public PageInfoTeste(EntityConexao entityConexao)
{
dbContext = entityConexao.DataBaseConfiguration();
userEntityFramework = new PageInfoRepositorio(dbContext);
this.builder = new PageInfoBuilder();
transaction = dbContext.Database.BeginTransaction();
}
/// <summary>
/// Given the summary of a page asynchronously.
/// </summary>
/// <exception cref="ArgumentNullException">title is null.</exception>
/// <exception cref="ArgumentException">title is invalid.</exception>
/// <remarks>Do not modify the returned objects.</remarks>
public async Task <IList <PageInfo> > GetPageSummaryAsync(IEnumerable <string> titles)
{
if (titles == null)
{
throw new ArgumentNullException(nameof(titles));
}
var site = await GetSiteAsync();
var titleList = titles.Select(t => WikiLink.NormalizeWikiLink(site, t)).ToArray();
var pagesToCheck = new List <Page>();
var pagesToFetch = new List <Page>();
var pagesToCheckRedirect = new List <Tuple <Page, PageInfo> >();
var parser = new Lazy <WikitextParser>();
// First, check whether we need to contact the server for each of the page title.
foreach (var title in titleList)
{
var cached = _PageSummaryCache.TryGetValue(title);
if (cached != null && DateTime.Now - cached.Item2 < _CacheExpiry)
{
continue;
}
pagesToCheck.Add(new Page(site, title));
}
await pagesToCheck.RefreshAsync();
foreach (var page in pagesToCheck)
{
var cached = _PageSummaryCache.TryGetValue(page.Title);
// Check if the cache is obsolete.
if (cached != null && page.LastRevisionId == cached.Item1.LastRevisionId)
{
_PageSummaryCache[page.Title] = Tuple.Create(cached.Item1, DateTime.Now);
continue;
}
// We need to fetch the whole page.
pagesToFetch.Add(page);
}
// Fetch information & content.
await pagesToFetch.RefreshAsync(PageQueryOptions.FetchContent);
foreach (var page in pagesToFetch)
{
var info = PageInfoBuilder.BuildBasicInfo(page, parser.Value);
_PageSummaryCache[page.Title] = Tuple.Create(info, DateTime.Now);
if (page.IsRedirect)
{
pagesToCheckRedirect.Add(Tuple.Create(page, info));
}
}
// Fetch redirects.
await pagesToCheckRedirect.Select(t => t.Item1).RefreshAsync(PageQueryOptions.ResolveRedirects);
foreach (var tp in pagesToCheckRedirect)
{
var path = tp.Item1.RedirectPath.ToList();
// Add & complete redirect path
path.Add(tp.Item1.Title);
tp.Item2.RedirectPath = path;
}
return(titleList.Select(t => _PageSummaryCache[t].Item1).ToArray());
}
