/*jQuery Form to Form Wizard (Initial: Oct 1st, 2010)
* This notice must stay intact for usage 
* Author: Dynamic Drive at http://www.dynamicdrive.com/
* Visit http://www.dynamicdrive.com/ for full source code
*/

//Oct 21st, 2010: Script updated to v1.1, which adds basic form validation functionality, triggered each time the user goes from one page to the next, or tries to submit the form.

//jQuery.noConflict()


function formtowizard(options){
	this.setting = jQuery.extend({persistsection: false, revealfx: ['slide', 500], oninit: function () {
    }, onpagechangestart: function () {
    }}, options);
	this.currentsection = -1;
	this.init(this.setting)
}

formtowizard.prototype = {

    createfieldsets: function ($theform, arr) { //reserved function for future version (dynamically wraps form elements with a fieldset element)
        $theform.find('fieldset.sectionwrap').removeClass('sectionwrap'); //make sure no fieldsets carry 'sectionwrap' before proceeding
        var $startelement = $theform.find(':first-child'); //reference first element inside form
        for (var i = 0; i < arr.length; i++) { //loop thru "break" elements
            var $fieldsetelements = $startelement.nextUntil('#' + arr[i].breakafter + ', *[name=' + arr[i].breakafter + ']').andSelf(); //reference all elements from start element to break element (nextUntil() is jQuery 1.4 function)
            $fieldsetelements.add($fieldsetelements.next()).wrapAll('<fieldset class="sectionwrap" />'); //wrap these elements with fieldset element
            $startelement = $theform.find('fieldset.sectionwrap').eq(i).prepend('<legend class="legendStep">' + arr[i].legend + '</legend>').next(); //increment startelement to begin at the end of the just inserted fieldset element
        }
    },

    loadsection: function (rawi, bypasshooks) {
        var thiswizard = this;
        //doload Boolean checks to see whether to load next section (true if bypasshooks param is true or onpagechangestart() event handler doesn't return false)
        var doload = bypasshooks || this.setting.onpagechangestart(jQuery, this.currentsection, this.sections.$sections.eq(this.currentsection));
        doload = (doload === false) ? false : true; //unless doload is explicitly false, set to true
        if (!bypasshooks && this.setting.validate) {
            var outcome = this.validate(this.currentsection);
            if (outcome === false)
                doload = false
        }
        var i = (rawi == "prev") ? this.currentsection - 1 : (rawi == "next") ? this.currentsection + 1 : parseInt(rawi); //get index of next section to show
        i = (i < 0) ? this.sections.count - 1 : (i > this.sections.count - 1) ? 0 : i; //make sure i doesn't exceed min/max limit
        if (i < this.sections.count && doload) { //if next section to show isn't the same as the current section shown
            this.$thesteps.eq(this.currentsection).addClass('disabledstep').end().eq(i).removeClass('disabledstep'); //dull current "step" text then highlight next "step" text
            if (this.setting.revealfx[0] == "slide") {
                this.sections.$sections.css("visibility", "visible");
                this.sections.$outerwrapper.stop().animate({height: this.sections.$sections.eq(i).outerHeight()}, this.setting.revealfx[1]); //animate fieldset wrapper's height to accomodate next section's height
                this.sections.$innerwrapper.stop().animate({left: -i * this.maxfieldsetwidth}, this.setting.revealfx[1], function () { //slide next section into view
                    thiswizard.sections.$sections.each(function (thissec) {
                        if (thissec != i) //hide fieldset sections currently not in veiw, so tabbing doesn't go to elements within them (and mess up layout)
                            thiswizard.sections.$sections.eq(thissec).css("visibility", "hidden")
                    })
                })
            }
            else if (this.setting.revealfx[0] == "fade") { //if fx is "fade"
                this.sections.$sections.eq(this.currentsection).hide().end().eq(i).fadeIn(this.setting.revealfx[1], function () {
                    if (document.all && this.style && this.style.removeAttribute)
                        this.style.removeAttribute('filter'); //fix IE clearType problem
                })
            }
            else {
                this.sections.$sections.eq(this.currentsection).hide().end().eq(i).show()
            }
            this.paginatediv.$status.text("Page " + (i + 1) + " of " + this.sections.count); //update current page status text
            this.paginatediv.$navlinks.css('visibility', 'visible');
            if (i == 0) //hide "prev" link
                this.paginatediv.$navlinks.eq(0).css('visibility', 'hidden');
            else if (i == this.sections.count - 1) //hide "next" link
                this.paginatediv.$navlinks.eq(1).css('visibility', 'hidden');
            if (this.setting.persistsection) //enable persistence?
                formtowizard.routines.setCookie(this.setting.formid + "_persist", i);
            this.currentsection = i;
            if (i === 0) {
                setTimeout(function () {
                    $('#nameToSearch').focus();
                }, 250);
            }
        }
    },

    addvalidatefields: function () {
        var $ = jQuery, setting = this.setting, theform = this.$theform.get(0), validatefields = [];
        var validatefields = setting.validate; //array of form element ids to validate
        for (var i = 0; i < validatefields.length; i++) {
            var el = theform.elements[validatefields[i]]; //reference form element
            if (el) { //if element is defined
                var $section = $(el).parents('fieldset.sectionwrap:eq(0)'); //find fieldset.sectionwrap this form element belongs to
                if ($section.length == 1) { //if element is within a fieldset.sectionwrap element
                    $section.data('elements').push(el); //cache this element inside corresponding section
                }
            }
        }
    },

    validate: function (section) {
        var elements = this.sections.$sections.eq(section).data('elements'); //reference elements within this section that should be validated
        var validated = true, invalidtext = ["Please fill out the following fields:\n"];

        function invalidate(el) {
            validated = false;
            invalidtext.push("- " + (el.id || el.name))
        }

        for (var i = 0; i < elements.length; i++) {
            if (/(text)/.test(elements[i].type) && elements[i].value == "") { //text and textarea elements
                invalidate(elements[i])
            }
            else if (/(select)/.test(elements[i].type) && (elements[i].selectedIndex == -1 || elements[i].options[elements[i].selectedIndex].text == "")) { //select elements
                invalidate(elements[i])
            }
            else if (elements[i].type == undefined && elements[i].length > 0) { //radio and checkbox elements
                var onechecked = false;
                for (var r = 0; r < elements[i].length; r++) {
                    if (elements[i][r].checked == true) {
                        onechecked = true;
                        break
                    }
                }
                if (!onechecked) {
                    invalidate(elements[i][0])
                }
            }
        }
        if (!validated)
            alert(invalidtext.join('\n'));
        return validated
    },


    init: function (setting) {
        var thiswizard = this;
        jQuery(function ($) { //on document.ready
            var $theform = $('#' + setting.formid);
            if ($theform.length == 0) //if form with specified ID doesn't exist, try name attribute instead
                $theform = $('form[name=' + setting.formid + ']');
            if (setting.manualfieldsets && setting.manualfieldsets.length > 0)
                thiswizard.createfieldsets($theform, setting.manualfieldsets);
            var $stepsguide = $('<div class="stepsguide" />'); //create Steps Container to house the "steps" text
            var $sections = $theform.find('fieldset.sectionwrap').hide(); //find all fieldset elements within form and hide them initially
            if (setting.revealfx[0] == "slide") { //create outer DIV that will house all the fieldset.sectionwrap elements
                $sectionswrapper = $('<div style="position:relative;overflow:hidden;"></div>').insertBefore($sections.eq(0)); //add DIV above the first fieldset.sectionwrap element
                $sectionswrapper_inner = $('<div style="position:absolute;left:0;top:0;"></div>'); //create inner DIV of $sectionswrapper that will scroll to reveal a fieldset element
            }
            var maxfieldsetwidth = $sections.eq(0).outerWidth(); //variable to get width of widest fieldset.sectionwrap
            $sections.slice(1).each(function (i) { //loop through $sections (starting from 2nd one)
                maxfieldsetwidth = Math.max($(this).outerWidth(), maxfieldsetwidth)
            });
            maxfieldsetwidth += 2; //add 2px to final width to reveal fieldset border (if not removed via CSS)
            thiswizard.maxfieldsetwidth = maxfieldsetwidth;
            $sections.each(function (i) { //loop through $sections again
                var $section = $(this);
                if (setting.revealfx[0] == "slide") {
                    $section.data('page', i).css({position: 'absolute', top: 0, left: maxfieldsetwidth * i}).appendTo($sectionswrapper_inner); //set fieldset position to "absolute" and move it to inside sectionswrapper_inner DIV
                }
                $section.data('elements', []); //empty array to contain elements within this section that should be validated for data (applicable only if validate option is defined)
                //create each "step" DIV and add it to main Steps Container:
                var $thestep = $('<div class="step disabledstep" />').data('section', i).html('Step ' + (i + 1) + '<div class="smalltext">' + $section.find('legend:eq(0)').text() + '<p></p></div>').appendTo($stepsguide);
                $thestep.click(function () { //assign behavior to each step div
                    thiswizard.loadsection($(this).data('section'))
                })
            });
            if (setting.revealfx[0] == "slide") {
                $sectionswrapper.width(maxfieldsetwidth); //set fieldset wrapper to width of widest fieldset
                $sectionswrapper.append($sectionswrapper_inner); //add $sectionswrapper_inner as a child of $sectionswrapper
            }
            $theform.prepend($stepsguide); //add $thesteps div to the beginning of the form
            //$stepsguide.insertBefore($sectionswrapper) //add Steps Container before sectionswrapper container
            var $thesteps = $stepsguide.find('div.step');
            //create pagination DIV and add it to end of form:
            var $paginatediv = $('<div class="formpaginate" style="overflow:hidden;"><span class="prev" style="float:left">Prev</span> <span class="status">Step 1 of </span> <span class="next" style="float:right">Next</span></div>');
            $theform.append($paginatediv);
            thiswizard.$theform = $theform;
            if (setting.revealfx[0] == "slide") {
                thiswizard.sections = {$outerwrapper: $sectionswrapper, $innerwrapper: $sectionswrapper_inner, $sections: $sections, count: $sections.length}; //remember various parts of section container
                thiswizard.sections.$sections.show()
            }
            else {
                thiswizard.sections = {$sections: $sections, count: $sections.length}; //remember various parts of section container
            }
            thiswizard.$thesteps = $thesteps; //remember this ref
            thiswizard.paginatediv = {$main: $paginatediv, $navlinks: $paginatediv.find('span.prev, span.next'), $status: $paginatediv.find('span.status')}; //remember various parts of pagination DIV
            thiswizard.paginatediv.$main.click(function (e) { //assign behavior to pagination buttons
                if (/(prev)|(next)/.test(e.target.className))
                    thiswizard.loadsection(e.target.className)
            });
            var i = (setting.persistsection) ? formtowizard.routines.getCookie(setting.formid + "_persist") : 0;
            thiswizard.loadsection(i || 0, true); //show the first section
            thiswizard.setting.oninit($, i, $sections.eq(i)); //call oninit event handler
            if (setting.validate) { //if validate array defined
                thiswizard.addvalidatefields(); //seek out and cache form elements that should be validated
                thiswizard.$theform.submit(function () {
                    var returnval = true;
                    for (var i = 0; i < thiswizard.sections.count; i++) {
                        if (!thiswizard.validate(i)) {
                            thiswizard.loadsection(i, true);
                            returnval = false;
                            break
                        }
                    }
                    return returnval; //allow or disallow form submission
                })
            }
        })
    }
};

formtowizard.routines = {

    getCookie: function (Name) {
        var re = new RegExp(Name + "=[^;]+", "i"); //construct RE to search for target name/value pair
        if (document.cookie.match(re)) //if cookie found
            return document.cookie.match(re)[0].split("=")[1]; //return its value
        return null
    },

    setCookie: function (name, value) {
        document.cookie = name + "=" + value + ";path=/"
    }
};