public void LoadNodes()
{
this.ChildNodes.Clear();
MNodeList nodeList = this._megaSdk.getChildren(this.CurrentRootNode.GetBaseNode());
for (int i = 0; i < nodeList.size(); i++)
{
ChildNodes.Add(new NodeViewModel(this._megaSdk, nodeList.get(i)));
}
}
public void GetContactSharedFolders()
{
// User must be online to perform this operation
if (!IsUserOnline())
{
return;
}
// First cancel any other loading task that is busy
CancelLoad();
// Create the option to cancel
CreateLoadCancelOption();
OnUiThread(() => InShares.ChildNodes.Clear());
MNodeList inSharesList = MegaSdk.getInShares(MegaSdk.getContact(_selectedContact.Email));
Task.Factory.StartNew(() =>
{
try
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
for (int i = 0; i < inSharesList.size(); i++)
{
// If the task has been cancelled, stop processing
if (LoadingCancelToken.IsCancellationRequested)
{
LoadingCancelToken.ThrowIfCancellationRequested();
}
// To avoid null values
if (inSharesList.get(i) == null)
{
continue;
}
var _inSharedFolder = NodeService.CreateNew(this.MegaSdk, this.AppInformation, inSharesList.get(i), ContainerType.InShares, InShares.ChildNodes);
_inSharedFolder.DefaultImagePathData = VisualResources.FolderTypePath_shared;
InShares.ChildNodes.Add(_inSharedFolder);
}
OnPropertyChanged("NumberOfInSharedFolders");
OnPropertyChanged("NumberOfInSharedFoldersText");
});
}
catch (OperationCanceledException)
{
// Do nothing. Just exit this background process because a cancellation exception has been thrown
}
}, LoadingCancelToken, TaskCreationOptions.PreferFairness, TaskScheduler.Current);
}
public void onNodesUpdate(MegaSDK api, MNodeList nodes)
{
// If the SDK has resumed the possible pending transfers
if (nodes == null)
{
// If no pending transfers to resume start a new upload
// Else it will start when finish the current transfer
if (api.getTransferData().getNumUploads() == 0)
{
ScheduledAgent.Upload();
}
}
}
private async Task RecursiveSaveForOffline(String sfoPath, NodeViewModel node)
{
if (!FolderService.FolderExists(sfoPath))
{
FolderService.CreateFolder(sfoPath);
}
String newSfoPath = Path.Combine(sfoPath, node.Name);
if (!FolderService.FolderExists(newSfoPath))
{
FolderService.CreateFolder(newSfoPath);
}
if (!SavedForOffline.ExistsNodeByLocalPath(newSfoPath))
{
SavedForOffline.Insert(node.OriginalMNode, true);
}
else
{
SavedForOffline.UpdateNode(node.OriginalMNode, true);
}
MNodeList childList = MegaSdk.getChildren(node.OriginalMNode);
for (int i = 0; i < childList.size(); i++)
{
// To avoid pass null values to CreateNew
if (childList.get(i) == null)
{
continue;
}
var childNode = NodeService.CreateNew(this.MegaSdk, this.AppInformation, childList.get(i), this.ParentContainerType);
// If node creation failed for some reason, continue with the rest and leave this one
if (childNode == null)
{
continue;
}
if (childNode.IsFolder)
{
await RecursiveSaveForOffline(newSfoPath, childNode);
}
else
{
await SaveFileForOffline(newSfoPath, childNode);
}
}
}
public void onNodesUpdate(MegaSDK api, MNodeList nodes)
{
// If the SDK has not resumed the possible pending transfers
if (nodes != null)
{
return;
}
// If no pending transfers to resume start a new upload
// Else it will start when finish the current transfer
if (api.getTransferData().getNumUploads() == 0)
{
_tcs?.TrySetResult(null);
}
}
/// <summary>
/// Get the account used space by the incoming shared folders
/// </summary>
/// <returns>Used space by the incoming shared folders</returns>
private static ulong GetIncomingSharesUsedSpace()
{
MNodeList inSharesList = SdkService.MegaSdk.getInShares();
int inSharesListSize = inSharesList.size();
ulong inSharesUsedSpace = 0;
for (int i = 0; i < inSharesListSize; i++)
{
MNode inShare = inSharesList.get(i);
if (inShare != null)
{
inSharesUsedSpace += SdkService.MegaSdk.getSize(inShare);
}
}
return(inSharesUsedSpace);
}
public void onNodesUpdate(MegaSDK api, MNodeList nodes)
{
// Exit methods when node list is incorrect
if (nodes == null || nodes.size() < 1)
{
return;
}
// Retrieve the listsize for performance reasons and store local
int listSize = nodes.size();
for (int i = 0; i < listSize; i++)
{
try
{
// Get the specific node that has an update. If null exit the method
// and process no notification
MNode megaNode = nodes.get(i);
if (megaNode == null)
{
return;
}
// Incoming shared folder
if (megaNode.isInShare())
{
if (megaNode.isRemoved()) // REMOVED Scenario
{
OnInSharedFolderRemoved(megaNode);
}
else // ADDED/UPDATED scenarios
{
OnInSharedFolderAdded(megaNode);
}
}
// Outgoing shared folder - ADDED/UPDATED scenarios
else if (megaNode.isOutShare())
{
OnOutSharedFolderAdded(megaNode);
}
else
{
// Outgoing shared folder - REMOVED Scenario
if (megaNode.hasChanged((int)MNodeChangeType.CHANGE_TYPE_OUTSHARE))
{
OnOutSharedFolderRemoved(megaNode);
}
// Normal node
if (megaNode.isRemoved()) // REMOVED Scenario
{
OnNodeRemoved(megaNode);
}
else // ADDED/UPDATED scenarions
{
OnNodeAdded(megaNode);
}
}
}
catch (Exception) { /* Dummy catch, suppress possible exception */ }
}
}
public void onNodesUpdate(MegaSDK api, MNodeList nodes)
{
// exit methods when node list is incorrect
if (nodes == null || nodes.size() < 1)
{
return;
}
try
{
// Retrieve the listsize for performance reasons and store local
int listSize = nodes.size();
for (int i = 0; i < listSize; i++)
{
bool isProcessed = false;
// Get the specific node that has an update. If null exit the method
// and process no notification
MNode megaNode = nodes.get(i);
if (megaNode == null)
{
return;
}
// PROCESS THE FOLDERS LISTENERS
if (megaNode.isRemoved())
{
// REMOVED Scenario
foreach (var folder in Folders)
{
IMegaNode nodeToRemoveFromView = folder.ChildNodes.FirstOrDefault(
node => node.Base64Handle.Equals(megaNode.getBase64Handle()));
// If node is found in current view, process the remove action
if (nodeToRemoveFromView != null)
{
// Needed because we are in a foreach loop to prevent the use of the wrong
// local variable in the dispatcher code.
var currentFolder = folder;
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
currentFolder.ChildNodes.Remove(nodeToRemoveFromView);
((FolderNodeViewModel)currentFolder.FolderRootNode).SetFolderInfo();
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
isProcessed = true;
break;
}
}
if (!isProcessed)
{
// REMOVED in subfolder scenario
MNode parentNode = api.getParentNode(megaNode);
if (parentNode != null)
{
foreach (var folder in Folders)
{
IMegaNode nodeToUpdateInView = folder.ChildNodes.FirstOrDefault(
node => node.Base64Handle.Equals(parentNode.getBase64Handle()));
// If parent folder is found, process the update action
if (nodeToUpdateInView != null)
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
nodeToUpdateInView.Update(parentNode, folder.Type);
var folderNode = nodeToUpdateInView as FolderNodeViewModel;
if (folderNode != null)
{
folderNode.SetFolderInfo();
}
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
}
}
}
}
}
// UPDATE / ADDED scenarions
else
{
// UPDATE Scenario
// PROCESS THE SINGLE NODE(S) LISTENER(S) (NodeDetailsPage live updates)
foreach (var node in Nodes)
{
if (megaNode.getBase64Handle() == node.getNodeBase64Handle())
{
Deployment.Current.Dispatcher.BeginInvoke(() => node.updateNode(megaNode));
}
}
// Used in different scenario's
MNode parentNode = api.getParentNode(megaNode);
foreach (var folder in Folders)
{
IMegaNode nodeToUpdateInView = folder.ChildNodes.FirstOrDefault(
node => node.Base64Handle.Equals(megaNode.getBase64Handle()));
// If node is found, process the update action
if (nodeToUpdateInView != null)
{
bool isMoved = !folder.FolderRootNode.Base64Handle.Equals(parentNode.getBase64Handle());
// Is node is move to different folder. Remove from current folder view
if (isMoved)
{
// Needed because we are in a foreach loop to prevent the use of the wrong
// local variable in the dispatcher code.
var currentFolder = folder;
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
currentFolder.ChildNodes.Remove(nodeToUpdateInView);
((FolderNodeViewModel)currentFolder.FolderRootNode).SetFolderInfo();
UpdateFolders(currentFolder);
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
}
// Node is updated with new data. Update node in current view
else
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
nodeToUpdateInView.Update(megaNode, folder.Type);
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
isProcessed = true;
break;
}
}
}
// ADDED scenario
if (parentNode != null && !isProcessed)
{
foreach (var folder in Folders)
{
bool isAddedInFolder = folder.FolderRootNode.Base64Handle.Equals(parentNode.getBase64Handle());
// If node is added in current folder, process the add action
if (isAddedInFolder)
{
// Retrieve the index from the SDK
// Substract -1 to get a valid list index
int insertIndex = api.getIndex(megaNode,
UiService.GetSortOrder(parentNode.getBase64Handle(),
parentNode.getName())) - 1;
// If the insert position is higher than the ChilNodes size insert in the last position
if (insertIndex >= folder.ChildNodes.Count())
{
// Needed because we are in a foreach loop to prevent the use of the wrong
// local variable in the dispatcher code.
var currentFolder = folder;
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
currentFolder.ChildNodes.Add(NodeService.CreateNew(api,
_appInformation, megaNode, currentFolder.Type));
((FolderNodeViewModel)currentFolder.FolderRootNode).SetFolderInfo();
UpdateFolders(currentFolder);
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
}
// Insert the node at a specific position
else
{
// Insert position can never be less then zero
// Replace negative index with first possible index zero
if (insertIndex < 0)
{
insertIndex = 0;
}
// Needed because we are in a foreach loop to prevent the use of the wrong
// local variable in the dispatcher code.
var currentFolder = folder;
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
currentFolder.ChildNodes.Insert(insertIndex,
NodeService.CreateNew(api, _appInformation, megaNode, currentFolder.Type));
((FolderNodeViewModel)currentFolder.FolderRootNode).SetFolderInfo();
UpdateFolders(currentFolder);
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
}
break;
}
// ADDED in subfolder scenario
IMegaNode nodeToUpdateInView = folder.ChildNodes.FirstOrDefault(
node => node.Base64Handle.Equals(parentNode.getBase64Handle()));
if (nodeToUpdateInView != null)
{
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
nodeToUpdateInView.Update(parentNode, folder.Type);
var folderNode = nodeToUpdateInView as FolderNodeViewModel;
if (folderNode != null)
{
folderNode.SetFolderInfo();
}
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
break;
}
// Unconditional scenarios
// Move/delete/add actions in subfolders
var localFolder = folder;
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
try
{
UpdateFolders(localFolder);
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
});
}
}
}
}
}
catch (Exception)
{
// Dummy catch, surpress possible exception
}
}
private async Task <bool> RecursiveDownloadFolder(String downloadPath, NodeViewModel folderNode)
{
if (String.IsNullOrWhiteSpace(folderNode.Name))
{
await new CustomMessageDialog(AppMessages.DownloadNodeFailed_Title,
AppMessages.AM_DownloadNodeFailedNoErrorCode, this.AppInformation).ShowDialogAsync();
return(false);
}
// Check for illegal characters in the folder name
if (FolderService.HasIllegalChars(folderNode.Name))
{
await new CustomMessageDialog(AppMessages.DownloadNodeFailed_Title,
String.Format(AppMessages.InvalidFolderNameOrPath, folderNode.Name),
this.AppInformation).ShowDialogAsync();
return(false);
}
try
{
String newDownloadPath = Path.Combine(downloadPath, folderNode.Name);
if (!await CheckDownloadPath(newDownloadPath))
{
return(false);
}
MNodeList childList = MegaSdk.getChildren(folderNode.OriginalMNode);
bool result = true; // Default value in case that the folder is empty
for (int i = 0; i < childList.size(); i++)
{
// To avoid pass null values to CreateNew
if (childList.get(i) == null)
{
continue;
}
var childNode = NodeService.CreateNew(this.MegaSdk, this.AppInformation, childList.get(i), ContainerType.CloudDrive);
// If node creation failed for some reason, continue with the rest and leave this one
if (childNode == null)
{
continue;
}
bool partialResult;
if (childNode.IsFolder)
{
partialResult = await RecursiveDownloadFolder(newDownloadPath, childNode);
}
else
{
partialResult = await DownloadFile(newDownloadPath, childNode);
}
// Only change the global result if the partial result indicates an error
if (!partialResult)
{
result = partialResult;
}
}
return(result);
}
catch (Exception e)
{
OnUiThread(() =>
{
new CustomMessageDialog(AppMessages.DownloadNodeFailed_Title,
String.Format(AppMessages.DownloadNodeFailed, e.Message),
App.AppInformation).ShowDialog();
});
return(false);
}
}
/// <summary>
/// Gets the incoming shared folders and fills the list.
/// </summary>
public void GetIncomingSharedFolders()
{
// User must be online to perform this operation
if (!IsUserOnline())
{
return;
}
// First cancel any other loading task that is busy
CancelLoad();
// Create the option to cancel
CreateLoadCancelOption();
InShares.SetProgressIndication(true);
// Process is started so we can set the empty content template to loading already
InShares.SetEmptyContentTemplate(true);
MNodeList inSharesList = MegaSdk.getInShares();
if (inSharesList == null)
{
OnUiThread(() =>
{
new CustomMessageDialog(
AppMessages.AM_LoadFailed_Title,
AppMessages.AM_LoadInSharesFailed,
App.AppInformation,
MessageDialogButtons.Ok).ShowDialog();
InShares.SetEmptyContentTemplate(false);
});
return;
}
OnUiThread(() => InShares.ChildNodes.Clear());
Task.Factory.StartNew(() =>
{
try
{
int inSharesListSize = inSharesList.size();
for (int i = 0; i < inSharesListSize; i++)
{
// If the task has been cancelled, stop processing
if (LoadingCancelToken.IsCancellationRequested)
{
LoadingCancelToken.ThrowIfCancellationRequested();
}
MNode inSharedFolder = inSharesList.get(i);
if (inSharedFolder != null)
{
var _inSharedFolder = NodeService.CreateNew(this.MegaSdk, this.AppInformation,
inSharedFolder, ContainerType.InShares, InShares.ChildNodes);
if (_inSharedFolder != null)
{
_inSharedFolder.DefaultImagePathData = VisualResources.FolderTypePath_shared;
OnUiThread(() => InShares.ChildNodes.Add(_inSharedFolder));
}
}
}
OnUiThread(() =>
{
OnPropertyChanged("HasInSharedFolders");
OnPropertyChanged("NumberOfInSharedFolders");
OnPropertyChanged("NumberOfInSharedFoldersText");
});
}
catch (OperationCanceledException)
{
// Do nothing. Just exit this background process because a cancellation exception has been thrown
}
finally
{
// Show the user that processing the childnodes is done
InShares.SetProgressIndication(false);
// Set empty content to folder instead of loading view
InShares.SetEmptyContentTemplate(false);
}
}, LoadingCancelToken, TaskCreationOptions.PreferFairness, TaskScheduler.Current);
}
protected async void GetIncomingSharedItems(MUser contact = null)
{
// User must be online to perform this operation
if (!await IsUserOnlineAsync())
{
return;
}
// First cancel any other loading task that is busy
CancelLoad();
// Create the option to cancel
CreateLoadCancelOption();
// Process is started so we can set the empty content template to loading already
SetEmptyContent(true);
await OnUiThreadAsync(() => this.ItemCollection.Clear());
MNodeList inSharedItems = (contact != null) ?
SdkService.MegaSdk.getInShares(contact) : SdkService.MegaSdk.getInShares();
await Task.Factory.StartNew(() =>
{
try
{
var inSharedItemsListSize = inSharedItems.size();
for (int i = 0; i < inSharedItemsListSize; i++)
{
// If the task has been cancelled, stop processing
if (LoadingCancelToken.IsCancellationRequested)
{
LoadingCancelToken.ThrowIfCancellationRequested();
}
// To avoid null values
if (inSharedItems.get(i) == null)
{
continue;
}
var node = NodeService.CreateNewSharedFolder(SdkService.MegaSdk, App.AppInformation,
inSharedItems.get(i), this);
// If node creation failed for some reason, continue with the rest and leave this one
if (node == null)
{
continue;
}
OnUiThread(() => this.ItemCollection.Items.Add((IMegaSharedFolderNode)node));
}
}
catch (OperationCanceledException)
{
// Do nothing. Just exit this background process because a cancellation exception has been thrown
}
}, LoadingCancelToken, TaskCreationOptions.PreferFairness, TaskScheduler.Current);
this.SortBy(this.CurrentOrder, this.ItemCollection.CurrentOrderDirection);
OnItemCollectionChanged(this, EventArgs.Empty);
SetEmptyContent(false);
}
/// <summary>
/// Load the mega nodes for this specific folder using the Mega SDK
/// </summary>
public void LoadChildNodes()
{
// User must be online to perform this operation
if ((this.Type != ContainerType.FolderLink) && !IsUserOnline())
{
return;
}
// First cancel any other loading task that is busy
CancelLoad();
// FolderRootNode should not be null
if (FolderRootNode == null)
{
OnUiThread(() =>
{
new CustomMessageDialog(
AppMessages.LoadNodesFailed_Title,
AppMessages.LoadNodesFailed,
App.AppInformation,
MessageDialogButtons.Ok).ShowDialog();
});
return;
}
SetProgressIndication(true);
// Process is started so we can set the empty content template to loading already
SetEmptyContentTemplate(true);
// Get the MNodes from the Mega SDK in the correct sorting order for the current folder
MNodeList childList = NodeService.GetChildren(this.MegaSdk, this.FolderRootNode);
if (childList == null)
{
OnUiThread(() =>
{
new CustomMessageDialog(
AppMessages.LoadNodesFailed_Title,
AppMessages.LoadNodesFailed,
App.AppInformation,
MessageDialogButtons.Ok).ShowDialog();
SetEmptyContentTemplate(false);
});
return;
}
// Clear the child nodes to make a fresh start
ClearChildNodes();
// Set the correct view for the main drive. Do this after the childs are cleared to speed things up
SetViewOnLoad();
// Build the bread crumbs. Do this before loading the nodes so that the user can click on home
OnUiThread(BuildBreadCrumbs);
// Create the option to cancel
CreateLoadCancelOption();
// Load and create the childnodes for the folder
Task.Factory.StartNew(() =>
{
try
{
CreateChildren(childList, childList.size());
}
catch (OperationCanceledException)
{
// Do nothing. Just exit this background process because a cancellation exception has been thrown
}
}, LoadingCancelToken, TaskCreationOptions.PreferFairness, TaskScheduler.Current);
}
private void CreateChildren(MNodeList childList, int listSize)
{
// Set the parameters for the performance for the different view types of a folder
int viewportItemCount, backgroundItemCount;
InitializePerformanceParameters(out viewportItemCount, out backgroundItemCount);
// We will not add nodes one by one in the dispatcher but in groups
List <IMegaNode> helperList;
try { helperList = new List <IMegaNode>(1024); }
catch (ArgumentOutOfRangeException) { helperList = new List <IMegaNode>(); }
for (int i = 0; i < listSize; i++)
{
// If the task has been cancelled, stop processing
if (LoadingCancelToken.IsCancellationRequested)
{
LoadingCancelToken.ThrowIfCancellationRequested();
}
// To avoid pass null values to CreateNew
if (childList.get(i) == null)
{
continue;
}
var node = NodeService.CreateNew(this.MegaSdk, this.AppInformation, childList.get(i), this.Type, ChildNodes);
// If node creation failed for some reason, continue with the rest and leave this one
if (node == null)
{
continue;
}
// If the user is moving nodes, check if the node had been selected to move
// and establish the corresponding display mode
if (CurrentDisplayMode == DriveDisplayMode.CopyOrMoveItem)
{
// Check if it is the only focused node
if ((FocusedNode != null) && (node.OriginalMNode.getBase64Handle() == FocusedNode.OriginalMNode.getBase64Handle()))
{
node.DisplayMode = NodeDisplayMode.SelectedForCopyOrMove;
FocusedNode = node;
}
// Check if it is one of the multiple selected nodes
IsSelectedNode(node);
}
helperList.Add(node);
// First add the viewport items to show some data to the user will still loading
if (i == viewportItemCount)
{
var waitHandleViewportNodes = new AutoResetEvent(false);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
// If the task has been cancelled, stop processing
foreach (var megaNode in helperList.TakeWhile(megaNode => !LoadingCancelToken.IsCancellationRequested))
{
ChildNodes.Add(megaNode);
}
waitHandleViewportNodes.Set();
});
waitHandleViewportNodes.WaitOne();
helperList.Clear();
continue;
}
if (helperList.Count != backgroundItemCount || i <= viewportItemCount)
{
continue;
}
// Add the rest of the items in the background to the list
var waitHandleBackgroundNodes = new AutoResetEvent(false);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
// If the task has been cancelled, stop processing
foreach (var megaNode in helperList.TakeWhile(megaNode => !LoadingCancelToken.IsCancellationRequested))
{
ChildNodes.Add(megaNode);
}
waitHandleBackgroundNodes.Set();
});
waitHandleBackgroundNodes.WaitOne();
helperList.Clear();
}
// Add any nodes that are left over
var waitHandleRestNodes = new AutoResetEvent(false);
Deployment.Current.Dispatcher.BeginInvoke(() =>
{
// Show the user that processing the childnodes is done
SetProgressIndication(false);
// Set empty content to folder instead of loading view
SetEmptyContentTemplate(false);
// If the task has been cancelled, stop processing
foreach (var megaNode in helperList.TakeWhile(megaNode => !LoadingCancelToken.IsCancellationRequested))
{
ChildNodes.Add(megaNode);
}
waitHandleRestNodes.Set();
});
waitHandleRestNodes.WaitOne();
OnUiThread(() => OnPropertyChanged("HasChildNodesBinding"));
}
