/// <summary>
/// Asynchronously fetches the specified users' information.
/// </summary>
/// <param name="site">The site to issue the request.</param>
/// <param name="userNames">The user names to be fetched.</param>
/// <exception cref="ArgumentNullException">Either <paramref name="site"/> or <paramref name="userNames"/> is <c>null</c>.</exception>
/// <returns>
/// An asynchronous sequence containing the detailed user information.
/// The user names are normalized by the server. Inexistent user names are skipped.
/// </returns>
public static async IAsyncEnumerable <UserInfo> FetchUsersAsync(this WikiaSite site, IEnumerable <string> userNames,
[EnumeratorCancellation] CancellationToken cancellationToken = default)
{
if (site == null)
{
throw new ArgumentNullException(nameof(site));
}
if (userNames == null)
{
throw new ArgumentNullException(nameof(userNames));
}
using (site.BeginActionScope(null, (object)(userNames as ICollection)))
{
foreach (var names in userNames.Partition(100))
{
JToken jresult;
try
{
jresult = await site.InvokeWikiaApiAsync("/User/Details",
new WikiaQueryRequestMessage(new { ids = string.Join(", ", names) }), cancellationToken);
}
catch (WikiaApiException ex) when(ex.ErrorType == "NotFoundApiException")
{
// All the usesers in this batch are not found.
// Pity.
continue;
}
var basePath = (string)jresult["basepath"];
var users = jresult["items"].ToObject <ICollection <UserInfo> >();
if (basePath != null)
{
foreach (var user in users)
{
user.ApplyBasePath(basePath);
}
}
using (ExecutionContextStash.Capture())
foreach (var user in users)
{
yield return(user);
}
}
}
}
/// <summary>
/// Asynchronously fetches the specified users' information.
/// </summary>
/// <param name="site">The site to issue the request.</param>
/// <param name="userNames">The user names to be fetched.</param>
/// <exception cref="ArgumentNullException">Either <paramref name="site"/> or <paramref name="userNames"/> is <c>null</c>.</exception>
/// <returns>
/// An asynchronous sequence containing the detailed user information.
/// The user names are normalized by the server. Inexistent user names are skipped.
/// </returns>
public static IAsyncEnumerable <UserInfo> FetchUsersAsync(this WikiaSite site, IEnumerable <string> userNames)
{
if (site == null)
{
throw new ArgumentNullException(nameof(site));
}
if (userNames == null)
{
throw new ArgumentNullException(nameof(userNames));
}
return(AsyncEnumerableFactory.FromAsyncGenerator <UserInfo>(async(sink, ct) =>
{
using (site.BeginActionScope(null, (object)(userNames as ICollection)))
{
foreach (var names in userNames.Partition(100))
{
JToken jresult;
try
{
jresult = await site.InvokeWikiaApiAsync("/User/Details",
new WikiaQueryRequestMessage(new { ids = string.Join(", ", names) }), ct);
}
catch (WikiaApiException ex) when(ex.ErrorType == "NotFoundApiException")
{
// All the usesers in this batch are not found.
// Pity.
continue;
}
var basePath = (string)jresult["basepath"];
var users = jresult["items"].ToObject <ICollection <UserInfo> >();
if (basePath != null)
{
foreach (var user in users)
{
user.ApplyBasePath(basePath);
}
}
await sink.YieldAndWait(users);
}
}
}));
}
/// <summary>
/// Asynchronously fetches the specified user's information.
/// </summary>
/// <param name="site">The site to issue the request.</param>
/// <param name="userName">The user name to be fetched.</param>
/// <param name="cancellationToken">A token used to cancel the request.</param>
/// <exception cref="ArgumentNullException">Either <paramref name="site"/> or <paramref name="userName"/> is <c>null</c>.</exception>
/// <returns>A task that returns the requested user information, or <c>null</c> for inexistent user.</returns>
public static async Task <UserInfo> FetchUserAsync(this WikiaSite site,
string userName, CancellationToken cancellationToken)
{
if (site == null)
{
throw new ArgumentNullException(nameof(site));
}
if (userName == null)
{
throw new ArgumentNullException(nameof(userName));
}
if (userName.Contains(','))
{
throw new ArgumentException("User name cannot contain comma (,).", nameof(userName));
}
using (site.BeginActionScope(null, (object)userName))
{
JToken jresult;
try
{
jresult = await site.InvokeWikiaApiAsync("/User/Details",
new WikiaQueryRequestMessage(new { ids = userName }), cancellationToken);
}
catch (NotFoundApiException)
{
return(null);
}
var user = jresult["items"][0].ToObject <UserInfo>();
if (user == null)
{
return(null);
}
var basePath = (string)jresult["basepath"];
if (basePath != null)
{
user.ApplyBasePath(basePath);
}
return(user);
}
}
/// <summary>
/// Asynchronously fetches the specified page's related pages.
/// </summary>
/// <param name="site">The site to issue the request.</param>
/// <param name="pageId">ID of the page to find the related ones.</param>
/// <param name="maxCount">Maximum count of the returned items.</param>
/// <param name="cancellationToken">A token used to cancel the operation.</param>
/// <exception cref="ArgumentNullException"><paramref name="site"/> is <c>null</c>.</exception>
/// <exception cref="ArgumentOutOfRangeException"><paramref name="pageId"/> is less than or equals to 0.</exception>
/// <exception cref="NotFoundApiException"><c>Related Pages</c> extension is not available.</exception>
/// <returns></returns>
public static async Task <IList <RelatedPageItem> > FetchRelatedPagesAsync(this WikiaSite site,
int pageId, int maxCount, CancellationToken cancellationToken)
{
if (site == null)
{
throw new ArgumentNullException(nameof(site));
}
if (maxCount <= 0)
{
throw new ArgumentOutOfRangeException(nameof(maxCount));
}
using (site.BeginActionScope(null, pageId, maxCount))
{
var jresult = await site.InvokeWikiaApiAsync("/RelatedPages/List",
new WikiaQueryRequestMessage(new { ids = pageId, limit = maxCount }),
cancellationToken);
var jitems = jresult["items"][pageId.ToString(CultureInfo.InvariantCulture)];
if (jitems == null)
{
jitems = ((JProperty)jresult["items"].First)?.Value;
}
if (jitems == null || !jitems.HasValues)
{
return(Array.Empty <RelatedPageItem>());
}
var items = jitems.ToObject <IList <RelatedPageItem> >();
var basePath = (string)jresult["basepath"];
if (basePath != null)
{
foreach (var i in items)
{
i.ApplyBasePath(basePath);
}
}
return(items);
}
}
