use crate::context::ir::{IrMessage, IrPart, build_tool_call, extract_text};
use crate::context::{ContextReader, for_each_jsonl_record};
use crate::message::{
AssistantResponse, BashOutput, Context, ContextListing, ConversationMessage, Entry,
MessageKind, TextContent, ToolResultData,
};
use anyhow::Context as _;
use serde_json::Value;
use std::fs;
use std::io::{BufRead, BufReader};
use std::path::{Path, PathBuf};
fn session_id(file_path: &Path) -> String {
file_path.file_stem().map_or_else(
|| "unknown".to_string(),
|stem| stem.to_string_lossy().into_owned(),
)
}
pub struct JsonlReader {
file_path: PathBuf,
}
impl JsonlReader {
pub fn new(file_path: PathBuf) -> Self {
Self { file_path }
}
}
impl ContextReader for JsonlReader {
fn list_contexts(&self) -> anyhow::Result<Vec<ContextListing>> {
let file_path = &self.file_path;
let file =
fs::File::open(file_path).with_context(|| format!("open {}", file_path.display()))?;
let mut reader = BufReader::new(file);
let mut first_line = String::new();
reader
.read_line(&mut first_line)
.with_context(|| format!("read {}", file_path.display()))?;
let first_line = first_line.trim_end().to_string();
if first_line.is_empty() {
anyhow::bail!("empty file");
}
let session: Value = serde_json::from_str(&first_line)?;
if session["type"].as_str() != Some("session") {
anyhow::bail!("first line is not a session header");
}
let id = session_id(file_path);
let cwd = session["cwd"].as_str().unwrap_or("").to_string();
let detail = if cwd.is_empty() {
String::new()
} else {
format!("cwd: {cwd}")
};
Ok(vec![ContextListing { id, detail }])
}
fn delete_context(&self, _context_id: &str) -> anyhow::Result<()> {
fs::remove_file(&self.file_path)
.with_context(|| format!("remove {}", self.file_path.display()))
}
fn read_context(&self, _context_id: &str) -> anyhow::Result<Context> {
let mut entries = Vec::new();
let mut messages = Vec::new();
let mut cwd = String::new();
for_each_jsonl_record(&self.file_path, |_line_num, entry_json| {
let entry_type = entry_json["type"].as_str().unwrap_or("").to_string();
if entry_type == "session" {
if cwd.is_empty() {
if let Some(value) = entry_json["cwd"].as_str() {
cwd = value.to_string();
}
}
return;
}
let id = entry_json["id"].as_str().unwrap_or("").to_string();
let parent_id = entry_json["parentId"].as_str().unwrap_or("").to_string();
if let Some(raw_msg) = entry_json.get("message") {
let kind = jsonl_build_message_kind(&entry_type, raw_msg);
messages.push(ConversationMessage::new(id.clone(), kind));
}
entries.push(Entry { id, parent_id });
})?;
Ok(Context {
entries,
messages,
cwd: (!cwd.is_empty()).then_some(cwd),
})
}
}
fn jsonl_build_message_kind(msg_type: &str, msg: &Value) -> MessageKind {
let role = msg["role"].as_str().unwrap_or(msg_type).to_string();
let content = msg.get("content");
match role.as_str() {
"assistant" => {
let mut ir = IrMessage::new();
if let Some(Value::Array(parts)) = content {
for part in parts {
match part["type"].as_str() {
Some("text") => {
ir.push(IrPart::text(part["text"].as_str().unwrap_or("")));
}
Some("thinking" | "redacted_thinking") => {
if let Some(text) = part["text"].as_str() {
ir.push(IrPart::thinking(text));
}
}
Some("toolCall" | "tool_use") => {
let name = part["name"].as_str().unwrap_or("");
let id = part["id"].as_str().or_else(|| part["toolCallId"].as_str());
let arguments = part.get("arguments").or_else(|| part.get("input"));
ir.push(IrPart::tool_call(build_tool_call(
id.unwrap_or(""),
name,
arguments,
)));
}
_ => {}
}
}
}
MessageKind::AssistantResponse(AssistantResponse {
thinking: ir.thinking(),
tool_calls: ir.tool_calls(),
text: ir.text(),
})
}
"toolResult" | "bashExecution" => {
let content_str = extract_text(content);
if role == "bashExecution" {
let command = msg["command"].as_str().unwrap_or("").to_string();
MessageKind::BashOutput(BashOutput {
command,
output: content_str,
})
} else {
let tool_name = msg["toolName"].as_str().unwrap_or("").to_string();
let is_error = msg["isError"].as_bool().unwrap_or(false);
let call_id = msg["toolUseId"].as_str().unwrap_or("").to_string();
MessageKind::ToolResultData(ToolResultData {
call_id,
tool_name,
content: content_str,
is_error,
})
}
}
_ => MessageKind::TextContent(TextContent {
role,
text: extract_text(content),
}),
}
}