1 files changed, 231 insertions, 0 deletions
diff --git a/cli/ops/files.rs b/cli/ops/files.rs
new file mode 100644
index 000000000..ce3285623
--- /dev/null
+++ b/cli/ops/files.rs
@@ -0,0 +1,231 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+use crate::deno_error;
+use crate::fs as deno_fs;
+use crate::msg;
+use crate::ops::empty_buf;
+use crate::ops::ok_buf;
+use crate::ops::serialize_response;
+use crate::ops::CliOpResult;
+use crate::resources;
+use crate::state::ThreadSafeState;
+use crate::tokio_write;
+use deno::*;
+use flatbuffers::FlatBufferBuilder;
+use futures::Future;
+use std;
+use std::convert::From;
+use tokio;
+
+pub fn op_open(
+  state: &ThreadSafeState,
+  base: &msg::Base<'_>,
+  data: Option<PinnedBuf>,
+) -> CliOpResult {
+  assert!(data.is_none());
+  let cmd_id = base.cmd_id();
+  let inner = base.inner_as_open().unwrap();
+  let (filename, filename_) =
+    deno_fs::resolve_from_cwd(inner.filename().unwrap())?;
+  let mode = inner.mode().unwrap();
+
+  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 op = open_options.open(filename).map_err(ErrBox::from).and_then(
+    move |fs_file| {
+      let resource = resources::add_fs_file(fs_file);
+      let builder = &mut FlatBufferBuilder::new();
+      let inner =
+        msg::OpenRes::create(builder, &msg::OpenResArgs { rid: resource.rid });
+      Ok(serialize_response(
+        cmd_id,
+        builder,
+        msg::BaseArgs {
+          inner: Some(inner.as_union_value()),
+          inner_type: msg::Any::OpenRes,
+          ..Default::default()
+        },
+      ))
+    },
+  );
+  if base.sync() {
+    let buf = op.wait()?;
+    Ok(Op::Sync(buf))
+  } else {
+    Ok(Op::Async(Box::new(op)))
+  }
+}
+
+pub fn op_close(
+  _state: &ThreadSafeState,
+  base: &msg::Base<'_>,
+  data: Option<PinnedBuf>,
+) -> CliOpResult {
+  assert!(data.is_none());
+  let inner = base.inner_as_close().unwrap();
+  let rid = inner.rid();
+  match resources::lookup(rid) {
+    None => Err(deno_error::bad_resource()),
+    Some(resource) => {
+      resource.close();
+      ok_buf(empty_buf())
+    }
+  }
+}
+
+pub fn op_read(
+  _state: &ThreadSafeState,
+  base: &msg::Base<'_>,
+  data: Option<PinnedBuf>,
+) -> CliOpResult {
+  let cmd_id = base.cmd_id();
+  let inner = base.inner_as_read().unwrap();
+  let rid = inner.rid();
+
+  match resources::lookup(rid) {
+    None => Err(deno_error::bad_resource()),
+    Some(resource) => {
+      let op = tokio::io::read(resource, data.unwrap())
+        .map_err(ErrBox::from)
+        .and_then(move |(_resource, _buf, nread)| {
+          let builder = &mut FlatBufferBuilder::new();
+          let inner = msg::ReadRes::create(
+            builder,
+            &msg::ReadResArgs {
+              nread: nread as u32,
+              eof: nread == 0,
+            },
+          );
+          Ok(serialize_response(
+            cmd_id,
+            builder,
+            msg::BaseArgs {
+              inner: Some(inner.as_union_value()),
+              inner_type: msg::Any::ReadRes,
+              ..Default::default()
+            },
+          ))
+        });
+      if base.sync() {
+        let buf = op.wait()?;
+        Ok(Op::Sync(buf))
+      } else {
+        Ok(Op::Async(Box::new(op)))
+      }
+    }
+  }
+}
+
+pub fn op_write(
+  _state: &ThreadSafeState,
+  base: &msg::Base<'_>,
+  data: Option<PinnedBuf>,
+) -> CliOpResult {
+  let cmd_id = base.cmd_id();
+  let inner = base.inner_as_write().unwrap();
+  let rid = inner.rid();
+
+  match resources::lookup(rid) {
+    None => Err(deno_error::bad_resource()),
+    Some(resource) => {
+      let op = tokio_write::write(resource, data.unwrap())
+        .map_err(ErrBox::from)
+        .and_then(move |(_resource, _buf, nwritten)| {
+          let builder = &mut FlatBufferBuilder::new();
+          let inner = msg::WriteRes::create(
+            builder,
+            &msg::WriteResArgs {
+              nbyte: nwritten as u32,
+            },
+          );
+          Ok(serialize_response(
+            cmd_id,
+            builder,
+            msg::BaseArgs {
+              inner: Some(inner.as_union_value()),
+              inner_type: msg::Any::WriteRes,
+              ..Default::default()
+            },
+          ))
+        });
+      if base.sync() {
+        let buf = op.wait()?;
+        Ok(Op::Sync(buf))
+      } else {
+        Ok(Op::Async(Box::new(op)))
+      }
+    }
+  }
+}
+
+pub fn op_seek(
+  _state: &ThreadSafeState,
+  base: &msg::Base<'_>,
+  data: Option<PinnedBuf>,
+) -> CliOpResult {
+  assert!(data.is_none());
+  let inner = base.inner_as_seek().unwrap();
+  let rid = inner.rid();
+  let offset = inner.offset();
+  let whence = inner.whence();
+
+  match resources::lookup(rid) {
+    None => Err(deno_error::bad_resource()),
+    Some(resource) => {
+      let op = resources::seek(resource, offset, whence)
+        .and_then(move |_| Ok(empty_buf()));
+      if base.sync() {
+        let buf = op.wait()?;
+        Ok(Op::Sync(buf))
+      } else {
+        Ok(Op::Async(Box::new(op)))
+      }
+    }
+  }
+}