BuildFeed/BuildFeed.Model/MetaItem.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;
using System.Web.Mvc;
using MongoDB.Bson;
using MongoDB.Bson.Serialization.Attributes;
using MongoDB.Driver;
using Required = System.ComponentModel.DataAnnotations.RequiredAttribute;

namespace BuildFeed.Model
{
   [DataObject]
   public class MetaItemModel
   {
      [Key]
      [BsonId]
      [@Required]
      public MetaItemKey Id { get; set; }

      [DisplayName("Meta Description")]
      public string MetaDescription { get; set; }

      [DisplayName("Page Content")]
      [AllowHtml]
      public string PageContent { get; set; }
   }

   public class MetaItem
   {
      private const string META_COLLECTION_NAME = "metaitem";

      private readonly IMongoCollection<MetaItemModel> _metaCollection;
      private readonly BuildRepository _bModel;

      public MetaItem()
      {
         MongoClientSettings settings = new MongoClientSettings
         {
            Server = new MongoServerAddress(MongoConfig.Host, MongoConfig.Port)
         };

         if (!string.IsNullOrEmpty(MongoConfig.Username) && !string.IsNullOrEmpty(MongoConfig.Password))
         {
            settings.Credentials = new List<MongoCredential>
            {
               MongoCredential.CreateCredential(MongoConfig.Database, MongoConfig.Username, MongoConfig.Password)
            };
         }

         MongoClient dbClient = new MongoClient(settings);

         _metaCollection = dbClient.GetDatabase(MongoConfig.Database).GetCollection<MetaItemModel>(META_COLLECTION_NAME);
         _bModel = new BuildRepository();
      }

      [DataObjectMethod(DataObjectMethodType.Select, false)]
      public async Task<IEnumerable<MetaItemModel>> Select() { return await _metaCollection.Find(new BsonDocument()).ToListAsync(); }

      [DataObjectMethod(DataObjectMethodType.Select, true)]
      public async Task<IEnumerable<MetaItemModel>> SelectByType(MetaType type) { return await _metaCollection.Find(f => f.Id.Type == type).ToListAsync(); }

      [DataObjectMethod(DataObjectMethodType.Select, false)]
      public async Task<MetaItemModel> SelectById(MetaItemKey id) { return await _metaCollection.Find(f => f.Id.Type == id.Type && f.Id.Value == id.Value).SingleOrDefaultAsync(); }

      [DataObjectMethod(DataObjectMethodType.Select, false)]
      public async Task<IEnumerable<string>> SelectUnusedLabs()
      {
         string[] labs = await _bModel.SelectAllLabs();

         List<MetaItemModel> usedLabs = await _metaCollection.Find(f => f.Id.Type == MetaType.Lab).ToListAsync();

         return from l in labs
                where usedLabs.All(ul => ul.Id.Value != l)
                select l;
      }

      [DataObjectMethod(DataObjectMethodType.Select, false)]
      public async Task<IEnumerable<string>> SelectUnusedVersions()
      {
         BuildVersion[] versions = await _bModel.SelectAllVersions();

         List<MetaItemModel> usedVersions = await _metaCollection.Find(f => f.Id.Type == MetaType.Version).ToListAsync();

         return from v in versions
                where usedVersions.All(ul => ul.Id.Value != v.ToString())
                select v.ToString();
      }

      [DataObjectMethod(DataObjectMethodType.Select, false)]
      public async Task<IEnumerable<string>> SelectUnusedYears()
      {
         int[] years = await _bModel.SelectAllYears();

         List<MetaItemModel> usedYears = await _metaCollection.Find(f => f.Id.Type == MetaType.Year).ToListAsync();

         return from y in years
                where usedYears.All(ul => ul.Id.Value != y.ToString())
                select y.ToString();
      }

      [DataObjectMethod(DataObjectMethodType.Insert, true)]
      public async Task Insert(MetaItemModel item) { await _metaCollection.InsertOneAsync(item); }

      [DataObjectMethod(DataObjectMethodType.Update, true)]
      public async Task Update(MetaItemModel item) { await _metaCollection.ReplaceOneAsync(f => f.Id.Type == item.Id.Type && f.Id.Value == item.Id.Value, item); }

      [DataObjectMethod(DataObjectMethodType.Insert, false)]
      public async Task InsertAll(IEnumerable<MetaItemModel> items) { await _metaCollection.InsertManyAsync(items); }

      [DataObjectMethod(DataObjectMethodType.Delete, true)]
      public async Task DeleteById(MetaItemKey id) { await _metaCollection.DeleteOneAsync(f => f.Id.Type == id.Type && f.Id.Value == id.Value); }
   }

   public class MetaItemKey
   {
      public MetaType Type { get; set; }
      public string Value { get; set; }

      public MetaItemKey() { }

      public MetaItemKey(string id)
      {
         string[] items = id.Split(':');
         Type = (MetaType)Enum.Parse(typeof(MetaType), items[0]);
         Value = items[1];
      }

      public override string ToString() { return $"{Type}:{Value}"; }
   }

   public enum MetaType
   {
      Lab,
      Version,
      Source,
      Year
   }
}