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Added task cancellation to vault list so that search filtering tasks do not stack.

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This commit is contained in:
Kyle Spearrin 2016-08-14 01:42:18 -04:00
parent 2180fb6728
commit ee867df0be
1 changed files with 84 additions and 19 deletions
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103
src/App/Pages/Vault/VaultListSitesPage.cs
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@ -14,6 +14,7 @@ using PushNotification.Plugin.Abstractions;
using Plugin.Settings.Abstractions;
using Plugin.Connectivity.Abstractions;
using System.Collections.Generic;
using System.Threading;
namespace Bit.App.Pages
{
@ -29,6 +30,7 @@ namespace Bit.App.Pages
private readonly ISettings _settings;
private readonly bool _favorites;
private bool _loadExistingData;
private CancellationTokenSource _filterResultsCancellationTokenSource;
public VaultListSitesPage(bool favorites)
: base(true)
@ -62,7 +64,7 @@ namespace Bit.App.Pages
{
if(success)
{
FetchAndLoadVault();
_filterResultsCancellationTokenSource = FetchAndLoadVault();
}
});
@ -106,7 +108,7 @@ namespace Bit.App.Pages
private void SearchBar_SearchButtonPressed(object sender, EventArgs e)
{
FilterResultsBackground(((SearchBar)sender).Text);
_filterResultsCancellationTokenSource = FilterResultsBackground(((SearchBar)sender).Text, _filterResultsCancellationTokenSource);
}
private void SearchBar_TextChanged(object sender, TextChangedEventArgs e)
@ -118,11 +120,12 @@ namespace Bit.App.Pages
return;
}
FilterResultsBackground(e.NewTextValue);
_filterResultsCancellationTokenSource = FilterResultsBackground(e.NewTextValue, _filterResultsCancellationTokenSource);
}
private void FilterResultsBackground(string searchFilter)
private CancellationTokenSource FilterResultsBackground(string searchFilter, CancellationTokenSource previousCts)
{
var cts = new CancellationTokenSource();
Task.Run(async () =>
{
if(!string.IsNullOrWhiteSpace(searchFilter))
@ -132,23 +135,47 @@ namespace Bit.App.Pages
{
return;
}
else
{
previousCts?.Cancel();
}
}
FilterResults(searchFilter);
});
try
{
FilterResults(searchFilter, cts.Token);
}
catch(OperationCanceledException) { }
}, cts.Token);
return cts;
}
private void FilterResults(string searchFilter)
private void FilterResults(string searchFilter, CancellationToken ct)
{
if(ct.IsCancellationRequested)
{
throw new OperationCanceledException(ct);
}
if(string.IsNullOrWhiteSpace(searchFilter))
{
LoadFolders(Sites);
LoadFolders(Sites, ct);
}
else
{
searchFilter = searchFilter.ToLower();
var filteredSites = Sites.Where(s => s.Name.ToLower().Contains(searchFilter) || s.Username.ToLower().Contains(searchFilter));
LoadFolders(filteredSites);
var filteredSites = Sites
.Where(s => s.Name.ToLower().Contains(searchFilter) || s.Username.ToLower().Contains(searchFilter))
.TakeWhile(s => !ct.IsCancellationRequested)
.ToList();
if(ct.IsCancellationRequested)
{
throw new OperationCanceledException(ct);
}
LoadFolders(filteredSites, ct);
}
}
@ -157,7 +184,7 @@ namespace Bit.App.Pages
base.OnAppearing();
if(_loadExistingData)
{
FetchAndLoadVault();
_filterResultsCancellationTokenSource = FetchAndLoadVault();
}
if(_connectivity.IsConnected && Device.OS == TargetPlatform.iOS && !_favorites)
@ -192,14 +219,15 @@ namespace Bit.App.Pages
}
}
private void FetchAndLoadVault()
private CancellationTokenSource FetchAndLoadVault()
{
var cts = new CancellationTokenSource();
_settings.AddOrUpdateValue(Constants.FirstVaultLoad, false);
_loadExistingData = true;
if(PresentationFolders.Count > 0 && _syncService.SyncInProgress)
{
return;
return cts;
}
Task.Run(async () =>
@ -214,11 +242,17 @@ namespace Bit.App.Pages
Folders = folders.Select(f => new VaultListPageModel.Folder(f)).OrderBy(s => s.Name);
Sites = sites.Select(s => new VaultListPageModel.Site(s)).OrderBy(s => s.Name).ThenBy(s => s.Username);
FilterResults(Search.Text);
});
try
{
FilterResults(Search.Text, cts.Token);
}
catch(OperationCanceledException) { }
}, cts.Token);
return cts;
}
private void LoadFolders(IEnumerable<VaultListPageModel.Site> sites)
private void LoadFolders(IEnumerable<VaultListPageModel.Site> sites, CancellationToken ct)
{
var folders = new List<VaultListPageModel.Folder>(Folders);
@ -228,13 +262,44 @@ namespace Bit.App.Pages
{
folder.Clear();
}
folder.AddRange(sites.Where(s => s.FolderId == folder.Id));
var sitesToAdd = sites
.Where(s => s.FolderId == folder.Id)
.TakeWhile(s => !ct.IsCancellationRequested)
.ToList();
if(ct.IsCancellationRequested)
{
throw new OperationCanceledException(ct);
}
folder.AddRange(sitesToAdd);
}
var noneFolder = new VaultListPageModel.Folder(sites.Where(s => s.FolderId == null));
var noneToAdd = sites
.Where(s => s.FolderId == null)
.TakeWhile(s => !ct.IsCancellationRequested)
.ToList();
if(ct.IsCancellationRequested)
{
throw new OperationCanceledException(ct);
}
var noneFolder = new VaultListPageModel.Folder(noneToAdd);
folders.Add(noneFolder);
PresentationFolders.ResetWithRange(folders.Where(f => f.Any()));
var foldersToAdd = folders
.Where(f => f.Any())
.TakeWhile(s => !ct.IsCancellationRequested)
.ToList();
if(ct.IsCancellationRequested)
{
throw new OperationCanceledException(ct);
}
PresentationFolders.ResetWithRange(foldersToAdd);
}
private void SiteSelected(object sender, SelectedItemChangedEventArgs e)