Member access for grid content

membergrid.cshtml

@inherits UmbracoViewPage<dynamic>
@using Umbraco.Web.Templates
@using Newtonsoft.Json.Linq

@* this is my custom grid rendering 
  Note the function IsAreaVisible at line 69, which takes the UmbracoHelper (for getting the current member) and the area (for reading the visibility-setting)

  In the rendering, IsAreaVisible is used at line 50
*@

@*
    Razor helpers located at the bottom of this file
*@

@if (Model != null && Model.sections != null)
{
    var oneColumn = ((System.Collections.ICollection)Model.sections).Count == 1;

    if (oneColumn)
    {
        foreach (var section in Model.sections)
        {
            <div id="content">
                @foreach (var row in section.rows)
                {
                    @renderRow(row, true);
                }
            </div>
        }
    }
    else
    {
        foreach (var s in Model.sections)
        {
            foreach (var row in s.rows)
            {
                @renderRow(row, false);
            }
        }
    }
}

@helper renderRow(dynamic row, bool singleColumn)
{
    <div @RenderElementAttributes(row) class="row">

        @foreach (var area in row.areas)
        {

            if (IsAreaVisible(Umbraco, area) || UmbracoContext.Current.InPreviewMode)
            { 
                <div @RenderElementAttributes(area) class="col [email protected]">
                @foreach (var control in area.controls)
                {
                    if (control != null && control.editor != null && control.editor.view != null)
                    {
                        <text>@Html.Partial("grid/editors/base", (object)control)</text>
                    }
                }
                </div>
            }
        }
    </div>
}

@functions {
    

    public static bool IsAreaVisible(UmbracoHelper umbraco, dynamic area)
    {
        var isVisibleToMembersValue = "";

        JObject cfg = area.config;
        if (cfg != null)
        {
            foreach (JProperty property in cfg.Properties())
            {
                if (property.Name == "isVisibleToMembers")
                {
                    isVisibleToMembersValue = property.Value.ToString();
                }
            }
        }


        var isLoggedIn = umbraco.MemberIsLoggedOn();

        var isVisibleToMembers = (isVisibleToMembersValue == "") || (isVisibleToMembersValue == "Show for all users") || (isLoggedIn && isVisibleToMembersValue == "Show only for logged in members") || (!isLoggedIn && isVisibleToMembersValue == "Show only for not logged in members");

        return isVisibleToUsers;


    }

    public static MvcHtmlString RenderElementAttributes(dynamic contentItem)
    {
        var attrs = new List<string>();
        JObject cfg = contentItem.config;

        if (cfg != null)
        {
            foreach (JProperty property in cfg.Properties())
            {
                attrs.Add(property.Name + "=\"" + property.Value.ToString() + "\"");
            }
        }

        JObject style = contentItem.styles;

        if (style != null)
        {
            var cssVals = new List<string>();
            foreach (JProperty property in style.Properties())
                cssVals.Add(property.Name + ":" + property.Value.ToString() + ";");

            if (cssVals.Any())
                attrs.Add("style=\"" + string.Join(" ", cssVals) + "\"");
        }

        return new MvcHtmlString(string.Join(" ", attrs));
    }
}

settings.json

// add this setting to your grid datatype
  {
    "label": "Visibility for members",
    "key": "isVisibleToMembers",
    "view": "radiobuttonlist",
    "applyTo": "cell", // could also be "row"
    "prevalues": [
      "Show for all users",
      "Show only for logged in members",
      "Show only for not logged in members"
    ]
  }