/// <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);
}
}
}