kcode-k1-chat-codex-codec 0.5.0

#![forbid(unsafe_code)]

use kcode_k1_chat_chatend::{ChatBox, ProviderCall};
use serde_json::Value;

const KTOOL_VERSION: &str = "1.0.0";

#[derive(Clone, Debug, PartialEq)]
pub enum BoxValue {
    History(String),
    Call(Result<ProviderCall, String>),
}

#[derive(Default)]
pub struct Codec;

impl kcode_k1_codex_adapter::BoxCodec for Codec {
    type Box = BoxValue;

    fn tool_call_box(&mut self, call: &kcode_k1_codex_adapter::ToolCall) -> Self::Box {
        if call.name != "call_ktool" {
            return BoxValue::Call(Err("tool name must be call_ktool".into()));
        }
        let Value::String(wrapper) = &call.arguments else {
            return BoxValue::Call(Err("tool arguments must be a JSON string".into()));
        };
        let wrapper: Value = match serde_json::from_str(wrapper) {
            Ok(wrapper) => wrapper,
            Err(_) => return BoxValue::Call(Err("tool arguments must be valid JSON".into())),
        };
        let Value::Object(values) = wrapper else {
            return BoxValue::Call(Err("tool arguments must be an object".into()));
        };
        if values.len() != 2 || !values.contains_key("name") || !values.contains_key("arguments") {
            return BoxValue::Call(Err("tool arguments must have name and arguments".into()));
        }
        let Some(Value::String(tool)) = values.get("name") else {
            return BoxValue::Call(Err("tool arguments name must be a string".into()));
        };
        let Some(Value::Object(arguments)) = values.get("arguments") else {
            return BoxValue::Call(Err("tool arguments must be an object".into()));
        };
        if arguments.contains_key("tool") {
            return BoxValue::Call(Err("tool arguments may not contain reserved tool".into()));
        }
        BoxValue::Call(Ok(ProviderCall {
            tool: tool.clone(),
            tool_version: KTOOL_VERSION.into(),
            arguments: Value::Object(arguments.clone()),
        }))
    }

    fn box_text<'a>(&self, box_: &'a Self::Box) -> &'a str {
        match box_ {
            BoxValue::History(text) => text,
            BoxValue::Call(_) => "",
        }
    }
}

pub fn project(box_: &ChatBox) -> BoxValue {
    BoxValue::History(format!(
        "[Box {} | {}]\n{}",
        box_.id().get(),
        box_.box_type(),
        box_.contents()
    ))
}