/// <summary>
/// 向数据源中添加帖子。
/// </summary>
/// <param name="dataFacade">数据源的外观。</param>
/// <param name="indexEntity">帖子索引实体对象。</param>
/// <param name="contentEntity">帖子内容对象。</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="dataFacade"/>为null
/// 或
/// <paramref name="indexEntity"/>为null
/// 或
/// <paramref name="contentEntity"/>为null
/// </exception>
/// <exception cref="DataFacadeException">数据源抛出了未经处理的异常</exception>
public static async Task <int> AddPost(this IDataFacade dataFacade,
PostEntity indexEntity, PostContentEntity contentEntity)
{
if (dataFacade == null)
{
throw new ArgumentNullException(nameof(dataFacade));
}
if (indexEntity == null)
{
throw new ArgumentNullException(nameof(indexEntity));
}
if (contentEntity == null)
{
throw new ArgumentNullException(nameof(contentEntity));
}
// 将内容实体对象插入到数据源中。
await dataFacade.AddPostContentEntity(contentEntity);
// 将帖子索引实体对象插入到数据源中。
dataFacade.AddPostIndexEntity(indexEntity);
await dataFacade.CommitChanges();
return(indexEntity.Id);
}
/// <inheritdoc />
public async Task AddPostContentEntity(PostContentEntity postContentEntity)
{
if (postContentEntity == null)
{
throw new ArgumentNullException(nameof(postContentEntity));
}
await AccessDataSource(async() => await _mongoDbContext.PostContents.InsertOneAsync(postContentEntity));
}
/// <inheritdoc />
public (PostEntity IndexEntity, PostContentEntity ContentEntity) CreatePostEntities(
int authorId, PostCreationInfo creationInfoModel)
{
if (creationInfoModel == null)
{
throw new ArgumentNullException(nameof(creationInfoModel));
}
var contentEntity = PostContentEntity.Create();
contentEntity.Text = creationInfoModel.Text;
var indexEntity = PostEntity.Create(authorId, creationInfoModel.RegionId, creationInfoModel.Title,
contentEntity.Id.ToByteArray());
return(indexEntity, contentEntity);
}
/// <summary>
/// 初始化 <see cref="PostListItem"/> 类的新实例。
/// </summary>
/// <param name="indexEntity">索引实体对象。</param>
/// <param name="contentEntity">内容实体对象。</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="indexEntity"/>为null
/// </exception>
public PostListItem(PostEntity indexEntity, PostContentEntity contentEntity, bool voted)
{
if (indexEntity == null)
{
throw new ArgumentNullException(nameof(indexEntity));
}
Id = indexEntity.Id;
RegionId = indexEntity.PostRegionId;
Title = indexEntity.Title;
CreationTime = indexEntity.CreationTime;
UpdateTime = indexEntity.UpdateTime;
Text = contentEntity?.Text ?? string.Empty;
NumberOfImages = contentEntity?.ImageIds.Length ?? 0;
NumberOfVotes = indexEntity.NumberOfVotes;
NumberOfComments = indexEntity.NumberOfComments;
IsVoted = voted;
}
/// <summary>
/// 初始化 <see cref="PostInfo"/> 类的新实例。
/// </summary>
/// <param name="indexEntity">索引实体对象。</param>
/// <param name="contentEntity">内容实体对象。</param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="indexEntity"/>为null
/// 或
/// <paramref name="contentEntity"/>为null
/// </exception>
public PostInfo(PostEntity indexEntity, PostContentEntity contentEntity, bool isVoted)
{
if (indexEntity == null)
{
throw new ArgumentNullException(nameof(indexEntity));
}
if (contentEntity == null)
{
throw new ArgumentNullException(nameof(contentEntity));
}
Title = indexEntity.Title;
Text = contentEntity.Text;
AuthorId = indexEntity.AuthorId;
CreationTime = indexEntity.CreationTime;
UpdateTime = indexEntity.UpdateTime;
NumberOfImages = contentEntity.ImageIds.Length;
NumberOfVotes = indexEntity.NumberOfVotes;
NumberOfComments = indexEntity.NumberOfComments;
IsVoted = isVoted;
}
/// <inheritdoc />
public async Task AddPostContentEntity(PostContentEntity postContentEntity)
{
throw new System.NotImplementedException();
}
