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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
use super::dispatch_json::{blocking_json, Deserialize, JsonOp, Value};
use crate::op_error::OpError;
use crate::repl;
use crate::repl::Repl;
use crate::state::State;
use deno_core::CoreIsolate;
use deno_core::CoreIsolateState;
use deno_core::ZeroCopyBuf;
use std::rc::Rc;
use std::sync::Arc;
use std::sync::Mutex;
pub fn init(i: &mut CoreIsolate, s: &Rc<State>) {
i.register_op("op_repl_start", s.stateful_json_op2(op_repl_start));
i.register_op("op_repl_readline", s.stateful_json_op2(op_repl_readline));
}
struct ReplResource(Arc<Mutex<Repl>>);
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
struct ReplStartArgs {
history_file: String,
}
fn op_repl_start(
isolate_state: &mut CoreIsolateState,
state: &Rc<State>,
args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<JsonOp, OpError> {
let args: ReplStartArgs = serde_json::from_value(args)?;
debug!("op_repl_start {}", args.history_file);
let history_path =
repl::history_path(&state.global_state.dir, &args.history_file);
let repl = repl::Repl::new(history_path);
let resource = ReplResource(Arc::new(Mutex::new(repl)));
let mut resource_table = isolate_state.resource_table.borrow_mut();
let rid = resource_table.add("repl", Box::new(resource));
Ok(JsonOp::Sync(json!(rid)))
}
#[derive(Deserialize)]
struct ReplReadlineArgs {
rid: i32,
prompt: String,
}
fn op_repl_readline(
isolate_state: &mut CoreIsolateState,
_state: &Rc<State>,
args: Value,
_zero_copy: &mut [ZeroCopyBuf],
) -> Result<JsonOp, OpError> {
let args: ReplReadlineArgs = serde_json::from_value(args)?;
let rid = args.rid as u32;
let prompt = args.prompt;
debug!("op_repl_readline {} {}", rid, prompt);
let resource_table = isolate_state.resource_table.borrow();
let resource = resource_table
.get::<ReplResource>(rid)
.ok_or_else(OpError::bad_resource_id)?;
let repl = resource.0.clone();
blocking_json(false, move || {
let line = repl.lock().unwrap().readline(&prompt)?;
Ok(json!(line))
})
}
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