FieldExtensions

using System;
using System.Linq;
using Orchard.ContentManagement;
using Orchard.MediaLibrary.Fields;
using Orchard.MediaLibrary.Models;

namespace Patient.Core.Extensions {
    public static class FieldExtensions {
        public static MediaPart GetDefaultMediaPart(this MediaLibraryPickerField field) {
            if (field == null) {
                return null;
            }

            return field.MediaParts != null && field.MediaParts.Any() ?
                field.MediaParts.FirstOrDefault() : null;
        }

        public static string GetDefaultMediaUrl(this MediaLibraryPickerField field) {
            var mediaPart = field.GetDefaultMediaPart();

            try {
                return mediaPart != null ? mediaPart.MediaUrl : string.Empty;
            }
            catch (Exception) { }

            return string.Empty;
        }

        public static string GetDefaultMediaUrlByFieldName(this IContent content, string fieldName) {
            return GetDefaultMediaUrlByPartAndFieldName(content, null, fieldName);
        }

        public static string GetDefaultMediaUrlByPartAndFieldName(this IContent content, string partDefinitionName, string fieldName) {
            var val = string.Empty;
            var part = string.IsNullOrEmpty(partDefinitionName) ? content : content.As(partDefinitionName);

            if (part != null) {
                var cast = (ContentPart)part;
                var field = cast.Fields.FirstOrDefault(x => x.Name == fieldName);

                if (field != null) {
                    return ((MediaLibraryPickerField)field).GetDefaultMediaUrl();
                }
            }

            return string.Empty;
        }
    }
}