/// <summary>
/// sends the data back to the server.
/// </summary>
/// <returns>the reflected entry from the server if any given</returns>
public Y Update <Y>(Y entry) where Y : Entry, new()
{
if (entry == null)
{
throw new ArgumentNullException("Entry was null");
}
if (entry.AtomEntry == null)
{
throw new ArgumentNullException("Entry.AtomEntry was null");
}
Y r = null;
FeedQuery q = PrepareQuery <FeedQuery>(entry.AtomEntry.EditUri.ToString());
Stream s = this.Service.EntrySend(q.Uri, entry.AtomEntry, GDataRequestType.Update, null);
AtomEntry ae = this.Service.CreateAndParseEntry(s, new Uri(entry.AtomEntry.EditUri.ToString()));
if (ae != null)
{
r = new Y();
r.AtomEntry = ae;
}
return(r);
}
/// <summary>Constructor, given a category as a string from the URI.</summary>
public QueryCategory(string strCategory, QueryCategoryOperator op)
{
Tracing.TraceMsg("Depersisting category from: " + strCategory);
this.categoryOperator = op;
strCategory = FeedQuery.CleanPart(strCategory);
// let's parse the string
if (strCategory[0] == '-')
{
// negator
this.isExcluded = true;
// remove him
strCategory = strCategory.Substring(1, strCategory.Length - 1);
}
// let's extract the scheme if there is one...
int iStart = strCategory.IndexOf('{');
int iEnd = strCategory.IndexOf('}');
AtomUri scheme = null;
if (iStart != -1 && iEnd != -1)
{
iEnd++;
iStart++;
scheme = new AtomUri(strCategory.Substring(iStart, iEnd - iStart - 1));
// the rest is then
strCategory = strCategory.Substring(iEnd, strCategory.Length - iEnd);
}
Tracing.TraceMsg("Category found: " + strCategory + " - scheme: " + scheme);
this.category = new AtomCategory(strCategory, scheme);
}
/// <summary>
/// takes the given Entry and inserts its into the server
/// </summary>
/// <returns>the reflected entry from the server if any given</returns>
public Y Insert <Y>(Uri address, Y entry) where Y : Entry, new()
{
if (entry == null)
{
throw new ArgumentNullException("Entry was null");
}
if (entry.AtomEntry == null)
{
throw new ArgumentNullException("Entry.AtomEntry was null");
}
if (address == null)
{
throw new ArgumentNullException("Address was null");
}
Y r = null;
FeedQuery q = PrepareQuery <FeedQuery>(address.AbsoluteUri);
AtomEntry ae = this.Service.Insert(q.Uri, entry.AtomEntry);
if (ae != null)
{
r = new Y();
r.AtomEntry = ae;
}
return(r);
}
/// <summary>
/// returns a refreshed version of the entry you passed in, by going back to the server and
/// requesting this resource again
/// </summary>
/// <example>
/// The following code illustrates a possible use of
/// the <c>Get</c> method:
/// <code>
/// YouTubeRequestSettings settings = new YouTubeRequestSettings("yourApp", "yourClient", "yourKey", "username", "pwd");
/// YouTubeRequest f = new YouTubeRequest(settings);
/// Feed<Playlist> feed = f.GetPlaylistsFeed(null);
/// Feed<Playlist> next = f.Get<Playlist>(feed, FeedRequestType.Next);
/// </code>
/// </example>
/// <param name="entry">the entry to get again</param>
/// <returns></returns>
public Y Retrieve <Y>(Y entry) where Y : Entry, new()
{
if (entry == null)
{
throw new ArgumentNullException("entry was null");
}
if (entry.AtomEntry == null)
{
throw new ArgumentNullException("entry.AtomEntry was null");
}
string spec = entry.AtomEntry.SelfUri.ToString();
if (!String.IsNullOrEmpty(spec))
{
FeedQuery q = new FeedQuery(spec);
ISupportsEtag ise = entry.AtomEntry as ISupportsEtag;
if (ise != null && ise.Etag != null)
{
q.Etag = ise.Etag;
}
return(Retrieve <Y>(q));
}
return(null);
}
/// <summary>
/// Returns a single Atom entry based upon its unique URI.
/// </summary>
/// <param name="entryUri">The URI of the Atom entry.</param>
/// <returns>AtomEntry representing the entry.</returns>
public AtomEntry Get(string entryUri)
{
FeedQuery query = new FeedQuery(entryUri);
AtomFeed resultFeed = Query(query);
return(resultFeed.Entries[0]);
}
/// <summary>Passing in a complete URI, we strip all the
/// GData query-related things and then treat the rest
/// as the base URI. For this we create a service.</summary>
/// <param name="uri">a complete URI</param>
/// <param name="service">the new GData service for this URI</param>
/// <param name="query">the parsed query object for this URI</param>
//public static void Parse(Uri uri, out Service service, out FeedQuery query)
//{
// query = new FeedQuery();
// query.ParseUri(uri);
// service = new Service();
//}
public static void Parse(Uri uri, out object service, out FeedQuery query)
{
query = new FeedQuery();
query.ParseUri(uri);
service = null; // new Service();
}
/// <summary>
/// creates a feed of Y object based on the query and the settings
/// </summary>
/// <typeparam name="Y"></typeparam>
/// <param name="q"></param>
/// <returns></returns>
protected virtual Feed <Y> PrepareFeed <Y>(FeedQuery q) where Y : Entry, new()
{
PrepareQuery(q);
Feed <Y> f = CreateFeed <Y>(q);
f.Settings = this.settings;
f.AutoPaging = this.settings.AutoPaging;
f.Maximum = this.settings.Maximum;
return(f);
}
/// <summary>
/// returns the entry the Uri pointed to
/// </summary>
/// <param name="entryUri">the Uri of the entry</param>
/// <returns></returns>
public Y Retrieve <Y>(Uri entryUri) where Y : Entry, new()
{
string spec = entryUri.AbsoluteUri;
if (!String.IsNullOrEmpty(spec))
{
FeedQuery q = new FeedQuery(spec);
return(Retrieve <Y>(q));
}
return(null);
}
/// <summary>
/// returns a the entry the Uri pointed to
/// </summary>
/// <example>
/// <param name="entryUri">the Uri of the entry</param>
/// <returns></returns>
public Y Retrieve <Y>(FeedQuery query) where Y : Entry, new()
{
Feed <Y> f = null;
Y r = null;
f = PrepareFeed <Y>(query);
// this should be a feed of one...
foreach (Y y in f.Entries)
{
r = y;
}
return(r);
}
/// <summary>
/// helper method to setup a query object with some parameters
/// based on a requestsettings
/// </summary>
/// <param name="q"></param>
/// <param name="settings"></param>
internal static void PrepareQuery(FeedQuery q, RequestSettings settings)
{
if (settings.PageSize != -1)
{
q.NumberToRetrieve = settings.PageSize;
}
if (settings.OAuthUser != null)
{
q.OAuthRequestorId = settings.OAuthUser;
if (settings.OAuthDomain != null)
{
q.OAuthRequestorId += "@" + settings.OAuthDomain;
}
}
}
/// <summary>
/// helper to format a DateTime parameter into the query
/// </summary>
/// <param name="value"></param>
/// <param name="parameterName"></param>
/// <param name="connect"></param>
/// <param name="builder"></param>
/// <returns></returns>
protected static char AppendQueryPart(DateTime value, string parameterName, char connect, StringBuilder builder)
{
if (builder == null)
{
throw new ArgumentNullException("builder");
}
if (builder.ToString().IndexOf(parameterName + "=") == -1)
{
if (Utilities.IsPersistable(value))
{
return(FeedQuery.AppendQueryPart(Utilities.LocalDateTimeInUTC(value), parameterName, connect, builder));
}
}
return(connect);
}
/// <summary>
/// returns a new feed based on the operation passed in. This is useful if you either do not use
/// autopaging, or want to move to previous parts of the feed, or get a refresh of the current feed
/// </summary>
/// <example>
/// The following code illustrates a possible use of
/// the <c>Get</c> method:
/// <code>
/// YouTubeRequestSettings settings = new YouTubeRequestSettings("yourApp", "yourClient", "yourKey", "username", "pwd");
/// YouTubeRequest f = new YouTubeRequest(settings);
/// Feed<Playlist> feed = f.GetPlaylistsFeed(null);
/// Feed<Playlist> next = f.Get<Playlist>(feed, FeedRequestType.Next);
/// </code>
/// </example>
/// <param name="feed">the original feed</param>
/// <param name="operation">an requesttype to indicate what to retrieve</param>
/// <returns></returns>
public Feed <Y> Get <Y>(Feed <Y> feed, FeedRequestType operation) where Y : Entry, new()
{
Feed <Y> f = null;
string spec = null;
if (feed == null)
{
throw new ArgumentNullException("feed was null");
}
if (feed.AtomFeed == null)
{
throw new ArgumentNullException("feed.AtomFeed was null");
}
switch (operation)
{
case FeedRequestType.Next:
spec = feed.AtomFeed.NextChunk;
break;
case FeedRequestType.Prev:
spec = feed.AtomFeed.PrevChunk;
break;
case FeedRequestType.Refresh:
spec = feed.AtomFeed.Self;
break;
}
if (!String.IsNullOrEmpty(spec))
{
FeedQuery q = new FeedQuery(spec);
if (operation == FeedRequestType.Refresh)
{
ISupportsEtag ise = feed.AtomFeed as ISupportsEtag;
if (ise != null && ise.Etag != null)
{
q.Etag = ise.Etag;
}
}
f = PrepareFeed <Y>(q);
}
return(f);
}
/// <summary>executes the query and returns an AtomFeed object tree</summary>
/// <param name="feedQuery">the query parameters as a FeedQuery object </param>
/// <returns>AtomFeed object tree</returns>
public AtomFeed Query(FeedQuery feedQuery)
{
AtomFeed feed = null;
Tracing.TraceCall("Enter");
if (feedQuery == null)
{
throw new System.ArgumentNullException("feedQuery", "The query argument MUST not be null");
}
// Create a new request to the Uri in the query object...
Uri targetUri = null;
try
{
targetUri = feedQuery.Uri;
}
catch (System.UriFormatException)
{
throw new System.ArgumentException("The query argument MUST contain a valid Uri", "feedQuery");
}
Tracing.TraceInfo("Service:Query - about to query");
Stream responseStream = null;
if (feedQuery.Etag != null)
{
responseStream = Query(targetUri, feedQuery.Etag);
}
else
{
responseStream = Query(targetUri, feedQuery.ModifiedSince);
}
Tracing.TraceInfo("Service:Query - query done");
if (responseStream != null)
{
feed = CreateAndParseFeed(responseStream, feedQuery.Uri);
}
Tracing.TraceCall("Exit");
return(feed);
}
/// <summary>
/// deletes the Entry from the Server
/// </summary>
public void Delete <Y>(Y entry) where Y : Entry, new()
{
if (entry == null)
{
throw new ArgumentNullException("Entry was null");
}
if (entry.AtomEntry == null)
{
throw new ArgumentNullException("Entry.AtomEntry was null");
}
if (entry.AtomEntry.EditUri == null)
{
throw new ArgumentNullException("The AtomEntry has no EditUri");
}
FeedQuery q = PrepareQuery <FeedQuery>(entry.AtomEntry.EditUri.ToString());
this.Service.Delete(q.Uri, entry.ETag);
}
/// <summary>
/// performs a batch operation.
/// </summary>
/// <param name="batchUri">the batch endpoint of the service</param>
/// <param name="entries">List of entries of type Y, that are to be batched</param>
/// <param name="defaultOperation">The default operation to be used for all entries</param>
/// <returns></returns>
public Feed <Y> Batch <Y>(List <Y> entries, Uri batchUri, GDataBatchOperationType defaultOperation) where Y : Entry, new()
{
if (entries.Count > 0)
{
AtomFeed batchFeed = new AtomFeed(batchUri, null);
batchFeed.BatchData = new GDataBatchFeedData();
batchFeed.BatchData.Type = defaultOperation;
foreach (Y e in entries)
{
batchFeed.Entries.Add(e.AtomEntry);
}
FeedQuery q = PrepareQuery <FeedQuery>(batchUri.AbsoluteUri);
AtomFeed resultFeed = this.Service.Batch(batchFeed, q.Uri);
Feed <Y> f = new Feed <Y>(resultFeed);
return(f);
}
return(null);
}
/// <summary>
/// gets a feed object of type T
/// </summary>
/// <typeparam name="Y"></typeparam>
/// <param name="q"></param>
/// <returns></returns>
public Feed <Y> Get <Y>(FeedQuery q) where Y : Entry, new()
{
return(PrepareFeed <Y>(q));
}
public AtomFeed Query(FeedQuery feedQuery, DateTime ifModifiedSince)
{
feedQuery.ModifiedSince = ifModifiedSince;
return(Query(feedQuery));
}
/// <summary>
/// gets a feed object of type T
/// </summary>
/// <typeparam name="Y"></typeparam>
/// <param name="uri">The Uri to retrieve</param>
/// <returns></returns>
public Feed <Y> Get <Y>(Uri uri) where Y : Entry, new()
{
FeedQuery q = new FeedQuery(uri.AbsoluteUri);
return(PrepareFeed <Y>(q));
}
/// <summary>
/// constructs a new feed object based on a service and a query
/// </summary>
/// <param name="service"></param>
/// <param name="q"></param>
public Feed(Service service, FeedQuery q)
{
this.service = service;
this.query = q;
}
public void Delete(Uri targetUrl, string eTag)
{
FeedQuery q = PrepareQuery <FeedQuery>(targetUrl.AbsoluteUri);
this.Service.Delete(q.Uri, eTag);
}
/// <summary>
/// the virtual creator function for feeds, so that we can create feedsubclasses in
/// in subclasses of the request
/// </summary>
/// <param name="q"></param>
/// <returns></returns>
protected virtual Feed <Y> CreateFeed <Y>(FeedQuery q) where Y : Entry, new()
{
return(new Feed <Y>(this.atomService, q));
}
/// <summary>
/// prepares the passed in query objects properties based on the settings
/// </summary>
/// <param name="q"></param>
protected void PrepareQuery(FeedQuery q)
{
FeedQuery.PrepareQuery(q, this.settings);
}