunday, Locale.Monday, Locale.Tuesday,
            Locale.Wednesday, Locale.Thursday, Locale.Friday, Locale.Saturday];
        var firstDayOfWeek = root.locale.firstDayOfWeek;

        var shifted = daysOfWeek.splice(firstDayOfWeek, daysOfWeek.length - firstDayOfWeek);
        daysOfWeek = shifted.concat(daysOfWeek)

        if (firstDayOfWeek !== root.get(0).dayOfWeek) {
            for (var i = 0; i < daysOfWeek.length; ++i) {
                root.setProperty(i, "dayOfWeek", daysOfWeek[i]);
            }
        }
    }
}