concat method

@override PromptValue concat(PromptValue other)

Merges this prompt value with another by concatenating the content.

Implementation

@override
PromptValue concat(
  final PromptValue other,
) =>
    switch (other) {
      final StringPromptValue other => ChatPromptValue([
          ...messages,
          ChatMessage.humanText(other.value),
        ]),
      final ChatPromptValue other => ChatPromptValue(
          List.generate(
            max(messages.length, other.messages.length),
            (index) => (
              index < messages.length ? messages[index] : null,
              index < other.messages.length ? other.messages[index] : null,
            ),
          )
              .map((final pair) {
                final (message, otherMessage) = pair;
                if (message == null) {
                  return otherMessage;
                } else if (otherMessage == null) {
                  return message;
                } else {
                  return message.concat(otherMessage);
                }
              })
              .nonNulls
              .toList(growable: false),
        ),
    };