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Updated DD4TModelBuilder to support arbitrary Multimedia links. This … #16

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Updated DD4TModelBuilder to support arbitrary Multimedia links. This … #16

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108 changes: 44 additions & 64 deletions web-application/Sdl.Web.DD4T/Mapping/DD4TModelBuilder.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -72,7 +72,7 @@ protected virtual object CreateEntity(object sourceEntity, Type type, List<objec
mapData.TargetEntitiesByPrefix = GetEntityDataFromType(type);
mapData.Content = component.Fields;
mapData.Meta = component.MetadataFields;
mapData.TargetType = type;
mapData.TargetType = ProcessType(type,component);
mapData.SourceEntity = component;
var model = CreateModelFromMapData(mapData);
if (model is IEntity)
Expand All @@ -93,6 +93,31 @@ protected virtual object CreateEntity(object sourceEntity, Type type, List<objec
return null;
}

protected virtual Type ProcessType(Type type, IComponent source)
{
//Extension point for specific type processing
//For example, here we can ensure a model with a
//Generic MediaItem link is populated with a specific
//subtype (Image, YoutubeVideo, Download) model
if (source.Multimedia!=null && type==typeof(MediaItem))
{
string schemaTitle = source.Schema.Title;
if (type.IsAssignableFrom(typeof(Image)) && schemaTitle.ToLower().Contains("image"))
{
return typeof(Image);
}
if (type.IsAssignableFrom(typeof(Download)) && schemaTitle.ToLower().Contains("download"))
{
return typeof(Download);
}
if (type.IsAssignableFrom(typeof(YouTubeVideo)) && schemaTitle.ToLower().Contains("youtube"))
{
return typeof(YouTubeVideo);
}
}
return type;
}

protected virtual object CreateModelFromMapData(MappingData mapData)
{
var model = Activator.CreateInstance(mapData.TargetType);
Expand Down Expand Up @@ -122,7 +147,7 @@ protected virtual object CreateModelFromMapData(MappingData mapData)
{
if (propertyType == typeof(MediaItem) && mapData.SourceEntity.Multimedia != null)
{
pi.SetValue(model, GetMultiMediaLinks(new List<IComponent> { mapData.SourceEntity }, propertyType, multival));
pi.SetValue(model, GetMultiComponentLinks(new List<IComponent> { mapData.SourceEntity }, propertyType, multival));
processed = true;
}
else if (propertyType == typeof(Link) || propertyType == typeof(String))
Expand Down Expand Up @@ -263,7 +288,7 @@ private object GetFieldValues(IField field, Type propertyType, bool multival, Ma
case (FieldType.Number):
return GetNumbers(field, propertyType, multival);
case (FieldType.MultiMediaLink):
return GetMultiMediaLinks(field, propertyType, multival);
return GetMultiComponentLinks(field, propertyType, multival);
case (FieldType.ComponentLink):
return GetMultiComponentLinks(field, propertyType, multival);
case (FieldType.Embedded):
Expand Down Expand Up @@ -354,50 +379,6 @@ private static object GetNumbers(IField field, Type modelType, bool multival)
return null;
}

private static object GetMultiMediaLinks(IField field, Type modelType, bool multival)
{
return GetMultiMediaLinks(field.LinkedComponentValues, modelType, multival);
}

private static object GetMultiMediaLinks(IEnumerable<IComponent> items, Type modelType, bool multival)
{
var components = items as IList<IComponent> ?? items.ToList();
if (components.Any())
{
// TODO find better way to determine image or video
string schemaTitle = components.First().Schema.Title;
if (modelType.IsAssignableFrom(typeof(YouTubeVideo)) && schemaTitle.ToLower().Contains("youtube"))
{
if (multival)
{
return GetYouTubeVideos(components);
}

return GetYouTubeVideos(components)[0];
}
if (modelType.IsAssignableFrom(typeof(Download)) && schemaTitle.ToLower().Contains("download"))
{
if (multival)
{
return GetDownloads(components);
}

return GetDownloads(components)[0];
}
if (modelType.IsAssignableFrom(typeof(Image)))
{
if (multival)
{
return GetImages(components);
}

return GetImages(components)[0];
}
// TODO handle other types
}
return null;
}

private object GetMultiKeywords(IField field, Type linkedItemType, bool multival)
{
return GetMultiKeywords(field.Keywords, linkedItemType, multival);
Expand Down Expand Up @@ -501,7 +482,22 @@ private object GetMultiComponentLinks(IEnumerable<IComponent> items, Type linked
//TODO is reflection the only way to do this?
MethodInfo method = GetType().GetMethod("GetCompLink" + (multival ? "s" : String.Empty), BindingFlags.NonPublic | BindingFlags.Instance);
method = method.MakeGenericMethod(new[] { linkedItemType });
return method.Invoke(this, new object[] { items, linkedItemType });
return method.Invoke(this, new object[] { items });
}

private List<T> GetCompLinks<T>(IEnumerable<IComponent> components)
{
List<T> list = new List<T>();
foreach (var comp in components)
{
list.Add((T)Create(comp, typeof(T)));
}
return list;
}

private T GetCompLink<T>(IEnumerable<IComponent> components)
{
return GetCompLinks<T>(components)[0];
}

private object GetMultiEmbedded(IField field, Type propertyType, bool multival, MappingData mapData)
Expand Down Expand Up @@ -557,22 +553,6 @@ object GetStrings(IField field, Type modelType, bool multival)
return null;
}

private static List<Image> GetImages(IEnumerable<IComponent> components)
{
return components.Select(c => new Image { Url = c.Multimedia.Url, FileName = c.Multimedia.FileName, FileSize = c.Multimedia.Size, MimeType = c.Multimedia.MimeType}).ToList();
}

private static List<YouTubeVideo> GetYouTubeVideos(IEnumerable<IComponent> components)
{
return components.Select(c => new YouTubeVideo { Url = c.Multimedia.Url, FileSize = c.Multimedia.Size, MimeType = c.Multimedia.MimeType, YouTubeId = c.MetadataFields["youTubeId"].Value }).ToList();
}

private static List<Download> GetDownloads(IEnumerable<IComponent> components)
{
//todo this contains hardcoded metadata while we would expect this to semantiaclly ma
return components.Select(c => new Download { Url = c.Multimedia.Url, FileName = c.Multimedia.FileName, FileSize = c.Multimedia.Size, MimeType = c.Multimedia.MimeType, Description = (c.MetadataFields.ContainsKey("description") ? c.MetadataFields["description"].Value : null) }).ToList();
}

protected Dictionary<string, string> GetAllFieldsAsDictionary(IComponent component)
{
Dictionary<string, string> values = new Dictionary<string, string>();
Expand Down