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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.use atty;
use crate::flags::DenoFlags;
use crate::errors::permission_denied;use crate::errors::DenoResult;use std::io;use std::sync::atomic::{AtomicBool, Ordering};
#[cfg_attr(feature = "cargo-clippy", allow(stutter))]#[derive(Debug, Default)]pub struct DenoPermissions {  pub allow_write: AtomicBool,  pub allow_net: AtomicBool,  pub allow_env: AtomicBool,  pub allow_run: AtomicBool,}
impl DenoPermissions {  pub fn new(flags: &DenoFlags) -> Self {    Self {      allow_write: AtomicBool::new(flags.allow_write),      allow_env: AtomicBool::new(flags.allow_env),      allow_net: AtomicBool::new(flags.allow_net),      allow_run: AtomicBool::new(flags.allow_run),    }  }
  pub fn check_run(&self) -> DenoResult<()> {    if self.allow_run.load(Ordering::SeqCst) {      return Ok(());    };    // TODO get location (where access occurred)    let r = permission_prompt("Deno requests access to run a subprocess.");    if r.is_ok() {      self.allow_run.store(true, Ordering::SeqCst);    }    r  }
  pub fn check_write(&self, filename: &str) -> DenoResult<()> {    if self.allow_write.load(Ordering::SeqCst) {      return Ok(());    };    // TODO get location (where access occurred)    let r = permission_prompt(&format!(      "Deno requests write access to \"{}\".",      filename    ));;    if r.is_ok() {      self.allow_write.store(true, Ordering::SeqCst);    }    r  }
  pub fn check_net(&self, domain_name: &str) -> DenoResult<()> {    if self.allow_net.load(Ordering::SeqCst) {      return Ok(());    };    // TODO get location (where access occurred)    let r = permission_prompt(&format!(      "Deno requests network access to \"{}\".",      domain_name    ));    if r.is_ok() {      self.allow_net.store(true, Ordering::SeqCst);    }    r  }
  pub fn check_env(&self) -> DenoResult<()> {    if self.allow_env.load(Ordering::SeqCst) {      return Ok(());    };    // TODO get location (where access occurred)    let r =      permission_prompt(&"Deno requests access to environment variables.");    if r.is_ok() {      self.allow_env.store(true, Ordering::SeqCst);    }    r  }}
fn permission_prompt(message: &str) -> DenoResult<()> {  if !atty::is(atty::Stream::Stdin) || !atty::is(atty::Stream::Stderr) {    return Err(permission_denied());  };  // print to stderr so that if deno is > to a file this is still displayed.  eprint!("{} Grant? [yN] ", message);  let mut input = String::new();  let stdin = io::stdin();  let _nread = stdin.read_line(&mut input)?;  let ch = input.chars().next().unwrap();  let is_yes = ch == 'y' || ch == 'Y';  if is_yes {    Ok(())  } else {    Err(permission_denied())  }}