use crate::context::ContextReader;
use crate::context::ir::{
IrMessage, IrPart, build_tool_call, build_tool_result, extract_text,
extract_tool_result_from_part,
};
use crate::message::{
AssistantResponse, Context, ContextListing, ConversationMessage, Entry, MessageKind,
TextContent,
};
use anyhow::Context as _;
use rusqlite::Connection;
use serde_json::Value;
use std::path::PathBuf;
pub struct CrushReader {
db_path: PathBuf,
}
impl CrushReader {
pub fn new(db_path: PathBuf) -> Self {
Self { db_path }
}
}
impl ContextReader for CrushReader {
fn list_contexts(&self) -> anyhow::Result<Vec<ContextListing>> {
let conn = Connection::open(&self.db_path)
.with_context(|| format!("failed to open crush db at {}", self.db_path.display()))?;
let sql = "SELECT session_id, COUNT(*) FROM messages GROUP BY session_id";
let mut stmt = conn.prepare(sql)?;
let rows = stmt.query_map([], |row| {
Ok((row.get::<_, String>(0)?, row.get::<_, i64>(1)?))
})?;
let mut contexts = Vec::new();
for row in rows {
let (session_id, count) = row?;
let detail = format!("{count} messages");
contexts.push(ContextListing {
id: session_id,
detail,
path: Some(self.db_path.clone()),
});
}
Ok(contexts)
}
fn read_context(&self, context_id: &str) -> anyhow::Result<Context> {
let conn = Connection::open(&self.db_path)
.with_context(|| format!("failed to open crush db at {}", self.db_path.display()))?;
let sql = "SELECT role, parts FROM messages WHERE session_id = ?1 ORDER BY created_at";
let mut stmt = conn.prepare(sql)?;
let rows = stmt.query_map(rusqlite::params![context_id], |row| {
Ok((row.get::<_, String>(0)?, row.get::<_, String>(1)?))
})?;
let mut messages = Vec::new();
let mut entries = Vec::new();
let mut previous_entry_id = String::new();
for (idx, row) in rows.enumerate() {
let (role, parts_str) = row?;
let parts: Value = serde_json::from_str(&parts_str)?;
let crush_parts = crush_build_message_parts(&role, &parts)?;
let entry_id = format!("crush-{idx}");
let parent_id = previous_entry_id.clone();
entries.push(Entry {
id: entry_id.clone(),
parent_id,
});
previous_entry_id.clone_from(&entry_id);
let mut message = ConversationMessage::new(entry_id, crush_parts.kind);
message.metadata = crush_parts.metadata;
messages.push(message);
for (tri, tr) in crush_parts.tool_results.into_iter().enumerate() {
let tr_entry_id = format!("crush-{idx}-tr{tri}");
let tr_parent = previous_entry_id.clone();
entries.push(Entry {
id: tr_entry_id.clone(),
parent_id: tr_parent,
});
previous_entry_id.clone_from(&tr_entry_id);
messages.push(ConversationMessage::new(
tr_entry_id,
MessageKind::ToolResultData(tr),
));
}
}
Ok(Context { entries, messages })
}
}
struct CrushMessageParts {
kind: MessageKind,
tool_results: Vec<crate::message::ToolResultData>,
metadata: std::collections::BTreeMap<String, Value>,
}
fn crush_build_message_parts(role: &str, parts: &Value) -> anyhow::Result<CrushMessageParts> {
let parts = parts.as_array().context("parts is not an array")?;
let mut metadata = std::collections::BTreeMap::new();
metadata.insert("role".to_string(), Value::String(role.to_string()));
match role {
"user" => {
let array_value = Value::Array(parts.clone());
Ok(CrushMessageParts {
kind: MessageKind::TextContent(TextContent {
role: "user".to_string(),
text: extract_text(Some(&array_value)),
}),
tool_results: Vec::new(),
metadata,
})
}
"assistant" => {
let mut ir = IrMessage::new();
let mut tool_results = Vec::new();
for part in parts {
match part["type"].as_str() {
Some("text") => {
if let Some(t) = part["text"].as_str() {
ir.push(IrPart::Text(t.to_string()));
}
}
Some("tool_use") => {
let name = part["name"].as_str().unwrap_or("");
let arguments = part.get("input");
ir.push(IrPart::ToolCall(build_tool_call(name, arguments)));
if let Some(res) = part["result"].as_str() {
tool_results.push(build_tool_result(
name.to_string(),
res.to_string(),
false,
));
}
}
Some("tool_result") => {
if let Some(tr) = extract_tool_result_from_part(part) {
tool_results.push(tr);
}
}
_ => {}
}
}
Ok(CrushMessageParts {
kind: MessageKind::AssistantResponse(AssistantResponse {
thinking: ir.thinking(),
tool_calls: ir.tool_calls(),
text: ir.text(),
}),
tool_results,
metadata,
})
}
_ => {
let array_value = Value::Array(parts.clone());
Ok(CrushMessageParts {
kind: MessageKind::TextContent(TextContent {
role: role.to_string(),
text: extract_text(Some(&array_value)),
}),
tool_results: Vec::new(),
metadata,
})
}
}
}