/// <summary>
/// Read the ToDoItemId from the stream and consume to the end of the payload.
/// </summary>
/// <param name="streamReader">The reader from which to read the id.</param>
/// <returns>The ID read from the payload.</returns>
public static Guid ReadToDoItemId(ref Utf8JsonStreamReader streamReader)
{
if (streamReader.TokenType != JsonTokenType.StartObject)
{
throw new JsonException("Expected to be at the start of the event payload.");
}
// Read the ID
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.PropertyName || !streamReader.Match(IdPropertyString))
{
throw new JsonException($"Expected to find the {IdPropertyString}.");
}
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.String)
{
throw new JsonException("Expected to find a string-encoded GUID property.");
}
Guid id = streamReader.GetGuid();
// Read to the end of the object
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.EndObject)
{
throw new JsonException("Expected to be at the end of the event payload.");
}
return(id);
}
/// <summary>
/// Read the start date from the stream and consume to the end of the payload.
/// </summary>
/// <param name="streamReader">The reader from which to read the start date.</param>
/// <returns>The start date read from the payload.</returns>
public static DateTimeOffset ReadStartDate(ref Utf8JsonStreamReader streamReader)
{
if (streamReader.TokenType != JsonTokenType.StartObject)
{
throw new JsonException("Expected to be at the start of the event payload.");
}
// Read the ID
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.PropertyName || !streamReader.Match(StartDatePropertyString))
{
throw new JsonException($"Expected to find the {StartDatePropertyString}.");
}
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.String)
{
throw new JsonException("Expected to find a string-encoded DateTimeOffset property.");
}
DateTimeOffset startDate = streamReader.GetDateTimeOffset();
// Read to the end of the object
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.EndObject)
{
throw new JsonException("Expected to be at the end of the event payload.");
}
return(startDate);
}
/// <summary>
/// Read the owner from the stream and consume to the end of the payload.
/// </summary>
/// <param name="streamReader">The reader from which to read the id.</param>
/// <returns>The ID read from the payload.</returns>
public static string ReadOwner(ref Utf8JsonStreamReader streamReader)
{
if (streamReader.TokenType != JsonTokenType.StartObject)
{
throw new JsonException("Expected to be at the start of the event payload.");
}
// Read the ID
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.PropertyName || !streamReader.Match(OwnerPropertyString))
{
throw new JsonException($"Expected to find the {OwnerPropertyString}.");
}
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.String)
{
throw new JsonException("Expected to find a string property.");
}
string owner = streamReader.GetString() ?? throw new JsonException("Expected to find an owner.");
// Read to the end of the object
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.EndObject)
{
throw new JsonException("Expected to be at the end of the event payload.");
}
return(owner);
}
/// <summary>
/// Find the value of the payload property in the event.
/// </summary>
/// <param name="streamReader">The <see cref="Utf8JsonStreamReader"/> from which we are reading the event.</param>
public static void FindPayload(ref Utf8JsonStreamReader streamReader)
{
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.PropertyName || !streamReader.Match(EventPayloadPropertyNameString))
{
throw new JsonException($"Expected to find the {EventPayloadPropertyNameString} property.");
}
// position at the start of the payload
streamReader.Read();
}
private static bool FindDocumentsProperty(ref Utf8JsonStreamReader streamReader)
{
while (streamReader.TokenType != JsonTokenType.PropertyName || !streamReader.Match(DocumentsName))
{
if (!streamReader.Read())
{
return(false);
}
}
return(true);
}
/// <summary>
/// Find the event type value in the stream reader.
/// </summary>
/// <param name="streamReader">The stream reader in which to find the event type.</param>
public static void FindEventType(ref Utf8JsonStreamReader streamReader)
{
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.PropertyName || !streamReader.Match(EventTypePropertyNameString))
{
throw new JsonException($"Expected to find the {EventTypePropertyNameString} property.");
}
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.String)
{
throw new JsonException($"Expected the {EventTypePropertyNameString} property to be a string.");
}
}
/// <summary>
/// Read the event sequence number from the <see cref="Utf8JsonStreamReader"/>.
/// </summary>
/// <param name="streamReader">The stream reader from which to read the event sequence number.</param>
/// <returns>The event sequence number.</returns>
public static long ReadEventSequenceNumber(ref Utf8JsonStreamReader streamReader)
{
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.PropertyName || !streamReader.Match(EventSequenceNumberPropertyNameString))
{
throw new JsonException($"Expected to find the {EventSequenceNumberPropertyNameString} property.");
}
streamReader.Read();
if (streamReader.TokenType != JsonTokenType.Number)
{
throw new JsonException($"Expected the {EventSequenceNumberPropertyNameString} property to be a number.");
}
return(streamReader.GetInt64());
}
