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//-----------------------------------------------------------------------
// <copyright file="ScopeEncoder.cs" company="Outercurve Foundation">
// Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------
namespace DotNetOpenAuth.OAuth2.ChannelElements {
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.Messaging.Reflection;
/// <summary>
/// Encodes or decodes a set of scopes into the OAuth 2.0 scope message part.
/// </summary>
internal class ScopeEncoder : IMessagePartEncoder {
/// <summary>
/// Initializes a new instance of the <see cref="ScopeEncoder"/> class.
/// </summary>
public ScopeEncoder() {
}
/// <summary>
/// Encodes the specified value.
/// </summary>
/// <param name="value">The value. Guaranteed to never be null.</param>
/// <returns>
/// The <paramref name="value"/> in string form, ready for message transport.
/// </returns>
public string Encode(object value) {
var scopes = (IEnumerable<string>)value;
ErrorUtilities.VerifyProtocol(!scopes.Any(scope => scope.Contains(" ")), OAuthStrings.ScopesMayNotContainSpaces);
return (scopes != null && scopes.Any()) ? string.Join(" ", scopes.ToArray()) : null;
}
/// <summary>
/// Decodes the specified value.
/// </summary>
/// <param name="value">The string value carried by the transport. Guaranteed to never be null, although it may be empty.</param>
/// <returns>
/// The deserialized form of the given string.
/// </returns>
/// <exception cref="FormatException">Thrown when the string value given cannot be decoded into the required object type.</exception>
public object Decode(string value) {
return OAuthUtilities.SplitScopes(value);
}
}
}
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