/**
 * General javascript code useful to various Horde pages.
 *
 * $Horde: horde/js/horde.js,v 1.37 2009-09-30 18:19:17 slusarz Exp $
 *
 * See the enclosed file COPYING for license information (LGPL). If you
 * did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
 */

/* Helper methods for setting/getting element text without mucking
 * around with multiple TextNodes. */
Element.addMethods({
    setText: function(element, text)
    {
        var t = 0;
        $A(element.childNodes).each(function(node) {
            if (node.nodeType == 3) {
                if (t++) {
                    Element.remove(node);
                } else {
                    node.nodeValue = text;
                }
            }
        });

        if (!t) {
            $(element).insert(text);
        }

        return element;
    },

    getText: function(element, recursive)
    {
        var text = '';
        $A(element.childNodes).each(function(node) {
            if (node.nodeType == 3) {
                text += node.nodeValue;
            } else if (recursive && node.hasChildNodes()) {
                text += $(node).getText(true);
            }
        });
        return text;
    }
});

/* Create some utility functions. */
Object.extend(Array.prototype, {
    // Need our own diff() function because prototypejs's without() function
    // does not handle array input.
    diff: function(values)
    {
        return this.select(function(value) {
            return !values.include(value);
        });
    },
    numericSort: function()
    {
        return this.collect(Number).sort(function(a,b) {
            return (a > b) ? 1 : ((a < b) ? -1 : 0);
        });
    }
});

Object.extend(String.prototype, {
    // We define our own version of evalScripts() to make sure that all
    // scripts are running in the same scope and that all functions are
    // defined in the global scope. This is not the case when using
    // prototype's evalScripts().
    evalScripts: function()
    {
        var re = /function\s+([^\s(]+)/g;
        this.extractScripts().each(function(s) {
            var func;
            eval(s);
            while (func = re.exec(s)) {
                window[func[1]] = eval(func[1]);
            }
        });
    }
});

Object.extend(Date.prototype, {
    /**
     * Moves a date to the end of the corresponding week.
     *
     * @return Date  The same Date object, now pointing to the end of the week.
     */
    moveToEndOfWeek: function(weekStart)
    {
        var weekEndDay = weekStart + 6;
        if (weekEndDay > 6) {
            weekEndDay -= 7;
        }
        if (this.getDay() != weekEndDay) {
            this.moveToDayOfWeek(weekEndDay, 1);
        }
        return this;
    },

    /**
     * Moves a date to the begin of the corresponding week.
     *
     * @return Date  The same Date object, now pointing to the begin of the
     *               week.
     */
    moveToBeginOfWeek: function(weekStart)
    {
        if (this.getDay() != weekStart) {
            this.moveToDayOfWeek(weekStart, -1);
        }
        return this;
    },

    /**
     * Format date and time to be passed around as a short url parameter,
     * cache id, etc.
     *
     * @return string  Date and time.
     */
    dateString: function()
    {
        return this.toString('yyyyMMdd');
    }

});