void OnLoadNewPostComplted(CKQueryCursor cursor, NSError operationError, List <Post> newPosts, Post lastRecordInOperation, Post retryPost)
{
Error error = HandleError(operationError);
switch (error)
{
case Error.Success:
// lastRecordCreationDate is the most recent record we've seen on server, let's set our property to that for next time we get a push
lastPostSeenOnServer = lastRecordInOperation ?? lastPostSeenOnServer;
// This sorts the newPosts array in ascending order
newPosts.Sort(PostComparison);
// Takes our newPosts array and inserts the items into the table array one at a time
foreach (Post p in newPosts)
{
updateCellArrayQueue.DispatchAsync(() => {
PostCells.Insert(0, p);
DispatchQueue.MainQueue.DispatchAsync(reloadHandler);
});
}
DispatchQueue.MainQueue.DispatchAsync(RefreshControl.EndRefreshing);
break;
case Error.Retry:
Utils.Retry(() => LoadNewPosts(retryPost), operationError);
break;
case Error.Ignore:
Console.WriteLine("Error: {0}", operationError.Description);
DispatchQueue.MainQueue.DispatchAsync(RefreshControl.EndRefreshing);
break;
default:
throw new NotImplementedException();
}
}
void OnPostLoadingCompleted(CKQueryCursor cursor, NSError operationError)
{
Error error = HandleError(operationError);
switch (error)
{
case Error.Success:
postCursor = cursor;
haveOldestPost = cursor == null;
isLoadingBatch = false;
PostCells.AddRange(downloadingBatchStorage);
if (lastPostSeenOnServer == null && PostCells.Count > 0)
{
lastPostSeenOnServer = PostCells [0];
DispatchQueue.MainQueue.DispatchAsync(RefreshControl.EndRefreshing);
}
DispatchQueue.MainQueue.DispatchAsync(reloadHandler);
break;
case Error.Retry:
Utils.Retry(() => {
isLoadingBatch = false;
LoadBatch();
}, operationError);
break;
case Error.Ignore:
isLoadingBatch = false;
DispatchQueue.MainQueue.DispatchAsync(RefreshControl.EndRefreshing);
Console.WriteLine("Error: {0}", operationError.Description);
break;
default:
break;
}
}
public void ResetWithTagString(string tags)
{
// Reloads table with new tag settings
// First, anything the table is updating with now is potentially invalid, cancel any current updates
fetchRecordQueue.CancelAllOperations();
// This should only be filled with array add operations, best to just wait for it to finish
updateCellArrayQueue.DispatchSync(() => {
});
// Resets the table to be empty
PostCells.Clear();
lastPostSeenOnServer = null;
reloadHandler();
// Sets tag array and prepares table for initial update
tagArray = string.IsNullOrWhiteSpace(tags)
? new string[0]
: tags.ToLower().Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
postCursor = null;
isLoadingBatch = false;
haveOldestPost = false;
LoadBatch();
}
void LoadImages()
{
// If we're already loading a set of images or there are no images left to load, just return
lock (locker) {
if (isLoadingBatch || firstThumbnailLoaded)
{
return;
}
else
{
isLoadingBatch = true;
}
}
// If we have a cursor, continue where we left off, otherwise set up new query
CKQueryOperation queryOp = null;
if (imageCursor != null)
{
queryOp = new CKQueryOperation(imageCursor);
}
else
{
CKQuery thumbnailQuery = new CKQuery(Image.RecordType, NSPredicate.FromValue(true));
thumbnailQuery.SortDescriptors = Utils.CreateCreationDateDescriptor(ascending: false);
queryOp = new CKQueryOperation(thumbnailQuery);
}
// We only want to download the thumbnails, not the full image
queryOp.DesiredKeys = new string[] {
Image.ThumbnailKey
};
queryOp.ResultsLimit = UpdateBy;
queryOp.RecordFetched = (CKRecord record) => {
ImageCollection.AddImageFromRecord(record);
InvokeOnMainThread(() => {
loadingImages.StopAnimating();
ImageCollection.ReloadData();
});
};
queryOp.Completed = (CKQueryCursor cursor, NSError error) => {
Error errorResponse = HandleError(error);
if (errorResponse == Error.Success)
{
imageCursor = cursor;
isLoadingBatch = false;
if (cursor == null)
{
firstThumbnailLoaded = true; // If cursor is nil, lock this method indefinitely (all images have been loaded)
}
}
else if (errorResponse == Error.Retry)
{
// If there's no specific number of seconds we're told to wait, default to 3
Utils.Retry(() => {
// Resets so we can load images again and then goes to load
isLoadingBatch = false;
LoadImages();
}, error);
}
else if (errorResponse == Error.Ignore)
{
// If we get an ignore error they're not often recoverable. I'll leave loadImages locked indefinitely (this is up to the developer)
Console.WriteLine("Error: {0}", error.Description);
string errorTitle = "Error";
string dismissButton = "Okay";
string errorMessage = "We couldn't fetch one or more of the thumbnails";
UIAlertController alert = UIAlertController.Create(errorTitle, errorMessage, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create(dismissButton, UIAlertActionStyle.Cancel, null));
InvokeOnMainThread(() => PresentViewController(alert, true, null));
}
};
PublicCloudDatabase.AddOperation(queryOp);
}
public void ResetWithTagString(string tags)
{
// Reloads table with new tag settings
// First, anything the table is updating with now is potentially invalid, cancel any current updates
fetchRecordQueue.CancelAllOperations ();
// This should only be filled with array add operations, best to just wait for it to finish
updateCellArrayQueue.DispatchSync (() => {
});
// Resets the table to be empty
PostCells.Clear ();
lastPostSeenOnServer = null;
reloadHandler ();
// Sets tag array and prepares table for initial update
tagArray = string.IsNullOrWhiteSpace (tags)
? new string[0]
: tags.ToLower ().Split (new char[]{ ' ' }, StringSplitOptions.RemoveEmptyEntries);
postCursor = null;
isLoadingBatch = false;
haveOldestPost = false;
LoadBatch ();
}
void OnLoadNewPostComplted(CKQueryCursor cursor, NSError operationError, List<Post> newPosts, Post lastRecordInOperation, Post retryPost)
{
Error error = HandleError (operationError);
switch (error) {
case Error.Success:
// lastRecordCreationDate is the most recent record we've seen on server, let's set our property to that for next time we get a push
lastPostSeenOnServer = lastRecordInOperation ?? lastPostSeenOnServer;
// This sorts the newPosts array in ascending order
newPosts.Sort (PostComparison);
// Takes our newPosts array and inserts the items into the table array one at a time
foreach (Post p in newPosts) {
updateCellArrayQueue.DispatchAsync (() => {
PostCells.Insert (0, p);
DispatchQueue.MainQueue.DispatchAsync (reloadHandler);
});
}
DispatchQueue.MainQueue.DispatchAsync (RefreshControl.EndRefreshing);
break;
case Error.Retry:
Utils.Retry(()=> LoadNewPosts(retryPost), operationError);
break;
case Error.Ignore:
Console.WriteLine ("Error: {0}", operationError.Description);
DispatchQueue.MainQueue.DispatchAsync(RefreshControl.EndRefreshing);
break;
default:
throw new NotImplementedException ();
}
}
void OnPostLoadingCompleted(CKQueryCursor cursor, NSError operationError)
{
Error error = HandleError (operationError);
switch (error) {
case Error.Success:
postCursor = cursor;
haveOldestPost = cursor == null;
isLoadingBatch = false;
PostCells.AddRange (downloadingBatchStorage);
if (lastPostSeenOnServer == null && PostCells.Count > 0) {
lastPostSeenOnServer = PostCells [0];
DispatchQueue.MainQueue.DispatchAsync(RefreshControl.EndRefreshing);
}
DispatchQueue.MainQueue.DispatchAsync (reloadHandler);
break;
case Error.Retry:
Utils.Retry (() => {
isLoadingBatch = false;
LoadBatch ();
}, operationError);
break;
case Error.Ignore:
isLoadingBatch = false;
DispatchQueue.MainQueue.DispatchAsync (RefreshControl.EndRefreshing);
Console.WriteLine ("Error: {0}", operationError.Description);
break;
default:
break;
}
}
void LoadImages()
{
// If we're already loading a set of images or there are no images left to load, just return
lock (locker) {
if (isLoadingBatch || firstThumbnailLoaded)
return;
else
isLoadingBatch = true;
}
// If we have a cursor, continue where we left off, otherwise set up new query
CKQueryOperation queryOp = null;
if (imageCursor != null) {
queryOp = new CKQueryOperation (imageCursor);
} else {
CKQuery thumbnailQuery = new CKQuery (Image.RecordType, NSPredicate.FromValue (true));
thumbnailQuery.SortDescriptors = Utils.CreateCreationDateDescriptor (ascending: false);
queryOp = new CKQueryOperation (thumbnailQuery);
}
// We only want to download the thumbnails, not the full image
queryOp.DesiredKeys = new string[] {
Image.ThumbnailKey
};
queryOp.ResultsLimit = UpdateBy;
queryOp.RecordFetched = (CKRecord record) => {
ImageCollection.AddImageFromRecord (record);
InvokeOnMainThread (() => {
loadingImages.StopAnimating ();
ImageCollection.ReloadData ();
});
};
queryOp.Completed = (CKQueryCursor cursor, NSError error) => {
Error errorResponse = HandleError (error);
if (errorResponse == Error.Success) {
imageCursor = cursor;
isLoadingBatch = false;
if (cursor == null)
firstThumbnailLoaded = true; // If cursor is nil, lock this method indefinitely (all images have been loaded)
} else if (errorResponse == Error.Retry) {
// If there's no specific number of seconds we're told to wait, default to 3
Utils.Retry (() => {
// Resets so we can load images again and then goes to load
isLoadingBatch = false;
LoadImages ();
}, error);
} else if (errorResponse == Error.Ignore) {
// If we get an ignore error they're not often recoverable. I'll leave loadImages locked indefinitely (this is up to the developer)
Console.WriteLine ("Error: {0}", error.Description);
string errorTitle = "Error";
string dismissButton = "Okay";
string errorMessage = "We couldn't fetch one or more of the thumbnails";
UIAlertController alert = UIAlertController.Create (errorTitle, errorMessage, UIAlertControllerStyle.Alert);
alert.AddAction (UIAlertAction.Create (dismissButton, UIAlertActionStyle.Cancel, null));
InvokeOnMainThread (() => PresentViewController (alert, true, null));
}
};
PublicCloudDatabase.AddOperation (queryOp);
}