This function generates a callback function that processes streaming responses
from different language model APIs. The callback function is specific to the
API provided (claude, ollama, "mistral", or openai) and processes incoming data streams,
printing the content to the console and updating a global environment for further use.
generate_callback_function(.api)A function that serves as a callback to handle streaming responses
from the specified API. The callback function processes the raw data, updates
the .tidyllm_stream_env$stream object, and prints the streamed content to the console.
The function returns TRUE if streaming should continue, and FALSE when
streaming is finished.
A character string indicating the API type. Supported values are
"claude", "ollama", "mistral", "groq" and "openai".
For Claude API: The function processes event and data lines, and handles the message_start
and message_stop events to control streaming flow.
For Ollama API: The function directly parses the stream content as JSON and extracts the
message$content field.
For OpenAI, Mistral and Groq: The function handles JSON data streams and processes content deltas.
It stops processing when the [DONE] message is encountered.