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fnord lib ai response.ex
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lib/ai/response.ex

defmodule AI.Response do
def get(ai, opts) do
with {:ok, max_tokens} <- Keyword.fetch(opts, :max_tokens),
{:ok, model} <- Keyword.fetch(opts, :model),
{:ok, system} <- Keyword.fetch(opts, :system),
{:ok, user} <- Keyword.fetch(opts, :user) do
tools = Keyword.get(opts, :tools, nil)
on_event = Keyword.get(opts, :on_event, fn _, _ -> :ok end)
%{
ai: ai,
opts: Enum.into(opts, %{}),
max_tokens: max_tokens,
model: model,
tools: tools,
on_event: on_event,
messages: [AI.Util.system_msg(system), AI.Util.user_msg(user)],
tool_call_requests: [],
response: nil
}
|> send_request()
|> then(fn state ->
{:ok, state.response, context_window_usage(state)}
end)
end
end
defp context_window_usage(%{messages: msgs, max_tokens: max_tokens}) do
tokens = msgs |> inspect() |> Gpt3Tokenizer.encode() |> length()
pct = tokens / max_tokens * 100.0
pct_str = Number.Percentage.number_to_percentage(pct, precision: 2)
tokens_str = Number.Delimit.number_to_delimited(tokens, precision: 0)
max_tokens_str = Number.Delimit.number_to_delimited(max_tokens, precision: 0)
{"Context window usage", "#{pct_str} | #{tokens_str} / #{max_tokens_str}"}
end
# -----------------------------------------------------------------------------
# Response handling
# -----------------------------------------------------------------------------
defp send_request(state) do
AI.get_completion(state.ai, state.model, state.messages, state.tools)
|> handle_response(state)
end
defp handle_response({:ok, :msg, response}, state) do
%{state | response: response}
end
defp handle_response({:ok, :tool, tool_calls}, state) do
%{state | tool_call_requests: tool_calls}
|> handle_tool_calls()
|> send_request()
end
defp handle_response({:error, reason}, state) do
%{
state
| response: """
I encountered an error while processing your request. Please try again.
The error message was:
#{reason}
"""
}
end
# -----------------------------------------------------------------------------
# Tool calls
# -----------------------------------------------------------------------------
defp handle_tool_calls(%{tool_call_requests: tool_calls} = state) do
{:ok, queue} = Queue.start_link(&handle_tool_call(state, &1))
outputs =
tool_calls
|> Queue.map(queue)
|> Enum.flat_map(fn {:ok, msgs} -> msgs end)
Queue.shutdown(queue)
Queue.join(queue)
%{
state
| tool_call_requests: [],
messages: state.messages ++ outputs
}
end
def handle_tool_call(state, %{id: id, function: %{name: func, arguments: args_json}}) do
request = AI.Util.assistant_tool_msg(id, func, args_json)
UI.debug("TOOL CALL ID=#{id} FUNC=#{func} ARGS=#{args_json}")
with {:ok, output} <- perform_tool_call(state, func, args_json) do
response = AI.Util.tool_msg(id, func, output)
{:ok, [request, response]}
else
{:error, reason} ->
state.on_event.(:tool_call_error, {func, args_json, reason})
response = AI.Util.tool_msg(id, func, reason)
{:ok, [request, response]}
end
end
# -----------------------------------------------------------------------------
# Tool call outputs
# -----------------------------------------------------------------------------
defp perform_tool_call(state, func, args_json) when is_binary(args_json) do
with {:ok, args} <- Jason.decode(args_json) do
state.on_event.(:tool_call, {func, args})
perform_tool_call(state, func, args)
end
end
defp perform_tool_call(state, "search_tool", args) do
AI.Tools.Search.call(state, args)
end
defp perform_tool_call(state, "list_files_tool", args) do
AI.Tools.ListFiles.call(state, args)
end
defp perform_tool_call(state, "file_info_tool", args) do
AI.Tools.FileInfo.call(state, args)
end
defp perform_tool_call(state, "spelunker_tool", args) do
AI.Tools.Spelunker.call(state, args)
end
defp perform_tool_call(state, "git_pickaxe_tool", args) do
AI.Tools.GitPickaxe.call(state, args)
end
defp perform_tool_call(state, "git_show_tool", args) do
AI.Tools.GitShow.call(state, args)
end
defp perform_tool_call(state, "outline_tool", args) do
AI.Tools.Outline.call(state, args)
end
defp perform_tool_call(_state, func, _args) do
{:error, :unhandled_tool_call, func}
end
end