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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
use super::dispatch_json::{Deserialize, JsonOp, Value};
use crate::deno_error;
use crate::fs as deno_fs;
use crate::resources;
use crate::state::ThreadSafeState;
use deno::*;
use futures::Future;
use std;
use std::convert::From;
use tokio;
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
struct OpenArgs {
promise_id: Option<u64>,
filename: String,
mode: String,
}
pub fn op_open(
state: &ThreadSafeState,
args: Value,
_zero_copy: Option<PinnedBuf>,
) -> Result<JsonOp, ErrBox> {
let args: OpenArgs = serde_json::from_value(args)?;
let (filename, filename_) = deno_fs::resolve_from_cwd(&args.filename)?;
let mode = args.mode.as_ref();
let mut open_options = tokio::fs::OpenOptions::new();
match mode {
"r" => {
open_options.read(true);
}
"r+" => {
open_options.read(true).write(true);
}
"w" => {
open_options.create(true).write(true).truncate(true);
}
"w+" => {
open_options
.read(true)
.create(true)
.write(true)
.truncate(true);
}
"a" => {
open_options.create(true).append(true);
}
"a+" => {
open_options.read(true).create(true).append(true);
}
"x" => {
open_options.create_new(true).write(true);
}
"x+" => {
open_options.create_new(true).read(true).write(true);
}
&_ => {
panic!("Unknown file open mode.");
}
}
match mode {
"r" => {
state.check_read(&filename_)?;
}
"w" | "a" | "x" => {
state.check_write(&filename_)?;
}
&_ => {
state.check_read(&filename_)?;
state.check_write(&filename_)?;
}
}
let is_sync = args.promise_id.is_none();
let op = open_options.open(filename).map_err(ErrBox::from).and_then(
move |fs_file| {
let resource = resources::add_fs_file(fs_file);
futures::future::ok(json!(resource.rid))
},
);
if is_sync {
let buf = op.wait()?;
Ok(JsonOp::Sync(buf))
} else {
Ok(JsonOp::Async(Box::new(op)))
}
}
#[derive(Deserialize)]
struct CloseArgs {
rid: i32,
}
pub fn op_close(
_state: &ThreadSafeState,
args: Value,
_zero_copy: Option<PinnedBuf>,
) -> Result<JsonOp, ErrBox> {
let args: CloseArgs = serde_json::from_value(args)?;
match resources::lookup(args.rid as u32) {
None => Err(deno_error::bad_resource()),
Some(resource) => {
resource.close();
Ok(JsonOp::Sync(json!({})))
}
}
}
#[derive(Deserialize)]
#[serde(rename_all = "camelCase")]
struct SeekArgs {
promise_id: Option<u64>,
rid: i32,
offset: i32,
whence: i32,
}
pub fn op_seek(
_state: &ThreadSafeState,
args: Value,
_zero_copy: Option<PinnedBuf>,
) -> Result<JsonOp, ErrBox> {
let args: SeekArgs = serde_json::from_value(args)?;
match resources::lookup(args.rid as u32) {
None => Err(deno_error::bad_resource()),
Some(resource) => {
let op = resources::seek(resource, args.offset, args.whence as u32)
.and_then(move |_| futures::future::ok(json!({})));
if args.promise_id.is_none() {
let buf = op.wait()?;
Ok(JsonOp::Sync(buf))
} else {
Ok(JsonOp::Async(Box::new(op)))
}
}
}
}
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