public FingerprintService(IObservable <Unit> applicationActivated, FuncAsync <string> description, IScheduler dispatcher, IScheduler backgroundScheduler, bool fallbackOnPasscodeAuthentication = false)
{
applicationActivated.Validation().NotNull(nameof(applicationActivated));
description.Validation().NotNull(nameof(description));
dispatcher.Validation().NotNull(nameof(dispatcher));
backgroundScheduler.Validation().NotNull(nameof(backgroundScheduler));
_description = description;
_dispatcher = dispatcher;
_asyncLock = new AsyncLock();
_isSupported =
applicationActivated
.ObserveOn(backgroundScheduler)
.StartWith(backgroundScheduler, Unit.Default)
.Select(_ => CheckSupport())
.Replay(1, backgroundScheduler)
.RefCount();
_isEnabled =
_isSupported
.Select(isSupported => isSupported && CheckEnrollment())
.Replay(1, backgroundScheduler)
.RefCount();
_fallbackOnPasscodeAuthentication = fallbackOnPasscodeAuthentication;
}
public FingerprintService(
FragmentActivity fragmentActivity,
Context applicationContext,
IObservable <Unit> applicationActivated,
CoreDispatcher dispatcher,
IScheduler backgroundScheduler,
FuncAsync <BiometricPrompt.PromptInfo> promptInfoBuilder)
{
fragmentActivity.Validation().NotNull(nameof(fragmentActivity));
applicationActivated.Validation().NotNull(nameof(applicationActivated));
backgroundScheduler.Validation().NotNull(nameof(backgroundScheduler));
_dispatcher = dispatcher ?? throw new ArgumentNullException(nameof(dispatcher));
_promptInfoBuilder = promptInfoBuilder ?? throw new ArgumentNullException(nameof(promptInfoBuilder));
var executor = ContextCompat.GetMainExecutor(applicationContext);
var callback = new AuthenticationCallback(OnAuthenticationSucceeded, OnAuthenticationFailed, OnAuthenticationError);
_BiometricPrompt = new BiometricPrompt(fragmentActivity, executor, callback);
_BiometricManager = BiometricManager.From(Application.Context);
_keyStore = KeyStore.GetInstance(ANDROID_KEYSTORE);
_keyStore.Load(null);
_canAuthenticate =
applicationActivated
.ObserveOn(backgroundScheduler)
.StartWith(backgroundScheduler, Unit.Default)
.Select(_ => _BiometricManager.CanAuthenticate())
.Replay(1, backgroundScheduler)
.RefCount();
}
/// <summary>
/// Комманда которая аттачится к ViewModel.IsBusy - если модель занята, то
/// любая другая команда, кроме SimpleCommand не сработает.
/// После того как команда выполнится, то IsBusy автоматически становится false,
/// давая возможность другим командам выполняться
/// </summary>
/// <param name="vm">ViewModel которая будет блокироваться после нажатия</param>
/// <param name="function">Действие которое будет выполнено</param>
public LockCommand(BaseViewModel vm, FuncAsync function, bool isBusy = false)
{
viewModel = vm ?? throw new Exception("ViewModel не должна быть null");
isCommandCanBlocked = isBusy;
if (isCommandCanBlocked)
{
func = async(arg) =>
{
await function();
vm.IsBusy = false;
}
}
;
else
{
func = async(arg) =>
{
await function();
isEnable = true;
if (CanExecuteChanged != null)
{
CanExecuteChanged.Invoke(this, new EventArgs());
}
}
};
}
/// <summary>
/// Initializes a new instance of the <see cref="BiometryService" /> class.
/// </summary>
/// <param name="options">The <see cref="BiometryOptions" /> instance to use.</param>
/// <param name="description">An enum of LAPolicy.</param>
/// <param name="localAuthenticationPolicy">The <see cref="LAPolicy" /> to use.</param>
public BiometryService(BiometryOptions options, FuncAsync <string> description, LAPolicy localAuthenticationPolicy = LAPolicy.DeviceOwnerAuthentication)
{
_options = options ?? new BiometryOptions();
_description = description;
_localAuthenticationPolicy = localAuthenticationPolicy;
}
/// <summary>
/// Prevents parallel execution of the FuncAsync
/// </summary>
/// <param name="func">Func to lock</param>
/// <param name="mode">Mode to use for locking</param>
/// <returns>A FuncAsync which cannot have nmultiple instance running at a same time</returns>
public static FuncAsync <TResult> LockInvocation <TResult>(this FuncAsync <TResult> func, InvocationLockingMode mode = InvocationLockingMode.Share)
{
// Note: Do not use TaskCompletionSource, for strange reasons it cause app crashes on iOS (on SetException).
// Prefer keep task by themselves instead of trying to replicate task state to a TaskCompletionSource.
if (mode == InvocationLockingMode.Share)
{
var gate = new object();
var pending = default(Task <TResult>);
return(async ct =>
{
var created = false;
try
{
var task = pending;
if (task == null)
{
lock (gate)
{
task = pending;
if (task == null)
{
created = true;
task = pending = func(ct);
}
}
}
return await task;
}
finally
{
// Note: Keep trace of the creation and let to the initiator the responsibility to removed the task from pendings
// DO NOT auto remove at the end of the task itself: If the task run synchronously, we might TryRemove the task before it is actually added to the pendings.
if (created)
{
pending = null;
}
}
});
}
else
{
var gate = new AsyncLock();
return(async ct =>
{
using (await gate.LockAsync(ct))
{
return await func(ct);
}
});
}
}
/// <summary>
/// Invoke the <paramref name="func"/> if not null.
/// </summary>
/// <param name="func">Func to invoke</param>
/// <param name="ct">A CanellationToken</param>
/// <param name="param">Parameter of func</param>
/// <returns>The result of func, or default(TResult) if the func was null.</returns>
public static async Task <TResult> SafeInvoke <TParam, TResult>(this FuncAsync <TParam, TResult> func, CancellationToken ct, TParam param)
{
if (func == null)
{
return(default(TResult));
}
else
{
return(await func(ct, param));
}
}
/// <summary>
/// Prevents parallel execution of the FuncAsync for a SAME PARAMETER
/// </summary>
/// <param name="func">Func to lock</param>
/// <param name="mode">Mode to use for locking FOR A SAME PARAMETER</param>
/// <returns>A FuncAsync which cannot have nmultiple instance running at a same time</returns>
public static FuncAsync <TParam, TResult> LockInvocation <TParam, TResult>(this FuncAsync <TParam, TResult> func, InvocationLockingMode mode = InvocationLockingMode.Share)
where TParam : class
{
// Note: Do not use TaskCompletionSource, for strange reasons it cause app crashes on iOS (on SetException).
// Prefer keep task by themselves instead of trying to replicate task state to a TaskCompletionSource.
if (mode == InvocationLockingMode.Share)
{
#if HAS_NO_CONCURRENT_DICT
var pendings = new SynchronizedDictionary <TParam, Task <TResult> >();
#else
var pendings = new System.Collections.Concurrent.ConcurrentDictionary <TParam, Task <TResult> >();
#endif
return(async(ct, param) =>
{
var created = false;
try
{
return await pendings.GetOrAdd(param, p =>
{
created = true;
return func(ct, p);
});
}
finally
{
// Note: Keep trace of the creation and let to the initiator the responsibility to removed the task from pendings
// DO NOT auto remove at the end of the task itself: If the task run synchronously, we might TryRemove the task before it is actually added to the pendings.
if (created)
{
Task <TResult> _;
pendings.TryRemove(param, out _);
}
}
});
}
else
{
var gates = new ConditionalWeakTable <TParam, AsyncLock>();
return(async(ct, param) =>
{
var gate = gates.GetValue(param, _ => new AsyncLock());
using (await gate.LockAsync(ct))
{
return await func(ct, param);
}
});
}
}
/// <summary>
/// Constructor using an <see cref="IObjectSerializer"/> for persistence.
/// </summary>
public LockedFileDataPersister(
string fullFilename,
IObjectSerializer serializer,
int numberOfRetries = 3,
int retryDelay = 100)
{
_committedFile = new FileInfo(fullFilename /*.Validation().NotNull(nameof(fullFilename))*/).FullName;
_read = async(ct, stream) => (T)serializer.FromStream(stream, typeof(T));
_write = async(ct, entity, stream) => serializer.WriteToStream(entity, typeof(T), stream, canDisposeStream: true);
_numberOfRetries = numberOfRetries;
_retryDelay = retryDelay;
// Create other working file names
_oldFile = _committedFile + ".old";
_newFile = _committedFile + ".new";
_lockFile = _committedFile + ".lck";
}
private async Task <TResult> BuildTaskAsync(FuncAsync <AsyncOperation <TResult>, TResult> taskBuilder)
{
Status = AsyncStatus.Started;
try
{
var result = await taskBuilder(_cts.Token, this);
Status = AsyncStatus.Completed;
return(result);
}
catch (Exception e)
{
ErrorCode = e;
Status = AsyncStatus.Error;
throw;
}
}
/// <summary>
/// Constructor with callbacks for read & write operations.
/// </summary>
public LockedFileDataPersister(
string fullFilename,
FuncAsync <Stream, T> read,
ActionAsync <T, Stream> write,
int numberOfRetries = 3,
int retryDelay = 100)
{
_committedFile = new FileInfo(fullFilename /*.Validation().NotNull(nameof(fullFilename))*/).FullName;
_read = read;
_write = write;
_numberOfRetries = numberOfRetries;
_retryDelay = retryDelay;
// Create other working file names
_oldFile = _committedFile + ".old";
_newFile = _committedFile + ".new";
_lockFile = _committedFile + ".lck";
}
/// <summary>
/// Initializes a new instance of the <see cref="BiometryService" /> class.
/// </summary>
/// <param name="fragmentActivity"></param>
/// <param name="dispatcher"></param>
/// <param name="promptInfoBuilder"></param>
/// <param name="authenticators"></param>
public BiometryService(
FragmentActivity fragmentActivity,
CoreDispatcher dispatcher,
FuncAsync <BiometricPrompt.PromptInfo> promptInfoBuilder)
{
fragmentActivity.Validation().NotNull(nameof(fragmentActivity));
_dispatcher = dispatcher ?? throw new ArgumentNullException(nameof(dispatcher));
_promptInfoBuilder = promptInfoBuilder ?? throw new ArgumentNullException(nameof(promptInfoBuilder));
_applicationContext = Application.Context;
var executor = ContextCompat.GetMainExecutor(_applicationContext);
var callback = new AuthenticationCallback(OnAuthenticationSucceeded, OnAuthenticationFailed, OnAuthenticationError);
_biometricPrompt = new BiometricPrompt(fragmentActivity, executor, callback);
_biometricManager = BiometricManager.From(_applicationContext);
_keyStore = KeyStore.GetInstance(ANDROID_KEYSTORE);
_keyStore.Load(null);
}
/// <summary>
/// Creates a parameter-less memoizer for the the specified task provider. The task provider is guaranteed to be executed only once.
/// </summary>
/// <typeparam name="T">The return value type</typeparam>
/// <param name="func">A function that will call the create the task.</param>
/// <returns>A function that will return a task </returns>
public static FuncAsync <T> AsMemoized <T>(this FuncAsync <T> func)
{
Task <T> value = null;
object gate = new object();
return(ct =>
{
if (value == null)
{
lock (gate)
{
if (value == null)
{
value = Funcs.Create(async ct2 =>
{
try
{
return await func(ct2);
}
catch (OperationCanceledException)
{
lock (gate)
{
value = null;
}
throw;
}
})(ct);
}
}
}
return value;
});
}
/// <summary>
/// Creates a memoizer with one parameter for the the specified task provider. The task provider is guaranteed to be executed only once per parameter instance.
/// </summary>
/// <typeparam name="TResult">The return value type</typeparam>
/// <typeparam name="TParam"></typeparam>
/// <param name="func">A function that will call the create the task.</param>
/// <returns>A function that will return a task </returns>
public static FuncAsync <TParam, TResult> AsMemoized <TParam, TResult>(this FuncAsync <TParam, TResult> func)
{
#if HAS_NO_CONCURRENT_DICT
var values = new SynchronizedDictionary <TParam, FuncAsync <TResult> >();
#else
var values = new System.Collections.Concurrent.ConcurrentDictionary <TParam, FuncAsync <TResult> >();
#endif
// It's safe to use default(TParam) as this won't get called anyway if TParam is a value type.
var nullValue = Funcs.CreateAsyncMemoized(ct => func(ct, default(TParam)));
return((ct, param) =>
{
if (param == null)
{
return nullValue(ct);
}
else
{
var memoizedFunc = values.GetOrAdd(param, p => Funcs.CreateAsyncMemoized(c => func(c, p)));
return memoizedFunc(ct);
}
});
}
internal void SetDataProvider(string formatId, FuncAsync <object> delayRenderer)
{
SetData(formatId, new DataProviderHandler(SetDataCore));
async void SetDataCore(DataProviderRequest request)
{
var deferral = request.GetDeferral();
try
{
var data = await delayRenderer(request.CancellationToken);
request.SetData(data);
}
catch (Exception e)
{
this.Log().Error($"Failed to asynchronously retrieve the data for od '{formatId}'", e);
}
finally
{
deferral.Complete();
}
}
}
internal static void Initialize(FuncAsync <string, bool> getter, FuncAsync <string, bool> checkPermission)
{
_tryGetPermission = getter;
_checkPermission = checkPermission;
}
public static AsyncOperationWithProgress <TResult, TProgress> FromFuncAsync <TResult, TProgress>(FuncAsync <AsyncOperationWithProgress <TResult, TProgress>, TResult> builder) => new AsyncOperationWithProgress <TResult, TProgress>(builder);
CurryLast <T1, T2, T3, TResult>(this FuncAsync <T1, T2, T3, TResult> func, T3 last)
{
return((CancellationToken ct, T1 first, T2 second) => func(ct, first, second, last));
}
CurryFirst <T1, T2, TResult>(this FuncAsync <T1, T2, TResult> func, T1 first)
{
return((CancellationToken ct, T2 last) => func(ct, first, last));
}
Curry <T, TResult>(this FuncAsync <T, TResult> func, T value)
{
return(ct => func(ct, value));
}
/// <summary>
/// Creates a parameterless memoized task providing function. <seealso cref="Uno.Extensions.FuncMemoizeExtensions"/>
/// </summary>
/// <typeparam name="TResult">The returned type</typeparam>
/// <param name="function">The source function</param>
/// <returns>A function</returns>
public static FuncAsync <TParam, TResult> CreateAsyncMemoized <TParam, TResult>(FuncAsync <TParam, TResult> function)
{
return(function.AsMemoized());
}
/// <summary>
/// Creates a parameterized cancellable async function.
/// </summary>
/// <typeparam name="TResult">The returned type</typeparam>
/// <param name="function">The source function</param>
/// <returns>A function</returns>
public static FuncAsync <TParam1, TParam2, TResult> CreateAsync <TParam1, TParam2, TResult>(FuncAsync <TParam1, TParam2, TResult> function)
{
return(function);
}
public AsyncOperation(FuncAsync <AsyncOperation <TResult>, TResult> taskBuilder)
{
Task = BuildTaskAsync(taskBuilder);
}
public static AsyncOperation <TResult> FromTask(FuncAsync <AsyncOperation <TResult>, TResult> builder) => new AsyncOperation <TResult>(builder);
public AsyncOperationWithProgress(FuncAsync <AsyncOperationWithProgress <TResult, TProgress>, TResult> taskBuilder)
: base(Wrap(taskBuilder))
{
}
