/******************************************************************************
 * 
 * jQuery functions for the plone.app.discussion comment viewlet and form.
 * 
 ******************************************************************************/

(function ($) {
	// This unnamed function allows us to use $ inside of a block of code 
	// without permanently overwriting $.
	// http://docs.jquery.com/Using_jQuery_with_Other_Libraries


    /**************************************************************************
     * Create a reply-to-comment form right beneath the form that is passed to
     * the function. We do this by copying the regular comment form and 
     * adding a hidden in_reply_to field to the form.
     **************************************************************************/
    $.createReplyForm = function (comment_div) {
        
        var comment_id = comment_div.attr("id");
    
        var reply_button = comment_div.find(".reply-to-comment-button");
    
        /* Clone the reply div at the end of the page template that contains
         * the regular comment form.
         */
        var reply_div = $("#commenting").clone(true);
    
        /* Remove the ReCaptcha JS code before appending the form. If not
         * removed, this causes problems
         */
        reply_div.find("#formfield-form-widgets-captcha")
                 .find("script")
                 .remove();
    
        /* Insert the cloned comment form right after the reply button of the
         * current comment.
         */
        reply_div.appendTo(comment_div).css("display", "none");
    
        /* Remove id="reply" attribute, since we use it to uniquely
           the main reply form. */
        reply_div.removeAttr("id");
    
        /* Hide the reply button (only hide, because we may want to show it
         * again if the user hits the cancel button).
         */
        $(reply_button).css("display", "none");
    
        /* Fetch the reply form inside the reply div */
        var reply_form = reply_div.find("form");
    
        /* Populate the hidden 'in_reply_to' field with the correct comment 
           id */
        reply_form.find("input[name='form.widgets.in_reply_to']")
                  .val(comment_id);
    
        /* Add a remove-reply-to-comment Javascript function to remove the 
           form */
        var cancel_reply_button = reply_div.find(".cancelreplytocomment");
        cancel_reply_button.attr("id", comment_id);
    
        /* Show the cancel buttons. */
        reply_form.find("input[name='form.buttons.cancel']")
                  .css("display", "inline");
    
        /* Show the reply layer with a slide down effect */
        reply_div.slideDown("slow");
    
        /* Show the cancel button in the reply-to-comment form */
        cancel_reply_button.css("display", "inline");
    }


    /**************************************************************************
     * Remove all error messages and field values from the form that is passed
     * to the function.
     **************************************************************************/
    $.clearForm = function (form_div) {
        form_div.find(".error").removeClass("error");
        form_div.find(".fieldErrorBox").remove();
        form_div.find("input[type='text']").attr("value", "");
        form_div.find("textarea").attr("value", "");
        /* XXX: Clean all additional form extender fields. */
    }

    //#JSCOVERAGE_IF 0

    /**************************************************************************
     * Window Load Function: Executes when complete page is fully loaded, 
     * including all frames,
     **************************************************************************/  
    $(window).load(function () {
		
	    /**********************************************************************
	     * If the user has hit the reply button of a reply-to-comment form 
	     * (form was submitted with a value for the "in_reply_to" field in the 
	     * request), create a reply-to-comment form right under this comment.
	     **********************************************************************/
	    var post_comment_div = $("#commenting");
	    var in_reply_to_field = 
	        post_comment_div.find("input[name='form.widgets.in_reply_to']");
	    if (in_reply_to_field.val() !== "") {
	        var current_reply_id = "#" + in_reply_to_field.val();
	        var current_reply_to_div = $(".discussion").find(current_reply_id);
	        $.createReplyForm(current_reply_to_div);
	        $.clearForm(post_comment_div);
	    }
	    	
	    
		/**********************************************************************
	     * If the user hits the "reply" button of an existing comment, create a 
	     * reply form right beneath this comment.
	     **********************************************************************/
	    $(".reply-to-comment-button").bind("click", function (e) {
	        var comment_div = $(this).parents().filter(".comment");
	        $.createReplyForm(comment_div);
	        $.clearForm(comment_div);
	    });
	
	
	    /**********************************************************************
	     * If the user hits the "clear" button of an open reply-to-comment form,
	     * remove the form and show the "reply" button again.
	     **********************************************************************/
	    $("#form-buttons-cancel").bind("click", function (e) {
	        e.preventDefault();
	        var reply_to_comment_button = $(this).
			                                  parents().
									          filter(".comment").
										      find(".reply-to-comment-button");
	
	        /* Find the reply-to-comment form and hide and remove it again. */
	        reply_to_comment_form = $(this).parents().filter(".reply");
	        reply_to_comment_form.slideUp("slow", function () { 
	            $(this).remove(); 
	        });
	
	        /* Show the reply-to-comment button again. */
	        reply_to_comment_button.css("display", "inline");
	
	    });
	


	    /**********************************************************************
	     * By default, hide the reply and the cancel button for the regular add
	     * comment form.
	     **********************************************************************/
	    $(".reply").find("input[name='form.buttons.reply']")
	                .css("display", "none");
	    $(".reply").find("input[name='form.buttons.cancel']")
	                .css("display", "none");
	
	
	    /**********************************************************************
	     * By default, show the reply button only when Javascript is enabled.
	     * Otherwise hide it, since the reply functions only work with JS 
	     * enabled.
	     **********************************************************************/
	    $(".reply-to-comment-button").css("display" , "inline");
	
	});

    //#JSCOVERAGE_ENDIF

}(jQuery));