74 lines
3.2 KiB
C#
74 lines
3.2 KiB
C#
using System;
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using System.Linq;
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using System.Linq.Expressions;
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using Umbraco.Core.Models.PublishedContent;
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using Umbraco.Web.Composing;
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namespace Umbraco.ModelsBuilder.Embedded
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{
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/// <summary>
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/// This is called from within the generated model classes
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/// </summary>
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/// <remarks>
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/// DO NOT REMOVE - although there are not code references this is used directly by the generated models.
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/// </remarks>
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public static class PublishedModelUtility
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{
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// looks safer but probably useless... ppl should not call these methods directly
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// and if they do... they have to take care about not doing stupid things
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//public static PublishedPropertyType GetModelPropertyType2<T>(Expression<Func<T, object>> selector)
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// where T : PublishedContentModel
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//{
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// var type = typeof (T);
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// var s1 = type.GetField("ModelTypeAlias", BindingFlags.Public | BindingFlags.Static);
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// var alias = (s1.IsLiteral && s1.IsInitOnly && s1.FieldType == typeof(string)) ? (string)s1.GetValue(null) : null;
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// var s2 = type.GetField("ModelItemType", BindingFlags.Public | BindingFlags.Static);
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// var itemType = (s2.IsLiteral && s2.IsInitOnly && s2.FieldType == typeof(PublishedItemType)) ? (PublishedItemType)s2.GetValue(null) : 0;
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// var contentType = PublishedContentType.Get(itemType, alias);
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// // etc...
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//}
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public static IPublishedContentType GetModelContentType(PublishedItemType itemType, string alias)
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{
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var facade = Current.UmbracoContext.PublishedSnapshot; // fixme inject!
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switch (itemType)
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{
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case PublishedItemType.Content:
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return facade.Content.GetContentType(alias);
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case PublishedItemType.Media:
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return facade.Media.GetContentType(alias);
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case PublishedItemType.Member:
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return facade.Members.GetContentType(alias);
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default:
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throw new ArgumentOutOfRangeException(nameof(itemType));
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}
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}
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public static IPublishedPropertyType GetModelPropertyType<TModel, TValue>(IPublishedContentType contentType, Expression<Func<TModel, TValue>> selector)
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//where TModel : PublishedContentModel // fixme PublishedContentModel _or_ PublishedElementModel
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{
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// fixme therefore, missing a check on TModel here
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var expr = selector.Body as MemberExpression;
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if (expr == null)
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throw new ArgumentException("Not a property expression.", nameof(selector));
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// there _is_ a risk that contentType and T do not match
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// see note above : accepted risk...
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var attr = expr.Member
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.GetCustomAttributes(typeof(ImplementPropertyTypeAttribute), false)
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.OfType<ImplementPropertyTypeAttribute>()
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.SingleOrDefault();
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if (string.IsNullOrWhiteSpace(attr?.Alias))
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throw new InvalidOperationException($"Could not figure out property alias for property \"{expr.Member.Name}\".");
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return contentType.GetPropertyType(attr.Alias);
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}
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}
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}
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