/src/Orchard.Web/Modules/Orchard.Projections/Drivers/QueryPartDriver.cs

using System;
using System.Linq;
using System.Xml.Linq;
using Orchard.ContentManagement;
using Orchard.ContentManagement.Drivers;
using Orchard.ContentManagement.Handlers;
using Orchard.Projections.Models;

namespace Orchard.Projections.Drivers {
    
    public class QueryPartDriver : ContentPartDriver<QueryPart> {
        protected override DriverResult Editor(QueryPart part, IUpdateModel updater, dynamic shapeHelper) {
            if(updater == null) {
                return null;
            }

            return null;
        }

        protected override void Exporting(QueryPart part, ExportContentContext context) {

            var element = context.Element(part.PartDefinition.Name);

            element.Add(
                new XElement("FilterGroups",
                    part.FilterGroups.Select( filterGroup => 
                        new XElement("FilterGroup",
                            filterGroup.Filters.Select( filter =>
                                new XElement("Filter", 
                                    new XAttribute("Category", filter.Category ?? ""),
                                    new XAttribute("Description", filter.Description ?? ""),
                                    new XAttribute("Position", filter.Position),
                                    new XAttribute("State", filter.State ?? ""),
                                    new XAttribute("Type", filter.Type ?? "")
                                )
                            )
                        )
                    )
                ),
                new XElement("SortCriteria",
                    part.SortCriteria.Select( sortCriterion => 
                    new XElement("SortCriterion",
                                    new XAttribute("Category", sortCriterion.Category ?? ""),
                                    new XAttribute("Description", sortCriterion.Description ?? ""),
                                    new XAttribute("Position", sortCriterion.Position),
                                    new XAttribute("State", sortCriterion.State ?? ""),
                                    new XAttribute("Type", sortCriterion.Type ?? "")
                        )
                    )
                ),
                new XElement("Layouts",
                    part.Layouts.Select( layout => 
                        new XElement("Layout",
                            // Attributes
                            new XAttribute("Category", layout.Category ?? ""),
                            new XAttribute("Description", layout.Description ?? ""),
                            new XAttribute("State", layout.State),
                            new XAttribute("Display", layout.Display),
                            new XAttribute("DisplayType", layout.DisplayType ?? ""),
                            new XAttribute("Type", layout.Type ?? ""),
                            
                            // Properties
                            new XElement("Properties", layout.Properties.Select(GetPropertyXml)),

                            // Group
                            new XElement("Group", GetPropertyXml(layout.GroupProperty))
                        )
                    )
                )
            );
        }

        protected override void Importing(QueryPart part, ImportContentContext context) {
            var queryElement = context.Data.Element(part.PartDefinition.Name);

            part.Record.FilterGroups.Clear();
            foreach(var item in queryElement.Element("FilterGroups").Elements("FilterGroup").Select(filterGroup =>
                new FilterGroupRecord {
                    Filters = filterGroup.Elements("Filter").Select( filter =>
                        new FilterRecord {
                            Category = filter.Attribute("Category").Value,
                            Description = filter.Attribute("Description").Value,
                            Position = Convert.ToInt32(filter.Attribute("Position").Value),
                            State = filter.Attribute("State").Value,
                            Type = filter.Attribute("Type").Value
                        }).ToList()
                })) {
                part.Record.FilterGroups.Add(item);
            }

            part.Record.SortCriteria.Clear();
            foreach(var item in queryElement.Element("SortCriteria").Elements("SortCriterion").Select(sortCriterion =>
                new SortCriterionRecord {
                    Category = sortCriterion.Attribute("Category").Value,
                    Description = sortCriterion.Attribute("Description").Value,
                    Position = Convert.ToInt32(sortCriterion.Attribute("Position").Value),
                    State = sortCriterion.Attribute("State").Value,
                    Type = sortCriterion.Attribute("Type").Value

                })) {
                part.Record.SortCriteria.Add(item);
            }

            part.Record.Layouts.Clear();
            foreach(var item in queryElement.Element("Layouts").Elements("Layout").Select(layout =>
                new LayoutRecord {
                    
                    Category = layout.Attribute("Category").Value,
                    Description = layout.Attribute("Description").Value,
                    Display = int.Parse(layout.Attribute("Display").Value),
                    DisplayType = layout.Attribute("DisplayType").Value,
                    State = layout.Attribute("State").Value,
                    Type = layout.Attribute("Type").Value,
                    Properties = layout.Element("Properties").Elements("Property").Select(GetProperty).ToList(),
                    GroupProperty = GetProperty(layout.Element("Group").Element("Property"))
                })) {
                part.Record.Layouts.Add(item);
            }

        }

        private XElement GetPropertyXml(PropertyRecord property) {
            if(property == null) {
                return null;
            }

            return new XElement("Property",
                new XAttribute("Category", property.Category ?? ""),
                new XAttribute("Description", property.Description ?? ""),
                new XAttribute("Position", property.Position),
                new XAttribute("State", property.State ?? ""),
                new XAttribute("Type", property.Type ?? ""),

                new XAttribute("AddEllipsis", property.AddEllipsis),
                new XAttribute("CreateLabel", property.CreateLabel),
                new XAttribute("CustomLabelCss", property.CustomLabelCss ?? ""),
                new XAttribute("CustomLabelTag", property.CustomLabelTag ?? ""),
                new XAttribute("CustomPropertyCss", property.CustomPropertyCss ?? ""),
                new XAttribute("CustomPropertyTag", property.CustomPropertyTag ?? ""),
                new XAttribute("CustomWrapperCss", property.CustomWrapperCss ?? ""),
                new XAttribute("CustomWrapperTag", property.CustomWrapperTag ?? ""),
                new XAttribute("CustomizeLabelHtml", property.CustomizeLabelHtml),
                new XAttribute("CustomizePropertyHtml", property.CustomizePropertyHtml),
                new XAttribute("CustomizeWrapperHtml", property.CustomizeWrapperHtml),
                new XAttribute("ExcludeFromDisplay", property.ExcludeFromDisplay),
                new XAttribute("HideEmpty", property.HideEmpty),
                new XAttribute("Label", property.Label ?? ""),
                new XAttribute("LinkToContent", property.LinkToContent),
                new XAttribute("MaxLength", property.MaxLength),
                new XAttribute("NoResultText", property.NoResultText ?? ""),
                new XAttribute("PreserveLines", property.PreserveLines),
                new XAttribute("RewriteOutput", property.RewriteOutput),
                new XAttribute("RewriteText", property.RewriteText ?? ""),
                new XAttribute("StripHtmlTags", property.StripHtmlTags),
                new XAttribute("TrimLength", property.TrimLength),
                new XAttribute("TrimOnWordBoundary", property.TrimOnWordBoundary),
                new XAttribute("TrimWhiteSpace", property.TrimWhiteSpace),
                new XAttribute("ZeroIsEmpty", property.ZeroIsEmpty)
            );
        }

        private PropertyRecord GetProperty(XElement property) {
            if(property == null) {
                return null;
            }

            return new PropertyRecord {
                AddEllipsis = Convert.ToBoolean(property.Attribute("AddEllipsis").Value),
                Category = property.Attribute("Category").Value,
                CreateLabel = Convert.ToBoolean(property.Attribute("CreateLabel").Value),
                CustomLabelCss = property.Attribute("CustomLabelCss").Value,
                Description = property.Attribute("Description").Value,
                Type = property.Attribute("Type").Value,
                CustomLabelTag = property.Attribute("CustomLabelTag").Value,
                CustomPropertyCss = property.Attribute("CustomPropertyCss").Value,
                CustomPropertyTag = property.Attribute("CustomPropertyTag").Value,
                CustomWrapperCss = property.Attribute("CustomWrapperCss").Value,
                CustomWrapperTag = property.Attribute("CustomWrapperTag").Value,
                CustomizeLabelHtml = Convert.ToBoolean(property.Attribute("CustomizeLabelHtml").Value),
                CustomizePropertyHtml = Convert.ToBoolean(property.Attribute("CustomizePropertyHtml").Value),
                CustomizeWrapperHtml = Convert.ToBoolean(property.Attribute("CustomizeWrapperHtml").Value),
                ExcludeFromDisplay = Convert.ToBoolean(property.Attribute("ExcludeFromDisplay").Value),
                HideEmpty = Convert.ToBoolean(property.Attribute("HideEmpty").Value),
                Label = property.Attribute("Label").Value,
                LinkToContent = Convert.ToBoolean(property.Attribute("LinkToContent").Value),
                MaxLength = Convert.ToInt32(property.Attribute("MaxLength").Value),
                NoResultText = property.Attribute("NoResultText").Value,
                Position = Convert.ToInt32(property.Attribute("Position").Value),
                PreserveLines = Convert.ToBoolean(property.Attribute("PreserveLines").Value),
                RewriteOutput = Convert.ToBoolean(property.Attribute("RewriteOutput").Value),
                RewriteText = property.Attribute("RewriteText").Value,
                State = property.Attribute("State").Value,
                StripHtmlTags = Convert.ToBoolean(property.Attribute("StripHtmlTags").Value),
                TrimLength = Convert.ToBoolean(property.Attribute("TrimLength").Value),
                TrimOnWordBoundary = Convert.ToBoolean(property.Attribute("TrimOnWordBoundary").Value),
                TrimWhiteSpace = Convert.ToBoolean(property.Attribute("TrimWhiteSpace").Value),
                ZeroIsEmpty = Convert.ToBoolean(property.Attribute("ZeroIsEmpty").Value),
            };
        }
    }
}