/// <summary>
/// Executes a Drive request.
/// </summary>
/// <typeparam name="T">The requested data type.</typeparam>
/// <param name="request">The request.</param>
/// <returns>A response.</returns>
public DriveResponse <T> Execute <T>(IDriveRequest <T> request) where T : IDriveData, new()
{
Log.Debug("Execute.");
DriveResponse <T> result = null;
RequestErrorAction errorAction;
do
{
try
{
result = request.Execute(this);
break;
}
catch (InteractionException exception)
{
Log.TraceException("Execute. Exception", exception);
errorAction = RaiseRequestError(exception, RequestErrorAction.Alert);
Log.Trace("Execute. NextAction: \"{0}\"", errorAction);
if (errorAction == RequestErrorAction.Alert)
{
throw;
}
}
} while (errorAction == RequestErrorAction.Retry);
return(result);
}
public async Task <TResponse> Handle(IDriveRequest request, CancellationToken cancellationToken,
RequestHandlerDelegate <TResponse> next)
{
var storageOptions = _serviceProvider.GetRequiredService <StorageOptions>();
Directory.CreateDirectory(storageOptions.StorageFolder);
return(await next());
}
/// <summary>
/// Gets body objects of a REST request.
/// </summary>
/// <typeparam name="T">The type of a retrieved data object.</typeparam>
/// <param name="request">The Google Drive request.</param>
/// <returns>REST request parameters.</returns>
internal static IEnumerable <object> GetBodyObjects <T>(IDriveRequest <T> request) where T : IDriveData, new()
{
var attrType = typeof(RestBodyAttribute);
var properties = request.GetType().GetProperties()
.Where(p => p.IsDefined(attrType, false))
.Select(p => new { Property = p, Attr = p.GetCustomAttributes(attrType, false).OfType <RestBodyAttribute>().FirstOrDefault() })
.Where(x => x.Attr != null);
return(from propertyDef in properties
let value = propertyDef.Property.GetValue(request, null)
where value != null
select value);
}
/// <summary>
/// Gets parameters for a REST request from a Google Drive request.
/// </summary>
/// <typeparam name="T">The type of a retrieved data object.</typeparam>
/// <param name="request">The Google Drive request.</param>
/// <returns>REST request parameters.</returns>
internal static IEnumerable <Parameter> GetParameters <T>(IDriveRequest <T> request) where T : IDriveData, new()
{
var attrType = typeof(RestParameterAttribute);
var properties = request.GetType().GetProperties()
.Where(p => p.IsDefined(attrType, false))
.Select(p => new { Property = p, Attr = p.GetCustomAttributes(attrType, false).OfType <RestParameterAttribute>().FirstOrDefault() })
.Where(x => x.Attr != null);
foreach (var property in properties)
{
string strValue;
if (property.Property.PropertyType.IsEnum)
{
var eVal = property.Property.GetValue(request, null) as Enum;
strValue = eVal != null?eVal.GetStringValue(eVal.ToString()) : null;
}
else
{
var objVal = property.Property.GetValue(request, null);
strValue = objVal != null
? (objVal is string?(string)objVal : objVal.ToString())
: null;
}
if (!string.IsNullOrEmpty(strValue))
{
var item = new Parameter
{
Name = property.Attr.ParameterName,
Type = property.Attr.ParameterType,
Value = strValue
};
yield return(item);
}
}
}
/// <summary>
/// IDriveRequest extension method that takes in a handler for the response.
/// </summary>
/// <param name="request">Request to send out</param>
/// <param name="responseHandler">Handler for the response</param>
/// <returns></returns>
public static void SendGet(this IDriveRequest request, ResponseHandler responseHandler)
{
SendGet <Drive>(request, responseHandler);
}
/// <summary>
/// Creates a REST request with Drive API version parameter.
/// </summary>
/// <typeparam name="T">The type of a retrieved data object.</typeparam>
/// <param name="resource">The request location.</param>
/// <param name="method">The request method.</param>
/// <param name="driveRequest">The Drive reqiest.</param>
/// <param name="hasBody">The whether if drive request has body.</param>
/// <returns>A REST request.</returns>
internal static IRestRequest CreateRestRequest <T>(string resource, Method method, IDriveRequest <T> driveRequest, bool hasBody = false)
where T : IDriveData, new()
{
object bodyObject;
if (hasBody)
{
bodyObject = RestParametersHelper.GetBodyObjects(driveRequest).FirstOrDefault();
if (bodyObject == null)
{
throw new InvalidOperationException(LocalStrings.RequestBodyNullReferenceErrorMessage);
}
}
else
{
bodyObject = null;
}
var result = CreateRestRequest(resource, method, RestParametersHelper.GetParameters(driveRequest));
if (hasBody)
{
result.AddBody(bodyObject);
}
return(result);
}
