Adds interfaces for IContent, IMedia, IContentBase.

Adds interfaces for IContentTypeBase, IContentTypeComposition, IContentType and IMediaType.
This includes the inheritance structure for Content and Media, as well as ContentType and MediaType which is basically the same except for Templates and Compositions.

src/Umbraco.Core/Models/IContentBase.cs

@@ -0,0 +1,105 @@
+using System.Collections.Generic;
+using Umbraco.Core.Models.EntityBase;
+
+namespace Umbraco.Core.Models
+{
+    /// <summary>
+    /// Defines the base for a Content object with properties that
+    /// are shared between Content and Media.
+    /// </summary>
+    public interface IContentBase : IAggregateRoot
+    {
+        /// <summary>
+        /// Gets or Sets the Id of the Parent for the Content
+        /// </summary>
+        int ParentId { get; set; }
+
+        /// <summary>
+        /// Gets or Sets the Name of the Content
+        /// </summary>
+        string Name { get; set; }
+
+        /// <summary>
+        /// Gets the Url name of the Content
+        /// </summary>
+        string UrlName { get; }
+
+        /// <summary>
+        /// Gets or Sets the Sort Order of the Content
+        /// </summary>
+        int SortOrder { get; set; }
+
+        /// <summary>
+        /// Gets or Sets the Level of the Content
+        /// </summary>
+        int Level { get; set; }
+
+        /// <summary>
+        /// Gets or Sets the Path of the Content
+        /// </summary>
+        string Path { get; set; }
+
+        /// <summary>
+        /// Id of the user who created the Content
+        /// </summary>
+        int UserId { get; set; }
+
+        /// <summary>
+        /// Boolean indicating whether this Content is Trashed or not.
+        /// If Content is Trashed it will be located in the Recyclebin.
+        /// </summary>
+        bool Trashed { get; }
+        
+        /// <summary>
+        /// Integer Id of the default ContentType
+        /// </summary>
+        int ContentTypeId { get; }
+
+        /// <summary>
+        /// List of properties, which make up all the data available for this Content object
+        /// </summary>
+        /// <remarks>Properties are loaded as part of the Content object graph</remarks>
+        PropertyCollection Properties { get; set; }
+
+        /// <summary>
+        /// List of PropertyGroups available on this Content object
+        /// </summary>
+        /// <remarks>PropertyGroups are kind of lazy loaded as part of the object graph</remarks>
+        IEnumerable<PropertyGroup> PropertyGroups { get; }
+
+        /// <summary>
+        /// List of PropertyTypes available on this Content object
+        /// </summary>
+        /// <remarks>PropertyTypes are kind of lazy loaded as part of the object graph</remarks>
+        IEnumerable<PropertyType> PropertyTypes { get; }
+
+        /// <summary>
+        /// Indicates whether the content object has a property with the supplied alias
+        /// </summary>
+        /// <param name="propertyTypeAlias">Alias of the PropertyType</param>
+        /// <returns>True if Property with given alias exists, otherwise False</returns>
+        bool HasProperty(string propertyTypeAlias);
+
+        /// <summary>
+        /// Gets the value of a Property
+        /// </summary>
+        /// <param name="propertyTypeAlias">Alias of the PropertyType</param>
+        /// <returns><see cref="Property"/> Value as an <see cref="object"/></returns>
+        object GetValue(string propertyTypeAlias);
+
+        /// <summary>
+        /// Gets the value of a Property
+        /// </summary>
+        /// <typeparam name="TPassType">Type of the value to return</typeparam>
+        /// <param name="propertyTypeAlias">Alias of the PropertyType</param>
+        /// <returns><see cref="Property"/> Value as a <see cref="TPassType"/></returns>
+        TPassType GetValue<TPassType>(string propertyTypeAlias);
+
+        /// <summary>
+        /// Sets the value of a Property
+        /// </summary>
+        /// <param name="propertyTypeAlias">Alias of the PropertyType</param>
+        /// <param name="value">Value to set for the Property</param>
+        void SetValue(string propertyTypeAlias, object value);
+    }
+}