/// <summary>
/// Properly creates a new PageQuery. That means that after the setting of URL and depth, you can call .Scrape()
/// and actually download some webpages.
/// </summary>
public async Task <PageQuery> CreateNew()
{
PageQueryData data = new PageQueryData();
Context.PageQueries.Add(data);
Context.SaveChanges();
return(GetByData(data));
}
/// <summary>
/// Helper method to obtain PageQuery from its database entity.
/// </summary>
/// <param name="data">Database entity</param>
public PageQuery GetByData(PageQueryData data)
{
if (data.WrapperPageQuery == null)
{
data.WrapperPageQuery = new PageQuery(data, this);
}
return(data.WrapperPageQuery);
}
/// <summary>
/// Returns already created PageQuery. It is possible to rescrape it or change its properties.
/// </summary>
/// <param name="Id">Unique numeric identifier of PageQuery</param>
public PageQuery GetById(int Id)
{
PageQueryData data = Context.PageQueries.Find(Id);
if (data == null)
{
return(null);
}
return(GetByData(data));
}