Function convertMessages

sdk/src/impl/chatgpt-backend-fetch.ts:88–144

(
  messages: ChatCompletionsMessage[],
)

}

function convertMessages(
  messages: ChatCompletionsMessage[],
): unknown[] {
  const input: unknown[] = []

  for (const msg of messages) {
    switch (msg.role) {
      case 'system': {
        // System messages are extracted to top-level `instructions` field;
        // if any slip through, convert to developer role
        if (msg.content) {
          input.push({ type: 'message', role: 'developer', content: msg.content })
        }
        break
      }

      case 'user': {
        const content = convertUserContentParts(msg.content)
        if (content) {
          input.push({ type: 'message', role: 'user', content })
        }
        break
      }

      case 'assistant': {
        if (msg.content) {
          input.push({ type: 'message', role: 'assistant', content: msg.content })
        }
        if (msg.tool_calls) {
          for (const tc of msg.tool_calls) {
            input.push({
              type: 'function_call',
              call_id: tc.id,
              name: tc.function.name,
              arguments: tc.function.arguments,
            })
          }
        }
        break
      }

      case 'tool': {
        input.push({
          type: 'function_call_output',
          call_id: msg.tool_call_id ?? 'unknown',
          output:
            typeof msg.content === 'string'
              ? msg.content
              : JSON.stringify(msg.content),
        })
        break
      }
    }
  }

  return input
}