Added PropertyExtractResolver.

Sources/Umbraco.Extensions/Events/UmbracoEvents.cs

@@ -21,6 +21,8 @@ namespace Umbraco.Extensions.Events
     using Umbraco.Core.Publishing;
     using Umbraco.Core.Services;
     using Umbraco.Extensions.ContentFinders;
+    using Umbraco.Extensions.Extract;
+    using Umbraco.Extensions.Models.Custom;
     using Umbraco.Extensions.UrlProviders;
     using Umbraco.Web;
     using Umbraco.Web.Cache;
@@ -79,6 +81,21 @@ protected override void ApplicationStarted(UmbracoApplicationBase umbracoApplica
             externalIndexer.GatheringNodeData += this.ExternalIndexerGatheringContentData;
         }
 
+        /// <summary>
+        /// The application initialized event
+        /// </summary>
+        /// <param name="umbracoApplication">
+        /// The umbraco application.
+        /// </param>
+        /// <param name="applicationContext">
+        /// The application context.
+        /// </param>
+        protected override void ApplicationInitialized(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
+        {
+            // Resolve all property extract classes.
+            PropertyExtractResolver.Current = new PropertyExtractResolver(PluginManager.Current.ResolveTypes<PropertyExtractBase>());
+        }
+
         private void PageCacheRefresherCacheUpdated(PageCacheRefresher sender, Core.Cache.CacheRefresherEventArgs e)
         {
             // After content has been updated clear content finder cache.

Sources/Umbraco.Extensions/Extract/PropertyExtractResolver.cs

@@ -0,0 +1,46 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="PropertyExtractResolver.cs" company="Colours B.V.">
+//   © Colours B.V. 2015
+// </copyright>
+// <summary>
+//   The property extract resolver.
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace Umbraco.Extensions.Extract
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Linq;
+
+    using Umbraco.Core.ObjectResolution;
+    using Umbraco.Extensions.Models.Custom;
+
+    /// <summary>
+    /// The property extract resolver.
+    /// </summary>
+    public class PropertyExtractResolver : ManyObjectsResolverBase<PropertyExtractResolver, PropertyExtractBase>
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="PropertyExtractResolver"/> class.
+        /// </summary>
+        /// <param name="extractItems">
+        /// The extract items.
+        /// </param>
+        public PropertyExtractResolver(IEnumerable<Type> extractItems)
+            : base(extractItems, ObjectLifetimeScope.Application)
+        {
+        }
+
+        /// <summary>
+        /// Gets the property extract items.
+        /// </summary>
+        public List<PropertyExtractBase> PropertyExtractItems
+        {
+            get
+            {
+                return this.Values.ToList();
+            }
+        }
+    }
+}

Sources/Umbraco.Extensions/Models/Custom/PropertyExtractBase.cs

@@ -0,0 +1,71 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="PropertyExtractBase.cs" company="Colours B.V.">
+//   © Colours B.V. 2015
+// </copyright>
+// <summary>
+//   The property extract base.
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace Umbraco.Extensions.Models.Custom
+{
+    using System.Linq;
+    using System.Text;
+
+    using Umbraco.Core.Models;
+    using Umbraco.Web;
+
+    /// <summary>
+    /// The property extract base.
+    /// </summary>
+    public abstract class PropertyExtractBase
+    {
+        /// <summary>
+        /// Gets the allowed types.
+        /// </summary>
+        public abstract string[] AllowedTypes { get; }
+
+        /// <summary>
+        /// Checks if the extract is for this property type.
+        /// </summary>
+        /// <param name="propertyTypeAlias">
+        /// The property type alias.
+        /// </param>
+        /// <returns>
+        /// The <see cref="bool"/>.
+        /// </returns>
+        public bool IsExtractForPropertyType(string propertyTypeAlias)
+        {
+            return this.AllowedTypes.Contains(propertyTypeAlias);
+        }
+
+        /// <summary>
+        /// Converts the content into a string for Examine.
+        /// </summary>
+        /// /// 
+        /// <param name="extractedContent">
+        /// The extracted content.
+        /// </param>
+        /// <param name="content">
+        /// The content.
+        /// </param>
+        /// <param name="alias">
+        /// The alias.
+        /// </param>
+        /// <param name="language">
+        /// The language.
+        /// </param>
+        public virtual void Examine(
+            StringBuilder extractedContent, 
+            IPublishedContent content, 
+            string alias, 
+            string language = null)
+        {
+            var text = content.GetPropertyValue<string>(alias);
+            if (!string.IsNullOrEmpty(text))
+            {
+                extractedContent.Append(" " + content.GetPropertyValue<string>(alias));
+            }
+        }
+    }
+}

Sources/Umbraco.Extensions/Umbraco.Extensions.csproj

@@ -287,6 +287,7 @@
     <Compile Include="Controllers\UrlPreviewApiController.cs" />
     <Compile Include="CustomBootManager.cs" />
     <Compile Include="Events\UmbracoEvents.cs" />
+    <Compile Include="Extract\PropertyExtractResolver.cs" />
     <Compile Include="Global.cs" />
     <Compile Include="Models\Builder.cs">
       <Generator>UmbracoModelsBuilder</Generator>
@@ -297,6 +298,7 @@
       <DesignTime>True</DesignTime>
       <AutoGen>True</AutoGen>
     </Compile>
+    <Compile Include="Models\Custom\PropertyExtractBase.cs" />
     <Compile Include="Models\Image.cs" />
     <Compile Include="Models\Detached.generated.cs">
       <DependentUpon>Builder.cs</DependentUpon>