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use crate::error::bad_resource_id;
use crate::error::type_error;
use crate::error::AnyError;
use crate::include_js_files;
use crate::op_sync;
use crate::resources::ResourceId;
use crate::Extension;
use crate::OpState;
use crate::ZeroCopyBuf;
use std::io::{stdout, Write};
pub(crate) fn init_builtins() -> Extension {
Extension::builder()
.js(include_js_files!(
prefix "deno:core",
"core.js",
"error.js",
))
.ops(vec![
("op_close", op_sync(op_close)),
("op_print", op_sync(op_print)),
("op_resources", op_sync(op_resources)),
])
.build()
}
/// Return map of resources with id as key
/// and string representation as value.
pub fn op_resources(
state: &mut OpState,
_args: (),
_zero_copy: Option<ZeroCopyBuf>,
) -> Result<Vec<(ResourceId, String)>, AnyError> {
let serialized_resources = state
.resource_table
.names()
.map(|(rid, name)| (rid, name.to_string()))
.collect();
Ok(serialized_resources)
}
/// Remove a resource from the resource table.
pub fn op_close(
state: &mut OpState,
rid: Option<ResourceId>,
_zero_copy: Option<ZeroCopyBuf>,
) -> Result<(), AnyError> {
// TODO(@AaronO): drop Option after improving type-strictness balance in serde_v8
let rid = rid.ok_or_else(|| type_error("missing or invalid `rid`"))?;
state
.resource_table
.close(rid)
.ok_or_else(bad_resource_id)?;
Ok(())
}
/// Builtin utility to print to stdout/stderr
pub fn op_print(
_state: &mut OpState,
args: (String, bool),
_zero_copy: Option<ZeroCopyBuf>,
) -> Result<(), AnyError> {
let (msg, is_err) = args;
if is_err {
eprint!("{}", msg);
stdout().flush().unwrap();
} else {
print!("{}", msg);
stdout().flush().unwrap();
}
Ok(())
}
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